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Term Borrowings - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |
Loss on debt extinguishment | $ (26) | $ 0 | $ 0
Junior Subordinated Debt |  |  |
Debt Instrument [Line Items] |  |  |
Debt term | 30 years |  |
Debt redeemed | $ 94 |  |
Loss on debt extinguishment | $ (26) |  |

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