v3.26.1
Divestitures- Summarized Results of Discontinued Operations (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income from discontinued operations, net of tax $ 4 $ 51 $ (27) $ 141
Income from discontinued operations attributable to noncontrolling interest, net of tax 0 46 0 80
Discontinued operations 4 5 (27) 61
Discontinued Operations, Disposed of by Sale | Residential and Light Commercial HVAC Business        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net sales   1,069   2,035
Cost of goods sold   841   1,572
Gross profit   228   463
Selling, general and administrative expenses   189   372
Restructuring and impairment costs   5   9
Net financing charges   2   1
Equity income   69   134
Income from discontinued operations before income taxes   101   215
Provision for income taxes on discontinued operations   50   74
Income from discontinued operations, net of tax $ 4 51 $ (27) 141
Income from discontinued operations attributable to noncontrolling interest, net of tax   46   80
Discontinued operations   $ 5   $ 61