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Segment Information - Financial Information Related to Company's Reportable Segments (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |
Total net sales | $ 6,094 | $ 6,068
Total segment EBITA | 780 | 792
Corporate expenses | 139 | 109
Amortization of intangible assets | 122 | 104
Restructuring and impairment costs | 39 | 345
Net mark-to-market gains | (22) | (3)
Net financing charges | (99) | (67)
Income before income taxes | 403 | 170
Building Solutions North America |  |
Segment Reporting Information [Line Items] |  |
Total net sales | 2,487 | 2,367
Total segment EBITA | 285 | 267
Building Solutions EMEA/LA |  |
Segment Reporting Information [Line Items] |  |
Total net sales | 1,038 | 975
Total segment EBITA | 80 | 75
Building Solutions Asia Pacific |  |
Segment Reporting Information [Line Items] |  |
Total net sales | 507 | 646
Total segment EBITA | 46 | 68
Global Products |  |
Segment Reporting Information [Line Items] |  |
Total net sales | 2,062 | 2,080
Total segment EBITA | $ 369 | $ 382

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