v3.26.1
Fair Value Measurements - Schedule of Carrying Values and Estimated Fair Values of Long-term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Fair Value Disclosures [Abstract]    
Carrying Amount $ 10,225,000 $ 8,935,000
Fair Value $ 9,379,797 $ 8,272,978