Supplemental Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Revenue from contracts with customers	$ 986,100	$ 1,166,400	$ 1,196,200	$ 871,400	$ 762,300	$ 687,600	$ 758,800	$ 592,500	$ 4,220,140	$ 2,801,215	$ 1,751,709
Income (loss) from continuing operations before income taxes	282,700	734,000	515,500	(81,900)	261,300	174,900	(38,100)	(355,200)	1,450,261	42,891	(1,549,035)
Income (loss) from continuing operations	220,800	574,500	410,400	(64,900)	204,700	138,000	(26,900)	(267,000)	1,140,797	48,753	(1,255,294)
Net income (loss) including noncontrolling interest	220,600	574,100	409,500	(65,500)	204,000	137,300	(27,000)	(266,800)	1,138,719	47,528	(1,262,445)
Net income (loss) attributable to Murphy	$ 199,400	$ 528,300	$ 350,600	$ (113,300)	$ 168,400	$ 108,400	$ (63,100)	$ (287,400)	$ 965,047	$ (73,664)	$ (1,148,777)
Income (loss) from continuing operations per Common share ²
Basic (in USD per share)	$ 1.28	$ 3.40	$ 2.27	$ (0.73)	$ 1.09	$ 0.70	$ (0.41)	$ (1.87)	$ 6.23	$ (0.47)	$ (7.43)
Diluted (in USD per share)	1.26	3.36	2.24	(0.73)	1.08	0.70	(0.41)	(1.87)	6.14	(0.47)	(7.43)
Net income (loss) per Common share ²
Basic (in USD per share)	1.28	3.40	2.26	(0.73)	1.09	0.70	(0.41)	(1.87)	6.22	(0.48)	(7.48)
Diluted (in USD per share)	1.26	3.36	2.23	(0.73)	1.09	0.70	(0.41)	(1.87)	6.13	(0.48)	(7.48)
Cash dividend per Common share (in USD per share)	$ 0.250	$ 0.250	$ 0.175	$ 0.150	$ 0.125	$ 0.125	$ 0.125	$ 0.125	$ 0.825	$ 0.500	$ 0.625