Quarterly Financial Data - Schedule Of Quarterly Financial Data (Detail) - USD ($)	3 Months Ended																12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effect of Fourth Quarter Events [Line Items]
Sale of Canadian subsidiary and assets																	$ (16,860,000)	$ 0	$ 0
Estimated litigation liability, after tax																			$ 37,000,000.0
Diluted eps estimated litigation settlement																			$ 0.10
Diluted EPS impact from sale of Canadian assets	$ 0.05
Loss on extinguishment of debt	0	[1]	$ 4,584,000	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ 7,133,000	[1]	$ 0	[1]	$ 0	[1]	4,584,000	7,133,000	$ 554,000
Net income (loss)	194,108,000	[2]	157,422,000		236,450,000		186,493,000		199,121,000		314,169,000		242,464,000		233,946,000		774,473,000	989,700,000	789,447,000
Total revenues	1,195,134,000	[3]	1,104,197,000	[3]	1,208,382,000	[3]	1,124,234,000	[3]	1,149,294,000	[3]	1,282,151,000	[3]	1,137,113,000	[3]	1,141,028,000	[3]	4,631,947,000	4,709,586,000	3,120,828,000
Gain (loss) on derivative instruments, net	4,436,000	[3]	(1,195,000)	[3]	(53,448,000)	[3]	1,124,000	[3]	19,394,000	[3]	2,025,000	[3]	12,685,000	[3]	(10,174,000)	[3]	(49,083,000)	23,930,000	(91,647,000)
Property impairments	19,348,000	[4]	20,199,000	[4]	21,339,000	[4]	25,316,000	[4]	38,494,000	[4]	23,770,000	[4]	29,162,000	[4]	33,784,000	[4]	86,202,000	125,210,000	237,370,000
Litigation settlement																	0	0	59,600,000
Gain (Loss) on Disposition of Property Plant Equipment	1,182,000	[5]	(535,000)	[5]	(364,000)	[5]	252,000	[5]	8,410,000	[5]	1,510,000	[5]	6,710,000	[5]	41,000	[5]	(535,000)	(16,671,000)	(55,124,000)
Income from operations	293,876,000		278,724,000		379,847,000		304,965,000		330,414,000		491,308,000		391,276,000		380,722,000		1,257,412,000	1,593,720,000	449,401,000
Tax benefit from US tax reform legislation																	0	0	(713,655,000)
Net income (loss) attributable to Continental Resources	$ 193,946,000	[2]	$ 158,162,000		$ 236,557,000		$ 186,976,000		$ 197,738,000		$ 314,169,000		$ 242,464,000		$ 233,946,000		$ 775,641,000	$ 988,317,000	$ 789,447,000
Net income per share: Basic	$ 0.53	[2]	$ 0.43		$ 0.63		$ 0.50		$ 0.53		$ 0.84		$ 0.65		$ 0.63		$ 2.09	$ 2.66	$ 2.13
Net income per share: Diluted	$ 0.53	[2]	$ 0.43		$ 0.63		$ 0.50		$ 0.53		$ 0.84		$ 0.65		$ 0.63		$ 2.08	$ 2.64	$ 2.11

[1] See Note 7. Long-Term Debt for discussion of the losses recognized by the Company upon the partial redemptions of its 2022 Notes in the 2019 third quarter and 2018 third quarter.

[2] In the fourth quarter of 2019, the Company sold its Canadian subsidiary and associated properties and a $16.9 million ($0.05 per basic and diluted share) decrease in income tax expense and corresponding increase in net income was recognized as discussed in Note 9. Income Taxes

[3] Gains and losses on natural gas derivative instruments are reflected in “Total revenues” on both the consolidated statements of comprehensive income and this table of unaudited quarterly financial data. Commodity price fluctuations each quarter can result in significant swings in mark-to-market gains and losses, which affects comparability between periods.

[4] Property impairments have been shown separately to illustrate the impact on quarterly results attributable to write downs of the Company’s assets. Commodity price fluctuations each quarter can result in significant changes in estimated future cash flows and resulting impairments, which affects comparability between periods.

[5] Gains and losses on asset sales have been shown separately to illustrate the impact on quarterly results attributable to asset dispositions, which differ in significance from period to period and affect comparability. See Note 16. Property Dispositions for a discussion of notable dispositions.