Schedule of Total Equity Based Compensation Expense by Type (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 4.8	$ 8.0	$ 10.4	$ 15.6
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	0.9	1.3	2.0	2.6
Cash-settled SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	(0.2)	(0.1)	(0.1)	(0.2)
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	2.4	5.4	5.8	9.8
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 1.7	$ 1.4	$ 2.7	$ 3.4