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v3.23.2

Fair value measurements (Carrying Values And Fair Values Of Financial Instruments Not Measured At Fair Value) (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value | $ 0 | $ 8,439
Debt Securities, Held-to-maturity |  | 8,882
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] |  |
Repurchase agreements | 1,518 | 1,419
Short-term debt | 699 | 475
Long-term debt | 13,782 | 14,402
Total liabilities | 152,573 | 148,498
Portion at Other than Fair Value Measurement | Level 1 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,299
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] |  |
Repurchase agreements | 0 | 0
Short-Term Debt, Fair Value | 0 | 0
Long-term Debt, Fair Value | 0 | 0
Trust preferred securities | 0 | 0
Total liabilities | 0 | 0
Portion at Other than Fair Value Measurement | Level 2 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 7,140
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] |  |
Repurchase agreements | 1,518 | 1,419
Short-Term Debt, Fair Value | 686 | 473
Long-term Debt, Fair Value | 12,133 | 12,495
Trust preferred securities | 369 | 383
Total liabilities | 14,706 | 14,770
Portion at Other than Fair Value Measurement | Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] |  |
Repurchase agreements | 0 | 0
Short-Term Debt, Fair Value | 0 | 0
Long-term Debt, Fair Value | 0 | 0
Trust preferred securities | 0 | 0
Total liabilities | 0 | 0
Portion at Other than Fair Value Measurement | Total Level 1, Level 2, and Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 8,439
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] |  |
Repurchase agreements | 1,518 | 1,419
Short-Term Debt, Fair Value | 686 | 473
Long-term Debt, Fair Value | 12,133 | 12,495
Trust preferred securities | 369 | 383
Total liabilities | 14,706 | 14,770
Reported Value Measurement [Member] |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Debt Securities, Held-to-maturity |  | 8,848
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] |  |
Repurchase agreements | 1,518 | 1,419
Short-term debt | 699 | 475
Long-term debt | 13,782 | 14,402
Trust preferred securities | 308 | 308
Total liabilities | $ 16,307 | 16,604
U.S. Treasury / Agency |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,370
Debt Securities, Held-to-maturity |  | 1,417
U.S. Treasury / Agency | Portion at Other than Fair Value Measurement | Level 1 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,299
U.S. Treasury / Agency | Portion at Other than Fair Value Measurement | Level 2 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 71
U.S. Treasury / Agency | Portion at Other than Fair Value Measurement | Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
U.S. Treasury / Agency | Portion at Other than Fair Value Measurement | Total Level 1, Level 2, and Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,370
U.S. Treasury / Agency | Reported Value Measurement [Member] |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Debt Securities, Held-to-maturity |  | 1,417
Non-U.S. |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,054
Debt Securities, Held-to-maturity |  | 1,140
Non-U.S. | Portion at Other than Fair Value Measurement | Level 1 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Non-U.S. | Portion at Other than Fair Value Measurement | Level 2 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,054
Non-U.S. | Portion at Other than Fair Value Measurement | Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Non-U.S. | Portion at Other than Fair Value Measurement | Total Level 1, Level 2, and Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,054
Non-U.S. | Reported Value Measurement [Member] |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Debt Securities, Held-to-maturity |  | 1,136
Corporate and asset-backed securities |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,580
Debt Securities, Held-to-maturity |  | 1,733
Corporate and asset-backed securities | Portion at Other than Fair Value Measurement | Level 1 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Corporate and asset-backed securities | Portion at Other than Fair Value Measurement | Level 2 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,580
Corporate and asset-backed securities | Portion at Other than Fair Value Measurement | Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Corporate and asset-backed securities | Portion at Other than Fair Value Measurement | Total Level 1, Level 2, and Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,580
Corporate and asset-backed securities | Reported Value Measurement [Member] |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Debt Securities, Held-to-maturity |  | 1,705
Mortgage-backed securities |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,351
Debt Securities, Held-to-maturity |  | 1,456
Mortgage-backed securities | Portion at Other than Fair Value Measurement | Level 1 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Mortgage-backed securities | Portion at Other than Fair Value Measurement | Level 2 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,351
Mortgage-backed securities | Portion at Other than Fair Value Measurement | Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Mortgage-backed securities | Portion at Other than Fair Value Measurement | Total Level 1, Level 2, and Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 1,351
Mortgage-backed securities | Reported Value Measurement [Member] |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Debt Securities, Held-to-maturity |  | 1,455
Municipal |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 3,084
Debt Securities, Held-to-maturity |  | 3,136
Municipal | Portion at Other than Fair Value Measurement | Level 1 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Municipal | Portion at Other than Fair Value Measurement | Level 2 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 3,084
Municipal | Portion at Other than Fair Value Measurement | Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 0
Municipal | Portion at Other than Fair Value Measurement | Total Level 1, Level 2, and Level 3 |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Fixed maturities, held-to-maturity, fair value |  | 3,084
Municipal | Reported Value Measurement [Member] |  |
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |  |
Debt Securities, Held-to-maturity |  | $ 3,135

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- Definition Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. + References Reference 1: 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 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -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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