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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 | Jun. 30, 2024 USD ($) contract | Dec. 31, 2023 USD ($) contract
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Derivatives, Fair Value |  |
Total asset derivatives, notional amount | $ 250 | $ 562
Total liability derivatives, notional amount | 646 | 325
Total derivatives, notional amount | $ 896 | $ 887
Total asset derivatives, number of contracts | contract | 4,758 | 21,816
Total liability derivatives, number of contracts | contract | 10,806 | 3,155
Total derivatives, Number of contracts | contract | 15,564 | 24,971
Net amount on balance sheet | $ 123 | $ 118
Net amount on balance sheet | 2 | (6)
Total derivatives, fair value, net | 125 | 112
Asset derivatives, gross asset | 123 | 123
Liability derivatives, gross asset | 7 | 1
Asset derivatives, gross liability | 0 | (5)
Liability derivatives gross liability | $ (5) | $ (7)
Interest rate contracts |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract | 3,538 | 20,479
Total liability derivatives, number of contracts | contract | 10,307 | 2,175
Net amount on balance sheet | $ 1 | $ 2
Net amount on balance sheet | (2) | (1)
Asset derivatives, gross asset | 1 | 2
Liability derivatives, gross asset | 0 | 0
Asset derivatives, gross liability | 0 | 0
Liability derivatives gross liability | $ (2) | $ (1)
Options |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract | 28 | 32
Total liability derivatives, number of contracts | contract | 17 |
Net amount on balance sheet | $ 0 | $ 0
Net amount on balance sheet | 0 |
Asset derivatives, gross asset | 0 | 0
Liability derivatives, gross asset | 0 |
Asset derivatives, gross liability | 0 | $ 0
Liability derivatives gross liability | $ 0 |
Futures |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract | 1,192 | 1,305
Total liability derivatives, number of contracts | contract | 482 | 980
Net amount on balance sheet | $ 1 | $ 1
Net amount on balance sheet | (1) | (1)
Asset derivatives, gross asset | 1 | 1
Liability derivatives, gross asset | 0 | 0
Asset derivatives, gross liability | 0 | 0
Liability derivatives gross liability | (1) | (1)
Foreign currency contracts |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount |  | 278
Total liability derivatives, notional amount | 616 | 306
Net amount on balance sheet |  | (2)
Net amount on balance sheet | 5 | (3)
Asset derivatives, gross asset |  | 2
Liability derivatives, gross asset | 7 | 1
Asset derivatives, gross liability |  | (4)
Liability derivatives gross liability | (2) | (4)
Contingent consideration |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 250 | 250
Net amount on balance sheet | 121 | 118
Asset derivatives, gross asset | 121 | 118
Asset derivatives, gross liability | 0 | 0
Credit default contracts |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount |  | 34
Total liability derivatives, notional amount | 30 | 19
Net amount on balance sheet |  | (1)
Net amount on balance sheet | 0 | (1)
Asset derivatives, gross asset |  | 0
Liability derivatives, gross asset | 0 | 0
Asset derivatives, gross liability |  | (1)
Liability derivatives gross liability | $ 0 | $ (1)

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