Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Equity (Share Repurchase Program) (Details)

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Equity (Share Repurchase Program) (Details) - USD ($)
1 Months Ended 2 Months Ended 12 Months Ended
Feb. 29, 2020
Mar. 03, 2020
Dec. 31, 2019
Jan. 31, 2020
Nov. 30, 2019
Jun. 30, 2019
Feb. 28, 2019
Oct. 31, 2018
Apr. 30, 2018
Feb. 28, 2018
Equity, Class of Treasury Stock [Line Items]                    
Share repurchase program, authorized amount     $ 100,000,000   $ 200,000,000 $ 200,000,000 $ 200,000,000 $ 200,000,000 $ 200,000,000 $ 200,000,000
Treasury stock acquired (in shares)     11,950,824              
Treasury stock acquired, average price per share (in USD per share)     $ 50.82              
Shares cancelled (in shares)     10,000,000              
Subsequent Event                    
Equity, Class of Treasury Stock [Line Items]                    
Share repurchase program, authorized amount       $ 250,000,000            
Treasury stock acquired (in shares)   1,659,269                
Treasury stock acquired, average price per share (in USD per share)   $ 57.44                
Shares cancelled (in shares) 3,000,000