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Commitments and Contingent Liabilities Variable Interest Entities (Details) $ in Millions | Sep. 30, 2025 USD ($)
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Variable Interest Entity [Line Items] |
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] | Other Assets
Investment, Proportional Amortization Method, Elected, Amount | $ 432
Other Liabilities [Member] |
Variable Interest Entity [Line Items] |
Investment Program, Proportional Amortization Method, Elected, Commitment | $ 132

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