Acquisitions (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended			9 Months Ended
	Dec. 01, 2014	Sep. 27, 2015	Jun. 28, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 31, 2014
Acquisition
Purchase price allocated to goodwill		$ 613.9		$ 492.8	$ 613.9	$ 492.8	$ 639.0
Estimated useful lives					12 years
Value of the assets and liabilities acquired
Goodwill		613.9		492.8	$ 613.9	492.8	$ 639.0
Customer relationships
Acquisition
Estimated useful lives					11 years 8 months 12 days
Technology
Acquisition
Estimated useful lives					9 years 9 months 18 days
Trade name
Acquisition
Estimated useful lives					14 years 4 months 24 days
Aerco
Acquisition
Reduction in the purchase price			$ 0.7
Aggregate consideration, net	$ 271.5
Purchase price allocated to goodwill	173.3
Purchase price allocated to intangible assets	102.4
Goodwill deductible for tax purposes	19.4
Acquisition accounting charges					$ 0.9
Value of the assets and liabilities acquired
Accounts receivable	17.2
Inventory	16.3
Fixed assets	7.7
Deferred tax assets	8.2
Other assets	7.6
Intangible assets	102.4
Goodwill	173.3
Accounts payable	(6.8)
Accrued expenses and other	(18.4)
Deferred tax liability	(36.0)
Purchase price	271.5
Revenues		34.9			89.5
Operating income		$ 7.8			15.1
Supplemental pro-forma information
Net sales				408.2	1,109.4	1,218.0
Net income				$ 26.2	$ 5.9	$ 63.9
Basic EPS				$ 0.74	$ 0.17	$ 1.81
Diluted EPS				$ 0.74	$ 0.17	$ 1.81
Net interest expense related to the financing				$ 0.9		$ 2.5
Net amortization expense				$ 1.1		$ 3.3
Net acquisition-related charges and third-party costs					$ 0.7
Aerco | Customer relationships
Acquisition
Purchase price allocated to intangible assets	$ 78.5
Estimated useful lives	16 years
Value of the assets and liabilities acquired
Intangible assets	$ 78.5
Aerco | Technology
Acquisition
Purchase price allocated to intangible assets	$ 15.8
Estimated useful lives	10 years
Value of the assets and liabilities acquired
Intangible assets	$ 15.8
Aerco | Trade name
Acquisition
Purchase price allocated to intangible assets	$ 7.4
Estimated useful lives	20 years
Value of the assets and liabilities acquired
Intangible assets	$ 7.4