Held for Sale, Acquisitions and Divestitures (Altra Pro Forma Information) (Details) - Altra Merger Agreement - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Net Sales	$ 6,701.8	$ 7,163.4
Net Income Attributable to Regal Rexnord Corporation	$ 50.1	$ 131.1
Basic (in dollars per share)	$ 0.76	$ 1.97
Diluted (in dollars per share)	$ 0.75	$ 1.95
Transaction Costs and Other One Time Non Recurring Costs
Business Acquisition [Line Items]
Revenues	$ 102.6	$ 102.6
Inventory Valuation Adjustment
Business Acquisition [Line Items]
Revenues	$ 54.5	$ 54.5