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Supplemental Quarterly Information (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Supplemental Quarterly Information |
(Millions of dollars except per share amounts) | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Year 1,2
Year ended December 31, 2020 |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 600.6 |  |  | 285.7 |  |  | 425.3 |  |  | 440.1 |  |  | 1,751.7 |
Income (loss) from continuing operations before income taxes | (595.4) |  |  | (417.9) |  |  | (328.4) |  |  | (207.3) |  |  | (1,549.0) |
Income (loss) from continuing operations | (503.8) |  |  | (323.1) |  |  | (265.9) |  |  | (162.5) |  |  | (1,255.3) |
Net income (loss) including noncontrolling interest | (508.7) |  |  | (324.4) |  |  | (266.6) |  |  | (162.7) |  |  | (1,262.4) |
Net income (loss) attributable to Murphy | (416.1) |  |  | (317.2) |  |  | (243.5) |  |  | (171.9) |  |  | (1,148.8) |
Income (loss) from continuing operations per Common share |  |  |  |  |  |  |  |  |
Basic | (2.68) |  |  | (2.05) |  |  | (1.58) |  |  | (1.11) |  |  | (7.43) |
Diluted | (2.68) |  |  | (2.05) |  |  | (1.58) |  |  | (1.11) |  |  | (7.43) |
Net income (loss) per Common share |  |  |  |  |  |  |  |  |
Basic | (2.71) |  |  | (2.06) |  |  | (1.59) |  |  | (1.11) |  |  | (7.48) |
Diluted | (2.71) |  |  | (2.06) |  |  | (1.59) |  |  | (1.11) |  |  | (7.48) |
Cash dividend per Common share | 0.25 |  |  | 0.125 |  |  | 0.125 |  |  | 0.125 |  |  | 0.625 |
Year ended December 31, 2019 |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 629.4 |  |  | 680.4 |  |  | 750.3 |  |  | 757.0 |  |  | 2,817.1 |
Income (loss) from continuing operations before income taxes | 33.7 |  |  | 107.9 |  |  | 177.1 |  |  | (115.3) |  |  | 203.5 |
Income (loss) from continuing operations | 22.9 |  |  | 98.8 |  |  | 158.3 |  |  | (91.3) |  |  | 188.8 |
Net income including noncontrolling interest | 72.8 |  |  | 123.2 |  |  | 1,111.7 |  |  | (54.4) |  |  | 1,253.3 |
Net income attributable to Murphy | 40.2 |  |  | 92.3 |  |  | 1,089.0 |  |  | (71.7) |  |  | 1,149.7 |
Income (loss) from continuing operations per Common share |  |  |  |  |  |  |  |  |
Basic | (0.06) |  |  | 0.40 |  |  | 0.85 |  |  | (0.71) |  |  | 0.52 |
Diluted | (0.06) |  |  | 0.40 |  |  | 0.84 |  |  | (0.70) |  |  | 0.52 |
Net income (loss) per Common share |  |  |  |  |  |  |  |  |
Basic | 0.23 |  |  | 0.55 |  |  | 6.79 |  |  | (0.71) |  |  | 7.01 |
Diluted | 0.23 |  |  | 0.54 |  |  | 6.76 |  |  | (0.47) |  |  | 6.98 |
Cash dividend per Common share | 0.25 |  |  | 0.25 |  |  | 0.25 |  |  | 0.25 |  |  | 1.00 |
1 Revenue from contracts with customers, Income (loss) from continuing operations before income taxes, Income (loss) from continuing operations and Net income (loss) including noncontrolling interest include results attributable to the noncontrolling interest in MP GOM. 2 2020 results include impairment charges of $1,206.3 million as a result of declines in future oil and natural gas prices at the time of impairment (principally driven by reduced demand in response to the COVID-19 pandemic - see Risk Factors).

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306 + Details
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