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Fair Value - Held to Maturity Investment Securities (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Carrying Value |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Held-to-maturity investment securities | $ 175 | $ 234
Fair Value |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Held-to-maturity investment securities | $ 175 | $ 231

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