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Fair Value of Financial Instruments - Changes to Fair Value of Financial Instruments Level 3 (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Liabilities |  |  |  |
Liabilities, Total Gains (Losses) Included in Earnings | $ (41) | $ 197 | $ 187 | $ 582
Liabilities, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 0
Liabilities, Purchases | 333 | 93 | 669 | 189
Liabilities, Sales | 0 | 0 | 0 | 0
Liabilities, Settlements | (108) | (38) | (175) | (65)
Liabilities, Net transfer In (Out) of Level 3 | $ 0 | $ 0 | $ 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 | 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 (loss) gain on investments and other financial instruments (excluding investments in unconsolidated affiliates) | Unrealized (loss) gain on investments and other financial instruments (excluding investments in unconsolidated affiliates) | Unrealized (loss) gain on investments and other financial instruments (excluding investments in unconsolidated affiliates) | Unrealized (loss) gain on investments and other financial instruments (excluding investments in unconsolidated affiliates)
Level 3 |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | $ 10,476 | $ 8,229 | $ 9,677 | $ 8,286
Balance at End of Period | 11,068 | 8,759 | 11,068 | 8,759
Liabilities |  |  |  |
Balance at Beginning of Period | 5,180 | 3,893 | 4,661 | 3,397
Balance at End of Period | 5,398 | 4,134 | 5,398 | 4,134
Indexed annuities/indexed universal life insurance ("IUL") embedded derivatives, included in contractholder funds |  |  |  |
Liabilities |  |  |  |
Balance at Beginning of Period | 4,679 | 3,569 | 4,258 | 3,115
Liabilities, Total Gains (Losses) Included in Earnings | (56) | 197 | 144 | 582
Liabilities, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 0
Liabilities, Purchases | 333 | 93 | 621 | 189
Liabilities, Sales | 0 | 0 | 0 | 0
Liabilities, Settlements | (108) | (38) | (175) | (65)
Liabilities, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0
Balance at End of Period | 4,848 | 3,821 | 4,848 | 3,821
Change in Unrealized Gains (Losses) Included in OCI | 0 | 0 | 0 | 0
Interest rate swaps |  |  |  |
Liabilities |  |  |  |
Balance at Beginning of Period | 19 |  | 0 |
Liabilities, Total Gains (Losses) Included in Earnings | 9 |  | 28 |
Liabilities, Total Gains (Losses) Included in AOCI | 0 |  | 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 | 28 |  | 28 |
Change in Unrealized Gains (Losses) Included in OCI | 0 |  | 0 |
Contingent consideration |  |  |  |
Liabilities |  |  |  |
Balance at Beginning of Period | 57 |  | 0 |
Liabilities, Total Gains (Losses) Included in Earnings | 6 |  | 15 |
Liabilities, Total Gains (Losses) Included in AOCI | 0 |  | 0 |
Liabilities, Purchases | 0 |  | 48 |
Liabilities, Sales | 0 |  | 0 |
Liabilities, Settlements | 0 |  | 0 |
Liabilities, Net transfer In (Out) of Level 3 | 0 |  | 0 |
Balance at End of Period | 63 |  | 63 |
Change in Unrealized Gains (Losses) Included in OCI | 0 |  | 0 |
Asset-backed securities |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 7,736 | 6,300 | 7,122 | 6,263
Assets, Total Gains (Losses) Included in Earnings | 27 | (3) | 15 | (11)
Assets, Total Gains (Losses) Included in AOCI | 6 | 15 | 110 | 33
Assets, Purchases | 704 | 379 | 1,466 | 795
Assets, Sales | (60) | (15) | (79) | (98)
Assets, Settlements | (344) | (151) | (546) | (386)
Assets, Net transfer In (Out) of Level 3 | (27) | (15) | (46) | (86)
Balance at End of Period | 8,042 | 6,510 | 8,042 | 6,510
Change in Unrealized Included in OCI | 3 | 14 | 107 | 32
Commercial mortgage-backed securities |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 12 | 29 | 18 | 37
Assets, Total Gains (Losses) Included in Earnings | 0 | 0 | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 1
Assets, Purchases | 57 | 0 | 58 | 12
Assets, Sales | 0 | 0 | 0 | 0
Assets, Settlements | 0 | 0 | 0 | 0
Assets, Net transfer In (Out) of Level 3 | (54) | (12) | (61) | (33)
Balance at End of Period | 15 | 17 | 15 | 17
Change in Unrealized Included in OCI | 0 | 0 | 0 | 1
Corporates |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 2,184 | 1,544 | 1,979 | 1,440
Assets, Total Gains (Losses) Included in Earnings | 0 | 0 | 0 | (1)
Assets, Total Gains (Losses) Included in AOCI | 2 | (33) | 14 | (56)
Assets, Purchases | 303 | 127 | 520 | 261
Assets, Sales | (93) | 0 | (96) | (1)
Assets, Settlements | (20) | (14) | (42) | (19)
Assets, Net transfer In (Out) of Level 3 | (21) | 4 | (20) | 4
Balance at End of Period | 2,355 | 1,628 | 2,355 | 1,628
Change in Unrealized Included in OCI | 0 | (33) | 13 | (56)
Municipals |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 18 | 32 | 49 | 29
Assets, Total Gains (Losses) Included in Earnings | 0 | 0 | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 17 | 1 | 20
Assets, Purchases | 0 | 0 | 0 | 0
Assets, Sales | (18) | 0 | (50) | 0
Assets, Settlements | 0 | 0 | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0
Balance at End of Period | 0 | 49 | 0 | 49
Change in Unrealized Included in OCI | 0 | 17 | 1 | 20
Residential mortgage-backed securities |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 4 | 12 | 3 | 302
Assets, Total Gains (Losses) Included in Earnings | 0 | 0 | 0 | 1
Assets, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 8
Assets, Purchases | 0 | 24 | 1 | 32
Assets, Sales | 0 | 0 | 0 | 0
Assets, Settlements | 0 | 0 | 0 | (8)
Assets, Net transfer In (Out) of Level 3 | (1) | (8) | (1) | (307)
Balance at End of Period | 3 | 28 | 3 | 28
Change in Unrealized Included in OCI | 0 | 0 | 0 | 8
Foreign Governments |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 5 | 16 | 16 | 16
Assets, Total Gains (Losses) Included in Earnings | 0 | 0 | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 0
Assets, Purchases | 0 | 0 | 0 | 0
Assets, Sales | 0 | 0 | 0 | 0
Assets, Settlements | 0 | 0 | (11) | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0
Balance at End of Period | 5 | 16 | 5 | 16
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0
Preferred securities |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 8 | 1 | 8 | 1
Assets, Total Gains (Losses) Included in Earnings | 0 | 0 | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 0
Assets, Purchases | 0 | 0 | 0 | 0
Assets, Sales | 0 | 0 | 0 | 0
Assets, Settlements | 0 | 0 | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 6 | 0 | 6
Balance at End of Period | 8 | 7 | 8 | 7
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0
Equity securities |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 14 | 11 | 15 | 10
Assets, Total Gains (Losses) Included in Earnings | (1) | (1) | (2) | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 0
Assets, Purchases | 0 | 0 | 0 | 1
Assets, Sales | 0 | 0 | 0 | (1)
Assets, Settlements | 0 | 0 | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 4 | 0 | 4
Balance at End of Period | 13 | 14 | 13 | 14
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0
Interest rate swaps |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 9 |  | 57 |
Assets, Total Gains (Losses) Included in Earnings | (2) |  | (50) |
Assets, Total Gains (Losses) Included in AOCI | 1 |  | 1 |
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 | 1 |  | 1 |
Investment in unconsolidated affiliates |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 343 | 107 | 285 | 23
Assets, Total Gains (Losses) Included in Earnings | 15 | 0 | 73 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 0
Assets, Purchases | 0 | 90 | 0 | 174
Assets, Sales | 0 | 0 | 0 | 0
Assets, Settlements | 0 | 0 | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0
Balance at End of Period | 358 | 197 | 358 | 197
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0
Short term investments |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 9 | 23 | 0 | 0
Assets, Total Gains (Losses) Included in Earnings | 0 | 0 | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 0
Assets, Purchases | 62 | 103 | 71 | 126
Assets, Sales | 0 | 0 | 0 | 0
Assets, Settlements | 0 | 0 | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0
Balance at End of Period | 71 | 126 | 71 | 126
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0
Other assets |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 0 |  | 0 |
Assets, Total Gains (Losses) Included in Earnings | 0 |  | 0 |
Assets, Total Gains (Losses) Included in AOCI | 0 |  | 0 |
Assets, Purchases | 50 |  | 50 |
Assets, Sales | 0 |  | 0 |
Assets, Settlements | 0 |  | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 |  | 0 |
Balance at End of Period | 50 |  | 50 |
Change in Unrealized Included in OCI | 0 |  | 0 |
Available-for-sale embedded derivative |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 30 | 25 | 27 | 23
Assets, Total Gains (Losses) Included in Earnings | 0 | 0 | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 1 | 1 | 4 | 3
Assets, Purchases | 0 | 0 | 0 | 0
Assets, Sales | 0 | 0 | 0 | 0
Assets, Settlements | 0 | 0 | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0
Balance at End of Period | 31 | 26 | 31 | 26
Change in Unrealized Included in OCI | 1 | 1 | 4 | 3
Loan Participants |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period |  |  | 0 |
Assets, Total Gains (Losses) Included in Earnings |  |  | 0 |
Assets, Total Gains (Losses) 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 | 0 |  | 0 |
Credit linked note |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 9 | 13 | 10 | 15
Assets, Total Gains (Losses) Included in Earnings | 1 | 0 | 1 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0 | 0 | 0
Assets, Purchases | 0 | 0 | 0 | 0
Assets, Sales | 0 | 0 | 0 | 0
Assets, Settlements | (4) | 0 | (5) | (2)
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0
Balance at End of Period | 6 | 13 | 6 | 13
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0
Secured borrowing receivable |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period |  | 10 |  | 10
Assets, Total Gains (Losses) Included in Earnings |  | 0 |  | 0
Assets, Total Gains (Losses) 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 |  | 10
Change in Unrealized Included in OCI |  | 0 |  | 0
Subtotal Level 3 assets at fair value | Level 3 |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 10,381 | 8,123 | 9,589 | 8,169
Assets, Total Gains (Losses) Included in Earnings | 40 | (4) | 37 | (11)
Assets, Total Gains (Losses) Included in AOCI | 10 | 0 | 130 | 9
Assets, Purchases | 1,176 | 723 | 2,166 | 1,401
Assets, Sales | (171) | (15) | (225) | (100)
Assets, Settlements | (368) | (165) | (604) | (415)
Assets, Net transfer In (Out) of Level 3 | (103) | (21) | (128) | (412)
Balance at End of Period | 10,965 | 8,641 | 10,965 | 8,641
Change in Unrealized Included in OCI | 5 | (1) | 126 | 8
Market risk benefits asset | Level 3 |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |
Balance at Beginning of Period | 95 | 106 | 88 | 117
Balance at End of Period | 103 | 118 | 103 | 118
Subtotal Level 3 liabilities at fair value |  |  |  |
Liabilities |  |  |  |
Change in Unrealized Gains (Losses) Included in OCI | 0 | 0 | 0 | 0
Subtotal Level 3 liabilities at fair value | Level 3 |  |  |  |
Liabilities |  |  |  |
Balance at Beginning of Period | 4,755 | 3,569 | 4,258 | 3,115
Balance at End of Period | 4,939 | 3,821 | 4,939 | 3,821
Market risk benefits liability | Level 3 |  |  |  |
Liabilities |  |  |  |
Balance at Beginning of Period | 425 | 324 | 403 | 282
Balance at End of Period | $ 459 | $ 313 | $ 459 | $ 313

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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 settlement 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 (out of) level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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/2009/role/commonPracticeRef -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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