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Unaudited Quarterly Financial Data | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Data [Abstract] |
Unaudited Quarterly Financial Data | UNAUDITED QUARTERLY FINANCIAL DATA The following tables summarize our unaudited quarterly consolidated income statement data for the years ended December 31, 2015 and 2014 (in millions, except per share amounts):
2015 | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Year
Operating revenues | $ | 1,163.9 |  |  | $ | 1,059.0 |  |  | $ | 1,012.2 |  |  | $ | 828.3 |  |  | $ | 4,063.4 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |  |  |
Contract drilling (exclusive of depreciation) | 518.3 |  |  | 502.6 |  |  | 433.5 |  |  | 415.2 |  |  | 1,869.6 |
Loss on impairment | — |  |  | — |  |  | 2.4 |  |  | 2,744.0 |  |  | 2,746.4 |
Depreciation | 137.1 |  |  | 140.5 |  |  | 145.2 |  |  | 149.7 |  |  | 572.5 |
General and administrative | 30.1 |  |  | 29.7 |  |  | 28.4 |  |  | 30.2 |  |  | 118.4 |
Operating income (loss) | 478.4 |  |  | 386.2 |  |  | 402.7 |  |  | (2,510.8 | ) |  | (1,243.5 | )
Other expense, net | (72.6 | ) |  | (55.4 | ) |  | (52.4 | ) |  | (47.3 | ) |  | (227.7 | )
Income (loss) from continuing operations before income taxes | 405.8 |  |  | 330.8 |  |  | 350.3 |  |  | (2,558.1 | ) |  | (1,471.2 | )
Income tax expense (benefit) | 77.7 |  |  | 58.0 |  |  | 33.2 |  |  | (182.8 | ) |  | (13.9 | )
Income (loss) from continuing operations | 328.1 |  |  | 272.8 |  |  | 317.1 |  |  | (2,375.3 | ) |  | (1,457.3 | )
Loss from discontinued operations, net | (.2 | ) |  | (10.1 | ) |  | (23.3 | ) |  | (95.0 | ) |  | (128.6 | )
Net income (loss) | 327.9 |  |  | 262.7 |  |  | 293.8 |  |  | (2,470.3 | ) |  | (1,585.9 | )
Net income attributable to noncontrolling interests | (3.2 | ) |  | (2.4 | ) |  | (1.8 | ) |  | (1.5 | ) |  | (8.9 | )
Net income (loss) attributable to Ensco | $ | 324.7 |  |  | $ | 260.3 |  |  | $ | 292.0 |  |  | $ | (2,471.8 | ) |  | $ | (1,594.8 | )
Earnings (loss) per share – basic and diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations | $ | 1.38 |  |  | $ | 1.15 |  |  | $ | 1.34 |  |  | $ | (10.23 | ) |  | $ | (6.33 | )
Discontinued operations | — |  |  | (0.04 | ) |  | (0.10 | ) |  | (0.41 | ) |  | (0.55 | )
| $ | 1.38 |  |  | $ | 1.11 |  |  | $ | 1.24 |  |  | $ | (10.64 | ) |  | $ | (6.88 | )
2014 | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Year
Operating revenues | $ | 1,066.7 |  |  | $ | 1,136.6 |  |  | $ | 1,201.4 |  |  | $ | 1,159.8 |  |  | $ | 4,564.5 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |  |  |
Contract drilling (exclusive of depreciation) | 520.2 |  |  | 542.5 |  |  | 500.2 |  |  | 514.0 |  |  | 2,076.9 |
Loss on Impairment | — |  |  | 703.5 |  |  | — |  |  | 3,515.2 |  |  | 4,218.7 |
Depreciation | 131.1 |  |  | 132.2 |  |  | 135.2 |  |  | 139.4 |  |  | 537.9 |
General and administrative | 38.1 |  |  | 36.2 |  |  | 29.3 |  |  | 28.3 |  |  | 131.9 |
Operating income (loss) | 377.3 |  |  | (277.8 | ) |  | 536.7 |  |  | (3,037.1 | ) |  | (2,400.9 | )
Other expense, net | (29.1 | ) |  | (30.8 | ) |  | (38.4 | ) |  | (49.6 | ) |  | (147.9 | )
Income (loss) from continuing operations before income taxes | 348.2 |  |  | (308.6 | ) |  | 498.3 |  |  | (3,086.7 | ) |  | (2,548.8 | )
Income tax expense (benefit) | 49.5 |  |  | 42.6 |  |  | 74.6 |  |  | (26.2 | ) |  | 140.5 |
Income (loss) from continuing operations | 298.7 |  |  | (351.2 | ) |  | 423.7 |  |  | (3,060.5 | ) |  | (2,689.3 | )
(Loss) income from discontinued operations, net | (2.0 | ) |  | (818.4 | ) |  | 9.2 |  |  | (388.0 | ) |  | (1,199.2 | )
Net income (loss) | 296.7 |  |  | (1,169.6 | ) |  | 432.9 |  |  | (3,448.5 | ) |  | (3,888.5 | )
Net income attributable to noncontrolling interests | (4.2 | ) |  | (3.1 | ) |  | (3.5 | ) |  | (3.3 | ) |  | (14.1 | )
Net income (loss) attributable to Ensco | $ | 292.5 |  |  | $ | (1,172.7 | ) |  | $ | 429.4 |  |  | $ | (3,451.8 | ) |  | $ | (3,902.6 | )
Earnings (loss) per share – basic and diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations | $ | 1.26 |  |  | $ | (1.53 | ) |  | $ | 1.79 |  |  | $ | (13.22 | ) |  | $ | (11.70 | )
Discontinued operations | (0.01 | ) |  | (3.54 | ) |  | 0.04 |  |  | (1.67 | ) |  | (5.18 | )
| $ | 1.25 |  |  | $ | (5.07 | ) |  | $ | 1.83 |  |  | $ | (14.89 | ) |  | $ | (16.88 | )

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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