CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Non-controlling Interests
Beginning Balance (in shares) at Dec. 31, 2013		2,020
Beginning Balance at Dec. 31, 2013	$ 23,786	$ 20	$ 1,406	$ 21,114	$ (239)	$ 1,485
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Stock issued through stock option and stock purchase plans (in shares)		16
Stock issued through stock option and stock purchase plans	234	$ 0	234
Tax benefit from stock options exercised	43		43
Restricted stock grants, cancellations and withholdings, net (in shares)		3
Restricted stock grants, cancellations and withholdings, net	(28)	$ 0	(28)
Repurchase of common stock (in shares)		(39)
Repurchase of common stock	(1,000)		(1,000)
Stock options issued in business acquisitions	33		33
Stock-based compensation	506		506
Cash dividends declared	(446)			(446)
Impact from equity transactions of non-controlling interests	(401)		(376)			(25)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	1				1
Change in market value of investments	72				71	1
Change in market value of derivatives	(2)				(2)
Translation adjustment	4				4
Stock Issued During Period Shares Stock Conversion Of Convertible Securities And Warrants		29
Convertible debt conversions and warrant settlement	0		0
Net income	1,054			980		74
Ending Balance (in shares) at Jun. 30, 2014		2,029
Ending Balance at Jun. 30, 2014	$ 23,856	$ 20	818	21,648	(165)	1,535
Beginning Balance (in shares) at Dec. 31, 2014	1,985	1,985
Beginning Balance at Dec. 31, 2014	$ 23,525	$ 20	0	22,242	(366)	1,629
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Stock issued through stock option and stock purchase plans (in shares)		10
Stock issued through stock option and stock purchase plans	170	$ 0	170
Tax benefit from stock options exercised	43		43
Restricted stock grants, cancellations and withholdings, net (in shares)		6
Restricted stock grants, cancellations and withholdings, net	(71)	$ 0	(71)
Repurchase of common stock (in shares)		(76)
Repurchase of common stock	(2,033)	$ (1)	(20)	(2,012)
Stock-based compensation	560		560
Cash dividends declared	(453)			(453)
Impact from equity transactions of non-controlling interests	(901)		(682)			(219)
Change in market value of investments	(1)				(5)	4
Change in market value of derivatives	(2)				(1)	(1)
Translation adjustment	(86)				(86)
Net income	$ 811			739		72
Ending Balance (in shares) at Jun. 30, 2015	1,925	1,925
Ending Balance at Jun. 30, 2015	$ 21,562	$ 19	$ 0	$ 20,516	$ (458)	$ 1,485