XML 105 R88.htm IDEA: XBRL DOCUMENT v3.23.3
Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified Out of AOCI (Detail) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total before tax $ (6) $ 31 $ 5
(Gains) Losses Reclassified to Interest Expense [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total before tax (6) (6) (5)
(Gains) Losses Excluded from Effectiveness Testing and Amortized to Interest Expense [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total before tax 2 2 2
Release of Current Translation Adjustment [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total before tax   33  
Release of Actuarial Losses and Prior Service Cost (Credit) [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total before tax   2  
Amortization of Actuarial Losses and Prior Service Cost (Credit) [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total before tax $ (2) 1 3
Settlement and Curtailment Loss (Gain)      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total before tax   $ (1) $ 5