Debt and Other Obligations Debt and Other Obligations - Secured Debt of VIEs (Details) - USD ($)	Sep. 30, 2025	Oct. 02, 2024	Sep. 30, 2024	Sep. 30, 2013	Aug. 09, 2013	Sep. 30, 2012	Jan. 17, 2012
Variable Interest Entities
Face Amount	$ 40,000,000			$ 360,000,000
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount	18,000,000		$ 19,000,000
Long-term debt of variable interest entities (including current maturities)	1,696,000,000		966,000,000
Reported Value Measurement
Variable Interest Entities
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount	16,000,000		17,000,000
Long-term debt of variable interest entities (including current maturities)	1,681,000,000		$ 934,000,000
SCCG
Variable Interest Entities
Interest rate					3.846%
JSCCG
Variable Interest Entities
Face Amount						$ 900,000,000
Interest rate							4.626%
Holdco
Variable Interest Entities
Face Amount						$ 100,000,000
Interest rate							7.10%
Holdco balloon payment upon maturity	$ 10,000,000
JACTG
Variable Interest Entities
Face Amount		$ 720,000,000
Interest rate		5.078%
JHLLC
Variable Interest Entities
Face Amount		$ 80,000,000
Interest rate	5.74%