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Derivative Financial Instruments - Gains and losses from valuation and settlements reported on derivatives not designated as accounting hedges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | $ 43 | $ (18) | $ 81 | $ 60
Realized capital gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 46 | (30) | 54 | 62
Operating costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | (3) | 12 | 27 | (2)
Interest rate contracts |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 18 | (1) | 19 | 35
Interest rate contracts | Realized capital gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 18 | (1) | 19 | 35
Interest rate contracts | Operating costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 0 | 0 | 0 | 0
Equity and index contracts |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 7 | 0 | 29 | 16
Equity and index contracts | Realized capital gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 10 | (12) | 2 | 18
Equity and index contracts | Operating costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | (3) | 12 | 27 | (2)
Foreign currency contracts |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 15 | (15) | 23 | 6
Foreign currency contracts | Realized capital gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 15 | (15) | 23 | 6
Foreign currency contracts | Operating costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 0 | 0 | 0 | 0
Credit default contracts |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 1 | (3) | 6 | 0
Credit default contracts | Realized capital gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 1 | (3) | 6 | 0
Credit default contracts | Operating costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 0 | 0 | 0 | 0
Total return swaps - fixed income |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 2 | 2 | 4 | 0
Total return swaps - fixed income | Realized capital gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | 2 | 2 | 4 | 0
Total return swaps - fixed income | Operating costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives | $ 0 | 0 | $ 0 | 0
Total return swaps - equity index |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives |  | (1) |  | 3
Total return swaps - equity index | Realized capital gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives |  | (1) |  | 3
Total return swaps - equity index | Operating costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Derivatives not designated as accounting hedging instruments, total gain (loss) recognized in net income on derivatives |  | $ 0 |  | $ 0

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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