Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity	$ 4,057	$ 1	$ 1,104	$ 3,802	$ (850)
Shares outstanding, beginning balance (in shares) at Dec. 31, 2022		69,266
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued / (surrendered) under incentive compensation plan (in shares)		902
Shares issued / (surrendered) under incentive compensation plan	(24)		(44)		20
Share-based compensation	21		21
Repurchase of common stock (in shares)		(4,334)
Repurchase of common stock	(204)				(204)
Net income	454			454
Shares outstanding, ending balance (in shares) at Sep. 30, 2023		65,834
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity	4,079	$ 1	1,074	3,981	(977)
Shares outstanding, beginning balance (in shares) at Jun. 30, 2023		66,848
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued / (surrendered) under incentive compensation plan (in shares)		25
Shares issued / (surrendered) under incentive compensation plan	0		(1)		1
Share-based compensation	8		8
Repurchase of common stock (in shares)		(1,039)
Repurchase of common stock	(58)				(58)
Net income	275			275
Shares outstanding, ending balance (in shares) at Sep. 30, 2023		65,834
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity	4,304	$ 1	1,081	4,256	(1,034)
Total stockholders’ equity	4,282	$ 1	1,087	4,302	(1,108)
Shares outstanding, beginning balance (in shares) at Dec. 31, 2023		64,599
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued / (surrendered) under incentive compensation plan (in shares)		731
Shares issued / (surrendered) under incentive compensation plan	(28)		(47)		19
Share-based compensation	28		28
Repurchase of common stock (in shares)		(1,351)
Repurchase of common stock	(109)				(109)
Net income	465			465
Shares outstanding, ending balance (in shares) at Sep. 30, 2024		63,979
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity	4,594	$ 1	1,058	4,687	(1,152)
Shares outstanding, beginning balance (in shares) at Jun. 30, 2024		64,484
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued / (surrendered) under incentive compensation plan (in shares)		11
Shares issued / (surrendered) under incentive compensation plan	(1)		(1)		0
Share-based compensation	11		11
Repurchase of common stock (in shares)		(516)
Repurchase of common stock	(46)				(46)
Net income	80			80
Shares outstanding, ending balance (in shares) at Sep. 30, 2024		63,979
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity	$ 4,638	$ 1	$ 1,068	$ 4,767	$ (1,198)