HELD FOR SALE, ACQUISITIONS AND DIVESTITURES (Altra Pro Forma Information) (Details) - Altra Merger Agreement $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2023 USD ($) $ / shares
Business Acquisition [Line Items]
Net Sales \| $	$ 1,675.2
Net Income Attributable to Regal Rexnord Corporation \| $	$ 37.6
Basic (in dollars per share) \| $ / shares	$ 0.57
Assuming Dilution (in dollars per share) \| $ / shares	$ 0.56

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

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