ASSOCIATE MEDICAL BENEFITS - Retiree Medical Plan for Domestic Associates (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Amounts recognized in the Consolidated Balance Sheets consist of:
Non-current liabilities	$ (64.3)	$ (73.0)
Postretirement Medical Benefits \| U.S. Plan
Change in projected benefit obligation:
Benefit obligation at beginning of year	13.8	13.3
Service cost	0.1	0.1
Interest cost	0.5	0.8
Plan participants’ contributions	0.2	0.3
Actuarial loss	0.1	1.5
Benefits paid	(1.9)	(2.2)
Projected benefit obligation (“PBO”) at end of year	12.8	13.8
Change in plan assets:
Fair value of plan assets at beginning of year	0.0	0.0
Employer contribution	1.7	1.9
Plan participants’ contributions	0.2	0.3
Gross benefits paid	(1.9)	(2.2)
Fair value of plan assets at end of year	0.0	0.0
Overfunded (underfunded) status at end of year	(12.8)	(13.8)
Amounts recognized in the Consolidated Balance Sheets consist of:
Current liabilities	(1.3)	(1.3)
Non-current liabilities	(11.5)	(12.5)
Total amount accrued	(12.8)	(13.8)
Amounts recognized in AOCL consist of:
Actuarial gain	(1.2)	(1.3)
Total amount recognized	(1.2)	(1.3)
Total change in other comprehensive income attributable to:
Loss during the period	(0.1)	(1.5)
Reclassification to net earnings	0.0	(0.6)
Total change in other comprehensive income	$ (0.1)	$ (2.1)
Discount rate used in development of APBO	5.04%	4.86%

The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets included in the rollforward of benefit obligation.

No definition available.