Schedule of Carrying Value of Goodwill by Operating Segment (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 28, 2015	Dec. 28, 2014
Goodwill [Line Items]
Balance at December 28, 2014	$ 209.2
Impairment loss	(0.6)	$ 0.0
Foreign exchange impact	(3.2)
Balance at June 28, 2015	205.4	209.2
SPS
Goodwill [Line Items]
Balance at December 28, 2014	105.1
Balance at June 28, 2015	105.1	105.1
APSS
Goodwill [Line Items]
Balance at December 28, 2014	103.0
Impairment loss	(0.6)
Foreign exchange impact	(3.2)
Balance at June 28, 2015	99.2	103.0
SPG
Goodwill [Line Items]
Balance at December 28, 2014	1.1
Balance at June 28, 2015	$ 1.1	$ 1.1