XML 146 R135.htm IDEA: XBRL DOCUMENT
v3.25.2

Subsequent Events (Details) $ in Billions | Jul. 01, 2025 USD ($)
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Subsequent Event | Chariot Reinsurance, Ltd |
Subsequent Event [Line Items] |
Reinsurance, Amount Ceded, Liabilities | $ 10.0

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- Definition Amount of ceded reinsurance liabilities + References No definition available. + Details
Name: | met_ReinsuranceAmountCededLiabilities
Namespace Prefix: | met_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483399/855-10-50-2 + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_CededCreditRiskAxis=met_ChariotReinsuranceLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |