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Related Party Transactions - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items] |  |
Plus component of annual investment management fee | 0.25 |
Annual fee cap | 0.15 |
Asset Management Arrangement |  |
Related Party Transaction [Line Items] |  |
Related party fees | $ 5.3 | $ 3.5
Related party fees still due | 2.1 | 2.2
Management Consulting Agreement |  |
Related Party Transaction [Line Items] |  |
Related party fees | 5.0 | 4.4
Related party fees still due | 0.0 | 1.3
Beneficial owner |  |
Related Party Transaction [Line Items] |  |
Intercompany balance payable | $ 14.4 | $ 18.1
Maximum |  |
Related Party Transaction [Line Items] |  |
Percentage of consolidated group's net income due to Apollo Management | 1.00% |
Fees due to Apollo Management | $ 5.0 |

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