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Revenue from Contracts with Customers (Details 3) - USD ($) $ in Millions | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jan. 04, 2019 | Dec. 31, 2018 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Deferred Revenue, Current |  |  | $ 6.1 |  | $ 5.0 |
Deferred Revenue, Noncurrent |  |  | 3.8 |  | 3.5 |
Movement in Deferred Revenue [Roll Forward] |  |  |  |  |  |
Beginning balance | $ 8.5 | $ 7.8 |  |  |  |
Increase in deferred revenue representing our obligation to satisfy future performance obligations | 5.9 | 7.5 |  |  |  |
Deferred Revenue Addition from Acquisition |  |  |  | $ 1.4 |  | $ 0.0
Decrease in deferred revenue for amounts recognized in Net Sales for satisfied performance obligations | (5.9) | (7.0) |  |  |  |
Foreign currency fluctuations | 0.0 | (0.1) |  |  |  |
Ending balance | 9.9 | 8.2 |  |  |  |
Revenue, Performance Obligation Satisfied over Time [Abstract] |  |  |  |  |  |
Remaining 2019 |  |  | 4.8 |  |  |
2020 |  |  | 2.4 |  |  |
2021 |  |  | 1.6 |  |  |
2022 |  |  | 0.8 |  |  |
2023 |  |  | 0.3 |  |  |
Thereafter |  |  | 0.0 |  |  |
Total | $ 8.5 | $ 7.8 | $ 9.9 |  | $ 8.5 | $ 8.2
Prepaid Maintenance Contract Duration, Minimum |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Standard Prepaid Maintenance Contract Time Period | 12 years |  |  |  |  |
Prepaid Maintenance Contract Duration, Maximum |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Standard Prepaid Maintenance Contract Time Period | 60 years |  |  |  |  |

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