v3.26.1
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Stockholders' equity, beginning balance     $ 20,298  
Other comprehensive income (loss), net of tax $ (32) $ 192 (40) $ (287)
Stockholders' equity, ending balance 20,319 19,266 20,319 19,266
Accumulated other comprehensive income (loss)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Stockholders' equity, beginning balance (828) (1,340) (821) (868)
Stockholders' equity, ending balance (861) (1,150) (861) (1,150)
Foreign currency translation        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Stockholders' equity, beginning balance (584) (1,101) (565) (616)
Other comprehensive income (loss), net of tax (36) 184 (55) (301)
Stockholders' equity, ending balance (620) (914) (620) (914)
Other comprehensive income (loss), tax 5 17 8 1
Purchase of noncontrolling interest        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Other comprehensive income (loss), net of tax 0 3 0 3
Pension and postretirement        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Stockholders' equity, beginning balance (265) (242) (269) (245)
Other comprehensive income (loss), net of tax 4 3 8 6
Stockholders' equity, ending balance (261) (239) (261) (239)
Other comprehensive income (loss), tax (1) (1) (2) (2)
Cash flow hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Stockholders' equity, beginning balance 21 3 13 (7)
Other comprehensive income (loss), net of tax 6 1 18 12
Reclassification, net of tax (7) (1) (11) (2)
Stockholders' equity, ending balance 20 3 20 3
Other comprehensive income (loss), tax (2) (1) (6) (4)
Reclassification of (gains) losses to sales and cost of sales, tax $ 2 $ 1 $ 4 $ 1