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Revenue (Narrative) (Details)
$ in Millions
6 Months Ended
Jun. 30, 2019
USD ($)
region
segment
Revenue from Contract with Customer [Abstract]  
Revenue deferred due to unsatisfied performance obligations $ 6.9
Revenue recognized for satisfaction of performance obligations over time $ 6.7
Number of geographic regions in which the Company conducts business | region 3
Number of operating segments | segment 2
Number of reportable segments | segment 2
Contract with Customer, Liability Included In Beginning Balance, Revenue Recognized $ 5.5