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Long-term and Short-term Debt (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jul. 11, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Mar. 31, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Other Short-term Borrowings |  | $ 76 | $ 241 |  |  |  |  |
Short-term Debt, Weighted Average Interest Rate, at Point in Time |  | 5.23% | 1.41% | 2.01% |  |  |  |
Debt Issuance Costs, Gross |  |  |  | $ 6 |  |  |  |
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net |  | $ 87 | $ 82 |  |  |  |  |
Long Term Debt Aggregate Maturities, Year One |  | 1,100 |  |  |  |  |  |
Long Term Debt Aggregate Maturities, Year Two |  | 1,700 |  |  |  |  |  |
Long Term Debt Aggregate Maturities, Year Three |  | 1,200 |  |  |  |  |  |
Long Term Debt Aggregate Maturities, Year Four |  | 539 |  |  |  |  |  |
Long Term Debt Aggregate Maturities, Year Five |  | 51 |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal after Year Five |  | 10,000 |  |  |  |  |  |
Interest Expense, Debt |  | 655 | 647 | 632 |  |  |  |
Senior notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Principal Outstanding |  | $ 13,671 | 12,891 |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.70% |  |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net |  | $ 83 | 77 |  |  |  |  |
Other Notes MPEH [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 50 |  |  |  |  |  |  | $ 75
Repayments of Long-term Debt | $ 75 |  |  |  |  |  |  |
Other Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Principal Outstanding |  | 500 | 536 |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net |  | 3 | $ 3 |  |  |  |  |
Senior Debt $500 Million 3.048% which matures in December 2022 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.048% |  |  |  |  |
Early Repayment of Senior Debt |  |  | $ 500 |  |  |  |  |
Redemption Premium |  |  | 17 |  |  |  |  |
senior debt 1.0 billion July 2052 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 1,000 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 5.00% |  |  |
Debt Issuance Costs, Gross |  |  |  |  | $ 11 |  |  |
Securities Sold under Agreements to Repurchase [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Other Short-term Borrowings |  | $ 76 | $ 241 |  |  |  |  |
Parent Company [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.23% | 212.00% |  |  | 100.00% |  |
Long Term Debt Aggregate Maturities, Year One |  | $ 1,300 |  |  |  |  |  |
Long Term Debt Aggregate Maturities, Year Two |  | 1,400 |  |  |  |  |  |
Long Term Debt Aggregate Maturities, Year Three |  | 1,200 |  |  |  |  |  |
Long Term Debt Aggregate Maturities, Year Four |  | 508 |  |  |  |  |  |
Long Term Debt Aggregate Maturities, Year Five |  | 0 |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal after Year Five |  | 10,800 |  |  |  |  |  |
Interest Expense, Debt |  | 829 | $ 847 | $ 833 |  |  |  |
Parent Company [Member] | Senior Notes Affiliated [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 182.00% |
Committed Credit Facility Six [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount |  | 2,487 |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 2,896 |  |  |  |  |  |
Committed Credit Facility Six [Member] | Brighthouse Financial, Inc |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount |  | $ 2,500 |  |  |  |  |  |

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