Fair Value Measurements - Carrying Value and Estimated Fair Values of Outstanding Debt (Detail) (USD $) In Millions, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	$ 641.4	$ 649.2
Estimate of Fair Value, Fair Value Disclosure [Member] | 8.375% Senior Notes Due in 2017 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	231.7	234.4
Estimate of Fair Value, Fair Value Disclosure [Member] | 8.125% Senior Notes Due in 2018 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	409.7	414.8
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	590.0	590.0
Carrying (Reported) Amount, Fair Value Disclosure [Member] | 8.375% Senior Notes Due in 2017 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	215.0	215.0
Carrying (Reported) Amount, Fair Value Disclosure [Member] | 8.125% Senior Notes Due in 2018 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	$ 375.0	$ 375.0