XML 96 R83.htm IDEA: XBRL DOCUMENT
v3.22.2

Derivatives (Fair Value Hedges) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fixed maturity securities AFS |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | $ (149) | $ (161)
Debt Instruments, Carrying Amount | 1,752 | 2,164
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 0 | (1)
Mortgages [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | 444 | 634
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | (8) | 3
Future policy benefits [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | (4,087) | (4,735)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | (40) | (877)
Policyholder Account Balances [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | (1,082) | 0
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | $ 9 | $ 0

X
- Definition Debt Instruments, Carrying Amount + References No definition available. + Details
Name: | met_DebtInstrumentsCarryingAmount
Namespace Prefix: | met_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, remaining after discontinued hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109999712-113959 + Details
Name: | us-gaap_HedgedAssetDiscontinuedFairValueHedgeCumulativeIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109999712-113959 + Details
Name: | us-gaap_HedgedAssetFairValueHedgeCumulativeIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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