XML 97 R78.htm IDEA: XBRL DOCUMENT v3.23.3
Income Taxes - Schedule of Reconciliation of Unrecognized Tax Benefits Including Interest and Penalties (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning Balance $ 8 $ 12 $ 12
Additions for current year tax positions 3 0 0
Additions for prior year tax positions 9 1 3
Subtractions for prior year tax positions (7) (5) (3)
Ending Balance $ 13 $ 8 $ 12