Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	$ 812,850	$ 1,196,238	$ 1,652,818	$ 2,067,612
Loss on derivative instruments	0	(103,068)	0	(423,845)
Gain on sale of assets and other income	1,738	7,887	3,486	10,251
Total revenues and other income	814,588	1,101,057	1,656,304	1,654,018
Revenue from production
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	799,836	1,146,299	1,596,067	1,980,827
Net crude oil and condensate revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	702,103	969,774	1,374,220	1,672,620
Net natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	19,598	41,156	45,960	76,687
Net natural gas revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	78,135	135,369	175,887	231,520
Sales of purchased natural gas
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	13,014	49,939	56,751	86,785
United States Onshore | Net crude oil and condensate revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	177,085	264,841	307,166	436,537
United States Onshore | Net natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	6,540	18,062	14,810	34,747
United States Onshore | Net natural gas revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	4,138	19,034	9,588	30,403
United States Offshore | Net crude oil and condensate revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	480,841	612,526	981,151	1,078,147
United States Offshore | Net natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	11,541	18,093	26,170	32,072
United States Offshore | Net natural gas revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	14,802	43,567	36,934	69,768
United States Offshore | Sales of purchased natural gas
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	0	181	0	181
Canada Onshore | Net crude oil and condensate revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	19,306	40,417	41,258	77,114
Canada Onshore | Net natural gas liquids revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	1,517	5,001	4,980	9,868
Canada Onshore | Net natural gas revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	59,195	72,768	129,365	131,349
Canada Onshore | Sales of purchased natural gas
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	13,014	49,758	56,751	86,604
Canada Offshore | Net crude oil and condensate revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	24,871	38,354	41,001	67,186
Other | Net crude oil and condensate revenue
Disaggregation of Revenue [Line Items]
Total revenue from sales to customers	$ 0	$ 13,636	$ 3,644	$ 13,636