Stock-Based Compensation Plans (Tables)
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12 Months Ended |
May 31, 2018 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Weighted-Average Assumptions |
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Year ended May 31,
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2018
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2018
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2017
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2016
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Performance stock options
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Stock options
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Risk-free interest rate
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2.4
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%
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2.1
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%
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1.2
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%
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1.9
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%
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Dividend yield
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3.3
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%
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3.4
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%
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3.6
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%
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3.6
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%
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Volatility factor
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0.18
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0.17
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0.18
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0.18
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Expected option life in years
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6.5
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6.1
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6.1
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6.1
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Weighted-average grant-date
fair value of stock options granted (per share)
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$
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7.45
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$
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6.47
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$
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5.74
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$
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5.25
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| Stock Option Activity |
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Weighted-
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Weighted-
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average
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Shares
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average
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remaining
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Aggregate
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subject
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exercise price
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contractual
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intrinsic
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In millions, except per share amounts
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to options
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per share
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term (years)
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value(1)
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Outstanding as of May 31, 2017
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4.2
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$
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42.02
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Granted
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0.7
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$
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57.40
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Exercised
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(0.4)
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$
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37.86
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Forfeited
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(0.1)
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$
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53.41
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Expired
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—
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$
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38.48
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Outstanding as of May 31, 2018
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4.4
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$
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44.60
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6.1
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$
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93.0
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Exercisable as of May 31, 2018
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2.8
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$
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38.72
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4.9
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$
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76.3
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(1)
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Market price of the underlying stock as of May 31, 2018 less the exercise price.
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| Other Information Pertaining to Stock Option |
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Year ended May 31,
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In millions
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2018
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2017
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2016
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Total intrinsic value of stock options exercised
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$
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9.1
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$
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23.8
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$
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14.5
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Total grant-date fair value of stock options vested
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$
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4.0
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$
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4.1
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$
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4.0
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| RSU Activity |
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Weighted-
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Weighted-
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average
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average
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remaining
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grant-date
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vesting
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Aggregate
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fair value
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period
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intrinsic
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In millions, except per share amounts
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RSUs
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per share
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(years)
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value(1)
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Nonvested as of May 31, 2017
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1.6
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$
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43.53
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Granted
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0.6
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$
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51.15
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Vested
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(1.0)
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$
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42.12
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Forfeited
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(0.1)
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$
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46.27
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Nonvested as of May 31, 2018
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1.1
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$
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48.79
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3.2
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$
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69.2
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(1)
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Intrinsic value for RSUs is based on the market price of the underlying stock as of May 31, 2018.
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| Other Information Pertaining to RSUs |
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Year ended May 31,
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In millions, except per share amounts
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2018
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2017
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2016
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Weighted-average grant-date fair value per share of RSUs granted
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$
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51.15
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$
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53.76
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$
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42.60
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Total intrinsic value of RSUs vested
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$
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60.9
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$
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32.3
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$
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25.9
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Total grant-date fair value of RSUs vested
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$
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42.4
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$
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19.3
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$
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17.3
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| Restricted Stock Activity |
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Weighted-
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average
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grant-date
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Restricted
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fair value
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In millions, except per share amounts
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shares
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per share
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Nonvested as of May 31, 2017
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0.1
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$
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53.05
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Granted
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0.1
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$
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57.50
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Vested
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(0.1)
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$
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50.64
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Forfeited
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—
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$
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56.53
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Nonvested as of May 31, 2018
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0.1
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$
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56.89
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| Other Information Pertaining to Restricted Stock |
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Year ended May 31,
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In millions, except per share amounts
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2018
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2017
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2016
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Weighted-average grant-date fair value per share of restricted stock granted
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$
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57.50
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$
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60.83
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$
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47.46
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Total grant-date fair value of restricted stock vested
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$
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3.0
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$
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3.0
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$
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3.0
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| Performance Share Activity |
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Weighted-
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average
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grant-date
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Performance
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fair value
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In millions, except per share amounts
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shares
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per share
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Nonvested as of May 31, 2017
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0.4
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$
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45.66
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Granted (1)
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0.2
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$
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53.08
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Vested
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(0.2)
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$
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38.68
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Forfeited
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—
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$
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48.89
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Nonvested as of May 31, 2018
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0.4
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$
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51.53
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(1)
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Performance shares granted assuming achievement of performance goals at target. Actual amount of shares to be earned may differ from this amount.
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| Other Information Pertaining to Performance Shares |
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Year ended May 31,
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In millions, except per share amounts
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2018
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2017
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2016
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Weighted-average grant-date fair value per share of performance shares granted
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$
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53.08
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$
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54.97
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$
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42.48
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Total grant-date fair value of performance shares vested
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$
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6.6
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$
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7.8
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$
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5.9
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| Performance Stock Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock Option Activity |
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Weighted-
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Weighted-
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average
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Shares
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average
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remaining
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Aggregate
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subject
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exercise price
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contractual
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intrinsic
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In millions, except per share amounts
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to options
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per share
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term (years)
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value(1)
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Outstanding as of May 31, 2017
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2.4
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$
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47.52
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Granted(2)
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0.1
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$
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59.93
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Exercised
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(0.3)
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$
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30.70
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Forfeited
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(0.1)
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$
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60.84
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Expired
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—
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$
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—
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Outstanding as of May 31, 2018
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2.1
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$
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49.26
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6.3
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$
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34.5
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Exercisable as of May 31, 2018
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0.8
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$
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31.99
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3.4
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$
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28.5
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(1)
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Market price of the underlying stock as of May 31, 2018 less the exercise price.
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(2)
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LTIP performance stock options granted assumes achievement of performance goals at target. Actual amount of shares to be earned may differ from this amount.
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| Other Information Pertaining to Stock Option |
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Year ended May 31,
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In millions
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2018
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2017
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2016
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Total intrinsic value of stock options exercised
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$
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7.9
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$
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12.4
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$
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1.0
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Total grant-date fair value of stock options vested
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$
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4.9
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$
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4.9
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$
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—
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| Performance-Based Restricted Stock [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Restricted Stock Activity |
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Weighted-
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average
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grant-date
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Restricted
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fair value
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In millions, except per share amounts
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shares
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per share
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Nonvested as of May 31, 2017
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0.2
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$
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53.74
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Granted(1)
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—
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$
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54.77
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Vested
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—
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$
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—
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Forfeited
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—
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$
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53.61
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Nonvested as of May 31, 2018
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0.2
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$
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53.86
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(1)
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LTIP performance shares granted assumes achievement of performance goals at target. Actual amount of shares to be earned may differ from this amount.
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