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Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |
Net sales | $ 4,473 | $ 4,161
Earnings | 1,175 | 563
Interest expense | (38) | (40)
Gain from periodic distribution from retained subordinated interest in Vertiv (VRT) | (453) | 0
Operating Segments [Member] | Automation Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 2,805 | 2,692
Earnings | 526 | 361
Operating Segments [Member] | Commercial & Residential Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 1,671 | 1,476
Earnings | 299 | 310
Operating Segments [Member] | Climate Technologies [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 1,163 | 1,031
Earnings | 192 | 212
Operating Segments [Member] | Tools & Home Products [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 508 | 445
Earnings | 107 | 98
Segment Reconciling Items [Member] |  |
Segment Reporting Information [Line Items] |  |
Stock compensation | (41) | (64)
Unallocated pension and postretirement costs | 26 | 24
Interest expense | (38) | (40)
Corporate and other [Member] |  |
Segment Reporting Information [Line Items] |  |
Earnings | (50) | (28)
Intersegment Eliminations [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | $ (3) | $ (7)

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