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)	(7,368)			(7,376)		8
Currency translation adjustments	(128)				(125)	(3)
Changes in fair value of cash flow hedges	(202)				(202)
Pension and other postretirement benefit plans	42				42
Shares sold to optionees, less shares exchanged		(117)	117
Vesting of restricted stock	85	(95)	180
Stock repurchase program	(26)		(26)
Stock-based compensation expense	108	108
Dividends declared	(694)			(694)
Other	(10)	(11)				1
Balance at Mar. 31, 2020	15,983	12,963	(3,360)	10,681	(4,723)	422
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)	$ 312			299		13
Currency translation adjustments	12				14	(2)
Changes in fair value of cash flow hedges	148				148
Pension and other postretirement benefit plans	$ 58				58
Vesting of restricted stock		$ (171)	$ 171
Vesting of restricted stock, shares	2		2
Shares issued under employee stock purchase plan	$ 62	(202)	$ 264
Shares issued under employee stock purchase plan, shares	4		4
Stock-based compensation expense	$ 84	84
Dividends declared	(175)			(175)
Other	(18)	(18)
Balance at Mar. 31, 2021	$ 12,972	$ 12,663	$ (2,598)	$ 7,142	$ (4,664)	$ 429
Balance, shares at Mar. 31, 2021	1,398	1,434
Treasury shares, Balance at Mar. 31, 2021			(36)