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Average pay interest rate related to the group of interest rate derivatives

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Non-recourse project financing which will fund project and be drawn over construction period

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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- Definition

Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Variable Interest Entities - Project Financing (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	May 31, 2023	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Long-term debt, Principal Amount		$ 10,292.5	$ 7,309.3
Less: Unamortized discount and debt issuance costs		(165.7)	(45.4)
Interest rate swaps contracts \| Cash Flow Hedges \| Designated as Hedging Instrument
Debt Instrument [Line Items]
Notional Principal amount		$ 1,182.5	$ 0.0
Average Pay %		2.82%	0.00%
NEOM Green Hydrogen Project Financing, Primary \| Nonrecourse \| NEOM Green Hydrogen Company
Debt Instrument [Line Items]
Project financing, maximum borrowing capacity	$ 6,100.0
Amount of debt funding, percent		73.00%
NEOM Green Hydrogen Project Financing, Working Capital \| Nonrecourse \| NEOM Green Hydrogen Company
Debt Instrument [Line Items]
Project financing, maximum borrowing capacity	500.0
Variable Interest Entity, Primary Beneficiary \| NEOM Green Hydrogen Company
Debt Instrument [Line Items]
Project financing fees		$ 58.8
Variable Interest Entity, Primary Beneficiary \| Nonrecourse \| NEOM Green Hydrogen Company
Debt Instrument [Line Items]
Long-term debt, Principal Amount		1,364.8
Less: Unamortized discount and debt issuance costs		(90.4)
Long-term Debt		1,274.4
Variable Interest Entity, Primary Beneficiary \| Nonrecourse \| NEOM Green Hydrogen Company \| Payable in U.S. Dollars
Debt Instrument [Line Items]
Long-term debt, Principal Amount		$ 1,233.4
Variable Interest Entity, Primary Beneficiary \| U.S. Dollar Loan Facility 5.00% due 2027-2053 \| Nonrecourse \| NEOM Green Hydrogen Company
Debt Instrument [Line Items]
Interest rate, stated percentage		5.00%
Variable Interest Entity, Primary Beneficiary \| U.S. Dollar Loan Facility 5.00% due 2027-2053 \| Nonrecourse \| NEOM Green Hydrogen Company \| Payable in U.S. Dollars
Debt Instrument [Line Items]
Long-term debt, Principal Amount		$ 138.5
Variable Interest Entity, Primary Beneficiary \| Saudi Riyal Loan Facility variable-rate 6.69% due 2027 \| Nonrecourse \| NEOM Green Hydrogen Company
Debt Instrument [Line Items]
Interest rate, variable percentage		6.69%
Variable Interest Entity, Primary Beneficiary \| Saudi Riyal Loan Facility variable-rate 6.69% due 2027 \| Nonrecourse \| NEOM Green Hydrogen Company \| Saudi Arabian Interbank Offered Rate (SAIBOR)
Debt Instrument [Line Items]
Annual margin		0.80%
Variable Interest Entity, Primary Beneficiary \| Saudi Riyal Loan Facility variable-rate 6.69% due 2027 \| Nonrecourse \| NEOM Green Hydrogen Company \| Other Currency
Debt Instrument [Line Items]
Long-term debt, Principal Amount		$ 131.4
Variable Interest Entity, Primary Beneficiary \| U.S. Dollar Variable Rate Facility, 6.62% due 2027-2053 \| Nonrecourse \| NEOM Green Hydrogen Company
Debt Instrument [Line Items]
Interest rate, variable percentage		6.62%
Variable Interest Entity, Primary Beneficiary \| U.S. Dollar Variable Rate Facility, 6.62% due 2027-2053 \| Nonrecourse \| NEOM Green Hydrogen Company \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Annual margin		1.31%
Variable Interest Entity, Primary Beneficiary \| U.S. Dollar Variable Rate Facility, 6.62% due 2027-2053 \| Nonrecourse \| NEOM Green Hydrogen Company \| Payable in U.S. Dollars
Debt Instrument [Line Items]
Long-term debt, Principal Amount		$ 1,094.9
Variable Interest Entity, Primary Beneficiary \| NEOM Green Hydrogen Project Financing, Primary \| Nonrecourse \| NEOM Green Hydrogen Company
Debt Instrument [Line Items]
Project financing, maximum borrowing capacity	$ 6,100.0
Amount of debt funding, percent	73.00%