Unaudited Quarterly Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Selected Quarterly Information [Line Items]
Total revenue	$ 341.1	$ 364.6	$ 356.5	$ 343.2	$ 333.4	$ 358.8	$ 361.5	$ 352.2	$ 1,405.4	$ 1,405.9	$ 1,588.8
Gross margin	105.5	114.9	103.7	92.4	99.3	120.1	117.7	104.9	416.5	442.0	559.2
Net income	$ 0.9	$ 12.1	$ (7.5)	$ (0.5)	$ (13.6)	$ 24.7	$ 11.9	$ 1.6	$ 5.0	$ 24.6	$ 145.5
Basic income (loss) per common share	$ 0.01	$ 0.10	$ (0.06)		$ (0.11)	$ 0.19	$ 0.09	$ 0.01	$ 0.04	$ 0.19	$ 1.15
Diluted income (loss) per common share	$ 0.01	$ 0.09	$ (0.06)		$ (0.11)	$ 0.19	$ 0.09	$ 0.01	$ 0.04	$ 0.19	$ 1.12