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Rowan Transaction Pro Forma Impact of Rowan Transaction (Details) - Rowan Companies [Member] - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Business Acquisition, Pro Forma Revenue | $ 599.0 |  | $ 1,179.5
Business Acquisition, Pro Forma Net Income (Loss) | $ (271.3) |  | $ (591.8)
Business Acquisition, Pro Forma Earnings Per Share, Basic (usd per share) | $ (1.38) |  | $ (3.02)
Business Combination, Integration Related Costs | $ 71.5 |  | $ 80.8
Bargain purchase gain |  | $ 630.7 | $ 712.8

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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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