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Fair Value of Financial Instruments - Schedule of Changes to Fair Value of Financial Instruments Level 3 (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Liabilities |  |
Liabilities, Total (Losses) Gains Included in Earnings | $ (65) | $ 228
Liabilities, Total (Losses) Gains Included in AOCI | 1 | 0
Liabilities, Purchases | 256 | 336
Liabilities, Sales | 0 | 0
Liabilities, Settlements | (105) | (67)
Liabilities, Net transfer In (Out) of Level 3 | $ 0 | $ 0
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Recognized gains and losses, net | Recognized gains and losses, net
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] | Unrealized gain (loss) on investments and other financial instruments (excluding investments in unconsolidated affiliates) | Unrealized gain (loss) on investments and other financial instruments (excluding investments in unconsolidated affiliates)
Level 3 |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | $ 11,734 | $ 9,677
Balance at End of Period | 12,518 | 10,476
Liabilities |  |
Balance at Beginning of Period | 5,843 | 4,661
Balance at End of Period | 6,016 | 5,180
Indexed annuities/indexed universal life insurance ("IUL") embedded derivatives, included in Contractholder funds |  |
Liabilities |  |
Balance at Beginning of Period | 5,220 | 4,258
Liabilities, Total (Losses) Gains Included in Earnings | (67) | 200
Liabilities, Total (Losses) Gains Included in AOCI | 0 | 0
Liabilities, Purchases | 256 | 288
Liabilities, Sales | 0 | 0
Liabilities, Settlements | (93) | (67)
Liabilities, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 5,316 | 4,679
Change in Unrealized Gains (Losses) Included in OCI | 0 | 0
Interest rate swaps |  |
Liabilities |  |
Balance at Beginning of Period | 0 | 0
Liabilities, Total (Losses) Gains Included in Earnings | 0 | 19
Liabilities, Total (Losses) Gains Included in AOCI | 1 | 0
Liabilities, Purchases | 0 | 0
Liabilities, Sales | 0 | 0
Liabilities, Settlements | 0 | 0
Liabilities, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 1 | 19
Change in Unrealized Gains (Losses) Included in OCI | (1) |
Contingent consideration |  |
Liabilities |  |
Balance at Beginning of Period | 74 | 0
Liabilities, Total (Losses) Gains Included in Earnings | 2 | 9
Liabilities, Total (Losses) Gains Included in AOCI | 0 | 0
Liabilities, Purchases | 0 | 48
Liabilities, Sales | 0 | 0
Liabilities, Settlements | (12) | 0
Liabilities, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 64 | 57
Change in Unrealized Gains (Losses) Included in OCI | 0 | 0
Asset-backed securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 8,143 | 7,122
Assets, Total (Losses) Gains Included in Earnings | 1 | (12)
Assets, Total (Losses) Gains Included in AOCI | 3 | 104
Assets, Purchases | 1,029 | 762
Assets, Sales | (143) | (19)
Assets, Settlements | (185) | (202)
Assets, Net transfer In (Out) of Level 3 | 0 | (19)
Balance at End of Period | 8,848 | 7,736
Change in Unrealized Included in OCI | 2 | 104
Commercial mortgage-backed securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 0 | 18
Assets, Total (Losses) Gains Included in Earnings | 0 | 0
Assets, Total (Losses) Gains Included in AOCI | 0 | 0
Assets, Purchases | 0 | 1
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | (7)
Balance at End of Period | 0 | 12
Change in Unrealized Included in OCI | 0 | 0
Corporates |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 2,957 | 1,979
Assets, Total (Losses) Gains Included in Earnings | (13) | 0
Assets, Total (Losses) Gains Included in AOCI | 34 | 13
Assets, Purchases | 353 | 217
Assets, Sales | (314) | (3)
Assets, Settlements | (11) | (22)
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 3,006 | 2,184
Change in Unrealized Included in OCI | 33 | 13
Hybrids |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 0 |
Assets, Total (Losses) Gains Included in Earnings | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 |
Assets, Purchases | 6 |
Assets, Sales | 0 |
Assets, Settlements | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 |
Balance at End of Period | 6 |
Change in Unrealized Included in OCI | 0 |
Municipals |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 0 | 49
Assets, Total (Losses) Gains Included in Earnings | 0 | 0
Assets, Total (Losses) Gains Included in AOCI | 0 | 1
Assets, Purchases | 4 | 0
Assets, Sales | 0 | (32)
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 4 | 18
Change in Unrealized Included in OCI | 0 | 1
Residential mortgage-backed securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 3 | 3
Assets, Total (Losses) Gains Included in Earnings | 0 | 0
Assets, Total (Losses) Gains Included in AOCI | 0 | 0
Assets, Purchases | 0 | 1
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 3 | 4
Change in Unrealized Included in OCI | 0 | 0
Foreign Governments |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 4 | 16
Assets, Total (Losses) Gains Included in Earnings | 0 | 0
Assets, Total (Losses) Gains Included in AOCI | 0 | 0
Assets, Purchases | 19 | 0
Assets, Sales | 0 | 0
Assets, Settlements | 0 | (11)
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 23 | 5
Change in Unrealized Included in OCI | 0 | 0
Preferred securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 8 | 8
Assets, Total (Losses) Gains Included in Earnings | (1) | 0
Assets, Total (Losses) Gains Included in AOCI | 1 | 0
Assets, Purchases | 0 | 0
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 8 | 8
Change in Unrealized Included in OCI | 0 | 0
Equity securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 10 | 15
Assets, Total (Losses) Gains Included in Earnings | 0 | (1)
Assets, Total (Losses) Gains Included in AOCI | 0 | 0
Assets, Purchases | 0 | 0
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 10 | 14
Change in Unrealized Included in OCI | 0 | 0
Interest rate swaps |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period |  | 57
Assets, Total (Losses) Gains Included in Earnings |  | (48)
Assets, Total (Losses) Gains Included in AOCI |  | 0
Assets, Purchases |  | 0
Assets, Sales |  | 0
Assets, Settlements |  | 0
Assets, Net transfer In (Out) of Level 3 |  | 0
Balance at End of Period |  | 9
Change in Unrealized Included in OCI |  | 0
Interest rate swaps |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 3 |
Assets, Total (Losses) Gains Included in Earnings | 0 |
Assets, Total (Losses) Gains Included in AOCI | (2) |
Assets, Purchases | 0 |
Assets, Sales | 0 |
Assets, Settlements | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 |
Balance at End of Period | 1 |
Change in Unrealized Included in OCI | (2) |
Investment in unconsolidated affiliates |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 272 | 285
Assets, Total (Losses) Gains Included in Earnings | 0 | 58
Assets, Total (Losses) Gains Included in AOCI | 0 | 0
Assets, Purchases | 0 | 0
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 272 | 343
Change in Unrealized Included in OCI | 0 | 0
Short term investments |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 37 | 0
Assets, Total (Losses) Gains Included in Earnings | 0 | 0
Assets, Total (Losses) Gains Included in AOCI | 0 | 0
Assets, Purchases | 3 | 9
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 40 | 9
Change in Unrealized Included in OCI | 0 | 0
Available-for-sale embedded derivative |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 32 | 27
Assets, Total (Losses) Gains Included in Earnings | 0 | 0
Assets, Total (Losses) Gains Included in AOCI | 0 | 3
Assets, Purchases | 0 | 0
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 32 | 30
Change in Unrealized Included in OCI | 0 | 3
Credit linked note |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 0 | 10
Assets, Total (Losses) Gains Included in Earnings | 0 | 0
Assets, Total (Losses) Gains Included in AOCI | 0 | 0
Assets, Purchases | 0 | 0
Assets, Sales | 0 | 0
Assets, Settlements | 0 | (1)
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 0 | 9
Change in Unrealized Included in OCI | 0 | 0
Loan receivable |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 11 |
Assets, Total (Losses) Gains Included in Earnings | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 |
Assets, Purchases | 0 |
Assets, Sales | 0 |
Assets, Settlements | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 |
Balance at End of Period | 11 |
Change in Unrealized Included in OCI | 0 |
Other assets |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 65 |
Assets, Total (Losses) Gains Included in Earnings | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 |
Assets, Purchases | 2 |
Assets, Sales | 0 |
Assets, Settlements | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 |
Balance at End of Period | 67 |
Change in Unrealized Included in OCI | 0 |
Subtotal Level 3 assets at fair value | Level 3 |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 11,545 | 9,589
Assets, Total (Losses) Gains Included in Earnings | (13) | (3)
Assets, Total (Losses) Gains Included in AOCI | 36 | 121
Assets, Purchases | 1,416 | 990
Assets, Sales | (457) | (54)
Assets, Settlements | (196) | (236)
Assets, Net transfer In (Out) of Level 3 | 0 | (26)
Balance at End of Period | 12,331 | 10,381
Change in Unrealized Included in OCI | 33 | 121
Market risk benefits asset | Level 3 |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 189 | 88
Balance at End of Period | 187 | 95
Subtotal Level 3 liabilities at fair value |  |
Liabilities |  |
Change in Unrealized Gains (Losses) Included in OCI | (1) | 0
Subtotal Level 3 liabilities at fair value | Level 3 |  |
Liabilities |  |
Balance at Beginning of Period | 5,294 | 4,258
Balance at End of Period | 5,381 | 4,755
Market risk benefits liability | Level 3 |  |
Liabilities |  |
Balance at Beginning of Period | 549 | 403
Balance at End of Period | $ 635 | $ 425

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- Definition Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) 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/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 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 gain (loss) recognized in income from liability 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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