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Business Acquisition (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Jun. 07, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 5,749.2 |  | $ 5,706.4
Nightstar |  |  |
Business Acquisition [Line Items] |  |  |
Cash and Equivalents |  | $ 107.8 |
Marketable Securities |  | 7.5 |
In-process research and development |  | 700.0 |
Goodwill |  | 112.6 |
Deferred Tax Liability |  | (77.0) |
Other, net |  | 1.3 |
Total purchase price |  | $ 852.2 |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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