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Equity Investees (Narrative) (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
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Equity Method Investments and Joint Ventures [Abstract] |  |
Unamortized excess cost amount | $ 362.5 | $ 366.4

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- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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Period Type: | instant

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- References No definition available. + Details
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