Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended	1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014 Patent	Sep. 30, 2013 Patent	Dec. 31, 2013 Patent
Loss Contingencies [Line Items]
Rental expense under operating lease agreements	$ 961	$ 759	$ 561
Pledged or otherwise restricted cash, marketable securities, and certain fixed assets as collateral	$ 602	$ 482		602		482
Smarflash LLC and Smartflash Technologies Limited
Loss Contingencies [Line Items]
Number of patents allegedly infringed				7
Personalized Media Communications, LLC
Loss Contingencies [Line Items]
Number of patents allegedly infringed					9
Personalized Media Communications, LLC | CloudFront, S3 and EC2
Loss Contingencies [Line Items]
Number of patents allegedly infringed					3
ContentGuard Holdings, Inc.
Loss Contingencies [Line Items]
Number of patents allegedly infringed						7
Maximum | Vendor Concentration Risk
Loss Contingencies [Line Items]
Concentration percentage, no more than	10.00%