Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Effective tax rate	29.50%	27.50%
Previously accrued income tax due to the expiration of the statue of limitations		$ 10
Anticipated decrease in unrecognized tax benefits over the next 12 months	20
Accrued potential interest included within non-current income taxes payable	14		11
Accrued potential interest included within non-current income taxes payable, after income taxes	8		7
Potential penalties	8		8
U.S. Federal Research and Experimentation Tax Credit [Member]
Tax Credit Carryforward [Line Items]
Tax benefit		$ 28