CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Non-controlling Interests
Beginning Balance at Dec. 31, 2013	$ 23,786	$ 20	$ 1,406	$ 21,114	$ (239)	$ 1,485
Beginning Balance (in shares) at Dec. 31, 2013		2,020
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Stock issued through stock option and stock purchase plans (in shares)		13
Stock issued through stock option and stock purchase plans	194	0	194
Tax benefit from stock options exercised	44		44
Restricted stock grants, cancellations and withholdings, net (in shares)		1
Restricted stock grants, cancellations and withholdings, net	(20)	0	(20)
Repurchase of common stock (in shares)		(16)
Repurchase of common stock	(405)		(405)
Stock options issued in business acquisitions	24		24
Stock-based compensation	244		244
Cash dividends declared	(209)			(209)
Impact from equity transactions of non-controlling interests	(107)		(124)			17
Change in market value of investments	19				18	1
Change in market value of derivatives	(3)				(3)
Translation adjustment	(4)				(4)
Convertible debt conversions and warrant settlement	0		0
Net income	432			392		40
Ending Balance at Mar. 31, 2014	23,995	20	1,363	21,297	(228)	1,543
Ending Balance (in shares) at Mar. 31, 2014		2,047
Beginning Balance at Dec. 31, 2014	23,525	20	0	22,242	(366)	1,629
Beginning Balance (in shares) at Dec. 31, 2014	1,985	1,985
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Stock issued through stock option and stock purchase plans (in shares)		6
Stock issued through stock option and stock purchase plans	121	0	121
Tax benefit from stock options exercised	13		13
Restricted stock grants, cancellations and withholdings, net (in shares)		5
Restricted stock grants, cancellations and withholdings, net	(64)	0	(64)
Repurchase of common stock (in shares)		(54)
Repurchase of common stock	(1,446)	(1)	(64)	(1,381)
Stock-based compensation	295		295
Cash dividends declared	(226)			(226)
Impact from equity transactions of non-controlling interests	(415)		(301)			(114)
Change in market value of investments	11				9	2
Change in market value of derivatives	3				4	(1)
Translation adjustment	(104)				(104)
Net income	291			252		39
Ending Balance at Mar. 31, 2015	$ 22,004	$ 19	$ 0	$ 20,887	$ (457)	$ 1,555
Ending Balance (in shares) at Mar. 31, 2015	1,942	1,942