Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details 3)

v3.2.0.727
Income Taxes (Details 3) - USD ($)
$ in Millions
12 Months Ended
May. 31, 2015
May. 31, 2014
May. 31, 2013
Reconciliation of gross unrecognized tax benefits      
Balance as of beginning of fiscal year $ 40.0 $ 26.7 $ 41.7
Additions for tax positions of the current year 6.7 11.2 28.5
Additions for tax positions of prior years 0.8 4.2 12.2
Reductions for tax positions of prior years (0.4) (1.8) (0.5)
Settlements with tax authorities (1.2) 0.0 (55.0)
Expiration of the statute of limitations (6.0) (0.3) (0.2)
Balance as of end of fiscal year $ 39.9 $ 40.0 $ 26.7