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v3.19.3

Equity and Capital Equity and Capital - Common Units (Details) $ in Millions | 1 Months Ended
--- | ---
Sep. 30, 2019 USD ($) shares
Equity [Abstract] |
Issuance of exchangeable operating partnership, units | shares | 396,531
Issuance of operating partnership, value | $ | $ 25.9

X
- Definition Issuance of exchangeable operating partnership units. + References No definition available. + Details
Name: | reg_IssuanceOfExchangeableOperatingPartnershipUnits
Namespace Prefix: | reg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Issuance of operating partnership value. + References No definition available. + Details
Name: | reg_IssuanceOfOperatingPartnershipValue
Namespace Prefix: | reg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration