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Related-Party Transactions | 12 Months Ended
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Dec. 31, 2015
Related Party Transactions [Abstract] |
Related-Party Transactions | Related-Party Transactions Related-party transactions of the Company include the allocation of certain general and administrative costs from Murphy Oil to the Company and payment of interest expense to or receipt of interest income from Murphy Oil for intercompany payables balances for periods prior to the separation. General and administrative costs were charged by Murphy Oil to the Company based on management’s determination of such costs attributable to the operations of the Company. However, such related-party transactions cannot be presumed to be carried out on an arm’s length basis as the requisite conditions of competitive, free-market dealings may not exist. Prior to the separation, Murphy Oil provided cash management services to the Company. As a result, the Company generally remitted funds received to Murphy Oil, and Murphy Oil paid all operating and capital expenditures on behalf of the Company. Such cash transactions were reflected in the change in the Net Investment by Parent. The Consolidated and Combined Income Statements include expense allocations for certain functions provided to the Company by Murphy Oil prior to the separation. If possible, these allocations were made on a specific identification basis. Otherwise, the expenses related to services provided to the Company by Murphy Oil were allocated to Murphy USA based on relative percentages of headcount or other appropriate methods depending on the nature of each type of cost to be allocated. Charges for functions historically provided to the Company by Murphy Oil were primarily attributable to Murphy Oil’s performance of many shared services that the Company benefited from, such as treasury, tax, accounting, risk management, legal, internal audit, procurement, human resources, investor relations and information technology. Murphy USA also participated in certain Murphy Oil insurance, benefit and incentive plans. The Consolidated and Combined Income Statements reflect charges from Murphy Oil and its other subsidiaries for these services of $0, $0 and $50,975,000 for the three years ended December 31, 2015, 2014 and 2013, respectively. Included in the charges above are amounts recognized for stock-based compensation expense (Note 12). Included in Interest income in the Consolidated and Combined Income Statements for the three years ended December 31, 2015, 2014 and 2013 was interest income from affiliates of $0, $0 and $1,080,000, respectively. These amounts were paid on balances that were previously intercompany prior to the separation from Murphy Oil and were settled in full at the separation date.

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- Definition The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39678-107864 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph b -Article 3A + Details
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