v3.26.3
BUSINESS SEGMENTS AND DISAGGREGATED REVENUE - Schedule of Segment Information (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
Segment Reporting [Line Items]            
Depreciation and amortization $ 323 $ 330 $ 967 $ 972 $ 1,290 $ 1,302
Operating Segments | Express U.S. Domestic Segment            
Segment Reporting [Line Items]            
Depreciation and amortization     647 656 863 879
Operating Segments | Express International Segment            
Segment Reporting [Line Items]            
Depreciation and amortization     294 292 392 392
Corporate, other, and eliminations            
Segment Reporting [Line Items]            
Depreciation and amortization     $ 26 $ 24 $ 35 $ 31