Schedule of Carrying Value of Goodwill by Reporting Unit (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Dec. 29, 2013
Goodwill [Line Items]
Xsens Acquisition	$ 40.9
Goodwill	413.5	372.6
Accumulated Impairment Losses	(203.3)	(203.3)
Goodwill, Net	210.2	169.3
MCCC
Goodwill [Line Items]
Xsens Acquisition	40.9
Goodwill	202.9	162.0
Goodwill, Net	202.9	162.0
PCIA
Goodwill [Line Items]
Goodwill	156.1	156.1
Accumulated Impairment Losses	(148.8)	(148.8)
Goodwill, Net	7.3	7.3
SDT
Goodwill [Line Items]
Goodwill	54.5	54.5
Accumulated Impairment Losses	$ (54.5)	$ (54.5)