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Acquisitions and Discontinued Operations (Details) - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Feb. 25, 2021 | Mar. 31, 2021 | Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
AQN acquisition |  | $ 9 |
Discontinued Operations | Government Guaranteed Loans |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Loans included in divestiture |  | $ 675 | $ 710
Arbitria Quum Notitia, LLC |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
AQN acquisition | $ 9 |  |

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