Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Total stockholder's equity at beginning of period at Dec. 31, 2023		$ 683	$ 2,221	$ 9,755	$ (2,672)	$ (94)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			0			20
Dividends to common stockholders ($0.46, $0.44, $3.38 and $3.32 per share)				(908)
Net income	$ 938			938
Other comprehensive income	835				835
Purchase of treasury stock	(20)					(20)
Total stockholder's equity at end of period at Sep. 30, 2024	10,758	683	2,221	9,785	(1,837)	(94)
Total stockholder's equity at beginning of period at Jun. 30, 2024		683	2,210	9,623	(2,547)	(95)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			11			1
Dividends to common stockholders ($0.46, $0.44, $3.38 and $3.32 per share)				(121)
Net income	283			283
Other comprehensive income	710				710
Purchase of treasury stock						0
Total stockholder's equity at end of period at Sep. 30, 2024	10,758	683	2,221	9,785	(1,837)	(94)
Total stockholder's equity at beginning of period at Dec. 31, 2024	10,513	683	2,229	9,686	(1,991)	(94)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			(9)			19
Dividends to common stockholders ($0.46, $0.44, $3.38 and $3.32 per share)				(923)
Net income	976			976
Other comprehensive income	780				780
Purchase of treasury stock	(34)					(34)
Total stockholder's equity at end of period at Sep. 30, 2025	11,322	683	2,220	9,739	(1,211)	(109)
Total stockholder's equity at beginning of period at Jun. 30, 2025		683	2,213	9,460	(1,586)	(109)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			7			0
Dividends to common stockholders ($0.46, $0.44, $3.38 and $3.32 per share)				(124)
Net income	403			403
Other comprehensive income	375				375
Purchase of treasury stock						0
Total stockholder's equity at end of period at Sep. 30, 2025	$ 11,322	$ 683	$ 2,220	$ 9,739	$ (1,211)	$ (109)