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.

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684

+ Details

Name:	us-gaap_GainLossOnSaleOfBusiness
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rbc_RegalDriveTechnologiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rbc_VelvetDriveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rbc_CapComMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rbc_VaporRecoveryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

HELD FOR SALE, DIVESTITURES AND ACQUISITIONS (Divestitures) (Details) - USD ($) $ in Millions				3 Months Ended
	Jul. 01, 2019	Apr. 01, 2019	Jan. 07, 2019	Mar. 28, 2020	Mar. 30, 2019
Business Acquisition [Line Items]
Proceeds from divestiture of businesses				$ 0.3	$ 119.4
Gain (loss) on divestiture of businesses				0.1	$ 41.2
Regal Drive Technologies
Business Acquisition [Line Items]
Proceeds from divestiture of businesses			$ 119.9	0.3
Gain (loss) on divestiture of businesses			$ 41.0	$ 0.1
Velvet Drive
Business Acquisition [Line Items]
Proceeds from divestiture of businesses		$ 8.9
Gain (loss) on divestiture of businesses		(0.5)
CapCom
Business Acquisition [Line Items]
Proceeds from divestiture of businesses		9.9
Gain (loss) on divestiture of businesses		$ 6.0
Vapor Recovery
Business Acquisition [Line Items]
Proceeds from divestiture of businesses	$ 19.2
Gain (loss) on divestiture of businesses	$ 1.9