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Contingencies (Details) | 12 Months Ended
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Dec. 31, 2015 USD ($) site
Commitments and Contingencies Disclosure [Abstract] |
Number of Superfund sites for which company may be liable | site | 1
Name of plaintiff | Freeny
Parties jointly and severally liable in litigation | Murphy Oil Corporation and Murphy Oil USA, Inc.
Allegations | the plaintiffs allege that the Company has infringed on their electronic pricing system patent.
Trial or alternative dispute resolution | At trial, and before any judgment was entered for any party, a settlement was reached between the parties and the case was dismissed. The settlement agreement resulted in the Company paying an immaterial amount to the plaintiffs for a license to use their patents for past and future periods
Workers' compensation deductible (per occurrence) | $ 1,000,000
Workers' compensation accrued liability | 18,000,000
Outstanding letters of credit | 17,800,000
Liability accrued | $ 0

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