Interest and Other Income, Net (Schedule of Interest and Other Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income and Expenses [Abstract]
Interest income	$ 259	$ 187	$ 725	$ 524
Interest expense	(26)	(25)	(78)	(76)
Realized gains (losses) on marketable securities, net	(6)	18	79	140
Foreign currency exchange losses, net	(100)	(67)	(261)	(269)
Realized gain on equity interest	0	0	0	126
Realized gains (losses) on non-marketable investments, net	7	(6)	(111)	111
Other income, net	49	26	117	79
Interest and other income, net	$ 183	$ 133	$ 471	$ 635