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Revenues from Contracts (Remaining Performance Obligations Narrative) (Details)
$ in Millions
Jun. 30, 2020
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligations $ 3,528.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligations, percentage 58.00%
Remaining performance obligations, expected timing of satisfaction 12 months