Quarterly report pursuant to Section 13 or 15(d)

Basic and Diluted Earnings Per Share (Narrative) (Details)

v3.19.3
Basic and Diluted Earnings Per Share (Narrative) (Details) - USD ($)
shares in Millions, $ in Millions
 1 Months Ended 3 Months Ended
May 31, 2019
Aug. 31, 2019
Aug. 31, 2018
Equity, Class of Treasury Stock [Line Items]      
Common stock issued in connection with exercise or vesting of stock-based awards   0.6 0.5
Common stock repurchased and retired, values   $ 171.9 $ 32.8
Authorized in July 2016 [Member]      
Equity, Class of Treasury Stock [Line Items]      
Common stock repurchased and retired, shares     0.5
Common stock repurchased and retired, values     $ 32.8
Authorized In May 2019 [Member]      
Equity, Class of Treasury Stock [Line Items]      
Expiration date May 31, 2022    
Common stock repurchased and retired, shares   2.0  
Common stock repurchased and retired, values   $ 171.9  
Maximum [Member] | Authorized In May 2019 [Member]      
Equity, Class of Treasury Stock [Line Items]      
Approved repurchase amount $ 400.0