Commitments and Contingencies - Purchase Commitments (Details) gal in Thousands, bbl in Thousands, $ in Thousands	Mar. 31, 2022 USD ($) gal bbl
Crude oil | Fixed-Price
Purchase commitments for crude oil and natural gas
Purchase obligation, year one	$ 188,915
Purchase obligation, year two	0
Purchase obligation	$ 188,915
Purchase obligation, volume, year one | bbl	1,815
Purchase obligation, volume, year two | bbl	0
Total purchase obligation, volume | bbl	1,815
Crude oil | Index-Price
Purchase commitments for crude oil and natural gas
Purchase obligation, year one	$ 3,875,415
Purchase obligation, year two	2,269,526
Purchase obligation, year three	1,654,300
Purchase obligation, year four	687,824
Purchase obligation	$ 8,487,065
Purchase obligation, volume, year one | bbl	42,808
Purchase obligation, volume, year two | bbl	29,188
Purchase obligation, volume, year three | bbl	22,775
Purchase obligation, volume, year four | bbl	10,410
Total purchase obligation, volume | bbl	105,181
Natural Gas Liquids | Fixed-Price
Purchase commitments for crude oil and natural gas
Purchase obligation, year one	$ 15,619
Purchase obligation, year two	4,588
Purchase obligation	$ 20,207
Purchase obligation, volume, year one | gal	14,280
Purchase obligation, volume, year two | gal	6,048
Total purchase obligation, volume | gal	20,328
Natural Gas Liquids | Index-Price
Purchase commitments for crude oil and natural gas
Purchase obligation, year one	$ 1,428,476
Purchase obligation, year two	20,314
Purchase obligation, year three	0
Purchase obligation, year four	0
Purchase obligation	$ 1,448,790
Purchase obligation, volume, year one | gal	999,240
Purchase obligation, volume, year two | gal	26,327
Purchase obligation, volume, year three | gal	0
Purchase obligation, volume, year four | gal	0
Total purchase obligation, volume | gal	1,025,567