Schedule of Selected Operating Segment Financial Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013		Jul. 01, 2012	Jun. 30, 2013		Jul. 01, 2012
Segment Reporting Information [Line Items]
Total revenue	$ 356.5		$ 361.5	$ 699.7		$ 713.7
Operating income (loss)	(1.8)		15.3	4.0		18.2
Restructuring and impairments expense	(3.4)		(0.5)	(4.6)		(2.9)
Stock-based compensation expense				(14.2)		(14.2)
Selling, general and administrative expense	(52.2)		(55.1)	(103.8)		(109.8)
Release of litigation charge			1.3	(12.6)		1.3
Other expense, net	1.6		1.5	6.2		3.0
Income (loss) before income taxes	(3.4)		13.8	(2.2)		15.2
MCCC
Segment Reporting Information [Line Items]
Total revenue	131.4		148.1	266.6		290.7
Operating income (loss)	17.3		27.1	35.3		52.0
PCIA
Segment Reporting Information [Line Items]
Total revenue	188.7		176.4	363.3		350.6
Operating income (loss)	29.7		33.9	50.7		58.9
SDT
Segment Reporting Information [Line Items]
Total revenue	36.4		37.0	69.8		72.4
Operating income (loss)	4.0		5.3	7.2		9.6
Corporate
Segment Reporting Information [Line Items]
Restructuring and impairments expense	(3.4)		(0.5)	(4.6)		(2.9)
Stock-based compensation expense	(7.9)		(7.3)	(14.2)		(14.2)
Selling, general and administrative expense	(38.8)		(41.9)	(77.6)		(84.1)
Release of litigation charge			(1.3)	12.6		(1.3)
Other	$ (2.7)	[1]		$ (5.4)	[1]	$ 0.2	[1]

[1] Other consists primarily of accelerated depreciation on certain assets in our Salt Lake manufacturing facility. The company is planning to close the 8 inch line at this facility. The equipment will be transferred to other Fairchild locations. The depreciation that relates to the initial installation cost of this equipment has been accelerated as these costs are specific to its installation in Salt Lake. The depreciation is being accelerated over an 11 month time period.