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Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Residential mortgage loans - FVO |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | $ 0 | $ 127 |
Total realized/unrealized gains (losses) included in net income (loss) | 0 | (8) | $ (5)
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 0 | 0 |
Sales | 0 | (108) |
Issuances | 0 | 0 |
Settlements | 0 | (11) |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | 0 | 0 |
Balance at December 31, | 0 | 0 | 127
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0 | (10)
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 | (10)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 0 | 0 | 0
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 | (39) | 325 | (361)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (5) | (459) | (128)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |
Balance at January 1, | (170) | (152) |
Total realized/unrealized gains (losses) included in net income (loss) | (39) | 238 | (460)
Total realized/unrealized gains (losses) included in AOCI | (5) | (537) | (334)
Purchases | 0 | 82 |
Sales | 0 | 0 |
Issuances | 0 | (3) |
Settlements | 199 | 201 |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | (128) | 1 |
Balance at December 31, | (143) | (170) | (152)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (39) | 325 | (361)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (5) | (459) | (128)
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 | (36) | 121 | 55
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, | (17) | (222) |
Total realized/unrealized gains (losses) included in net income (loss) | (36) | 121 | 55
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 0 | 0 |
Sales | 0 | 0 |
Issuances | 0 | 0 |
Settlements | (40) | 84 |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | 0 | 0 |
Balance at December 31, | (93) | (17) | (222)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (36) | 121 | 55
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, | 24,401 | 25,435 |
Total realized/unrealized gains (losses) included in net income (loss) | (35) | (7) | (34)
Total realized/unrealized gains (losses) included in AOCI | 1,413 | (6,221) | (1,334)
Purchases | 4,896 | 5,273 |
Sales | (2,112) | (1,762) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 249 | 2,127 |
Transfers out of Level 3 | (467) | (444) |
Balance at December 31, | 28,345 | 24,401 | 25,435
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (10) | (3) | (5)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 1,371 | (6,136) | (1,293)
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 | (10) | (3) | (5)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 1,371 | (6,136) | (1,293)
Foreign government |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 103 | 91 |
Total realized/unrealized gains (losses) included in net income (loss) | 2 | (38) | 0
Total realized/unrealized gains (losses) included in AOCI | (3) | (13) | (2)
Purchases | 13 | 36 |
Sales | (12) | (9) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 4 | 46 |
Transfers out of Level 3 | (56) | (10) |
Balance at December 31, | 51 | 103 | 91
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 2 | (38) | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (3) | (13) | (2)
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 | 2 | (38) | 0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | (3) | (13) | (2)
Structured Securities |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 4,269 | 5,871 |
Total realized/unrealized gains (losses) included in net income (loss) | (11) | 29 | 46
Total realized/unrealized gains (losses) included in AOCI | 33 | (478) | (26)
Purchases | 757 | 967 |
Sales | (707) | (984) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 322 | 251 |
Transfers out of Level 3 | (112) | (1,387) |
Balance at December 31, | 4,551 | 4,269 | 5,871
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 10 | 27 | 42
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 14 | (450) | (24)
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 | 10 | 27 | 42
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period | 14 | (450) | (24)
Equity Securities |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1, | 259 | 151 |
Total realized/unrealized gains (losses) included in net income (loss) | 9 | 16 | 27
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 2 | 108 |
Sales | (21) | (14) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | 0 | (2) |
Balance at December 31, | 249 | 259 | 151
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 11 | 13
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 | 11 | 13
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, | 787 | 901 |
Total realized/unrealized gains (losses) included in net income (loss) | 138 | (133) | 101
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 205 | 28 |
Sales | (19) | (24) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 1 | 23 |
Transfers out of Level 3 | (9) | (8) |
Balance at December 31, | 1,103 | 787 | 901
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 136 | (131) | 101
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 | 136 | (131) | 101
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, | 57 | 3 |
Total realized/unrealized gains (losses) included in net income (loss) | 0 | 0 | 1
Total realized/unrealized gains (losses) included in AOCI | 1 | 0 | (3)
Purchases | 27 | 56 |
Sales | (48) | (2) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | (10) | 0 |
Balance at December 31, | 27 | 57 | 3
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, | 926 | 898 |
Total realized/unrealized gains (losses) included in net income (loss) | 22 | 57 | 94
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 27 | 246 |
Sales | 0 | (177) |
Issuances | 0 | 0 |
Settlements | 0 | 0 |
Transfers into Level 3 | 0 | 0 |
Transfers out of Level 3 | 0 | (98) |
Balance at December 31, | 975 | 926 | 898
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 23 | 56 | 89
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 | 23 | 56 | 89
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, | 1,210 | 2,131 |
Total realized/unrealized gains (losses) included in net income (loss) | (60) | 61 | 29
Total realized/unrealized gains (losses) included in AOCI | 0 | 0 | 0
Purchases | 167 | 202 |
Sales | (180) | (1,164) |
Issuances | 0 | (2) |
Settlements | 1 | 4 |
Transfers into Level 3 | 13 | 1 |
Transfers out of Level 3 | (4) | (23) |
Balance at December 31, | 1,147 | 1,210 | 2,131
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 other comprehensive income (OCI) from asset (liability) measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: 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 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/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/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/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 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/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/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 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 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 + 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 2 -Subparagraph (c)(1a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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- Definition Amount of issuances of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (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://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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- Definition Amount of purchases of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (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://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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- Definition Amount of sales of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (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://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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