Fair Value Measurements - Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	$ 383.0	$ 499.6
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	312.8	401.6
Fair value measured on recurring basis
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure, Total	403.8	519.6
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure, Total	312.8	401.6
Fair value measured on recurring basis \| Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure, Total	131.1	157.4
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure, Total	151.2	165.9
Fair value measured on recurring basis \| Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure, Total	258.7	352.8
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure, Total	154.0	232.0
Fair value measured on recurring basis \| Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure, Total	14.1	9.4
Liabilities, Fair Value Disclosure [Abstract]
Liabilities, Fair Value Disclosure, Total	7.6	3.7
Commodity Contract [Member] \| Fair value measured on recurring basis
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	369.3	467.6
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	301.4	378.7
Commodity Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	131.1	157.4
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	151.2	165.9
Commodity Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	224.2	300.8
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	142.6	209.1
Commodity Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	14.1	9.4
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	7.6	3.7
Interest Rate Contract [Member] \| Fair value measured on recurring basis
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets		2.9
Interest Rate Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets		0.0
Interest Rate Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets		2.9
Interest Rate Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets		0.0
Foreign Exchange Contract [Member] \| Fair value measured on recurring basis
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	13.6	29.1
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	11.4	22.9
Foreign Exchange Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	0.0	0.0
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	0.0	0.0
Foreign Exchange Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	13.6	29.1
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	11.4	22.9
Foreign Exchange Contract [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Gross derivative assets	0.0	0.0
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, before Offset	0.0	0.0
Cash Surrender Value [Member] \| Fair value measured on recurring basis
Assets, Fair Value Disclosure [Abstract]
Investments, Fair Value Disclosure	20.9	20.0
Cash Surrender Value [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Investments, Fair Value Disclosure	0.0	0.0
Cash Surrender Value [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Investments, Fair Value Disclosure	20.9	20.0
Cash Surrender Value [Member] \| Fair value measured on recurring basis \| Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Investments, Fair Value Disclosure	$ 0.0	$ 0.0

Fair value portion of asset recognized for present right to economic benefit.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Fair value of financial and nonfinancial obligations.

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