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, 2016	$ 41,529	$ 12,801	$ (3,550)	$ 36,470	$ (4,643)	$ 451
Net income	758			749		9
Currency translation adjustments	49				49
Changes in unrealized gain on marketable securities	(66)				(66)
Changes in fair value of cash flow hedges	23				23
Pension and other postretirement benefit plans	177				177
Shares sold to optionees, less shares exchanged	49	(39)	88
Vesting of restricted stock		(98)	98
Shares issued under employee stock purchase plan	212	(52)	264
Stock repurchase program	(868)		(868)
Stock-based compensation expense	261	261
Dividends declared	(2,083)			(2,083)
Other	(31)	(10)	2			(23)
Balance at Sep. 30, 2017	40,010	12,863	(3,966)	35,136	(4,460)	437
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	$ 1,628			1,599		29
Currency translation adjustments	(132)				(128)	(4)
Changes in unrealized gain on marketable securities	(33)				(33)
Changes in fair value of cash flow hedges	(8)				(8)
Pension and other postretirement benefit plans	130				130
Shares sold to optionees, less shares exchanged	$ 29	$ (37)	66
Vesting of restricted stock		(63)	$ 63
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	4		4
Stock repurchase program	$ (300)		$ (300)
Stock repurchase program, shares	(4)		(4)
Stock-based compensation expense	$ 259	259
Dividends declared	(2,077)			(2,077)
Other	(36)	(9)	$ 2			(29)
Balance at Sep. 30, 2018	$ 36,948	$ 13,058	$ (3,924)	$ 31,712	$ (4,313)	$ 415
Balance, shares at Sep. 30, 2018	1,385	1,434
Treasury shares, Balance at Sep. 30, 2018	(49)