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Fair Value Measurements (excluding Consolidated Investment Entities) - Fair Value Measurement (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets held in separate accounts | $ 99,147 | $ 93,133
Total assets | 161,280 | 157,085
Derivatives | 316 | 371
Total liabilities | 155,411 | 151,032
Fixed maturities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 27,472 | 28,611
U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 349 | 403
U.S. Government agencies and authorities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 54 | 56
State, municipalities and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 630 | 771
U.S. corporate public securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 7,137 | 7,666
U.S. corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 4,696 | 4,760
Foreign corporate public securities and foreign governments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,520 | 2,702
Foreign corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,660 | 2,812
Residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 3,378 | 3,476
Commercial mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 3,388 | 3,495
Other asset-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,660 | 2,470
Measured at fair value on a recurring basis |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreements | 2,194 | 2,165
Assets held in separate accounts | 99,147 | 93,133
Total assets | 129,431 | 124,517
Contingent consideration | 49 | 51
Total liabilities | 421 | 480
Measured at fair value on a recurring basis | Stabilizer and MCGs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Guaranteed benefit derivatives | 10 | 9
Measured at fair value on a recurring basis | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 269 | 270
Derivatives | 308 | 354
Measured at fair value on a recurring basis | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 43 | 37
Derivatives | 3 | 13
Measured at fair value on a recurring basis | Equity contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 4 | 4
Derivatives | 3 | 2
Measured at fair value on a recurring basis | Embedded derivative on reinsurance |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 62 | 61
Embedded derivative on reinsurance | 46 | 49
Measured at fair value on a recurring basis | Credit contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 2 | 2
Measured at fair value on a recurring basis | Fixed maturities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 27,472 | 28,611
Measured at fair value on a recurring basis | U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 349 | 403
Measured at fair value on a recurring basis | U.S. Government agencies and authorities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 54 | 56
Measured at fair value on a recurring basis | State, municipalities and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 630 | 771
Measured at fair value on a recurring basis | U.S. corporate public securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 7,137 | 7,666
Measured at fair value on a recurring basis | U.S. corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 4,696 | 4,760
Measured at fair value on a recurring basis | Foreign corporate public securities and foreign governments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,520 | 2,702
Measured at fair value on a recurring basis | Foreign corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,660 | 2,812
Measured at fair value on a recurring basis | Residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 3,378 | 3,476
Measured at fair value on a recurring basis | Commercial mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 3,388 | 3,495
Measured at fair value on a recurring basis | Other asset-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,660 | 2,470
Measured at fair value on a recurring basis | Equity securities, at fair value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 240 | 236
Measured at fair value on a recurring basis | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreements | 2,180 | 2,148
Assets held in separate accounts | 93,081 | 87,180
Total assets | 95,678 | 89,821
Contingent consideration | 0 | 0
Total liabilities | 3 | 0
Measured at fair value on a recurring basis | Level 1 | Stabilizer and MCGs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Guaranteed benefit derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 7
Derivatives | 3 | 0
Measured at fair value on a recurring basis | Level 1 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Equity contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Embedded derivative on reinsurance |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Embedded derivative on reinsurance | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Credit contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Fixed maturities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 275 | 346
Measured at fair value on a recurring basis | Level 1 | U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 275 | 346
Measured at fair value on a recurring basis | Level 1 | U.S. Government agencies and authorities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | State, municipalities and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | U.S. corporate public securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | U.S. corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Foreign corporate public securities and foreign governments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Foreign corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Commercial mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Other asset-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 1 | Equity securities, at fair value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 142 | 140
Measured at fair value on a recurring basis | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreements | 14 | 17
Assets held in separate accounts | 5,703 | 5,605
Total assets | 31,282 | 32,162
Contingent consideration | 0 | 0
Total liabilities | 302 | 362
Measured at fair value on a recurring basis | Level 2 | Stabilizer and MCGs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Guaranteed benefit derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 2 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 269 | 263
Derivatives | 305 | 354
Measured at fair value on a recurring basis | Level 2 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 43 | 37
Derivatives | 3 | 13
Measured at fair value on a recurring basis | Level 2 | Equity contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 4 | 4
Derivatives | 3 | 2
Measured at fair value on a recurring basis | Level 2 | Embedded derivative on reinsurance |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 62 | 61
Embedded derivative on reinsurance | (11) | (9)
Measured at fair value on a recurring basis | Level 2 | Credit contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 2 | 2
Measured at fair value on a recurring basis | Level 2 | Fixed maturities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 25,187 | 26,175
Measured at fair value on a recurring basis | Level 2 | U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 74 | 57
Measured at fair value on a recurring basis | Level 2 | U.S. Government agencies and authorities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 54 | 55
Measured at fair value on a recurring basis | Level 2 | State, municipalities and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 630 | 771
Measured at fair value on a recurring basis | Level 2 | U.S. corporate public securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 7,125 | 7,648
Measured at fair value on a recurring basis | Level 2 | U.S. corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 3,232 | 3,234
Measured at fair value on a recurring basis | Level 2 | Foreign corporate public securities and foreign governments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,503 | 2,702
Measured at fair value on a recurring basis | Level 2 | Foreign corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,216 | 2,376
Measured at fair value on a recurring basis | Level 2 | Residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 3,329 | 3,419
Measured at fair value on a recurring basis | Level 2 | Commercial mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 3,388 | 3,495
Measured at fair value on a recurring basis | Level 2 | Other asset-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,636 | 2,418
Measured at fair value on a recurring basis | Level 2 | Equity securities, at fair value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 0 | 0
Measured at fair value on a recurring basis | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreements | 0 | 0
Assets held in separate accounts | 363 | 348
Total assets | 2,471 | 2,534
Contingent consideration | 49 | 51
Total liabilities | 116 | 118
Measured at fair value on a recurring basis | Level 3 | Stabilizer and MCGs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Guaranteed benefit derivatives | 10 | 9
Measured at fair value on a recurring basis | Level 3 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 3 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 3 | Equity contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 3 | Embedded derivative on reinsurance |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Embedded derivative on reinsurance | 57 | 58
Measured at fair value on a recurring basis | Level 3 | Credit contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivatives | 0 | 0
Measured at fair value on a recurring basis | Level 3 | Fixed maturities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 2,010 | 2,090
Measured at fair value on a recurring basis | Level 3 | U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 3 | U.S. Government agencies and authorities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 1
Measured at fair value on a recurring basis | Level 3 | State, municipalities and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 3 | U.S. corporate public securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 12 | 18
Measured at fair value on a recurring basis | Level 3 | U.S. corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 1,464 | 1,526
Measured at fair value on a recurring basis | Level 3 | Foreign corporate public securities and foreign governments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 17 | 0
Measured at fair value on a recurring basis | Level 3 | Foreign corporate private securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 444 | 436
Measured at fair value on a recurring basis | Level 3 | Residential mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 49 | 57
Measured at fair value on a recurring basis | Level 3 | Commercial mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 0 | 0
Measured at fair value on a recurring basis | Level 3 | Other asset-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed maturities, including securities pledged | 24 | 52
Measured at fair value on a recurring basis | Level 3 | Equity securities, at fair value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | $ 98 | $ 96

X
- Definition Amount of liability recognized from contingent consideration in asset acquisition. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 50 -Name Accounting Standards Codification -Section 15 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480123/805-50-15-3 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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