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v3.23.1

Consolidated Statements Of Operations (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Financial Guarantee Insurance Segment [Member] |  |
Ceded premiums earned | $ 0 | $ 0

X
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |