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Investments in and Advances to Unconsolidated Affiliates - Mervyns I & II - Additional Information (Details) shares in Millions, $ in Millions | 9 Months Ended | 177 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) shares | Sep. 30, 2020 USD ($) shares
Mervyns II |  |
Schedule of Equity Method Investments [Line Items] |  |
Cost method investment, ownership percentage | 28.30% | 28.30%
Realized gain on investment | $ 23.2 |
Cost method investments effective ownership, shares | shares | 4.1 | 4.1
Cost method investments effective ownership interest | 1.00% | 1.00%
Unrealized gain on investment | $ 64.9 |
Albertson |  |
Schedule of Equity Method Investments [Line Items] |  |
Cost method investment, ownership percentage | 36.67% | 36.67%
Albertson | Mervyns II |  |
Schedule of Equity Method Investments [Line Items] |  |
Unrealized gain on investment | $ 7.9 |
Related party revenue |  | $ 110.0

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