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			(16)							22
Dividends to common stockholders ($0.44, $0.42, $2.88 and $2.04 per share)				(557)
Net income	$ 580			580
Other comprehensive income (loss)	173						173
Purchase of treasury stock	(24)									(24)
Total stockholder's equity at end of period at Jun. 30, 2023	8,726	683	2,204	9,359			(3,425)			(95)
Total stockholder's equity at beginning of period at Mar. 31, 2023		683	2,196	9,191	9,191		(3,308)	(3,308)	0	(95)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			8							0
Dividends to common stockholders ($0.44, $0.42, $2.88 and $2.04 per share)				(115)
Net income	283			283
Other comprehensive income (loss)	(117)						(117)
Purchase of treasury stock										0
Total stockholder's equity at end of period at Jun. 30, 2023	8,726	683	2,204	9,359			(3,425)			(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			(11)							19
Dividends to common stockholders ($0.44, $0.42, $2.88 and $2.04 per share)				(787)
Net income	655			655
Other comprehensive income (loss)	125						125
Purchase of treasury stock	(20)									(20)
Total stockholder's equity at end of period at Jun. 30, 2024	9,874	683	2,210	9,623			(2,547)			(95)
Total stockholder's equity at beginning of period at Mar. 31, 2024		683	2,201	9,425	$ 9,425	$ 0	(2,572)	$ (2,572)		(75)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			9							0
Dividends to common stockholders ($0.44, $0.42, $2.88 and $2.04 per share)				(119)
Net income	317			317
Other comprehensive income (loss)	25						25
Purchase of treasury stock										(20)
Total stockholder's equity at end of period at Jun. 30, 2024	$ 9,874	$ 683	$ 2,210	$ 9,623			$ (2,547)			$ (95)