ACQUISITIONS AND DIVESTITURES (Altra Pro Forma Information) (Details) - Altra Merger Agreement - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Business Acquisition [Line Items]
Net Sales	$ 1,786.6	$ 3,443.8
Net Income Attributable to Regal Rexnord Corporation	$ 77.2	$ 127.8
Basic (in dollars per share)	$ 1.16	$ 1.93
Assuming Dilution (in dollars per share)	$ 1.16	$ 1.92