v3.26.3
SEGMENTS - Total Assets, Capital Expenditures and Depreciation and Amortization by Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2024
Segment Reporting [Line Items]      
Total assets $ 28,014 $ 22,909 $ 25,586
Capital expenditures 274 222 165
Depreciation and amortization expense 445 367 312
Operating Segments | Power & Control      
Segment Reporting [Line Items]      
Total assets 15,115 9,859 9,180
Capital expenditures 151 108 90
Depreciation and amortization expense 245 180 133
Operating Segments | Airframe      
Segment Reporting [Line Items]      
Total assets 10,525 10,267 10,045
Capital expenditures 114 103 73
Depreciation and amortization expense 194 181 172
Operating Segments | Non-aviation      
Segment Reporting [Line Items]      
Total assets 219 202 193
Capital expenditures 8 9 2
Depreciation and amortization expense 6 6 6
Corporate      
Segment Reporting [Line Items]      
Total assets 2,155 2,581 6,168
Capital expenditures 1 2 0
Depreciation and amortization expense $ 0 $ 0 $ 1