CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Income Statement [Abstract]
Net Sales	$ 892.7	$ 758.2	$ 2,593.7	$ 2,126.5
Cost of Sales	638.1	536.6	1,842.2	1,531.3
Gross Profit	254.6	221.6	751.5	595.2
Operating Expenses	144.4	131.6	432.9	385.1
Gain on Divestiture of Businesses	0.0	0.0	0.0	(0.1)
Asset Impairments	2.8	0.0	5.1	4.3
Total Operating Expenses	147.2	131.6	438.0	389.3
Income from Operations	107.4	90.0	313.5	205.9
Other Income, Net	(1.2)	(1.1)	(3.6)	(3.3)
Interest Expense	22.0	9.0	46.1	31.2
Interest Income	(2.3)	(1.3)	(5.5)	(3.8)
Income before Taxes	88.9	83.4	276.5	181.8
Provision for Income Taxes	17.8	17.1	57.2	39.5
Net Income	71.1	66.3	219.3	142.3
Less: Net Income Attributable to Noncontrolling Interests	1.6	1.3	4.6	3.4
Net Income Attributable to Regal Rexnord Corporation	$ 69.5	$ 65.0	$ 214.7	$ 138.9
Earnings Per Share Attributable to Regal Rexnord Corporation:
Basic (in dollars per share)	$ 1.71	$ 1.60	$ 5.28	$ 3.42
Assuming Dilution (in dollars per share)	$ 1.70	$ 1.60	$ 5.24	$ 3.41
Weighted Average Number of Shares Outstanding:
Basic (in shares)	40.7	40.6	40.7	40.6
Assuming Dilution (in shares)	41.0	40.8	41.0	40.7