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COMMITMENTS AND CONTINGENCIES 4 (Details) $ in Millions | Mar. 31, 2021 USD ($)
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Narco Asbestos Loss Contingency Liability [Member] |
Loss Contingency By Nature Of Contingency [Line Items] |
Annual Trust Cap | $ 145

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- Definition Amount of annual cap on NARCO Trust + References No definition available. + Details
Name: | hon_AnnualTrustCap
Namespace Prefix: | hon_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | hon_LossContingencyByNatureOfContingencyLineItems
Namespace Prefix: | hon_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=hon_NarcoAsbestosLossContingencyLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |