Debt - Debt (Parenthetical) (Detail)	9 Months Ended				9 Months Ended
	Sep. 29, 2012 8.375% Senior Notes Due In 2017	Mar. 31, 2012 8.375% Senior Notes Due In 2017	Dec. 31, 2011 8.375% Senior Notes Due In 2017	Nov. 13, 2009 8.375% Senior Notes Due In 2017	Sep. 29, 2012 8.125% Senior Notes Due In 2018	Dec. 31, 2011 8.125% Senior Notes Due In 2018	Aug. 17, 2010 8.125% Senior Notes Due In 2018
Debt Instrument [Line Items]
Interest rate on notes	8.375%	8.375%	8.375%		8.125%	8.125%	8.125%
Debt instrument maturity year	2017				2018
Discount rate on issue of senior notes				1.425%