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Stockholders' Equity - Additional Information (Detail) - USD ($)			3 Months Ended		12 Months Ended
	Feb. 11, 2021	Feb. 12, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Feb. 12, 2019
Class of Stock [Line Items]
Shares repurchased value							$ 500,000,000
Repurchase of common stock (in shares)					55,000	133,000
Repurchase of common stock under share repurchase authorization					$ 4,700,000	$ 11,900,000
Remaining authorization for future share repurchases			$ 484,400,000		$ 484,400,000
Increase in dividend rate, percentage		29.00%
Dividend declared per share (in USD per share)		$ 0.18	$ 0.18	$ 0.14
Treasury stock (in shares)			36,227,061	36,500,908	36,227,061	36,500,908
Treasury stock, cost			$ 1,565,270,000	$ 1,574,464,000	$ 1,565,270,000	$ 1,574,464,000
Number of shares outstanding (in shares)			230,500,000	229,100,000	230,500,000	229,100,000
Subsequent Event
Class of Stock [Line Items]
Increase in dividend rate, percentage	11.00%
Dividend declared per share (in USD per share)	$ 0.20

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