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Derivative Financial Instruments - Schedule of Volume and Fair Value Positions of Derivative Instruments (Details) - Derivatives not designated as accounting hedging instruments $ in Millions | Sep. 30, 2024 USD ($) contract | Dec. 31, 2023 USD ($) contract
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Derivatives, Fair Value |  |
Total asset derivatives, notional amount | $ 663 | $ 562
Total liability derivatives, notional amount | 262 | 325
Total derivatives, notional amount | $ 925 | $ 887
Total asset derivatives, number of contracts | contract | 4,565 | 21,816
Total liability derivatives, number of contracts | contract | 22,390 | 3,155
Total derivatives, Number of contracts | contract | 26,955 | 24,971
Net amount on balance sheet | $ 117 | $ 118
Net amount on balance sheet | (16) | (6)
Total derivatives, fair value, net | 101 | 112
Asset derivatives, gross asset | 126 | 123
Liability derivatives, gross asset | 0 | 1
Asset derivatives, gross liability | (9) | (5)
Liability derivatives gross liability | $ (16) | $ (7)
Interest rate contracts |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract | 3,520 | 20,479
Total liability derivatives, number of contracts | contract | 22,106 | 2,175
Net amount on balance sheet | $ 1 | $ 2
Net amount on balance sheet | (9) | (1)
Asset derivatives, gross asset | 1 | 2
Liability derivatives, gross asset | 0 | 0
Asset derivatives, gross liability | 0 | 0
Liability derivatives gross liability | $ (9) | $ (1)
Options |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract |  | 32
Net amount on balance sheet |  | $ 0
Asset derivatives, gross asset |  | 0
Asset derivatives, gross liability |  | $ 0
Futures |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract | 1,045 | 1,305
Total liability derivatives, number of contracts | contract | 284 | 980
Net amount on balance sheet | $ 1 | $ 1
Net amount on balance sheet | 0 | (1)
Asset derivatives, gross asset | 1 | 1
Liability derivatives, gross asset | 0 | 0
Asset derivatives, gross liability | 0 | 0
Liability derivatives gross liability | 0 | (1)
Foreign currency contracts |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 383 | 278
Total liability derivatives, notional amount | 262 | 306
Net amount on balance sheet | (8) | (2)
Net amount on balance sheet | (7) | (3)
Asset derivatives, gross asset | 1 | 2
Liability derivatives, gross asset | 0 | 1
Asset derivatives, gross liability | (9) | (4)
Liability derivatives gross liability | (7) | (4)
Contingent consideration |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 250 | 250
Net amount on balance sheet | 123 | 118
Asset derivatives, gross asset | 123 | 118
Asset derivatives, gross liability | 0 | 0
Credit default contracts |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 30 | 34
Total liability derivatives, notional amount |  | 19
Net amount on balance sheet | 0 | (1)
Net amount on balance sheet |  | (1)
Asset derivatives, gross asset | 0 | 0
Liability derivatives, gross asset |  | 0
Asset derivatives, gross liability | $ 0 | (1)
Liability derivatives gross liability |  | $ (1)

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