Schedule of Total Equity Based Compensation Expense by Type (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 19.8	$ 24.6	$ 27.0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	4.1	4.8	5.1
Cash-settled SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	(0.1)	(0.3)	0.2
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	11.4	16.9	17.0
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 4.4	$ 3.2	$ 4.7