XML 163 R141.htm IDEA: XBRL DOCUMENT
v3.22.4

Derivatives (Credit Derivatives) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 105 | $ 165
Maximum Amount of Future Payments under Credit Default Swaps | $ 11,512 | $ 8,626
Weighted Average Years to Maturity | 4 years 8 months 12 days | 4 years 7 months 6 days
Aaa/Aa/A |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 82 | $ 21
Maximum Amount of Future Payments under Credit Default Swaps | $ 4,409 | $ 1,350
Weighted Average Years to Maturity | 3 years 4 months 24 days | 2 years 7 months 6 days
Aaa/Aa/A | Single name credit default swaps (3) |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 3 | $ 4
Maximum Amount of Future Payments under Credit Default Swaps | $ 158 | $ 159
Weighted Average Years to Maturity | 2 years 2 months 12 days | 3 years 1 month 6 days
Aaa/Aa/A | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 79 | $ 17
Maximum Amount of Future Payments under Credit Default Swaps | $ 4,251 | $ 1,191
Weighted Average Years to Maturity | 3 years 4 months 24 days | 2 years 6 months
Baa |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 29 | $ 148
Maximum Amount of Future Payments under Credit Default Swaps | $ 6,856 | $ 7,089
Weighted Average Years to Maturity | 5 years 6 months | 5 years
Baa | Single name credit default swaps (3) |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 1 | $ 2
Maximum Amount of Future Payments under Credit Default Swaps | $ 81 | $ 101
Weighted Average Years to Maturity | 2 years 6 months | 3 years 4 months 24 days
Baa | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 28 | $ 146
Maximum Amount of Future Payments under Credit Default Swaps | $ 6,775 | $ 6,988
Weighted Average Years to Maturity | 5 years 7 months 6 days | 5 years
Ba |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ 0
Maximum Amount of Future Payments under Credit Default Swaps | $ 87 | $ 102
Weighted Average Years to Maturity | 2 years 1 month 6 days | 2 years
Ba | Single name credit default swaps (3) |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 0 | $ 1
Maximum Amount of Future Payments under Credit Default Swaps | $ 62 | $ 82
Weighted Average Years to Maturity | 1 year 3 months 18 days | 1 year 2 months 12 days
Ba | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ (1)
Maximum Amount of Future Payments under Credit Default Swaps | $ 25 | $ 20
Weighted Average Years to Maturity | 4 years | 5 years
B [Member] |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ 5
Maximum Amount of Future Payments under Credit Default Swaps | $ 130 | $ 55
Weighted Average Years to Maturity | 4 years 8 months 12 days | 4 years
B [Member] | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ 2 | $ 5
Maximum Amount of Future Payments under Credit Default Swaps | $ 130 | $ 55
Weighted Average Years to Maturity | 4 years 8 months 12 days | 4 years
Caa3 |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ (10) | $ (9)
Maximum Amount of Future Payments under Credit Default Swaps | $ 30 |
Weighted Average Years to Maturity | 3 years 6 months | 4 years 6 months
Caa3 | Credit default swaps referencing indices |  |
Credit Derivatives [Line Items] |  |
Estimated Fair Value of Credit Default Swaps | $ (10) | $ (9)
Maximum Amount of Future Payments under Credit Default Swaps | $ 30 | $ 30
Weighted Average Years to Maturity | 3 years 6 months | 4 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 -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5708775-113959 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5708775-113959 + 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_Caa3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |