Schedule of Total Equity Based Compensation Expense by Type (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 2.0	$ 4.8	$ 5.1	$ 10.4
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	0.3	0.9	0.9	2.0
Cash-settled SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense		(0.2)		(0.1)
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	1.4	2.4	3.5	5.8
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 0.3	$ 1.7	$ 0.7	$ 2.7