CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 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, 2017	$ 37,261	$ 12,975	$ (4,049)	$ 32,190	$ (4,274)	$ 419
Balance, shares at Dec. 31, 2017	1,384	1,434
Treasury shares, Balance at Dec. 31, 2017			(50)
Net income (loss)	$ 2,177			2,138		39
Currency translation adjustments	(196)				(191)	(5)
Changes in unrealized gain on marketable securities	(11)				(11)
Changes in fair value of cash flow hedges	(15)				(15)
Pension and other postretirement benefit plans	(22)				(22)
Shares sold to optionees, less shares exchanged	$ 34	$ (41)	$ 75
Shares sold to optionees, less shares exchanged, shares	1		1
Vesting of restricted stock		(72)	$ 72
Vesting of restricted stock, shares	1		1
Shares issued under employee stock purchase plan	$ 227	(67)	$ 294
Shares issued under employee stock purchase plan, shares	3		3
Stock repurchase program	$ (400)		$ (400)
Stock repurchase program, shares	(6)		(6)
Stock-based compensation expense	$ 345	345
Dividends declared	(2,770)			(2,770)
Stranded tax related to US pension	(109)			109	(109)
Other	(44)	(8)	$ 2	(9)		(29)
Balance at Dec. 31, 2018	$ 36,586	$ 13,132	$ (4,006)	31,658	(4,622)	424
Balance, shares at Dec. 31, 2018	1,383	1,434
Treasury shares, Balance at Dec. 31, 2018			(51)
Net income (loss)	$ (10,107)			(10,137)		30
Currency translation adjustments	66				67	(1)
Changes in fair value of cash flow hedges	(22)				(22)
Pension and other postretirement benefit plans	139				139
Shares sold to optionees, less shares exchanged	$ 23	$ (26)	$ 49
Shares sold to optionees, less shares exchanged, shares	1		1
Vesting of restricted stock		(155)	$ 155
Vesting of restricted stock, shares	2		2
Shares issued under employee stock purchase plan	$ 196	(249)	$ 445
Shares issued under employee stock purchase plan, shares	6		6
Stock repurchase program	$ (278)		$ (278)
Stock repurchase program, shares	(7)		(7)
Stock-based compensation expense	$ 405	405
Dividends declared	(2,770)			(2,770)
Other	(62)	(29)	$ 4			(37)
Balance at Dec. 31, 2019	$ 24,176	$ 13,078	$ (3,631)	18,751	(4,438)	416
Balance, shares at Dec. 31, 2019	1,385	1,434
Treasury shares, Balance at Dec. 31, 2019			(49)
Net income (loss)	$ (10,486)			(10,518)		32
Currency translation adjustments	(232)				(239)	7
Changes in fair value of cash flow hedges	(36)				(36)
Pension and other postretirement benefit plans	$ (171)				(171)
Shares sold to optionees, less shares exchanged, shares	6		6
Vesting of restricted stock		$ (173)	$ 173
Vesting of restricted stock, shares	2		2
Shares issued under employee stock purchase plan	$ 146	(298)	$ 444
Stock repurchase program	$ (26)		$ (26)
Stock repurchase program, shares	(1)		(1)
Stock-based compensation expense	$ 397	397
Dividends declared	(1,215)			(1,215)
Other	(64)	(34)	$ 7			(37)
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)