Interest and Other Income, Net (Schedule of Interest and Other Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Income and Expenses [Abstract]
Interest income	$ 240	$ 169	$ 466	$ 337
Interest expense	(26)	(27)	(52)	(51)
Realized gains on marketable securities, net	53	48	85	122
Foreign currency exchange losses, net	(99)	(93)	(161)	(202)
Realized gain on equity interest	0	23	0	126
Realized gain (loss) on non-marketable investments, net	(70)	10	(118)	117
Other income (expense), net	33	15	68	53
Interest and other income, net	$ 131	$ 145	$ 288	$ 502