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Earnings per Share (Details) - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Weighted Average Number of Shares Outstanding Basic and Diluted [Line Items]          
Common stock outstanding (in shares) 95,600,000 94,500,000   95,600,000 94,500,000
Common stock repurchases (shares) 0 0 2,690,292 0 2,700,000
Shares related to tax withholding for share-based compensation (in shares)       100,000 200,000
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]          
Weighted-average number of common shares outstanding - basic (in shares) 95,500,000 94,500,000   95,300,000 95,300,000
Weighted-average number of common shares outstanding - diluted (in shares) 97,200,000 95,200,000   96,900,000 96,300,000
Potentially dilutive shares excluded from computation of dilutive earnings per share (in shares) 8,100,000 7,900,000   7,700,000 7,200,000
Stock options          
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]          
Incremental dilutive common shares (in shares) 200,000 0   100,000 100,000
Restricted stock units          
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]          
Incremental dilutive common shares (in shares) 1,500,000 700,000   1,500,000 900,000