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Real Estate Investments - Schedule of Business Acquisitions (Parenthetical) (Details) - USD ($) | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Business Acquisition [Line Items] |  |
Percentage of purchase price and allocation | 100.00% | 100.00%
Percentage of purchase price of property | 25.00% | 20.00%
RegCal, LLC [Member] |  |
Business Acquisition [Line Items] |  |
Business acquisition gross purchase price | $ 93,200,000 |
Percentage of equity interest acquired | 25.00% |
US Regency Retail I, LLC [Member] |  |
Business Acquisition [Line Items] |  |
Business acquisition gross purchase price |  | $ 192,900

X
- Definition Business acquisition gross purchase price. + References No definition available. + Details
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Period Type: | duration

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

X
- Definition Percentage of purchase price and allocation. + References No definition available. + Details
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Namespace Prefix: | reg_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage of Purchase Price of Property + References No definition available. + Details
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Namespace Prefix: | reg_
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Balance Type: | na
Period Type: | instant

X
- 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
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Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |