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v3.25.1

Investments (Investments in Fixed Maturity and Equity Securities Available-for-Sale by Sector) (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | $ 89,709 |  | $ 82,907 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,348 |  | 1,201 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 6,447 |  | 6,393 |  |  |
Fixed maturity securities, available-for-sale | $ 84,507 | [1] | $ 77,617 | [2] |  |
% of Total | 100.00% |  | 100.00% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 103 |  | $ 98 |  | $ 95 | $ 75
Corporate Debt Securities [Member] |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 59,278 |  | 54,705 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 680 |  | 642 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 4,150 |  | 4,274 |  |  |
Fixed maturity securities, available-for-sale | $ 55,720 | [1] | $ 50,991 | [2] |  |
% of Total | 65.90% |  | 65.70% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 88 |  | $ 82 |  | 79 | 62
Canadian and Canadian provincial governments |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 4,604 |  | 4,655 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 440 |  | 412 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 48 |  | 51 |  |  |
Fixed maturity securities, available-for-sale | $ 4,996 | [1] | $ 5,016 | [2] |  |
% of Total | 5.90% |  | 6.50% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 |  | $ 0 |  |  |
Residential mortgage-backed securities |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 1,571 |  | 1,412 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 18 |  | 12 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 87 |  | 107 |  |  |
Fixed maturity securities, available-for-sale | $ 1,502 | [1] | $ 1,317 | [2] |  |
% of Total | 1.80% |  | 1.70% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 |  | $ 0 |  |  |
Asset-backed Securities [Member] |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 5,666 |  | 5,197 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 44 |  | 42 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 175 |  | 184 |  |  |
Fixed maturity securities, available-for-sale | $ 5,520 | [1] | $ 5,040 | [2] |  |
% of Total | 6.50% |  | 6.50% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 15 |  | $ 15 |  | 15 | 12
Commercial Mortgage Backed Securities [Member] |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 2,334 |  | 2,344 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 20 |  | 22 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 87 |  | 98 |  |  |
Fixed maturity securities, available-for-sale | $ 2,267 | [1] | $ 2,267 | [2] |  |
% of Total | 2.70% |  | 2.90% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 |  | $ 1 |  | $ 1 | $ 1
US Treasury and Government [Member] |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 2,191 |  | 2,734 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 20 |  | 11 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 248 |  | 281 |  |  |
Fixed maturity securities, available-for-sale | $ 1,963 | [1] | $ 2,464 | [2] |  |
% of Total | 2.30% |  | 3.20% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 |  | $ 0 |  |  |
US States and Political Subdivisions Debt Securities [Member] |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 805 |  | 789 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 3 |  | 3 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 86 |  | 99 |  |  |
Fixed maturity securities, available-for-sale | $ 722 | [1] | $ 693 | [2] |  |
% of Total | 0.90% |  | 0.90% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 |  | $ 0 |  |  |
Debt Security, Government, Non-US [Member] |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 6,053 |  | 5,752 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 94 |  | 56 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 435 |  | 424 |  |  |
Fixed maturity securities, available-for-sale | $ 5,712 | [1] | $ 5,384 | [2] |  |
% of Total | 6.80% |  | 6.90% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 |  | $ 0 |  |  |
JAPAN |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available for Sale at Fair value - Amortized cost | 7,207 |  | 5,319 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 29 |  | 1 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 1,131 |  | 875 |  |  |
Fixed maturity securities, available-for-sale | $ 6,105 |  | $ 4,445 |  |  |
% of Total | 7.20% |  | 5.70% |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 |  | $ 0 |  |  |
[1] | Excludes limited partnerships that are measured at estimated fair value using the NAV per share (or its equivalent) as a practical expedient. As of March 31, 2025, the fair value of such investments was $963 million.
[2] | Excludes limited partnerships that are measured at estimated fair value using the NAV per share (or its equivalent) as a practical expedient. As of December 31, 2024, the fair value of such investments was $966 million

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