Consolidated Statements of Stockholders' Equity - 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) Income	Accumulated Other Comprehensive (Loss) Income Previously Reported	Accumulated Other Comprehensive (Loss) Income Revision of Prior Period, Accounting Standards Update, Adjustment	Treasury Stock
Total stockholder's equity at beginning of period at Dec. 31, 2021		$ 683	$ 2,215	$ 9,639	$ 9,663	$ (24)	$ (1,360)	$ 320	$ (1,680)	$ (72)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			5							18
Dividends to common stockholders ($3.76, $2.88, and $3.60 per share)				(985)
Net income	$ 682			682
Other comprehensive income (loss)	(2,238)						(2,238)
Purchase of treasury stock										(39)
Total stockholder's equity at end of period at Dec. 31, 2022	8,548	683	2,220	9,336	9,572	(236)	(3,598)	(3,557)	(41)	(93)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			1							23
Dividends to common stockholders ($3.76, $2.88, and $3.60 per share)				(786)
Net income	1,205			1,205
Other comprehensive income (loss)	926						926
Purchase of treasury stock										(24)
Total stockholder's equity at end 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			8							20
Dividends to common stockholders ($3.76, $2.88, and $3.60 per share)				(1,028)
Net income	959			959
Other comprehensive income (loss)	681						681
Purchase of treasury stock										(20)
Total stockholder's equity at end of period at Dec. 31, 2024	$ 10,513	$ 683	$ 2,229	$ 9,686			$ (1,991)			$ (94)