Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Financial Liabilities Measured at Fair Value on Non-Recurring Basis) (Details)

v3.19.2
Fair Value Measurements (Financial Liabilities Measured at Fair Value on Non-Recurring Basis) (Details)
$ in Millions
May 31, 2019
USD ($)
Debt Instrument [Line Items]  
Total long-term borrowings, Amortized cost $ 800.0
Less: Debt issuance costs, net of accumulated amortization, Amortized cost (3.6)
Long-term borrowings, net of debt issuance costs, Amortized cost 796.4
Senior Notes, Series A [Member] | Senior Notes [Member]  
Debt Instrument [Line Items]  
Total long-term borrowings, Amortized cost 400.0
Senior Notes, Series B [Member] | Senior Notes [Member]  
Debt Instrument [Line Items]  
Total long-term borrowings, Amortized cost 400.0
Non-Recurring Basis [Member]  
Debt Instrument [Line Items]  
Total long-term borrowings, Fair value 838.5
Less: Debt issuance costs, net of accumulated amortization, Fair value (3.6)
Long-term borrowings, net of debt issuance costs, Fair value 834.9
Non-Recurring Basis [Member] | Senior Notes, Series A [Member] | Senior Notes [Member]  
Debt Instrument [Line Items]  
Total long-term borrowings, Fair value 418.4
Non-Recurring Basis [Member] | Senior Notes, Series B [Member] | Senior Notes [Member]  
Debt Instrument [Line Items]  
Total long-term borrowings, Fair value $ 420.1