ACQUISITIONS AND DIVESTITURES (Pro Forma Information) (Details) - Altra Merger Agreement - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Business Acquisition [Line Items]
Net Sales	$ 1,768.6	$ 1,847.5	$ 3,443.8	$ 3,657.7
Net Income Attributable to Regal Rexnord Corporation	$ 77.2	$ 69.8	$ 127.8	$ 13.7
Basic (in dollars per share)	$ 1.16	$ 1.05	$ 1.93	$ 0.20
Diluted (in dollars per share)	$ 1.16	$ 1.04	$ 1.92	$ 0.20