XML 92 R81.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Investments (Securities Lending and Repurchase Agreements Remaining Tenor) (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | $ 11,159 | $ 10,788
U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 9,870 | 9,418
Foreign government |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 1,107 | 1,107
Agency RMBS |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 182 | 263
Open (1) |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 2,280 | 1,393
Open (1) | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 2,280 | 1,393
Open (1) | Foreign government |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 0
Open (1) | Agency RMBS |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 0
1 Month or Less |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 5,001 | 4,677
1 Month or Less | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 3,785 | 4,106
1 Month or Less | Foreign government |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 1,107 | 483
1 Month or Less | Agency RMBS |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 109 | 88
Over 1 Month to 6 Months |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 3,878 | 4,718
Over 1 Month to 6 Months | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 3,805 | 3,919
Over 1 Month to 6 Months | Foreign government |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 624
Over 1 Month to 6 Months | Agency RMBS |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 73 | 175
Over 6 Months to 1 Year |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 0
Over 6 Months to 1 Year | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 0
Over 6 Months to 1 Year | Foreign government |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 0
Over 6 Months to 1 Year | Agency RMBS |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 0
Repurchase Agreements |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 2,975 | 2,975
Repurchase Agreements | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 2,975 | 2,975
Repurchase Agreements | Open (1) | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 0
Repurchase Agreements | 1 Month or Less | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 2,975 | 2,975
Repurchase Agreements | Over 1 Month to 6 Months | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | 0 | 0
Repurchase Agreements | Over 6 Months to 1 Year | U.S. government and agency |  |
Securities Financing Transaction [Line Items] |  |
Cash collateral on deposit from counterparties | $ 0 | $ 0

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_SecuritiesFinancingTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount of liabilities associated with financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A + Details
Name: | us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=met_AgencyRMBSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SecuritiesFinancingTransactionAxis=us-gaap_MaturityOvernightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SecuritiesFinancingTransactionAxis=us-gaap_MaturityUpTo30DaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SecuritiesFinancingTransactionAxis=met_Maturity30to180DaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SecuritiesFinancingTransactionAxis=met_Maturity180to360DaysMemberDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_RepurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |