Supplemental Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interim Reporting [Line Items]
Revenue from contracts with customers	$ 842,200	$ 953,800	$ 812,900	$ 840,000	$ 986,100	$ 1,166,400	$ 1,196,200	$ 871,400	$ 3,448,854	$ 4,220,140	$ 2,801,215
Income (loss) from continuing operations before income taxes	169,500	356,300	127,300	267,900	282,700	734,000	515,500	(81,900)	921,069	1,450,261	42,891
Income (loss) from continuing operations	140,500	278,200	92,500	214,000	220,800	574,500	410,400	(64,900)	725,148	1,140,797	48,753
Net income including noncontrolling interest	139,700	277,800	91,900	214,300	220,600	574,100	409,500	(65,500)	723,681	1,138,719	47,528
Net income (loss) attributable to Murphy	$ 116,400	$ 255,300	$ 98,300	$ 191,600	$ 199,400	$ 528,300	$ 350,600	$ (113,300)	$ 661,559	$ 965,047	$ (73,664)
Income (loss) from continuing operations per common share
Basic (in USD per share)	$ 0.76	$ 1.64	$ 0.63	$ 1.23	$ 1.28	$ 3.40	$ 2.27	$ (0.73)	$ 4.27	$ 6.23	$ (0.47)
Diluted (in USD per share)	0.75	1.63	0.62	1.22	1.26	3.36	2.24	(0.73)	4.23	6.14	(0.47)
Net income (loss) per common share
Basic (in USD per share)	0.76	1.64	0.63	1.23	1.28	3.40	2.26	(0.73)	4.26	6.22	(0.48)
Diluted (in USD per share)	0.75	1.63	0.62	1.22	1.26	3.36	2.23	(0.73)	4.22	6.13	(0.48)
Cash dividend per Common share (in USD per share)	$ 0.275	$ 0.275	$ 0.275	$ 0.275	$ 0.250	$ 0.250	$ 0.175	$ 0.150	$ 1.100	$ 0.825	$ 0.500
Minimum
Interim Reporting [Line Items]
Income (loss) from continuing operations before income taxes									$ 921,000
Maximum
Interim Reporting [Line Items]
Income (loss) from continuing operations									$ 725,200