Cash and Investments, Non-Marketable Cost Method Investments (Detail) $ in Millions, ¥ in Billions	12 Months Ended
	Dec. 26, 2015 USD ($)	Dec. 27, 2014 USD ($)	Dec. 28, 2013 USD ($)	Dec. 27, 2014 CNY (¥)
Schedule of Cost-method Investments [Line Items]
Non-marketable cost method investments	$ 2,933	$ 1,769
Cost-method Investments [Member]
Schedule of Cost-method Investments [Line Items]
Other than Temporary Impairment Losses, Investments	164	130	$ 103
Cloudera, Inc. [Member]
Schedule of Cost-method Investments [Line Items]
Non-marketable cost method investments	454	454
Beijing UniSpreadtrum Technology Ltd [Member]
Schedule of Cost-method Investments [Line Items]
Non-marketable cost method investments	966
Beijing UniSpreadtrum Technology Ltd Phase One [Member]
Schedule of Cost-method Investments [Line Items]
Non-marketable cost method investments	966
Subject To Regulatory Approvals And Other Closing Conditions [Member] | Beijing UniSpreadtrum Technology Ltd [Member]
Schedule of Cost-method Investments [Line Items]
Non-marketable cost method investments		$ 1,500		¥ 9.0
Cost Method Investment, Ownership Percentage		20.00%		20.00%
Subject To Regulatory Approvals And Other Closing Conditions [Member] | Beijing UniSpreadtrum Technology Ltd Phase Two [Member]
Schedule of Cost-method Investments [Line Items]
Non-marketable cost method investments	$ 500