Schedule of Selected Operating Segment Financial Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 28, 2014		Sep. 29, 2013		Sep. 28, 2014		Sep. 29, 2013
Segment Reporting Information [Line Items]
Revenue	$ 381.1		$ 364.6		$ 1,096.8		$ 1,064.3
Operating income	3.6		12.7		15.8		16.7
Restructuring, impairments, and other costs	(31.7)		(3.5)		(42.5)		(8.1)
Stock-based compensation expense					(25.0)		(21.3)
Selling, general and administrative expense	(53.8)		(52.0)		(164.3)		(155.8)
Charge for (release of) litigation					(4.4)		12.6
Other expense, net	1.5		1.4		5.2		7.6
Income before income taxes	2.1		11.3		10.6		9.1
Operating Segments | MCCC
Segment Reporting Information [Line Items]
Revenue	147.6		141.8		420.5		408.4
Operating income	36.6		26.3		94.5		61.6
Operating Segments | PCIA
Segment Reporting Information [Line Items]
Revenue	196.8		187.4		571.9		550.7
Operating income	46.1		33.5		111.5		84.2
Operating Segments | SDT
Segment Reporting Information [Line Items]
Revenue	36.7		35.4		104.4		105.2
Operating income	8.6		4.9		19.4		12.1
Corporate
Segment Reporting Information [Line Items]
Restructuring, impairments, and other costs	(31.7)		(3.5)		(42.5)		(8.1)
Stock-based compensation expense	(8.4)		(7.1)		(25.0)		(21.3)
Selling, general and administrative expense	(45.8)		(39.3)		(136.0)		(116.9)
Charge for (release of) litigation					(4.4)		12.6
Other	$ (1.8)	[1]	$ (2.1)	[1]	$ (1.7)	[1]	$ (7.5)	[1]

[1] Other during 2014 consists primarily of accelerated depreciation related to the scheduled closures of our Salt Lake and Penang manufacturing facilities and the 5-inch line at our Korea manufacturing facility. Other during 2013 consists primarily of accelerated depreciation on certain assets in our Salt Lake manufacturing facility. The company completed the closure of the 8-inch line at this facility as of the fourth quarter of 2013. The equipment is in the process of being 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 was accelerated over an 11 month time period.