Fair Value Measurements - Company's Assets and Liabilities at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Sep. 26, 2014	Dec. 31, 2013
Level 1 [Member]
Assets
Cash equivalents	$ 359	$ 299
Derivatives (foreign currency forward contracts)
Total assets	359	299
Liabilities
Derivatives (foreign currency forward contracts)
Level 2 [Member]
Assets
Cash equivalents
Derivatives (foreign currency forward contracts)	5	6
Total assets	5	6
Liabilities
Derivatives (foreign currency forward contracts)	4	5
Level 3 [Member]
Assets
Cash equivalents
Derivatives (foreign currency forward contracts)
Total assets
Liabilities
Derivatives (foreign currency forward contracts)