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Segment Information - Narrative (Details)
3 Months Ended
Mar. 31, 2020
employee
segment
Segment Reporting Information [Line Items]  
Number of reportable segments | segment 3
Number of operating segments which do not meet reportable unit quantitative threshold | segment 2
Minimum | Corporate  
Segment Reporting Information [Line Items]  
Customer segments, customer employee headcount | employee 250
Maximum | Small Business  
Segment Reporting Information [Line Items]  
Customer segments, customer employee headcount | employee 250