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Basis Of Presentation Basis of Presentation (Narrative) (Details) $ in Millions				12 Months Ended
	Dec. 17, 2020 USD ($)	Aug. 01, 2019 USD ($)	Jul. 02, 2018 USD ($)	Dec. 31, 2020	Dec. 31, 2020 USD ($)	Dec. 31, 2020 segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Number of operating segments				3		3
Cost of acquisitions, net of cash acquired					$ 339.4		$ 41.3	$ 38.0
PowerA
Business Acquisition [Line Items]
Purchase price, net of working capital adjustment	$ 340.0
Contingent consideration amount	$ 55.0
Foroni Acquisition
Business Acquisition [Line Items]
Purchase price, net of working capital adjustment		$ 41.5
Cost of acquisitions, net of cash acquired		41.5
Debt		$ 7.6
GOBA Acquisition
Business Acquisition [Line Items]
Purchase price, net of working capital adjustment			$ 39.1
Cost of acquisitions, net of cash acquired			$ 37.2

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The amounts of payments or accrued related to the acquisition of a business, gross less working capital adjustments

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of long-term debt due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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