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, 2014		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)		6
Stock issued through stock option and stock purchase plans	121	$ 0	121
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	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)
Reversal of reclass of previously repurchased 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 (in shares) at Mar. 31, 2015		1,942
Ending Balance at Mar. 31, 2015	$ 22,004	$ 19	0	20,887	(457)	1,555
Beginning Balance (in shares) at Dec. 31, 2015	1,943	1,943
Beginning Balance at Dec. 31, 2015	$ 22,719	$ 19	0	21,700	(579)	1,579
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Stock issued through stock option and stock purchase plans (in shares)		5
Stock issued through stock option and stock purchase plans	106	$ 1	105
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	(16)		(16)
Restricted stock grants, cancellations and withholdings, net (in shares)		3
Restricted stock grants, cancellations and withholdings, net	(38)	$ 0	(38)
Stock Issued During Period, Shares, Employee Benefit Plan		2
Stock Issued During Period, Value, Employee Benefit Plan	44		44
Repurchase of common stock (in shares)		0
Reversal of reclass of previously repurchased common stock	0	$ 0	(372)	372
Stock-based compensation	313		313
Cash dividends declared	(229)			(229)
Impact from equity transactions of non-controlling interests	29		(36)			65
Change in market value of investments	22				19	3
Change in market value of derivatives	0				(1)	1
Translation adjustment	3				3
Net income	$ 297			268		29
Ending Balance (in shares) at Mar. 31, 2016	1,953	1,953
Ending Balance at Mar. 31, 2016	$ 23,250	$ 20	$ 0	$ 22,111	$ (558)	$ 1,677