Restructuring and other strategic initiatives - Restructuring Costs by Segment (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 28, 2020	Mar. 30, 2019
Restructuring Cost and Reserve
Restructuring expenses	$ 1.9	$ 3.3
Power Transmission
Restructuring Cost and Reserve
Restructuring expenses	0.2	2.9
Fluid Power
Restructuring Cost and Reserve
Restructuring expenses	$ 1.7	$ 0.4

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration