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Schedule I - Condensed Financial Information of the Registrant - Promissory Notes (Details) - Parent Company - Reportable Legal Entities - USD ($) $ in Millions | Mar. 01, 2021 | Jan. 01, 2021 | Dec. 01, 2020 | Dec. 01, 2019 | Oct. 01, 2019
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NOTES TO CONDENSED FINANCIAL STATEMENTS |  |  |  |  |
Notes payable to subsidiary | $ 244.3 | $ 289.0 | $ 93.3 | $ 67.4 | $ 162.8
Stated interest rate (as a percent) | 0.12% | 0.14% | 0.15% | 1.61% | 1.69%

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