v3.25.2
Fair Value Measurements - Narrative (Details) - USD ($)
$ in Billions
Jun. 30, 2025
Sep. 30, 2024
Fair Value [Line Items]    
Fair value of long term debt $ 8.6 $ 8.3
Quoted Prices in Active Markets (Level 1)    
Fair Value [Line Items]    
Fair value of long term debt 8.3 8.1
Significant Other Observable Inputs (Level 2)    
Fair Value [Line Items]    
Fair value of long term debt $ 0.3 $ 0.2