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Net Income Per Share (TEU) (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Sep. 17, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Earnings Per Share [Abstract] |  |  |  |  |
Tangible equity units issued | 16,500,000 |  |  |  |
Tangible equity units proceeds | $ 800.2 |  |  |  |
Price for basic share (usd per share) | $ 0.3134 |  |  |  |
Price for shares diluted (usd per share) | $ 0.3408 |  |  |  |
Difference amount between basic and diluted net income per share |  | $ 0.01 | $ 0.01 |  |
Net income allocated to PRS |  | $ 0.2 | $ 0.2 | $ 0.3 | $ 0.5

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- Definition Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256 + Details
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