v3.26.3
RELATED PARTY TRANSACTIONS - Schedule of Allocations for Shared Services and General Corporate Costs (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 4 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Related Party Transaction [Line Items]            
Salaries and employee benefits $ 378 $ 349 $ 1,128 $ 1,084 $ 1,506 $ 1,433
Depreciation and amortization 38 43 114 125 152 168
Total operating expenses $ 709 $ 627 $ 2,189 1,969 $ 2,898 2,596
Related Party            
Related Party Transaction [Line Items]            
Salaries and employee benefits       89   120
Operating supplies and expenses       72   96
Depreciation and amortization       14   20
Total operating expenses       $ 175   $ 236