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Discontinued Operations (Notes) | 6 Months Ended
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Jun. 30, 2016
Discontinued Operations and Disposal Groups [Abstract] |
Discontinued Operations | Discontinued Operations The following table summarizes loss from discontinued operations, net, for the three-month and six-month periods ended June 30, 2016 and 2015 (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Revenues | $ | — |  |  | $ | 8.1 |  |  | $ | — |  |  | $ | 17.7 |
Operating expenses | 1.6 |  |  | 11.3 |  |  | 2.4 |  |  | 33.2 |
Operating loss | (1.6 | ) |  | (3.2 | ) |  | (2.4 | ) |  | (15.5 | )
Income tax benefit (expense) | 0.4 |  |  | (2.9 | ) |  | 0.3 |  |  | 9.2 |
Loss on impairment, net | — |  |  | (7.2 | ) |  | — |  |  | (7.2 | )
Gain on disposal of discontinued operations, net | 1.0 |  |  | 3.2 |  |  | 1.0 |  |  | 3.2 |
Loss from discontinued operations, net | $ | (.2 | ) |  | $ | (10.1 | ) |  | $ | (1.1 | ) |  | $ | (10.3 | )
During the second quarter of 2016, we sold ENSCO DS-2, ENSCO 6000 and ENSCO 58 for scrap value resulting in a net pre-tax gain on sale of $1.2 million included in loss from discontinued operations, net, on our condensed consolidated statements of operations. ENSCO 7500 and ENSCO 90 remain classified as held-for-sale on our June 30, 2016 condensed consolidated balance sheet and are included in discontinued operations. For the three-month and six-month periods ended June 30, 2015, loss from discontinued operations, net, included the operating results of ENSCO 93 and ENSCO 58, stacking costs for uncontracted rigs included in discontinued operations, a pre-tax impairment of $7.2 million on ENSCO 6000 and a pre-tax gain of $1.6 million on the sale of ENSCO 5002. A discrete tax benefit of $13.3 million was included in loss from discontinued operations, net, in the first quarter of 2015. Debt and interest expense are not allocated to our discontinued operations.

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- Definition The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721665-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=64862545&loc=SL51724579-110230 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721663-107760 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2941-110230 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721659-107760 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721671-107760 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5D -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721677-107760 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1474-107760 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721683-107760 + Details
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