Fair Value Measurements - Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Assets:
Gross derivative assets	$ 2,513.4	$ 773.6
Liabilities:
Gross derivative liabilities	2,427.3	748.5
Fair value measured on recurring basis
Assets:
Total assets at fair value	2,526.8	788.3
Liabilities:
Total liabilities at fair value	2,427.3	748.5
Fair value measured on recurring basis | Level 1 Inputs
Assets:
Total assets at fair value	1,499.2	513.3
Liabilities:
Total liabilities at fair value	1,076.4	361.5
Fair value measured on recurring basis | Level 2 Inputs
Assets:
Total assets at fair value	1,018.8	272.3
Liabilities:
Total liabilities at fair value	1,343.9	383.2
Fair value measured on recurring basis | Level 3 Inputs
Assets:
Total assets at fair value	8.8	2.6
Liabilities:
Total liabilities at fair value	7.0	3.8
Commodity contracts | Fair value measured on recurring basis
Assets:
Gross derivative assets	2,459.7	763.5
Liabilities:
Gross derivative liabilities	2,404.1	743.9
Commodity contracts | Fair value measured on recurring basis | Level 1 Inputs
Assets:
Gross derivative assets	1,499.2	513.3
Liabilities:
Gross derivative liabilities	1,076.4	361.5
Commodity contracts | Fair value measured on recurring basis | Level 2 Inputs
Assets:
Gross derivative assets	951.7	247.6
Liabilities:
Gross derivative liabilities	1,320.7	378.6
Commodity contracts | Fair value measured on recurring basis | Level 3 Inputs
Assets:
Gross derivative assets	8.8	2.6
Liabilities:
Gross derivative liabilities	7.0	3.8
Interest rate contracts | Fair value measured on recurring basis
Assets:
Gross derivative assets	19.3	5.4
Liabilities:
Gross derivative liabilities		0.3
Interest rate contracts | Fair value measured on recurring basis | Level 1 Inputs
Assets:
Gross derivative assets	0.0	0.0
Liabilities:
Gross derivative liabilities		0.0
Interest rate contracts | Fair value measured on recurring basis | Level 2 Inputs
Assets:
Gross derivative assets	19.3	5.4
Liabilities:
Gross derivative liabilities		0.3
Interest rate contracts | Fair value measured on recurring basis | Level 3 Inputs
Assets:
Gross derivative assets	0.0	0.0
Liabilities:
Gross derivative liabilities		0.0
Foreign currency contracts | Fair value measured on recurring basis
Assets:
Gross derivative assets	34.4	4.7
Liabilities:
Gross derivative liabilities	23.2	4.3
Foreign currency contracts | Fair value measured on recurring basis | Level 1 Inputs
Assets:
Gross derivative assets	0.0	0.0
Liabilities:
Gross derivative liabilities	0.0	0.0
Foreign currency contracts | Fair value measured on recurring basis | Level 2 Inputs
Assets:
Gross derivative assets	34.4	4.7
Liabilities:
Gross derivative liabilities	23.2	4.3
Foreign currency contracts | Fair value measured on recurring basis | Level 3 Inputs
Assets:
Gross derivative assets	0.0	0.0
Liabilities:
Gross derivative liabilities	0.0	0.0
Cash surrender value of life insurance | Fair value measured on recurring basis
Assets:
Cash surrender value of life insurance	13.4	14.6
Cash surrender value of life insurance | Fair value measured on recurring basis | Level 1 Inputs
Assets:
Cash surrender value of life insurance	0.0	0.0
Cash surrender value of life insurance | Fair value measured on recurring basis | Level 2 Inputs
Assets:
Cash surrender value of life insurance	13.4	14.6
Cash surrender value of life insurance | Fair value measured on recurring basis | Level 3 Inputs
Assets:
Cash surrender value of life insurance	$ 0.0	$ 0.0