Schedule of Selected Operating Segment Financial Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 25, 2011	Sep. 25, 2011	Jun. 26, 2011	Mar. 27, 2011	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Segment Reporting Information [Line Items]
Total revenue	$ 333.4	$ 358.8	$ 361.5	$ 352.2	$ 339.4	$ 403.2	$ 433.2	$ 413.0	$ 1,405.9	$ 1,588.8	$ 1,599.7
Operating income									44.7	164.9	184.6
Realized loss on sale of securities									12.9
Other expense, net									8.1	7.2	9.9
Income (loss) before income taxes									23.7	157.7	174.7
Restructuring and impairments expense									(14.1)	(2.8)	(7.0)
Stock-based compensation expense									(22.6)	(24.8)	(20.4)
Selling, general and administrative expense									(206.8)	(218.4)	(220.8)
Charge for litigation									(1.3)		(8.0)
MCCC
Segment Reporting Information [Line Items]
Total revenue									570.2	579.1	585.5
Operating income									103.5	100.4	141.3
PCIA
Segment Reporting Information [Line Items]
Total revenue									694.0	807.4	765.4
Operating income									120.2	211.9	205.6
SDT
Segment Reporting Information [Line Items]
Total revenue									141.7	202.3	248.8
Operating income									18.6	46.3	50.0
Corporate
Segment Reporting Information [Line Items]
Restructuring and impairments expense									(14.1)	(2.8)	(7.0)
Stock-based compensation expense									(22.6)	(24.8)	(20.9)
Selling, general and administrative expense									(159.8)	(162.8)	(169.3)
Charge for litigation									(1.3)		(8.0)
Other									$ 0.2	$ (3.3)	$ (7.1)