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	$ 4,282	$ 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)		720
Shares issued / (surrendered) under incentive compensation plan	(27)		(46)		19
Share-based compensation	17		17
Repurchase of common stock (in shares)		835
Net income	385			385
Shares outstanding, ending balance (in shares) at Jun. 30, 2024		64,484
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Value	63				63
Total stockholders’ equity	4,405	$ 1	1,051	4,483	(1,130)
Shares outstanding, beginning balance (in shares) at Mar. 31, 2024		64,719
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued / (surrendered) under incentive compensation plan (in shares)		63
Shares issued / (surrendered) under incentive compensation plan	0		(2)		2
Share-based compensation	9		9
Repurchase of common stock (in shares)		298
Net income	204			204
Shares outstanding, ending balance (in shares) at Jun. 30, 2024		64,484
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Value	24				24
Total stockholders’ equity	4,594	$ 1	1,058	4,687	(1,152)
Total stockholders’ equity	4,813	$ 1	1,077	4,971	(1,236)
Shares outstanding, beginning balance (in shares) at Dec. 31, 2024		63,581
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued / (surrendered) under incentive compensation plan (in shares)		408
Shares issued / (surrendered) under incentive compensation plan	(26)		(40)		14
Share-based compensation	26		26
Net income	286			286
Shares outstanding, ending balance (in shares) at Jun. 30, 2025		63,989
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity	4,890	$ 1	1,052	5,059	(1,222)
Shares outstanding, beginning balance (in shares) at Mar. 31, 2025		63,983
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued / (surrendered) under incentive compensation plan (in shares)		6
Shares issued / (surrendered) under incentive compensation plan	(1)		(1)		0
Share-based compensation	12		12
Net income	198			198
Shares outstanding, ending balance (in shares) at Jun. 30, 2025		63,989
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity	$ 5,099	$ 1	$ 1,063	$ 5,257	$ (1,222)