CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock Issued	Common Stock In Treasury	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance at Dec. 31, 2019	$ 24,176	$ 13,078	$ (3,631)	$ 18,751	$ (4,438)	$ 416
Net income (loss)	(10,868)			(10,892)		24
Currency translation adjustments	(198)				(200)	2
Changes in fair value of cash flow hedges	(183)				(183)
Pension and other postretirement benefit plans	78				78
Vesting of restricted stock		(152)	152
Shares issued under employee stock purchase plan	146	(298)	444
Stock repurchase program	(26)		(26)
Stock-based compensation expense	318	318
Dividends declared	(1,041)			(1,041)
Other	(33)	(25)	6			(14)
Balance at Sep. 30, 2020	12,369	12,921	(3,055)	6,818	(4,743)	428
Balance at Jun. 30, 2020	12,456	13,044	(3,339)	7,073	(4,738)	416
Net income (loss)	(73)			(82)		9
Currency translation adjustments	(90)				(94)	4
Changes in fair value of cash flow hedges	43				43
Pension and other postretirement benefit plans	46				46
Vesting of restricted stock		(21)	21
Shares issued under employee stock purchase plan	61	(203)	264
Stock-based compensation expense	105	105
Dividends declared	(173)			(173)
Other	(6)	(4)	(1)			(1)
Balance at Sep. 30, 2020	12,369	12,921	(3,055)	6,818	(4,743)	428
Balance at Dec. 31, 2020	$ 12,489	$ 12,970	$ (3,033)	7,018	(4,884)	418
Balance, shares at Dec. 31, 2020	1,392	1,434
Treasury shares, Balance at Dec. 31, 2020			(42)
Net income (loss)	$ 1,317			1,280		37
Currency translation adjustments	4				6	(2)
Changes in fair value of cash flow hedges	6				6
Pension and other postretirement benefit plans	$ 179				179
Vesting of restricted stock		$ (227)	$ 227
Vesting of restricted stock, shares	3		3
Shares issued under employee stock purchase plan	$ 137	(377)	$ 514
Shares issued under employee stock purchase plan, shares	8		8
Stock-based compensation expense	$ 229	229
Dividends declared	(523)			(523)
Deconsolidation of subsidiary	(123)					(123)
Other	(50)	(24)	$ 5		(4)	(27)
Balance at Sep. 30, 2021	$ 13,665	$ 12,571	$ (2,287)	7,775	(4,697)	303
Balance, shares at Sep. 30, 2021	1,403	1,434
Treasury shares, Balance at Sep. 30, 2021			(31)
Balance at Jun. 30, 2021	$ 13,059	$ 12,730	$ (2,591)	7,399	(4,776)	297
Net income (loss)	562			550		12
Currency translation adjustments	30				30
Changes in fair value of cash flow hedges	(11)				(11)
Pension and other postretirement benefit plans	60				60
Vesting of restricted stock		(53)	53
Shares issued under employee stock purchase plan	75	(175)	250
Stock-based compensation expense	73	73
Dividends declared	(174)			(174)
Other	(9)	(4)	1			(6)
Balance at Sep. 30, 2021	$ 13,665	$ 12,571	$ (2,287)	$ 7,775	$ (4,697)	$ 303
Balance, shares at Sep. 30, 2021	1,403	1,434
Treasury shares, Balance at Sep. 30, 2021			(31)