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Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets |  |
Policy loans | $ 8,800 | $ 8,788
Liabilities |  |
Collateral financing arrangement | 590 | 637
Junior subordinated debt securities | 3,162 | 3,161
Separate account liabilities | 141,003 | 144,634
Carrying Value |  |
Assets |  |
Mortgage loans (1) | 91,458 | 92,506
Policy loans | 8,800 | 8,788
Other invested assets | 1,237 | 919
Premiums, reinsurance and other receivables | 5,192 | 5,182
Other assets | 252 | 268
Liabilities |  |
Policyholder account balances | 138,419 | 138,233
Long-term debt | 15,946 | 15,516
Collateral financing arrangement | 590 | 637
Junior subordinated debt securities | 3,162 | 3,161
Other liabilities | 10,646 | 10,556
Separate account liabilities | 71,713 | 75,705
Estimated Fair Value |  |
Assets |  |
Mortgage loans (1) | 86,188 | 87,753
Policy loans | 9,443 | 9,516
Other invested assets | 1,237 | 919
Premiums, reinsurance and other receivables | 5,178 | 5,191
Other assets | 254 | 266
Liabilities |  |
Policyholder account balances | 133,040 | 134,025
Long-term debt | 15,658 | 15,621
Collateral financing arrangement | 510 | 551
Junior subordinated debt securities | 3,589 | 3,552
Other liabilities | 10,271 | 10,260
Separate account liabilities | 71,713 | 75,705
Estimated Fair Value | Level 1 |  |
Assets |  |
Mortgage loans (1) | 0 | 0
Policy loans | 0 | 0
Other invested assets | 0 | 0
Premiums, reinsurance and other receivables | 0 | 0
Other assets | 0 | 0
Liabilities |  |
Policyholder account balances | 0 | 0
Long-term debt | 0 | 0
Collateral financing arrangement | 0 | 0
Junior subordinated debt securities | 0 | 0
Other liabilities | 0 | 0
Separate account liabilities | 0 | 0
Estimated Fair Value | Level 2 |  |
Assets |  |
Mortgage loans (1) | 0 | 0
Policy loans | 0 | 0
Other invested assets | 714 | 714
Premiums, reinsurance and other receivables | 863 | 791
Other assets | 84 | 82
Liabilities |  |
Policyholder account balances | 0 | 0
Long-term debt | 15,658 | 15,621
Collateral financing arrangement | 0 | 0
Junior subordinated debt securities | 3,589 | 3,552
Other liabilities | 1,113 | 609
Separate account liabilities | 71,713 | 75,705
Estimated Fair Value | Level 3 |  |
Assets |  |
Mortgage loans (1) | 86,188 | 87,753
Policy loans | 9,443 | 9,516
Other invested assets | 523 | 205
Premiums, reinsurance and other receivables | 4,315 | 4,400
Other assets | 170 | 184
Liabilities |  |
Policyholder account balances | 133,040 | 134,025
Long-term debt | 0 | 0
Collateral financing arrangement | 510 | 551
Junior subordinated debt securities | 0 | 0
Other liabilities | 9,158 | 9,651
Separate account liabilities | $ 0 | $ 0

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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