Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.20.2
Income Taxes (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
May 31, 2018
May 31, 2020
May 31, 2019
May 31, 2018
May 31, 2017
Income Tax Contingency [Line Items]          
NOL carry forwards   $ 9.7 $ 10.6    
Corporate income tax rate   21.00% 21.00% 29.20% 35.00%
Blended statutory tax rate       29.20%  
Estimated tax benefits from Tax Act     $ 160.5    
Net tax benefit related to revaluation of net deferred tax liabilities     83.5    
Net tax benefit related to change in annual effective tax rate     $ 77.0    
Diluted earnings per share related to revaluation of net deferred tax liabilities     $ 0.23    
Diluted earnings per share related to change in annual effective tax rate     $ 0.21    
Reserve for uncertain tax positions   $ 26.5 $ 21.6    
Income tax expense, current   343.0 328.9 $ 343.2  
Impact of uncertain tax positions, if recognized, on effective income tax rate   26.5 $ 21.6    
Fiscal 2012 Through Fiscal 2017 [Member]          
Income Tax Contingency [Line Items]          
Decreased reserve for uncertain tax positions $ 27.2        
Income tax expense, current $ 2.7        
Federal [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards   $ 4.4      
Federal [Member] | Minimum [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards, Expiration date   May 31, 2022      
Federal [Member] | Maximum [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards, Expiration date   May 31, 2037      
State [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards   $ 5.3      
State [Member] | Minimum [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards, Expiration date   May 31, 2021      
State [Member] | Maximum [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards, Expiration date   May 31, 2039