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Stockholders' Equity (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) vote $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) shares	Feb. 19, 2021 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Common stock shares authorized (in shares) | shares	300,000,000.0	300,000,000.0	300,000,000.0
Common stock par or stated value (in dollars per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01
Preferred stock authorized shares (in shares) | shares		10,000,000.0
Preferred stock par or stated value (in dollars per share) | $ / shares		$ 0.01
Common stock, voting rights per share held | vote		1
Remaining authorized repurchase amount		$ 201,600,000
Treasury stock repurchased (in shares) | shares		6,500,000	1,300,000	0
Treasury stock repurchased		$ 285,900,000	$ 102,300,000
Charitable stock donation	$ 8,900,000	0	8,900,000	$ 0
Charitable stock donation (in shares) | shares	(100,000)
Subsequent Event
Accumulated Other Comprehensive Income (Loss) [Line Items]
Authorized amount of stock to be repurchased					$ 400,000,000.0
Performance-based Restricted Stock Units
Accumulated Other Comprehensive Income (Loss) [Line Items]
Treasury stock repurchased		$ 45,900,000	$ 3,400,000	$ 4,600,000

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