Acquisitions (2014 Acquisitions) (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
	Jun. 30, 2014	Feb. 07, 2014	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014	Jan. 03, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill			$ 1,564.0		$ 1,564.0		$ 1,004.0
Business Acquisition, Pro Forma Information [Abstract]
Basic earnings per share as reported (in dollars per share)			$ 1.42	$ 1.06	$ 3.63	$ 3.27
Diluted earnings per share as reported (in dollars per share)			$ 1.41	$ 1.05	$ 3.61	$ 3.25
Benshaw and Hy-Bon
Business Acquisition, Pro Forma Information [Abstract]
Pro forma net sales						$ 2,515.4
Pro forma net income attributable to the Company						$ 145.2
Basic earnings per share as reported (in dollars per share)						$ 3.27
Pro forma basic earnings per share (in dollars per share)						3.23
Diluted earnings per share as reported (in dollars per share)						3.25
Pro forma diluted earnings per share (in dollars per share)						$ 3.20
Benshaw
Business Acquisition [Line Items]
Payments to acquire business	$ 51.0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Current assets	0.5
Trade receivables	10.4
Inventories	22.4
Property, plant and equipment	4.5
Intangible assets, subject to amortization	14.6
Goodwill	4.7
Total assets acquired	57.1
Accounts payable	3.7
Current liabilities assumed	2.2
Long-term liabilities assumed	0.2
Net assets acquired	$ 51.0
Hy-Bon
Business Acquisition [Line Items]
Payments to acquire business		$ 78.0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Current assets		1.7
Trade receivables		11.5
Inventories		14.3
Property, plant and equipment		8.1
Intangible assets, subject to amortization		13.4
Goodwill		40.6
Other assets		0.1
Total assets acquired		89.7
Accounts payable		5.5
Current liabilities assumed		5.1
Long-term liabilities assumed		1.1
Net assets acquired		$ 78.0