Summary of Long-Term Debt and Related Weighted Average Interest Rates (Parenthetical) (Detail)	6 Months Ended	12 Months Ended
	Jun. 28, 2014	Dec. 31, 2013
7.875% Senior Notes due 2018
Debt Instrument [Line Items]
Long-term debt, stated coupon rate		7.875%
Long-term debt, maturity year		2018
8.125% Senior Notes due 2020
Debt Instrument [Line Items]
Long-term debt, stated coupon rate	8.125%	8.125%
Long-term debt, maturity date	Mar. 15, 2020	Mar. 15, 2020
4.75% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt, stated coupon rate	4.75%	4.75%
Long-term debt, maturity date	Jan. 15, 2023	Jan. 15, 2023
5.375% Senior Notes due 2024
Debt Instrument [Line Items]
Long-term debt, stated coupon rate	5.375%
Long-term debt, maturity year	2024