Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating Revenues and Other
Total	$ 4,303,455	$ 4,781,624	$ 13,059,727	$ 12,700,863
Operating Expenses
Lease and Well	348,883	321,568	1,032,455	936,236
Transportation Costs	199,365	196,027	549,988	550,781
Gathering and Processing Costs	127,549	114,063	351,487	324,577
Exploration Costs	34,540	32,823	103,386	115,137
Dry Hole Costs	24,138	358	28,001	5,260
Impairments	105,275	44,617	289,761	160,934
Marketing Costs	1,343,293	1,326,974	4,114,265	3,853,827
Depreciation, Depletion and Amortization	953,597	918,180	2,790,496	2,515,445
General and Administrative	135,758	111,284	364,210	310,065
Taxes Other Than Income	203,098	209,043	600,418	582,395
Total	3,475,496	3,274,937	10,224,467	9,354,657
Operating Income	827,959	1,506,687	2,835,260	3,346,206
Other Income (Expense), Net	9,118	3,308	23,233	(4,516)
Income Before Interest Expense and Income Taxes	837,077	1,509,995	2,858,493	3,341,690
Interest Expense
Interest Expense, Net	39,620	63,632	144,434	189,032
Income Before Income Taxes	797,457	1,446,363	2,714,059	3,152,658
Income Tax Provision	182,335	255,411	615,670	626,386
Net Income	$ 615,122	$ 1,190,952	$ 2,098,389	$ 2,526,272
Net Income Per Share
Basic	$ 1.06	$ 2.06	$ 3.63	$ 4.38
Diluted	$ 1.06	$ 2.05	$ 3.61	$ 4.35
Average Number of Common Shares
Basic	577,839	577,254	577,498	576,431
Diluted	581,271	581,559	581,190	580,442
Other Comprehensive Income (Loss)
Foreign Currency Translation Adjustments	$ 833	$ (1,952)	$ (2,616)	$ (179)
Other, Net of Tax	6	6	18	18
Other Comprehensive Income (Loss)	839	(1,946)	(2,598)	(161)
Comprehensive Income	615,961	1,189,006	2,095,791	2,526,111
Crude Oil and Condensate
Operating Revenues and Other
Revenues	2,418,989	2,655,278	7,148,258	7,134,114
Natural Gas Liquids
Operating Revenues and Other
Revenues	164,736	353,704	569,748	861,473
Natural Gas
Operating Revenues and Other
Revenues	269,625	311,713	874,489	912,324
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts
Operating Revenues and Other
Revenues	85,902	(52,081)	242,622	(297,735)
Gathering, Processing and Marketing
Operating Revenues and Other
Revenues	1,334,450	1,360,992	4,121,490	3,899,250
Gains (Losses) on Asset Dispositions, Net
Operating Revenues and Other
Revenues	(523)	115,944	3,650	94,658
Other, Net
Operating Revenues and Other
Revenues	$ 30,276	$ 36,074	$ 99,470	$ 96,779