Summary of Long-Term Debt and Related Weighted Average Interest Rates (Detail) (USD $) In Millions, unless otherwise specified	Sep. 29, 2012		Dec. 31, 2011
Debt Instrument [Line Items]
Long-term debt	$ 626.2	[1]	$ 695.4
7.875% Senior Notes due 2018
Debt Instrument [Line Items]
Long-term debt	313.3		347.9
Weighted Average Interest Rate	8.00%		8.00%
8.125% Senior Notes due 2020
Debt Instrument [Line Items]
Long-term debt	$ 312.9		$ 347.5
Weighted Average Interest Rate	8.25%		8.25%

[1] Unaudited.