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Revenue Recognition (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Revenue from External Customer [Line Items] |  |
Contract assets | $ 0.0 |
Trade accounts receivable increase | 36.2 |
Deferred revenue | 31.0 |
Deferred Revenue, revenue recognized |  | $ 1.0
Capitalized contract cost, amortization | $ 0.1 |
Contract operations revenue |  |
Revenue from External Customer [Line Items] |  |
Services generally billed in number of months in advance of service commencement | 1 month |
Payment due after receipt of invoice, period | 30 days |
Contract operations revenue | Minimum |  |
Revenue from External Customer [Line Items] |  |
Typical initial contract terms | 6 months |
Contract operations revenue | Maximum |  |
Revenue from External Customer [Line Items] |  |
Typical initial contract terms | 5 years |
Retail parts and services revenue |  |
Revenue from External Customer [Line Items] |  |
Payment due after receipt of invoice, period | 30 days |
Predecessor |  |
Revenue from External Customer [Line Items] |  |
Contract assets |  | 0.0
Capitalized contract cost, costs to fulfill a contract |  | 0.0
Capitalized contract cost, amortization |  | $ 0.0

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