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Unaudited Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Data [Abstract] |
Summary Of Unaudited Quarterly Consolidated Income Statement | 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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