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			(69)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(36)			312
Net income	819			801			18
Dividend equivalents declared - (per share amounts: $0.78 in 2014 and $0.71 in 2013)				(3)
Dividends declared – (per share amounts: $0.78 in 2014 and $0.71 in 2013)				(390)
Other comprehensive income (loss), net of tax	(128)				(128)
Purchase of treasury shares						(250)
Other changes							(15)
Balance, end of period at Jun. 30, 2013	6,846	561	1,002	9,036	(3,435)	(385)	67
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			(47)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(67)			251
Net income	894			874			20
Dividend equivalents declared - (per share amounts: $0.78 in 2014 and $0.71 in 2013)				(2)
Dividends declared – (per share amounts: $0.78 in 2014 and $0.71 in 2013)				(427)
Other comprehensive income (loss), net of tax	14				14
Purchase of treasury shares						(350)
Other changes							(13)
Balance, end of period at Jun. 30, 2014	$ 8,228	$ 561	$ 914	$ 9,897	$ (2,607)	$ (614)	$ 77