Fair Value Measurements - Additional Information (Detail) (USD $)	Sep. 28, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair values of debt instruments	$ 7,700,000,000	$ 7,400,000,000
Outstanding principal amount of debt instruments	7,000,000,000	7,000,000,000
Unamortized discount on long-term debt	875,000,000	882,000,000
Foreign currency contracts | Designated as hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate notional amount of derivatives	988,000,000	1,000,000,000
Interest rate swaps | Designated as hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate notional amount of derivatives	$ 1,300,000,000	$ 1,200,000,000