CONSOLIDATED STATEMENT OF 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, 2016	$ 41,529	$ 12,801	$ (3,550)	$ 36,470	$ (4,643)	$ 451
Net income	284			279		5
Currency translation adjustments	45				45
Changes in unrealized gain on marketable securities	(4)				(4)
Changes in fair value of cash flow hedges	11				11
Pension and other postretirement benefit plans	62				62
Shares sold to optionees, less shares exchanged	39	(29)	68
Vesting of restricted stock		(49)	49
Shares issued under employee stock purchase plan	96	(12)	108
Stock repurchase program	(372)		(372)
Stock-based compensation expense	88	88
Dividends declared	(697)			(697)
Other	(27)	(19)				(8)
Balance at Mar. 31, 2017	41,054	12,780	(3,697)	36,052	(4,529)	448
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	$ 530			525		5
Currency translation adjustments	44				39	5
Changes in unrealized gain on marketable securities	19				19
Changes in fair value of cash flow hedges	2				2
Pension and other postretirement benefit plans	55				55
Shares sold to optionees, less shares exchanged	20	$ (20)	40
Vesting of restricted stock		(29)	29
Shares issued under employee stock purchase plan	$ 107	(33)	$ 140
Shares issued under employee stock purchase plan, shares	2		2
Stock repurchase program	$ (97)		$ (97)
Stock repurchase program, shares	(1)		(1)
Stock-based compensation expense	$ 90	90
Dividends declared	(693)			(693)
Other	(12)	15				(27)
Balance at Mar. 31, 2018	$ 37,326	$ 12,998	$ (3,937)	$ 32,022	$ (4,159)	$ 402
Balance, shares at Mar. 31, 2018	1,385	1,434
Treasury shares, Balance at Mar. 31, 2018	(49)