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v3.25.3

BUSINESS SEGMENTS INFORMATION - Schedule of Financial Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | $ 41,964 |  |  |  | $ 44,246 |  |  |  | $ 41,964 | $ 44,246 | $ 42,746
Depreciation and Amortization |  |  |  |  |  |  |  |  | 1,518 | 1,689 | 1,051
Capital Expenditures |  |  |  |  |  |  |  |  | 431 | 419 | 363
Sales | 4,855 | $ 4,553 | $ 4,432 | $ 4,175 | 4,619 | $ 4,380 | $ 4,376 | $ 4,117 | 18,016 | 17,492 | 15,165
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 18,091 | 17,560 | 15,236
Corporate and other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | 3,413 |  |  |  | 5,607 |  |  |  | 3,413 | 5,607 | 13,226
Depreciation and Amortization |  |  |  |  |  |  |  |  | 44 | 46 | 37
Capital Expenditures |  |  |  |  |  |  |  |  | 35 | 62 | 47
Intelligent Devices | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | 13,984 |  |  |  | 13,526 |  |  |  | 13,984 | 13,526 | 13,321
Depreciation and Amortization |  |  |  |  |  |  |  |  | 448 | 442 | 432
Capital Expenditures |  |  |  |  |  |  |  |  | 316 | 284 | 277
Sales |  |  |  |  |  |  |  |  | 12,400 | 12,161 | 11,588
Intelligent Devices | Operating Segments | Final Control |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | 5,889 |  |  |  | 5,706 |  |  |  | 5,889 | 5,706 | 5,614
Depreciation and Amortization |  |  |  |  |  |  |  |  | 161 | 159 | 170
Capital Expenditures |  |  |  |  |  |  |  |  | 102 | 93 | 93
Sales |  |  |  |  |  |  |  |  | 4,380 | 4,204 | 3,970
Intelligent Devices | Operating Segments | Measurement & Analytical |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | 4,253 |  |  |  | 4,122 |  |  |  | 4,253 | 4,122 | 3,976
Depreciation and Amortization |  |  |  |  |  |  |  |  | 140 | 138 | 121
Capital Expenditures |  |  |  |  |  |  |  |  | 107 | 84 | 93
Sales |  |  |  |  |  |  |  |  | 4,143 | 4,061 | 3,595
Intelligent Devices | Operating Segments | Discrete Automation |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | 2,569 |  |  |  | 2,470 |  |  |  | 2,569 | 2,470 | 2,493
Depreciation and Amortization |  |  |  |  |  |  |  |  | 87 | 87 | 84
Capital Expenditures |  |  |  |  |  |  |  |  | 61 | 61 | 56
Sales |  |  |  |  |  |  |  |  | 2,521 | 2,506 | 2,635
Intelligent Devices | Operating Segments | Safety & Productivity |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | 1,273 |  |  |  | 1,228 |  |  |  | 1,273 | 1,228 | 1,238
Depreciation and Amortization |  |  |  |  |  |  |  |  | 60 | 58 | 57
Capital Expenditures |  |  |  |  |  |  |  |  | 46 | 46 | 35
Sales |  |  |  |  |  |  |  |  | 1,356 | 1,390 | 1,388
Software & Control | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | 24,567 |  |  |  | 25,113 |  |  |  | 24,567 | 25,113 | 16,199
Depreciation and Amortization |  |  |  |  |  |  |  |  | 1,026 | 1,201 | 582
Capital Expenditures |  |  |  |  |  |  |  |  | 80 | 73 | 39
Sales |  |  |  |  |  |  |  |  | 5,691 | 5,399 | 3,648
Software & Control | Operating Segments | Control Systems & Software |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | 15,758 |  |  |  | 15,903 |  |  |  | 15,758 | 15,903 | 16,199
Depreciation and Amortization |  |  |  |  |  |  |  |  | 550 | 594 | 582
Capital Expenditures |  |  |  |  |  |  |  |  | 51 | 46 | 39
Sales |  |  |  |  |  |  |  |  | 4,205 | 3,935 | 3,648
Software & Control | Operating Segments | Test & Measurement |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | $ 8,809 |  |  |  | $ 9,210 |  |  |  | 8,809 | 9,210 | 0
Depreciation and Amortization |  |  |  |  |  |  |  |  | 476 | 607 | 0
Capital Expenditures |  |  |  |  |  |  |  |  | 29 | 27 | 0
Sales |  |  |  |  |  |  |  |  | $ 1,486 | $ 1,464 | $ 0

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

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=emr_IntelligentDevicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=emr_FinalControlMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=emr_SafetyAndProductivityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=emr_TestAndMeasurementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |