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Assets and Liabilities Held For Sale and Discontinued Operations - Summarized Results of Discontinued Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Income from discontinued operations, net of tax | $ 160 | $ 201 | $ 301 | $ 349
Income from discontinued operations attributable to noncontrolling interest, net of tax | 77 | 78 | 157 | 148
Discontinued operations | 83 | 123 | 144 | 201
Discontinued Operations, Held-for-Sale | Residential and Light Commercial HVAC Business |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net sales | 1,369 | 1,333 | 3,404 | 3,320
Cost of goods sold | 1,007 | 954 | 2,579 | 2,468
Gross profit | 362 | 379 | 825 | 852
Selling, general and administrative expenses | 212 | 195 | 584 | 562
Restructuring and impairment costs | 12 | 3 | 21 | 22
Net financing charges | 5 | 2 | 6 | 17
Equity income | 77 | 75 | 211 | 196
Income from discontinued operations before income taxes | 210 | 254 | 425 | 447
Provision for income taxes on discontinued operations | 50 | 53 | 124 | 98
Income from discontinued operations, net of tax | 160 | 201 | 301 | 349
Income from discontinued operations attributable to noncontrolling interest, net of tax | 77 | 78 | 157 | 148
Discontinued operations | $ 83 | $ 123 | $ 144 | $ 201

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