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Segment Information | 6 Months Ended
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Jun. 30, 2017
Segment Reporting Information, Revenue for Reportable Segment [Abstract] |
Segment Information | Segment Information Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling. Segment information for the three-month and six-month periods ended 2017 and 2016 is presented below (in millions). General and administrative expense and depreciation expense incurred by our corporate office are not allocated to our operating segments for purposes of measuring segment operating income and are included in "Reconciling Items." We measure segment assets as property and equipment. Three Months Ended June 30, 2017
| Floaters |  | Jackups |  | Other |  | Operating Segments Total |  | Reconciling Items |  | Consolidated Total
Revenues | $ | 264.0 |  |  | $ | 178.9 |  |  | $ | 14.6 |  |  | $ | 457.5 |  |  | $ | — |  |  | $ | 457.5 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Contract drilling (exclusive of depreciation) | 145.6 |  |  | 132.3 |  |  | 13.4 |  |  | 291.3 |  |  | — |  |  | 291.3 |
Depreciation | 72.0 |  |  | 31.6 |  |  | — |  |  | 103.6 |  |  | 4.3 |  |  | 107.9 |
General and administrative | — |  |  | — |  |  | — |  |  | — |  |  | 30.5 |  |  | 30.5 |
Operating income | $ | 46.4 |  |  | $ | 15.0 |  |  | $ | 1.2 |  |  | $ | 62.6 |  |  | $ | (34.8 | ) |  | $ | 27.8 |
Property and equipment, net | $ | 8,493.2 |  |  | $ | 2,515.3 |  |  | $ | — |  |  | $ | 11,008.5 |  |  | $ | 50.5 |  |  | $ | 11,059.0 |
Three Months Ended June 30, 2016
| Floaters |  | Jackups |  | Other |  | Operating Segments Total |  | Reconciling Items |  | Consolidated Total
Revenues | $ | 636.4 |  |  | $ | 251.3 |  |  | $ | 21.9 |  |  | $ | 909.6 |  |  | $ | — |  |  | $ | 909.6 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Contract drilling (exclusive of depreciation) | 208.6 |  |  | 122.3 |  |  | 19.3 |  |  | 350.2 |  |  | — |  |  | 350.2 |
Depreciation | 77.8 |  |  | 30.1 |  |  | — |  |  | 107.9 |  |  | 4.5 |  |  | 112.4 |
General and administrative | — |  |  | — |  |  | — |  |  | — |  |  | 27.4 |  |  | 27.4 |
Operating income | $ | 350.0 |  |  | $ | 98.9 |  |  | $ | 2.6 |  |  | $ | 451.5 |  |  | $ | (31.9 | ) |  | $ | 419.6 |
Property and equipment, net | $ | 8,414.1 |  |  | $ | 2,543.0 |  |  | $ | — |  |  | $ | 10,957.1 |  |  | $ | 64.1 |  |  | $ | 11,021.2 |
Six Months Ended June 30, 2017
| Floaters |  | Jackups |  | Other |  | Operating Segments Total |  | Reconciling Items |  | Consolidated Total
Revenues | $ | 548.8 |  |  | $ | 350.7 |  |  | $ | 29.1 |  |  | $ | 928.6 |  |  | $ | — |  |  | $ | 928.6 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Contract drilling (exclusive of depreciation) | 292.0 |  |  | 250.9 |  |  | 26.5 |  |  | 569.4 |  |  | — |  |  | 569.4 |
Depreciation | 144.8 |  |  | 63.7 |  |  | — |  |  | 208.5 |  |  | 8.6 |  |  | 217.1 |
General and administrative | — |  |  | — |  |  | — |  |  | — |  |  | 56.5 |  |  | 56.5 |
Operating income | $ | 112.0 |  |  | $ | 36.1 |  |  | $ | 2.6 |  |  | $ | 150.7 |  |  | $ | (65.1 | ) |  | $ | 85.6 |
Property and equipment, net | $ | 8,493.2 |  |  | $ | 2,515.3 |  |  | $ | — |  |  | $ | 11,008.5 |  |  | $ | 50.5 |  |  | $ | 11,059.0 |
Six Months Ended June 30, 2016
| Floaters |  | Jackups |  | Other |  | Operating Segments Total |  | Reconciling Items |  | Consolidated Total
Revenues | $ | 1,149.0 |  |  | $ | 529.2 |  |  | $ | 45.4 |  |  | $ | 1,723.6 |  |  | $ | — |  |  | $ | 1,723.6 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Contract drilling (exclusive of depreciation) | 419.9 |  |  | 256.8 |  |  | 37.2 |  |  | 713.9 |  |  | — |  |  | 713.9 |
Depreciation | 158.1 |  |  | 58.7 |  |  | — |  |  | 216.8 |  |  | 8.9 |  |  | 225.7 |
General and administrative | — |  |  | — |  |  | — |  |  | — |  |  | 50.8 |  |  | 50.8 |
Operating income | $ | 571.0 |  |  | $ | 213.7 |  |  | $ | 8.2 |  |  | $ | 792.9 |  |  | $ | (59.7 | ) |  | $ | 733.2 |
Property and equipment, net | $ | 8,414.1 |  |  | $ | 2,543.0 |  |  | $ | — |  |  | $ | 10,957.1 |  |  | $ | 64.1 |  |  | $ | 11,021.2 |
Information about Geographic Areas As of June 30, 2017, the geographic distribution of our drilling rigs by reportable segment was as follows:
| Floaters |  | Jackups |  | Total(1)
North & South America | 8 |  | 5 |  | 13
Europe & Mediterranean | 6 |  | 11 |  | 17
Middle East & Africa | 1 |  | 11 |  | 12
Asia & Pacific Rim | 4 |  | 5 |  | 9
Asia & Pacific Rim (under construction) | 1 |  | 1 |  | 2
Held-for-sale | 1 |  | 1 |  | 2
Total | 21 |  | 34 |  | 55
(1) | We provide management services on two rigs owned by third-parties not included in the table above.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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