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Derivative Instruments and Hedging Activities - Schedule of Fair Value Amounts of Derivative Instruments Reported on our Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
receivable position | $ 4 | $ 12
payable position | 0 | 4
Notional amount | 34,613 | 40,508
Credit derivative, maximum exposure, undiscounted |  | 10
Total derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 4 | 10
payable position | 0 | 0
Notional amount | 33,598 | 39,620
Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 2
payable position | 0 | 4
Notional amount | 1,015 | 888
Interest rate contracts | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 1
payable position | 0 | 0
Notional amount | 0 | 172
Swaps | Total derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 0
Notional amount | 27,257 | 33,300
Purchased options | Total derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 2
payable position | 0 | 0
Notional amount | 6,150 | 6,150
Forwards | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 0
Notional amount | 0 | 109
Written options | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 1
payable position | 0 | 0
Notional amount | 0 | 63
Foreign exchange contracts | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 1
payable position | 0 | 0
Notional amount | 35 | 47
Forwards | Total derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 4 | 8
payable position | 0 | 0
Notional amount | 191 | 170
Forwards | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 1
payable position | 0 | 0
Notional amount | 35 | 47
Total credit risk | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 4
Notional amount | 980 | 669
Credit-linked note derivatives | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 0
Notional amount | 980 | 669
Other credit derivatives | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | $ 0 | $ 4

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