Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended				9 Months Ended	12 Months Ended
	Dec. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jul. 01, 2017 USD ($)	Apr. 01, 2017 USD ($)	Sep. 29, 2018 USD ($)	Dec. 29, 2018 USD ($) segment	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Property, Plant and Equipment [Line Items]
Number of operating segments (in segment) | segment						3
Amortization period						12 months
Revenue, performance obligation, description of timing						Due to the short nature of the Company’s contracts, the Company has adopted a practical expedient to not disclose revenue allocated to remaining performance obligations as substantially all of its contracts have original terms of 12 months or less.
Research and development costs						$ 29.3	$ 29.9	$ 29.5
Percentage of fair value in excess of carrying value						10.00%
Net Sales	$ 881.7	$ 925.4	$ 959.7	$ 878.8		$ 3,645.6	3,360.3	3,224.5
Business exit costs						0.0	3.9	0.0
Asset Impairments						8.7	0.0	0.0
Power Transmission Solutions
Property, Plant and Equipment [Line Items]
Net Sales	$ 212.8	$ 207.7	$ 213.4	$ 204.9		838.8	765.4	733.6
Hermetic Climate
Property, Plant and Equipment [Line Items]
Net Sales						52.6	60.4
Hermetic Climate | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Business exit costs						34.9
Goodwill | Hermetic Climate | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Asset Impairments						9.5
Customer Relationships | Hermetic Climate | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Asset Impairments						5.5
Technology | Hermetic Climate | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Asset Impairments						2.1
Leasehold Improvements | Hermetic Climate | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Asset Impairments						1.1
Retained Earnings | Accounting Standards Update 2018-02
Property, Plant and Equipment [Line Items]
Reclassification from AOCI to Retained Earnings					$ 4.6
Pension and Other Postretirement Plans | Retained Earnings | Accounting Standards Update 2018-02
Property, Plant and Equipment [Line Items]
Reclassification from AOCI to Retained Earnings						6.6
Designated As Hedging Instruments | Retained Earnings | Accounting Standards Update 2018-02
Property, Plant and Equipment [Line Items]
Reclassification from AOCI to Retained Earnings						2.0
Minimum | Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Right-of-use assets and lease liabilities						85.0
Maximum | Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Right-of-use assets and lease liabilities						$ 105.0
Other Expense | Accounting Standards Update 2017-07
Property, Plant and Equipment [Line Items]
Net periodic benefit income							0.5	0.2
Net periodic benefit cost (credit)							$ 1.5	$ 2.1