v3.26.1
Segment Information - Schedule of Financial Information for Reportable Segments (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Consolidated net sales $ 3,929 $ 3,741 $ 11,438 $ 10,847
Administrative, engineering and allocated costs 136 129 404 398
Equity income 20 17 60 60
Adjusted EBITDA 246 246 721 718
Corporate-related costs (21) (20) (66) (63)
Restructuring and impairment costs (5) (7) (34) (381)
Purchase accounting amortization (12) (12) (35) (35)
Restructuring-related activities (8) (7) (21) (13)
Gain on disposal transactions       4
Depreciation expense (74) (71) (211) (207)
Equity based compensation (9) (10) (26) (20)
Other items (3) (1) 3 (8)
Net financing charges (48) (51) (144) (144)
Other pension expense (1) (1) (5) (3)
Income (loss) before income taxes 65 66 182 (152)
Restructuring charges 5 9 33 42
Restructuring charges   7 16 18
Non-recurring reversal accrued     5  
Gain on contract settlement     2 2
Transaction costs 3   4  
Professional fees   1   9
Affilliates        
Segment Reporting [Line Items]        
Equity income       1
Restructuring charges   6 3 7
Affiliates, Partially-Owned        
Segment Reporting [Line Items]        
Restructuring charges   6 3 6
Income Statement Location [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense        
Segment Reporting [Line Items]        
Restructuring charges     2  
Restructured Facility        
Segment Reporting [Line Items]        
Gain on disposition of property plant equipment   6   11
2026 Restructuring Plan and Past Plans        
Segment Reporting [Line Items]        
Restructuring charges 5   34  
2025 Restructuring Plan and Past Plans        
Segment Reporting [Line Items]        
Restructuring charges   7   38
Operating Segments        
Segment Reporting [Line Items]        
Consolidated net sales 3,949 3,749 11,505 10,898
Operating Segments | Americas        
Segment Reporting [Line Items]        
Consolidated net sales 1,928 1,760 5,454 5,070
Material costs 1,278 1,155 3,540 3,292
Labor and overhead 469 447 1,459 1,345
Administrative, engineering and allocated costs 56 46 141 142
Equity income 0 0 0 0
Adjusted EBITDA 125 112 314 291
Operating Segments | EMEA        
Segment Reporting [Line Items]        
Consolidated net sales 1,211 1,268 3,688 3,628
Material costs 762 787 2,274 2,254
Labor and overhead 398 402 1,186 1,133
Administrative, engineering and allocated costs 42 63 149 161
Equity income 5 5 14 13
Adjusted EBITDA 14 21 93 93
Operating Segments | Asia        
Segment Reporting [Line Items]        
Consolidated net sales 810 721 2,363 2,200
Material costs 573 498 1,671 1,518
Labor and overhead 116 104 340 307
Administrative, engineering and allocated costs 29 24 87 91
Equity income 15 18 49 50
Adjusted EBITDA 107 113 314 334
Inter-segment elimination        
Segment Reporting [Line Items]        
Consolidated net sales $ (20) $ (8) $ (67) $ (51)