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Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Net Derivatives |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | $ (15) | $ (39) | $ 325
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | (5) | (459)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Balance at January 1, | (143) | (170) |
Total realized/unrealized gains (losses) included in net income (loss) | (23) | (39) | 238
Total realized/unrealized gains (losses) included in AOCI | (31) | (5) | (537)
Purchases | 0 | 0 |
Sales | 0 | 0 |
Issuances | 0 | 0 |
Settlements | 213 | 199 |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | (11) | (128) |
Balance at December 31, | 5 | (143) | (170)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (15) | (39) | 325
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | (5) | (459)
Net Embedded Derivatives |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 86 | (36) | 121
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Balance at January 1, | (93) | (17) |
Total realized/unrealized gains (losses) included in net income (loss) | 86 | (36) | 121
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 0 | 0 |
Sales | 0 | 0 |
Issuances | 0 | 0 |
Settlements | (2) | (40) |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | 0 | 0 |
Balance at December 31, | (9) | (93) | (17)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 86 | (36) | 121
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Corporate fixed maturity securities |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 28,345 | 24,401 |
Total realized/unrealized gains (losses) included in net income (loss) | (143) | (35) | (7)
Total realized/unrealized gains (losses) included in AOCI | (1,177) | 1,413 | (6,221)
Purchases | 5,587 | 4,896 |
Sales | (2,236) | (2,112) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 232 | 249 |
Transfers out of Level 3 | (4,103) | (467) |
Balance at December 31, | 26,505 | 28,345 | 24,401
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (82) | (10) | (3)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (1,189) | 1,371 | (6,136)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (82) | (10) | (3)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (1,189) | 1,371 | (6,136)
Foreign government |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 51 | 103 |
Total realized/unrealized gains (losses) included in net income (loss) | (1) | 2 | (38)
Total realized/unrealized gains (losses) included in AOCI | (2) | (3) | (13)
Purchases | 2 | 13 |
Sales | (1) | (12) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 0 | 4 |
Transfers out of Level 3 | (8) | (56) |
Balance at December 31, | 41 | 51 | 103
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (1) | 2 | (38)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (2) | (3) | (13)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (1) | 2 | (38)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (2) | (3) | (13)
Structured Securities |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 4,551 | 4,269 |
Total realized/unrealized gains (losses) included in net income (loss) | 34 | (11) | 29
Total realized/unrealized gains (losses) included in AOCI | 246 | 33 | (478)
Purchases | 3,014 | 757 |
Sales | (2,080) | (707) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 3,163 | 322 |
Transfers out of Level 3 | (289) | (112) |
Balance at December 31, | 8,639 | 4,551 | 4,269
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 40 | 10 | 27
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 209 | 14 | (450)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 40 | 10 | 27
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 209 | 14 | (450)
Municipals |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 0 | 0 |
Total realized/unrealized gains (losses) included in net income (loss) | 0 | 0 | 0
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 0 | 0 |
Sales | 0 | 0 |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 7 | 0 |
Transfers out of Level 3 | 0 | 0 |
Balance at December 31, | 7 | 0 | 0
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Equity Securities |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 249 | 259 |
Total realized/unrealized gains (losses) included in net income (loss) | (32) | 9 | 16
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 53 | 2 |
Sales | (34) | (21) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | 0 | 0 |
Balance at December 31, | 236 | 249 | 259
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (48) | 0 | 11
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (48) | 0 | 11
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Unit-linked and FVO Securities |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 1,103 | 787 |
Total realized/unrealized gains (losses) included in net income (loss) | 131 | 138 | (133)
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 141 | 205 |
Sales | (166) | (19) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 0 | 1 |
Transfers out of Level 3 | (19) | (9) |
Balance at December 31, | 1,190 | 1,103 | 787
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 135 | 136 | (131)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 135 | 136 | (131)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Short-term Investments |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 27 | 57 |
Total realized/unrealized gains (losses) included in net income (loss) | 0 | 0 | 0
Total realized/unrealized gains (losses) included in AOCI | (1) | 1 | 0
Purchases | 5 | 27 |
Sales | (26) | (48) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | 0 | (10) |
Balance at December 31, | 5 | 27 | 57
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Other Investments |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 975 | 926 |
Total realized/unrealized gains (losses) included in net income (loss) | 14 | 22 | 57
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 72 | 27 |
Sales | (282) | 0 |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 231 | 0 |
Transfers out of Level 3 | 0 | 0 |
Balance at December 31, | 1,010 | 975 | 926
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 13 | 23 | 56
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 13 | 23 | 56
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Separate Accounts (9) |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 1,147 | 1,210 |
Total realized/unrealized gains (losses) included in net income (loss) | (51) | (60) | 61
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 134 | 167 |
Sales | (226) | (180) |
Issuances | 0 | 0 |
Settlements | 0 | 1 |
Transfers into Level 3 | 0 | 13 |
Transfers out of Level 3 | (14) | (4) |
Balance at December 31, | 990 | 1,147 | 1,210
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | $ 0 | $ 0 | $ 0

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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 102 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-102 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 102 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-102 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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