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Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
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Scheduled maturities of debt obligations [Abstract] |  |
Principal amount of consolidated debt obligations outstanding | $ 29,821.4 | $ 30,146.4
Litigation matters [Member] |  |
Loss Contingencies [Line Items] |  |
Litigation accruals on an undiscounted basis | $ 0.2 | $ 6.1

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