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Employee Benefit Plans (Pension and Post Retirement Asset Allocations in Accordance with Investment Guidelines) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Notional | $ 487,415 | $ 460,804 |
Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 12,649 | 12,519 | $ 15,242
Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 4,777 | 4,784 |
Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 3,637 | 3,168 |
Pension Benefits | Net assets in the fair value hierarchy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 9,356 | 8,956 |
Postretirement |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 1,186 | 1,191 | 1,621
Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 39 | 32 |
Postretirement | Defined Benefit Plan, Debt Security |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 8 | 11 |
Postretirement | Net assets in the fair value hierarchy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 87 | 93 |
Postretirement | Variable Life Insurance Policies at contract value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 937 | 909 |
Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 193 | 82 |
Level 1 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 1 | Pension Benefits | Net assets in the fair value hierarchy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 193 | 82 |
Level 1 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 1 | Postretirement | Defined Benefit Plan, Debt Security |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 1 | Postretirement | Net assets in the fair value hierarchy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 40 | 50 |
Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 4,493 | 4,637 |
Level 2 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 2 | Pension Benefits | Net assets in the fair value hierarchy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 4,493 | 4,637 |
Level 2 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 39 | 32 |
Level 2 | Postretirement | Defined Benefit Plan, Debt Security |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 8 | 11 |
Level 2 | Postretirement | Net assets in the fair value hierarchy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 47 | 43 |
Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 91 | 65 |
Level 3 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 3,637 | 3,168 |
Level 3 | Pension Benefits | Net assets in the fair value hierarchy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 4,670 | 4,237 |
Level 3 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 3 | Postretirement | Defined Benefit Plan, Debt Security |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 3 | Postretirement | Net assets in the fair value hierarchy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Investment Measure at Net Asset Value as a practical expedient | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 2,249 | 2,020 |
Investment Measure at Net Asset Value as a practical expedient | Pension Benefits | Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 626 | 822 |
Investment Measure at Net Asset Value as a practical expedient | Pension Benefits | Short-term Investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 118 | 125 |
Investment Measure at Net Asset Value as a practical expedient | Pension Benefits | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 63 | 235 |
Investment Measure at Net Asset Value as a practical expedient | Pension Benefits | Equity Securities | International |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 237 | 361 |
Investment Measure at Net Asset Value as a practical expedient | Postretirement |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 162 | 189 |
Investment Measure at Net Asset Value as a practical expedient | Postretirement | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 660 | 372 |
Investment Measure at Net Asset Value as a practical expedient | Postretirement | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 351 | 600 |
Investment Measure at Net Asset Value as a practical expedient | Postretirement | Equity Securities | International |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 88 | 126 |
U.S. Equities | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 30 | 24 |
U.S. Equities | Level 1 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
U.S. Equities | Level 2 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 30 | 24 |
U.S. Equities | Level 3 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
International Equities | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 9 | 8 |
International Equities | Level 1 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
International Equities | Level 2 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 9 | 8 |
International Equities | Level 3 | Postretirement | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Other U.S. government securities | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 536 | 406 |
Other U.S. government securities | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Other U.S. government securities | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 536 | 406 |
Other U.S. government securities | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
U.S. government securities (state & other) | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 365 | 376 |
U.S. government securities (state & other) | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
U.S. government securities (state & other) | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 365 | 376 |
U.S. government securities (state & other) | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Non-U.S. government securities | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 51 | 57 |
Non-U.S. government securities | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Non-U.S. government securities | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 51 | 57 |
Non-U.S. government securities | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Corporate bonds | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 2,489 | 2,619 |
Corporate bonds | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Corporate bonds | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 2,480 | 2,619 |
Corporate bonds | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 9 | 0 |
Asset-backed | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 66 | 46 |
Asset-backed | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Asset-backed | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 66 | 46 |
Asset-backed | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Collateralized mortgage obligations | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 447 | 472 |
Collateralized mortgage obligations | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Collateralized mortgage obligations | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 447 | 472 |
Collateralized mortgage obligations | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Collateralized loan obligations | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 549 | 650 |
Collateralized loan obligations | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Collateralized loan obligations | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 549 | 650 |
Collateralized loan obligations | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Interest Rate Swaps | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Notional | 1,227 | 1,373 |
Interest Rate Swaps | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 5 | 11 |
Interest Rate Swaps | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Interest Rate Swaps | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 5 | 11 |
Interest Rate Swaps | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Registered investment companies | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 110 | 65 |
Registered investment companies | Postretirement | Defined Benefit Plan, Debt Security |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 8 | 11 |
Registered investment companies | Postretirement | Short-term Investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 40 | 50 |
Registered investment companies | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 110 | 65 |
Registered investment companies | Level 1 | Postretirement | Defined Benefit Plan, Debt Security |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Registered investment companies | Level 1 | Postretirement | Short-term Investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 40 | 50 |
Registered investment companies | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Registered investment companies | Level 2 | Postretirement | Defined Benefit Plan, Debt Security |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 8 | 11 |
Registered investment companies | Level 2 | Postretirement | Short-term Investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Registered investment companies | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Registered investment companies | Level 3 | Postretirement | Defined Benefit Plan, Debt Security |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Registered investment companies | Level 3 | Postretirement | Short-term Investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Other | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 139 | 82 |
Other | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 63 | 17 |
Other | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | (6) | 0 |
Other | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 82 | 65 |
Partnerships | Pension Benefits | Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 942 | 1,004 |
Partnerships | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 2,142 | 1,713 |
Partnerships | Level 1 | Pension Benefits | Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Partnerships | Level 1 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Partnerships | Level 2 | Pension Benefits | Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Partnerships | Level 2 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Partnerships | Level 3 | Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 942 | 1,004 | 998
Partnerships | Level 3 | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 2,142 | 1,713 | 1,800
Partnerships | Level 3 | Pension Benefits | Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 942 | 1,004 |
Partnerships | Level 3 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 2,142 | 1,713 |
Hedge Fund | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 1,495 | 1,455 |
Hedge Fund | Level 1 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Hedge Fund | Level 2 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Hedge Fund | Level 3 | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 1,495 | 1,455 | $ 1,304
Hedge Fund | Level 3 | Pension Benefits | Other invested assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 1,495 | 1,455 |
Pooled separate accounts | Investment Measure at Net Asset Value as a practical expedient | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 2,222 | 2,347 |
Common/collective trusts | Investment Measure at Net Asset Value as a practical expedient | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 958 | 1,131 |
Other countries | Investment Measure at Net Asset Value as a practical expedient | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 113 | 85 |
Other common stocks | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 20 | 0 |
Other common stocks | Level 1 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 20 | 0 |
Other common stocks | Level 2 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Other common stocks | Level 3 | Pension Benefits | Fixed Maturities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Net assets at fair value | Postretirement |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 249 | $ 282 |

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