Commitments and Contingencies - Additional Information (Detail) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2013 Patent	Dec. 31, 2015 USD ($) Patent	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Loss Contingencies [Line Items]
Rental expense under operating lease agreements | $			$ 1,100	$ 961	$ 759
Pledged or otherwise restricted cash, marketable securities, and certain fixed assets as collateral | $		$ 418	$ 418	$ 602
Personalized Media Communications, LLC
Loss Contingencies [Line Items]
Number of patents allegedly infringed	9
Personalized Media Communications LLC AWS
Loss Contingencies [Line Items]
Number of patents allegedly infringed	3
Smartflash LLC and Smartflash Technologies Limited
Loss Contingencies [Line Items]
Number of patents allegedly infringed		7