XML 182 R160.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Derivatives (Credit Derivatives) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 228 | $ 105
Maximum Amount of Future Payments under Credit Default Swaps | $ 12,468 | $ 11,512
Weighted Average Years to Maturity | 4 years 6 months | 4 years 8 months 12 days
Aaa/Aa/A |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 82 | $ 82
Maximum Amount of Future Payments under Credit Default Swaps | $ 3,980 | $ 4,409
Weighted Average Years to Maturity | 2 years 7 months 6 days | 3 years 4 months 24 days
Aaa/Aa/A | Single name credit default swaps (3) |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ 3
Maximum Amount of Future Payments under Credit Default Swaps | $ 150 | $ 158
Weighted Average Years to Maturity | 1 year 7 months 6 days | 2 years 2 months 12 days
Aaa/Aa/A | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 80 | $ 79
Maximum Amount of Future Payments under Credit Default Swaps | $ 3,830 | $ 4,251
Weighted Average Years to Maturity | 2 years 8 months 12 days | 3 years 4 months 24 days
Baa |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 146 | $ 29
Maximum Amount of Future Payments under Credit Default Swaps | $ 8,287 | $ 6,856
Weighted Average Years to Maturity | 5 years 3 months 18 days | 5 years 6 months
Baa | Single name credit default swaps (3) |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 1 | $ 1
Maximum Amount of Future Payments under Credit Default Swaps | $ 99 | $ 81
Weighted Average Years to Maturity | 2 years 1 month 6 days | 2 years 6 months
Baa | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 145 | $ 28
Maximum Amount of Future Payments under Credit Default Swaps | $ 8,188 | $ 6,775
Weighted Average Years to Maturity | 5 years 4 months 24 days | 5 years 7 months 6 days
Ba |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ 2
Maximum Amount of Future Payments under Credit Default Swaps | $ 42 | $ 87
Weighted Average Years to Maturity | 2 years 7 months 6 days | 2 years 1 month 6 days
Ba | Single name credit default swaps (3) |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 0 | $ 0
Maximum Amount of Future Payments under Credit Default Swaps | $ 17 | $ 62
Weighted Average Years to Maturity | 2 years 1 month 6 days | 1 year 3 months 18 days
Ba | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ 2
Maximum Amount of Future Payments under Credit Default Swaps | $ 25 | $ 25
Weighted Average Years to Maturity | 3 years | 4 years
B [Member] |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ 2
Maximum Amount of Future Payments under Credit Default Swaps | $ 129 | $ 130
Weighted Average Years to Maturity | 5 years | 4 years 8 months 12 days
B [Member] | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ 2
Maximum Amount of Future Payments under Credit Default Swaps | $ 129 | $ 130
Weighted Average Years to Maturity | 5 years | 4 years 8 months 12 days
Caa |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ (4) | $ (10)
Maximum Amount of Future Payments under Credit Default Swaps | $ 30 |
Weighted Average Years to Maturity | 2 years 6 months | 3 years 6 months
Caa | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ (4) | $ (10)
Maximum Amount of Future Payments under Credit Default Swaps | $ 30 | $ 30
Weighted Average Years to Maturity | 2 years 6 months | 3 years 6 months

X
- Definition Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4K + Details
Name: | us-gaap_CreditDerivativeMaximumExposureUndiscounted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CreditDerivativesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of credit risk derivative liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4K -Subparagraph (c) -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4K + Details
Name: | us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeAverageRemainingMaturity1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=met_AaaAaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditDerivativesByContractTypeAxis=us-gaap_CreditDefaultSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditDerivativesByContractTypeAxis=us-gaap_CreditIndexProductMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=met_BaaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=met_BaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=met_BMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=met_CaaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |