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Securities, Federal Home Loan Bank Stock (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021
Federal Home Loan Bank Stock [Abstract] |  |  |  |
Impairment charges | $ 0 | $ 0 | $ 0 | $ 0
Federal Home Loan Bank Stock [Member] |  |  |  |
Federal Home Loan Bank Stock [Abstract] |  |  |  |
Impairment charges | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI https://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562 + Details
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