Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.19.2
Income Taxes (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
May 31, 2018
Dec. 31, 2016
May 31, 2019
May 31, 2018
May 31, 2017
Income Tax Contingency [Line Items]          
NOL carry forwards $ 5.9 [1]   $ 10.6 $ 5.9 [1]  
Corporate income tax rate     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 14.7   $ 21.6 $ 14.7  
Income tax expense, current     328.9 343.2 [1] $ 410.1 [1]
Impact of uncertain tax positions, if recognized, on effective income tax rate 14.7   21.6 $ 14.7  
Fiscal 2012 Through Fiscal 2014 [Member]          
Income Tax Contingency [Line Items]          
Decreased reserve for uncertain tax positions   $ 28.9      
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     $ 5.6    
Federal [Member] | Minimum [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards, Expiration date     May 31, 2020    
Federal [Member] | Maximum [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards, Expiration date     May 31, 2036    
State [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards     $ 5.0    
State [Member] | Minimum [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards, Expiration date     May 31, 2020    
State [Member] | Maximum [Member]          
Income Tax Contingency [Line Items]          
NOL carry forwards, Expiration date     May 31, 2039    
[1] Amounts have been adjusted to reflect the adoption of ASC Topic 606.