XML 94 R80.htm IDEA: XBRL DOCUMENT v3.25.3
Employee Benefit Plans - Net Periodic Defined Benefit Pension and Other Postretirement Benefit Costs (Detail) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Pension Benefits [Member] | Foreign Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 3 $ 3 $ 3
Interest cost 6 8 7
Expected return on plan assets $ (8) $ (9) $ (7)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other income (expense) Other income (expense) Other income (expense)
Amortization of net (gains) losses $ 3   $ (1)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]     Other income (expense)
Net periodic (benefit) cost 4 $ 2 $ 2
Postretirement Benefits [Member] | U.S. Defined Benefit Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost 1 1 1
Amortization of net (gains) losses $ (1) $ (1) $ (1)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other income (expense) Other income (expense) Other income (expense)
Postretirement Benefits [Member] | Foreign Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost   $ 1 $ 1
Amortization of net (gains) losses   $ (1)  
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]   Other income (expense)  
Net periodic (benefit) cost     $ 1