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Subsequent Events (Details) - USD ($)
2 Months Ended 12 Months Ended
Dec. 16, 2019
Oct. 31, 2019
Dec. 13, 2018
Oct. 31, 2018
Subsequent Event [Line Items]        
Authorized funds remaining under stock repurchase program     $ 500,000,000  
Aggregate shares repurchased (in shares)   3,838,466,000   0
BEAT tax expense   $ 11,300,000    
FTC tax benefit   $ 900,000    
Subsequent Event        
Subsequent Event [Line Items]        
Stock repurchased (in shares) 737,474      
Stock repurchases $ 27,400,000      
Average price of shares repurchased (in dollars per share) $ 37.21      
Aggregate shares repurchased (in shares) 4,575,940      
Authorized funds remaining under stock repurchase program $ 322,500,000