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Revenue Recognition - Schedule Of Contract Assets And Liabilities (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2018 USD ($)
Change in Contract with Customer, Asset [Roll Forward] |
Balance as of December 31, 2017 | $ 5.8
Decrease due to transfer to receivables during the period | (0.6)
Balance as of March 31, 2018 | 5.2
Change in Contract with Customer, Liability [Roll Forward] |
Balance as of December 31, 2017 | 123.1
Increase due to cash received | 24.6
Decrease due to amortization of deferred revenue that was included in the beginning contract liability balance | (24.8)
Decrease due to amortization of deferred revenue that was added during the period | (2.8)
Balance as of March 31, 2018 | $ 120.1

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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130549-203045 + Details
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