Accounting Policies (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Revenue, Major Customer [Line Items]
PRQ Max	$ 770
Manufacturing Costs, less recession charge	540
Production Related Impairments or Charges [Abstract]
Inventory Write-down	185
Schedule of Equity Method Investments [Line Items]
Impairments	833	$ 187	$ 185
Credit Concentration Risk [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$ 800
Credit Concentration Risk [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	36.00%	31.00%
Maximum [Member]
Revenue, Major Customer [Line Items]
Manufacturing Costs	$ 46
Minimum [Member]
Revenue, Major Customer [Line Items]
Manufacturing Costs	1,100
Non-marketable equity investments [Member]
Schedule of Equity Method Investments [Line Items]
Other Long-term Investments	4,500	$ 4,400
Impairments	$ 555	$ 184	$ 166