Consolidated Statement of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock Issued	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Noncontrolling Interests Dividend Declared
Beginning Balance (in shares) at Dec. 31, 2012		428,597,000
Beginning Balance at Dec. 31, 2012		$ 536	$ 481	$ (2,796)	$ 8,823	$ (2,059)	$ 302
Beginning Balance, treasury stock (in shares) at Dec. 31, 2012	39,322,000
Increase (Decrease) in Stockholders' Equity
Net income in stockholders' equity	$ 2,221				2,142
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest							48
Other comprehensive income, net of tax
Unrealized translation	(494)					(499)	5
Employee postretirement benefits	302					298	4
Other	17					18	(1)
Stock-based awards exercised or vested			(33)	$ 264
Stock-based awards exercised or vested (in shares)				(4,108,000)
Income tax benefits on stock-based compensation	$ 35		46
Shares repurchased (in shares)				12,584,000
Shares repurchased				$ (1,214)
Recognition of stock-based compensation			92
Dividends declared					(1,244)
Distributions to noncontrolling interests								$ (39)
Other			8		(7)		(35)
Ending Balance (in shares) at Dec. 31, 2013		428,597,000
Ending Balance at Dec. 31, 2013		$ 536	594	(3,746)	9,714	(2,242)	284
Ending Balance, treasury stock (in shares) at Dec. 31, 2013	47,798,000
Increase (Decrease) in Stockholders' Equity
Net income in stockholders' equity	$ 1,595				1,526
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest							39
Other comprehensive income, net of tax
Unrealized translation	(835)					(819)	(15)
Employee postretirement benefits	(275)					(278)	3
Other	20					19	1
Stock-based awards exercised or vested			(54)	$ 180
Stock-based awards exercised or vested (in shares)				(2,783,000)
Income tax benefits on stock-based compensation	19		32
Shares repurchased (in shares)				18,246,000
Shares repurchased				$ (2,031)
Recognition of stock-based compensation			52
Dividends declared					(1,256)
Spin-off of health care business					(1,505)	9
Distributions to noncontrolling interests								(43)
Other			8		(9)	(1)	1
Ending Balance (in shares) at Dec. 31, 2014		428,597,000
Ending Balance at Dec. 31, 2014	$ 999	$ 536	632	(5,597)	8,470	(3,312)	270
Ending Balance, treasury stock (in shares) at Dec. 31, 2014	63,261,000
Increase (Decrease) in Stockholders' Equity
Net income in stockholders' equity	$ 1,066				1,013
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest							48
Other comprehensive income, net of tax
Unrealized translation	(922)					(905)	(17)
Employee postretirement benefits	942					945	(3)
Other	5					5
Stock-based awards exercised or vested			(47)	$ 186
Stock-based awards exercised or vested (in shares)				(2,888,000)
Income tax benefits on stock-based compensation	29		32
Shares repurchased (in shares)				7,364,000
Shares repurchased				$ (833)
Recognition of stock-based compensation			75
Dividends declared					(1,280)
Distributions to noncontrolling interests								$ (36)
Adjustments to Additional Paid in Capital, Decrease from Purchase of Noncontrolling Interests	(94)		(94)
Adjustments to Accumulated Other Comprehensive Income (Loss), Decrease from Purchase of Noncontrolling Interest						(12)
Shares purchased from noncontrolling interest							45
Other			11			1	(3)
Shares retired				(50,000,000)
Shares retired		$ (63)		$ 3,272	(3,209)
Ending Balance (in shares) at Dec. 31, 2015		378,597,000
Ending Balance at Dec. 31, 2015	$ 40	$ 473	$ 609	$ (2,972)	$ 4,994	$ (3,278)	$ 214
Ending Balance, treasury stock (in shares) at Dec. 31, 2015	17,737,000