XML 88 R66.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Business, Basis of Presentation and Summary of Significant Accounting Policies -Upper-Medium Grade Discount Rate (Details) | Dec. 31, 2023
--- | ---
JAPAN |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 10
Republic of Korea |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 5
CHILE |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 10
Measurement Input, Credit Spread | JAPAN | Minimum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 10
Measurement Input, Credit Spread | JAPAN | Maximum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 30
Measurement Input, Credit Spread | Republic of Korea | Minimum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 5
Measurement Input, Credit Spread | Republic of Korea | Maximum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 30
Measurement Input, Credit Spread | CHILE | Minimum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 10
Measurement Input, Credit Spread | CHILE | Maximum |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input | 25

X
- Definition Liability For Future Policy Benefit, Upper-Medium Grade Discount Rate, Measurement Input + References No definition available. + Details
Name: | met_LiabilityForFuturePolicyBenefitUpperMediumGradeDiscountRateMeasurementInput
Namespace Prefix: | met_
Data Type: | xbrli:decimalItemType
Balance Type: | na
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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_JP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_KR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_CL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputCreditSpreadMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |