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Financial Instruments Cash Flow Hedges (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Effect of Cash Flow Hedges on Results of Operations [Abstract] |  |
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net | $ (0.6) | $ (0.1)

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- Definition The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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