Consolidated Statements of Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Shares [Member]	Non-Controlling Interests [Member]
Balance, beginning of year at Dec. 31, 2012		$ 561	$ 1,107	$ 8,628	$ (3,307)	$ (447)	$ 64
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(45)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(52)			380
Net income	1,078			1,054			24
Distributions	17						(17)
Dividend equivalents declared - (per share amounts: $1.06 in 2014 and $0.96 in 2013)				(5)
Dividends declared – (per share amounts: $1.06 in 2014 and $0.96 in 2013)				(526)
Other comprehensive income (loss), net of tax	94				94
Purchase of treasury shares						(400)
Other changes							7
Balance, end of period at Sep. 30, 2013	7,120	561	1,010	9,151	(3,213)	(467)	78
Balance, beginning of year at Dec. 31, 2013	7,975	561	1,028	9,452	(2,621)	(515)	70
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(26)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(80)			318
Net income	1,198			1,171			27
Distributions	13						(13)
Dividend equivalents declared - (per share amounts: $1.06 in 2014 and $0.96 in 2013)				(3)
Dividends declared – (per share amounts: $1.06 in 2014 and $0.96 in 2013)				(578)
Other comprehensive income (loss), net of tax	(274)				(274)
Purchase of treasury shares						(600)
Other changes							(2)
Balance, end of period at Sep. 30, 2014	$ 7,915	$ 561	$ 922	$ 10,042	$ (2,895)	$ (797)	$ 82