Capital Stock and Earnings Per Share - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Preferred stock shares authorized	2,000,000
Preferred stock stated value per share (in dollars per share)	$ 1.00
Preferred stock, shares outstanding	0
Retirement of treasury stock (in shares)	15,000,000.0
Treasury stock acquired	$ 8,006	$ 296,520	$ 390,606
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ 8,000	$ 9,800	$ 8,600
Treasury stock, shares, acquired from employees	300,000	300,000	200,000
Cash dividends per share (in dollars per share)	$ 0.44	$ 1.50	$ 1.48
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities	1,400,000	1,100,000	1,100,000
Share Repurchase Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Treasury stock acquired		$ 286,700	$ 382,000
Stock repurchased (in shares)		8,200,000	9,200,000
Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Retirement of treasury stock (in shares)	15,000,000
Common stock stated value per share (in dollars per share)	$ 0.01

Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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