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REVENUE Contract Assets and Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
Contract with Customer, Asset and Liability [Abstract] |  |  |
Short-term contract asset (see Note 2) | $ 25.8 | $ 43.2 | $ 0.0
Current Contract Assets, Percentage Change from Prior Period | (40.30%) |  |
Contract with Customer, Asset, Net, Noncurrent | $ 0.7 | 0.0 |
Noncurrent Contract Assets, Percentage Change from Prior Period | 100.00% |  |
Contract with Customer, Liability | $ (57.5) | (61.7) |
Current Contract Liabilities, Percentage Change from Prior Period | (6.80%) |  |
Net Contract Liabilities | $ (31.0) | $ (18.5) |
Net Contract Liability, Change from Prior Year | $ (12.5) |  |
Net Contract Liability, Percentage Change from Prior Period | 67.60% |  |

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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, classified as current. + References Reference 1: 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 2: 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 + Details
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