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Financial Instruments (Fair Value Measurements) (Details) $ in Millions | Dec. 31, 2021 USD ($)
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Derivatives, Fair Value [Line Items] |
Fair value of long-term debt compared with carrying value | $ 411
Collateral posted to counterparties | 0
Collateral held from counterparties | 0
Fair Value, Inputs, Level 2 [Member] |
Derivatives, Fair Value [Line Items] |
Fair value of long-term debt | $ 9,200

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- Definition The aggregate fair value of assets held at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References No definition available. + Details
Name: | emr_CollateralHeldFromCounterparties
Namespace Prefix: | emr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The aggregate fair value of long term debt in excess of/(less than) the related carrying value. + References No definition available. + Details
Name: | emr_FairValueLongTermDebtComparedWithCarryingValue
Namespace Prefix: | emr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624258-113959 + Details
Name: | us-gaap_CollateralAlreadyPostedAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |