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Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended								12 Months Ended
Accounting Policies (Narrative) (Details) $ in Millions	Dec. 28, 2019 USD ($)	Sep. 28, 2019 USD ($)	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Dec. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 28, 2019 USD ($) segment	Dec. 29, 2018 USD ($) segment	Dec. 30, 2017 USD ($)	Dec. 30, 2018 USD ($)
Property, Plant and Equipment [Line Items]
Number of operating segments (in segment) \| segment									4	3
Amortization period	12 months								12 months
Research and development costs									$ 22.5	$ 29.3	$ 29.9
Impairment of long-lived assets									5.1	1.1
Goodwill	$ 1,501.3				$ 1,509.2				1,501.3	1,509.2	1,477.1
Net Sales	738.2	$ 772.3	$ 873.7	$ 853.8	881.7	$ 925.4	$ 959.7	$ 878.8	3,238.0	3,645.6	3,360.3
Business exit costs									0.0	0.0	3.9
Asset Impairments									10.0	8.7	0.0
Operating lease, right-of-use asset	71.0								71.0
Operating lease, liability	72.6								72.6
Power Transmission Solutions
Property, Plant and Equipment [Line Items]
Goodwill	572.7				579.7				572.7	579.7	585.9
Net Sales	191.8	$ 182.8	$ 204.0	$ 210.2	212.8	$ 207.7	$ 213.4	$ 204.9	788.8	838.8	765.4
Hermetic Climate
Property, Plant and Equipment [Line Items]
Net Sales									19.5	52.6
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Asset Impairments									5.1
Hermetic Climate
Property, Plant and Equipment [Line Items]
Net Sales									19.5	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									4.9	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
Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Operating lease, right-of-use asset												$ 93.0
Operating lease, liability												$ 93.0
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
Global Industrial Motors
Property, Plant and Equipment [Line Items]
Goodwill	122.3								122.3
Commercial Air Moving
Property, Plant and Equipment [Line Items]
Goodwill	38.3								38.3
Power Systems Switch
Property, Plant and Equipment [Line Items]
Goodwill	$ 15.6								$ 15.6