Goodwill and Other Intangible Assets - Rollforward (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Jun. 28, 2014	Jun. 27, 2015
Goodwill [Roll Forward]
Gross goodwill, beginning balance	[1]		$ 478.7
Impairment losses	[1]		(4.4)
Net goodwill	[1]		474.3
Goodwill purchase adjustment	[2]		25.2
Goodwill impairment loss	[2]		0.0
Total Goodwill Adjustments	[2]		25.2
Gross goodwill, ending balance	[1]		503.9
Impairment losses	[1]		(4.4)
Net goodwill	[1]		499.5
AQH
Goodwill [Roll Forward]
Gross goodwill, beginning balance	[1]		156.8
Impairment losses	[1]		0.0
Net goodwill	[1]		156.8
Goodwill purchase adjustment	[2]		0.0
Goodwill impairment loss	[2]		0.0
Total Goodwill Adjustments	[2]		0.0
Gross goodwill, ending balance	[1]		156.8
Impairment losses	[1]		0.0
Net goodwill	[1]		156.8
SCS
Goodwill [Roll Forward]
Gross goodwill, beginning balance	[1]		80.9
Impairment losses	[1]		0.0
Net goodwill	[1]		80.9
Goodwill purchase adjustment	[2]		0.0
Goodwill impairment loss	[2]		0.0
Total Goodwill Adjustments	[2]		0.0
Gross goodwill, ending balance	[1]		80.9
Impairment losses	[1]		0.0
Net goodwill	[1]		80.9
ERG
Goodwill [Roll Forward]
Gross goodwill, beginning balance	[1]		131.4
Impairment losses	[1]		0.0
Net goodwill	[1]		131.4
Goodwill purchase adjustment	[2]		25.1
Goodwill impairment loss	[2]		0.0
Total Goodwill Adjustments	[2]		25.1
Gross goodwill, ending balance	[1]		156.5
Impairment losses	[1]		0.0
Net goodwill	[1]		156.5
RCH
Goodwill [Roll Forward]
Gross goodwill, beginning balance	[1]		105.2
Impairment losses	[1]		0.0
Net goodwill	[1]		105.2
Goodwill purchase adjustment	[2]		0.1
Goodwill impairment loss	[2]		0.0
Total Goodwill Adjustments	[2]		0.1
Gross goodwill, ending balance	[1]		105.3
Impairment losses	[1]		0.0
Net goodwill	[1]		105.3
AVC
Goodwill [Roll Forward]
Gross goodwill, beginning balance	[1]		4.4
Impairment losses	[1]		(4.4)
Net goodwill	[1]		0.0
Goodwill purchase adjustment	[2]		0.0
Goodwill impairment loss		$ 4.4	0.0	[2]
Total Goodwill Adjustments	[2]		0.0
Gross goodwill, ending balance	[1]		4.4
Impairment losses	[1]		(4.4)
Net goodwill	[1]		$ 0.0

[1] The CAS and combined AVC reporting units did not have goodwill for any periods presented.

[2] Acquisition adjustments recorded during the first half of 2015 for the ERG and RCH segments relate to the acquisition of Anthro and Reznor, respectively. See Note B, “Acquisitions and Dispositions”.