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Revenue Recognition (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Remaining performance obligation | $ 2,230.0 |  |
Threshold period past due | 60 days |  |
Allowance for doubtful accounts | $ 1.1 |  | $ 1.2
Amortization of deferred contract costs | 31.3 | $ 25.1 |
Service [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Deferred revenue recognized in period | $ 348.9 | $ 288.6 |

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