Schedule of Computation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Earnings Per Share Disclosure [Line Items]
Net income (loss)	$ 12.1	$ 24.7	$ 4.1	$ 38.2
Weighted average shares outstanding	127.3	126.8	127.4	126.7
Net income (loss) per share	$ 0.10	$ 0.19	$ 0.03	$ 0.30
Assumed exercise of common stock equivalents	1.1	2.0	1.4	2.4
Diluted weighted average common and common equivalent shares	128.4	128.8	128.8	129.1
Net income (loss) per share	$ 0.09	$ 0.19	$ 0.03	$ 0.30
Anti-dilutive common stock equivalents, non-vested stock, DSUs, RSUs, and PUs	2.0	2.8	2.2	4.0