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Rowan Transaction Pro Forma Impact of the Rowan Transaction (Details) - Rowan Companies [Member] - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Business Acquisition [Line Items] |  |
Business Acquisition, Transaction Costs | $ 9.4 |
Business Acquisition, Pro Forma Revenue | 580.4 | $ 628.2
Business Acquisition, Pro Forma Net Income (Loss) | $ (271.6) | $ (191.4)
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ (1.38) | $ (0.97)

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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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