Financial Instruments - Narrative (Details) Bcf in Billions	12 Months Ended		36 Months Ended
	Sep. 30, 2024 USD ($) counterparty Bcf	Dec. 31, 2023 USD ($)	Dec. 31, 2025 USD ($) payment	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency forward contracts duration maximum	6 years
After tax net hedging gains in accumulated other comprehensive income (loss)	$ 55,800,000
After tax net hedging gains reclassified within twelve months	33,300,000
Fair market value of derivative liability with a credit-risk related contingency	0
Hedging collateral deposits	0			$ 0	$ 91,670,000		$ 88,610,000
Foreign Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Hedging notional amount of forecasted transportation costs	$ 51,200,000
Over the Counter Swaps, No Cost Collars and Foreign Currency Forward Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Number of counterparties in which the company holds over-the-counter swap positions | counterparty	19
Number of counterparties in net gain position | counterparty	17
Credit risk exposure per counterparty	$ 5,100,000
Maximum credit risk exposure per counterparty	18,900,000
Collateral received by company	$ 0
Number of counterparties with a common credit-risk related contingency | counterparty	16
California Asset Sale | Forecast
Derivative Instruments, Gain (Loss) [Line Items]
Maximum annual contingent payment			$ 10,000,000
Amount of each incremental contingency payment			1,000,000
Incremental price, exceeding ICE Brent Average Price (in dollars per barrel)			1
California Asset Sale | Present Value of Contingent Consideration
Derivative Instruments, Gain (Loss) [Line Items]
Value of contingent consideration received from sale of assets	$ 700,000			$ 7,300,000		$ 12,600,000
California Asset Sale | Mark to Market of Contingent Consideration
Derivative Instruments, Gain (Loss) [Line Items]
Mark-to-market adjustment for contingent consideration	$ (6,600,000)
California Asset Sale | Minimum
Derivative Instruments, Gain (Loss) [Line Items]
ICE Brent Average (in dollars per barrel)		$ 95
California Asset Sale | Minimum | Forecast
Derivative Instruments, Gain (Loss) [Line Items]
ICE Brent Average (in dollars per barrel)			$ 95
California Asset Sale | Maximum | Forecast
Derivative Instruments, Gain (Loss) [Line Items]
Number of annual contingent payments | payment			3
ICE Brent Average (in dollars per barrel)			$ 105
Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Hedge duration	5 years
Cash Flow Hedges | Natural Gas Bcf
Derivative Instruments, Gain (Loss) [Line Items]
Nonmonetary notional amount of price risk cash flow hedge derivatives, natural gas (in Bcf) | Bcf	349.4