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Leases Impact of Adoption (Details) - USD ($)
Aug. 31, 2019
Jun. 02, 2019
Jun. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Right of use assets $ 233,300,000   $ 0
Total operating lease liabilities 262,700,000    
Retained earnings $ 748,200,000   $ 712,700,000
Accounting Standards Update 2016-02      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Right of use assets   $ 245,000,000  
Total operating lease liabilities   275,000,000  
Retained earnings   $ 0