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Real Estate Investments - Additional Information (Details) - Kroger New Albany Center [Member] $ in Millions | Nov. 30, 2022 USD ($)
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Real Estate [Line Item] |
Percentage of equity interest acquired | 50.00%
Business acquisition gross purchase price | $ 9.0

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- Definition Business acquisition gross purchase price. + References No definition available. + Details
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Namespace Prefix: | reg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Percentage of Equity Interest Acquired + References No definition available. + Details
Name: | reg_PercentageOfEquityInterestAcquired
Namespace Prefix: | reg_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_KrogerNewAlbanyCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |