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Derivative Financial Instruments and Hedging Activities (Cash Flow Hedges) (Details) - Cash flow hedging - Interest rate swaps
$ in Millions
Aug. 31, 2019
USD ($)
Anticipated Debt Issuance  
Derivative [Line Items]  
Aggregate notional amount $ 200.0
2018 Term Loan Facility  
Derivative [Line Items]  
Aggregate notional amount 350.0
2017 Term Loan Facility  
Derivative [Line Items]  
Aggregate notional amount $ 200.0