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Share Repurchase (Details) - USD ($)
shares in Millions, $ in Millions
9 Months Ended
Aug. 01, 2018
Jun. 21, 2016
Jun. 30, 2018
Subsequent Event [Line Items]      
Total repurchase authorization   500.0  
Stock repurchase program, period in force   5 years  
Stock repurchased during period (in shares)     5.0
Repurchase of equity     $ 187.3
Remaining authorized repurchase amount     $ 112.8
Subsequent Event      
Subsequent Event [Line Items]      
Total repurchase authorization 500.0