Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Previously Reported	Retained Earnings Revision of Prior Period, Accounting Standards Update, Adjustment	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Previously Reported	Accumulated Other Comprehensive Loss Revision of Prior Period, Accounting Standards Update, Adjustment	Treasury Stock
Total stockholder's equity at beginning of period at Dec. 31, 2022		$ 683	$ 2,220	$ 9,336	$ 9,572	$ (236)	$ (3,598)	$ (3,557)	$ (41)	$ (93)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			(24)							22
Dividends to common stockholders ($2.44 and $1.62 per share)				(442)
Net income	$ 297			297
Other comprehensive income	290						290
Purchase of treasury stock	(24)									(24)
Total stockholder's equity at end of period at Mar. 31, 2023	8,667	683	2,196	9,191			(3,308)			(95)
Total stockholder's equity at beginning of period at Dec. 31, 2023	9,893	683	2,221	9,755	$ 9,755	$ 0	(2,672)	$ (2,672)	$ 0	(94)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			(20)							19
Dividends to common stockholders ($2.44 and $1.62 per share)				(668)
Net income	338			338
Other comprehensive income	100						100
Purchase of treasury stock										0
Total stockholder's equity at end of period at Mar. 31, 2024	$ 9,662	$ 683	$ 2,201	$ 9,425			$ (2,572)			$ (75)