Acquisitions and Divestitures (Narrative) (Details)				3 Months Ended								12 Months Ended
	Jul. 07, 2016 USD ($) installment	Jan. 18, 2016 USD ($)	Jan. 30, 2015 USD ($)	Dec. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jul. 01, 2017 USD ($)	Apr. 01, 2017 USD ($)	Dec. 31, 2016 USD ($)	Oct. 01, 2016 USD ($)	Jul. 02, 2016 USD ($)	Apr. 02, 2016 USD ($)	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)	Jun. 01, 2016 USD ($)
Business Acquisition [Line Items]
Acquisition-related expenses												$ 0	$ 0	$ 9,100,000
Net Sales				$ 820,700,000	$ 856,900,000	$ 869,200,000	$ 813,500,000	$ 758,100,000	$ 809,600,000	$ 838,600,000	$ 818,200,000	3,360,300,000	3,224,500,000	3,509,700,000
Income from Operations				78,300,000	94,000,000	83,000,000	74,800,000	70,100,000	89,800,000	91,400,000	69,300,000	330,100,000	320,600,000	252,800,000
Proceeds from Sale of Businesses												1,100,000	24,600,000	0
Power Transmission Solutions
Business Acquisition [Line Items]
Net Sales				196,600,000	192,900,000	191,300,000	184,600,000	173,700,000	169,700,000	189,400,000	200,800,000	765,400,000	733,600,000	773,600,000
Income from Operations				23,900,000	25,600,000	22,200,000	17,800,000	22,600,000	11,400,000	30,200,000	23,000,000
Commercial and Industrial Systems
Business Acquisition [Line Items]
Net Sales				407,700,000	408,000,000	407,400,000	381,200,000	369,200,000	389,400,000	394,700,000	377,600,000	1,604,300,000	1,530,900,000	1,694,900,000
Income from Operations				$ 24,000,000	$ 29,600,000	$ 20,600,000	$ 25,800,000	$ 20,500,000	$ 36,200,000	$ 25,100,000	$ 21,700,000
Mastergear | Operating Expenses | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal												100,000	11,600,000
Mastergear | Power Transmission Solutions | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Consideration for disposal															$ 25,700,000
Venezuelan Subsidiary | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal												$ 1,100,000	$ 1,700,000
Proceeds from Sale of Businesses	$ 1,000,000
Deferred gain on disposal	$ 2,000,000
Number of installments | installment	24
Venezuelan Subsidiary | Commercial and Industrial Systems | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Consideration for disposal	$ 3,000,000
Unsecured Debt | Credit Agreement Effective January 2015
Business Acquisition [Line Items]
Debt term			5 years
Principal amount			$ 1,250,000,000.00
Elco Group B.V.
Business Acquisition [Line Items]
Equity interest in acquiree		55.00%
Equity interest in acquiree including subsequent acquisition		100.00%
Consideration transferred		$ 19,600,000
Power Transmission Solutions
Business Acquisition [Line Items]
Consideration transferred			$ 1,408,900,000
Goodwill, expected tax deductible percent			65.00%
Net assets acquired			$ 1,408,900,000
Net Sales														512,900,000
Income from Operations														14,500,000
Purchase accounting adjustments and transaction costs														$ 29,800,000
Power Transmission Solutions | Level 3
Business Acquisition [Line Items]
Net assets acquired			$ 1,408,900,000