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Derivative Financial Instruments - Summary of the volume and fair value positions of derivative instruments (Details) $ in Millions | Jun. 30, 2021 USD ($) contract | Dec. 31, 2020 USD ($) contract
--- | --- | ---
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | $ 2,580 | $ 2,009
Total liability derivatives, notional amount | 2,291 | 3,182
Total derivatives, notional amount | $ 4,871 | $ 5,191
Total asset derivatives, number of contracts | contract | 19,125 | 4,440
Total liability derivatives, number of contracts | contract | 19,291 | 4,108
Total derivatives, Number of contracts | contract | 38,416 | 8,548
Net amount on balance sheet | $ 228 | $ 206
Net amount on balance sheet | (624) | (655)
Total derivatives, fair value, net | (396) | (449)
Asset derivatives gross amount | 243 | 218
Liability derivatives, gross asset | 2 | 2
Asset derivatives, gross liability | (15) | (12)
Liability derivatives gross amount | (626) | (657)
Liabilities held for sale |  |
Derivatives, Fair Value |  |
Total liability derivatives, notional amount | $ 2,179 | $ 2,240
Total liability derivatives, number of contracts | contract | 2,525 | 2,737
Net amount on balance sheet | $ (601) | $ (630)
Liability derivatives, gross asset | 2 | 1
Liability derivatives gross amount | (603) | (631)
Assets held for sale |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | $ 221 | $ 158
Total asset derivatives, number of contracts | contract | 2,601 | 3,189
Net amount on balance sheet | $ 180 | $ 185
Asset derivatives gross amount | 182 | 189
Asset derivatives, gross liability | $ (2) | $ (4)
Futures | Other assets | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract | 280 | 290
Net amount on balance sheet | $ 0 | $ 0
Asset derivatives gross amount | 0 | 0
Asset derivatives, gross liability | $ 0 | $ 0
Futures | Other liabilities & accrued expenses | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total liability derivatives, number of contracts | contract | 1,073 | 705
Net amount on balance sheet | $ 0 | $ 0
Liability derivatives, gross asset | 0 | 0
Liability derivatives gross amount | $ 0 | $ 0
Options | Other investments | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract | 15,061 | 56
Net amount on balance sheet | $ 25 | $ 6
Asset derivatives gross amount | 25 | 6
Asset derivatives, gross liability | $ 0 | $ 0
Options | Other liabilities & accrued expenses | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total liability derivatives, number of contracts | contract | 15,000 |
Net amount on balance sheet | $ (13) |
Liability derivatives, gross asset | 0 |
Liability derivatives gross amount | $ (13) |
Futures | Other assets | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total asset derivatives, number of contracts | contract | 1,183 | 905
Net amount on balance sheet | $ 0 | $ 1
Asset derivatives gross amount | 0 | 1
Asset derivatives, gross liability | $ 0 | $ 0
Futures | Other liabilities & accrued expenses | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total liability derivatives, number of contracts | contract | 693 | 666
Net amount on balance sheet | $ 0 | $ 0
Liability derivatives, gross asset | 0 | 0
Liability derivatives gross amount | 0 | 0
Total return swap agreements – fixed income | Other investments |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 50 |
Net amount on balance sheet | 1 |
Asset derivatives gross amount | 1 |
Asset derivatives, gross liability | 0 |
Total return swap agreements – fixed income | Other liabilities & accrued expenses | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total liability derivatives, notional amount |  | 50
Net amount on balance sheet |  | 0
Liability derivatives, gross asset |  | 0
Liability derivatives gross amount |  | 0
Foreign currency forwards | Other investments | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 593 | 291
Net amount on balance sheet | 6 | 4
Asset derivatives gross amount | 16 | 9
Asset derivatives, gross liability | (10) | (5)
Foreign currency forwards | Other liabilities & accrued expenses | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total liability derivatives, notional amount | 10 | 250
Net amount on balance sheet | 0 | (9)
Liability derivatives, gross asset | 0 | 1
Liability derivatives gross amount | 0 | (10)
Other embedded derivative financial instruments | Other investments | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 750 | 750
Net amount on balance sheet | 0 | 0
Asset derivatives gross amount | 0 | 0
Asset derivatives, gross liability | 0 | 0
Credit default swaps – buying protection | Other investments | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 61 | 60
Net amount on balance sheet | (3) | (3)
Asset derivatives gross amount | 0 | 0
Asset derivatives, gross liability | (3) | (3)
Credit default swaps – buying protection | Other liabilities & accrued expenses | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total liability derivatives, notional amount | 102 | 638
Net amount on balance sheet | (10) | (16)
Liability derivatives, gross asset | 0 | 0
Liability derivatives gross amount | (10) | (16)
Credit default swaps – selling protection | Other investments | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total asset derivatives, notional amount | 905 | 750
Net amount on balance sheet | 19 | 13
Asset derivatives gross amount | 19 | 13
Asset derivatives, gross liability | $ 0 | 0
Credit default swaps – selling protection | Other liabilities & accrued expenses | Derivatives not designated as accounting hedging instruments |  |
Derivatives, Fair Value |  |
Total liability derivatives, notional amount |  | 4
Net amount on balance sheet |  | 0
Liability derivatives, gross asset |  | 0
Liability derivatives gross amount |  | $ 0

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