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Subsequent Event	12 Months Ended
Subsequent Event	Dec. 31, 2016
Subsequent Event [Abstract]
Subsequent Event	Note U – Subsequent Events In January 2017, a Canadian subsidiary of the Company completed its disposition of the Seal field in Western Canada. Total cash consideration to Murphy upon closing of the transaction was approximately $49.0 million. A $132.4 million pretax gain is expected to be reported in the first quarter of 2017 related to the sale.