Consolidated Statement of Stockholder's Equity - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Capital in excess of par value	Capital in excess of par value Cumulative Effect, Period of Adoption, Adjustment	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjustment	Treasury stock
Balance at beginning of period at Dec. 31, 2020	$ 8,876	$ 0	$ 888	$ 4,191		$ 14,777	$ 20	$ (105)	$ (20)	$ (10,875)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs	37			22						15
Share-based compensation	58			58
Stock warrants	45			45
Equity feature of partial extinguishment of convertible notes	(92)			(92)
Comprehensive income (loss)	1,490					977		513
Balance at end of period at Dec. 31, 2021	$ 10,414	$ (245)	888	4,224	$ (300)	15,774	$ 55	388		(10,860)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06
Issuance of common stock, net of issuance costs	$ 46			29						17
Share-based compensation	84			84
Cash dividends	(107)					(107)
Comprehensive income (loss)	495					539		(44)
Balance at end of period at Dec. 31, 2022	10,687		888	4,037		16,261		344		(10,843)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs	50			30						20
Share-based compensation	86			86
Cash dividends	(429)					(429)
Comprehensive income (loss)	121					465		(344)
Balance at end of period at Dec. 31, 2023	$ 10,515		$ 888	$ 4,153		$ 16,297		$ 0		$ (10,823)