Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Revenues and Other
Total	$ 4,058,642	$ 3,681,162
Operating Expenses
Lease and Well	336,291	300,064
Transportation Costs	176,522	176,957
Gathering and Processing Costs	111,295	101,345
Exploration Costs	36,324	34,836
Dry Hole Costs	94	0
Impairments	72,356	64,609
Marketing Costs	1,270,057	1,106,390
Depreciation, Depletion and Amortization	879,595	748,591
General and Administrative	106,672	94,698
Taxes Other Than Income	192,906	179,084
Total	3,182,112	2,806,574
Operating Income	876,530	874,588
Other Income, Net	5,612	727
Income Before Interest Expense and Income Taxes	882,142	875,315
Interest Expense
Interest Expense, Net	54,906	61,956
Income Before Income Taxes	827,236	813,359
Income Tax Provision	191,810	174,770
Net Income	$ 635,426	$ 638,589
Net Income Per Share
Basic	$ 1.10	$ 1.11
Diluted	$ 1.10	$ 1.10
Average Number of Common Shares
Basic	577,207	575,775
Diluted	580,222	579,726
Other Comprehensive Income (Loss)
Foreign Currency Translation Adjustments	$ (1,784)	$ 5,002
Other, Net of Tax	6	6
Other Comprehensive Income (Loss)	(1,778)	5,008
Comprehensive Income	633,648	643,597
Crude Oil and Condensate
Operating Revenues and Other
Revenues	2,200,403	2,101,308
Natural Gas Liquids
Operating Revenues and Other
Revenues	218,638	221,415
Natural Gas
Operating Revenues and Other
Revenues	334,972	299,766
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts
Operating Revenues and Other
Revenues	(20,580)	(59,771)
Gathering, Processing and Marketing
Operating Revenues and Other
Revenues	1,285,654	1,101,822
Gains (Losses) on Asset Dispositions, Net
Operating Revenues and Other
Revenues	(3,836)	(14,969)
Other, Net
Operating Revenues and Other
Revenues	$ 43,391	$ 31,591