Schedule of Selected Operating Segment Financial Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 25, 2011	Sep. 30, 2012	Sep. 25, 2011
Segment Reporting Information [Line Items]
Restructuring and impairments expense	$ (3.4)	$ (4.1)	$ (6.3)	$ (9.5)
Stock-based compensation expense			(18.4)	(19.0)
Selling, general and administrative expense	(48.0)	(54.4)	(157.8)	(167.8)
Charge for litigation			(1.3)
Total revenue	358.8	403.2	1,072.5	1,249.4
Operating income (loss)	26.4	43.8	44.6	150.6
Other expense, net	1.2	1.4	4.2	5.8
Income before income taxes	25.2	42.4	40.4	144.8
MCCC
Segment Reporting Information [Line Items]
Total revenue	142.2	148.4	432.9	440.2
Operating income (loss)	30.1	26.7	82.1	79.2
PCIA
Segment Reporting Information [Line Items]
Total revenue	180.2	204.6	530.8	643.9
Operating income (loss)	36.6	56.9	95.5	184.9
SDT
Segment Reporting Information [Line Items]
Total revenue	36.4	50.2	108.8	165.3
Operating income (loss)	5.6	12.0	15.2	40.8
Corporate
Segment Reporting Information [Line Items]
Restructuring and impairments expense	(3.4)	(4.1)	(6.3)	(9.5)
Stock-based compensation expense	(4.2)	(6.0)	(18.4)	(19.0)
Selling, general and administrative expense	(38.4)	(41.4)	(122.5)	(124.8)
Charge for litigation			(1.3)
Other	$ 0.1	$ (0.3)	$ 0.3	$ (1.0)