Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Mar. 26, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair values of debt instruments	$ 16,100	$ 16,200
Outstanding principal amount of debt instruments	15,300	15,300
Unamortized discounts and issuance costs	1,000	1,000
Interest rate swaps | Designated as hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate notional amount of derivatives	1,200	1,200
Derivative liability, fair value	5	1
Foreign currency contracts | Designated as hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate notional amount of derivatives	4,200	4,000
Derivative liability, fair value	$ 78	$ 57