Variable Interest Entities - World Energy (Details) $ in Millions	1 Months Ended
	Nov. 30, 2023 renewal	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Variable Interest Entity [Line Items]
Financing receivables		$ 1,213.4	$ 817.2
Sustainable Aviation Fuel Facility - World Energy, LLC | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Financing receivables		300.0
Term of project agreement (in years)	15 years
Number of renewal terms of project agreement | renewal	2
Project agreement, renewal term (in years)	5 years
Variable interest entity, reporting entity involvement, maximum loss exposure, amount		2,100.0
Sustainable Aviation Fuel Facility - World Energy, LLC | Variable Interest Entity, Not Primary Beneficiary | Purchase Commitment
Variable Interest Entity [Line Items]
Variable interest entity, reporting entity involvement, maximum loss exposure, amount		250.0
Sustainable Aviation Fuel Facility - World Energy, LLC | Variable Interest Entity, Not Primary Beneficiary | Property, Plant and Equipment
Variable Interest Entity [Line Items]
Variable interest entity, reporting entity involvement, maximum loss exposure, amount		$ 1,500.0