Balance Sheet Components (Components of Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ 125
Other comprehensive income (loss) before reclassifications			(69)
Amounts reclassified from AOCI			(138)
Other comprehensive income (loss)	(584)	497	(207)	(439)
Ending balance	(82)		(82)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			16
Other comprehensive income (loss) before reclassifications			(623)
Amounts reclassified from AOCI			0
Other comprehensive income (loss)			(623)
Ending balance	(607)		(607)
Unrealized Gains on Available-for-Sale Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			50
Other comprehensive income (loss) before reclassifications			250
Amounts reclassified from AOCI			(122)
Other comprehensive income (loss)			128
Ending balance	178		178
Unrealized Gains on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			59
Other comprehensive income (loss) before reclassifications			304
Amounts reclassified from AOCI			(16)
Other comprehensive income (loss)			288
Ending balance	$ 347		$ 347