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Litigation And Other Related Contingencies (Details) | May 06, 2019 | Apr. 30, 2021 USD ($) | Apr. 30, 2020 USD ($) | Sep. 30, 2016 loan | Sep. 28, 2012 loan | May 31, 2012 loan
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Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |  |
Accrued obligations under indemnifications | $ |  | $ 5,500,000 | $ 1,600,000 |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Original loans collateralized | loan |  |  |  |  |  | 7,500
Number of loans sold to the trust | loan |  |  |  |  | 96 |
Loans sold to trust, with claims of breach of contract and indemnity | loan |  |  |  | 649 |  |
U.S. clients |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Additional tax assessment limit per client | $ |  | 6,000 |  |  |  |
SCC |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Principal assets of SCC | $ |  | $ 270,000,000 |  |  |  |
Free File Litigation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Eligibility period prior to filing complaint | 4 years |  |  |  |  |

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