Statements of Consolidated Stockholders' Equity - USD ($) $ in Millions		Total	Adoption of New Accounting Standard	[1]	Common Stock	Additional Capital Invested	Treasury Stock	Retained Earnings	Retained Earnings Adoption of New Accounting Standard	[1]	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Dec. 31, 2018					269,900,000
Balance at Dec. 31, 2018		$ 10,042			$ 3	$ 6,120	$ (1,993)	$ 6,715			$ (803)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		3,009						3,009
Other comprehensive income (loss)		85									85
Stock-settled share-based compensation		66				66
Repurchases of common stock (in shares)					(19,200,000)
Repurchases of common stock		(1,641)					(1,641)
Stock issued for share-based awards, net of shares withheld for tax (in shares)					500,000
Stock issued for share-based awards, net of shares withheld for tax		(30)				(57)	35	(8)
Balance (in shares) at Dec. 31, 2019					251,200,000
Balance at Dec. 31, 2019		11,531			$ 3	6,129	(3,599)	9,716			(718)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(7,069)						(7,069)
Other comprehensive income (loss)		(421)									(421)
Stock-settled share-based compensation		97				97
Issuance of common stock (in shares)					64,600,000
Issuance of common stock		2,103			$ 1	2,102
Repurchases of common stock (in shares)					(4,400,000)
Repurchases of common stock		(342)					(342)
Stock issued for share-based awards, net of shares withheld for tax (in shares)					400,000
Stock issued for share-based awards, net of shares withheld for tax		(19)				(59)	44	(4)
Warrants issued		$ 97				97
Balance (in shares) at Dec. 31, 2020		311,845,232			311,800,000
Balance at Dec. 31, 2020		$ 5,960	$ (17)		$ 4	8,366	(3,897)	2,626	$ (17)		(1,139)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	[1]	Accounting Standards Update 2016-13 [Member]
Net income (loss)		$ (1,964)						(1,964)
Other comprehensive income (loss)		197									197
Stock-settled share-based compensation		232				232
Issuance of common stock (in shares)					11,000,000.0
Issuance of common stock		532				532
Stock issued for share-based awards, net of shares withheld for tax (in shares)					1,000,000.0
Stock issued for share-based awards, net of shares withheld for tax		(27)				(73)	83	(37)
Warrants issued		$ 99				99
Balance (in shares) at Dec. 31, 2021		323,810,825			323,800,000
Balance at Dec. 31, 2021		$ 5,029			$ 4	$ 9,156	$ (3,814)	$ 625			$ (942)

[1] Transition adjustment due to the adoption of Accounting Standards Update No. 2016-13, Financial Instruments—Credit Losses.