Segment Reporting - Segment Reporting Information by Operating Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013
Segment Reporting Information [Line Items]
External revenue	$ 535.0	$ 543.2	$ 1,561.0	$ 1,612.4
Depreciation and amortization	27.2	25.1	78.5	74.7
Operating income (loss)	17.9	26.0	48.1	73.7
Additions to property, plant and equipment	10.8	10.2	31.4	44.7
Property, plant and equipment	462.5		462.5		483.7
Goodwill	187.1		187.1		137.3
Intangibles and other assets	364.6		364.6		296.2
Total assets	1,573.5		1,573.5		1,426.1
North America [Member]
Segment Reporting Information [Line Items]
External revenue	346.2	383.3	1,064.4	1,194.6
Depreciation and amortization	20.7	20.8	62.2	62.9
Operating income (loss)	8.2	17.6	25.6	58.1
Additions to property, plant and equipment	7.9	9.0	20.9	33.9
Property, plant and equipment	337.1		337.1		363.3
Goodwill	122.9		122.9		124.0
Intangibles and other assets	257.8		257.8		268.2
Total assets	1,049.1		1,049.1		1,089.5
United Kingdom [Member]
Segment Reporting Information [Line Items]
External revenue	172.0	142.9	446.7	368.2
Depreciation and amortization	6.1	3.8	15.0	10.3
Operating income (loss)	10.3	9.5	23.3	18.6
Additions to property, plant and equipment	2.5	1.2	10.1	9.5
Property, plant and equipment	117.0		117.0		111.0
Goodwill	59.7		59.7		8.8
Intangibles and other assets	106.6		106.6		27.7
Total assets	488.0		488.0		296.3
All Other [Member]
Segment Reporting Information [Line Items]
External revenue	16.8	17.0	49.9	49.6
Depreciation and amortization	0.4	0.5	1.3	1.5
Operating income (loss)	2.4	1.9	8.0	5.8
Additions to property, plant and equipment	0.4	0	0.4	1.3
Property, plant and equipment	8.4		8.4		9.4
Goodwill	4.5		4.5		4.5
Intangibles and other assets	0.2		0.2		0.3
Total assets	36.4		36.4		40.3
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	$ (3.0)	$ (3.0)	$ (8.8)	$ (8.8)