v3.26.1
Revenue Recognition - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2026
segment
Mar. 31, 2025
segment
Mar. 31, 2026
USD ($)
segment
Mar. 31, 2025
USD ($)
segment
Revenue from Contract with Customer [Abstract]        
Number of operating segments | segment 3 3 3 3
Contract with customer, liability, revenue recognized     $ 395 $ 506
Contract with customer, performance obligation satisfied in previous period     $ 0 $ 0