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Business Combinations - Schedule of Identifiable Finite-lived Intangible Assets Acquired and Estimated Weighted Average Useful Lives (Details) - HelloSign Inc.
$ in Millions
Feb. 08, 2019
USD ($)
Business Acquisition [Line Items]  
Estimated fair values $ 44.6
Estimated weighted average useful lives (In years) 4 years 10 months 24 days
Customer relationships  
Business Acquisition [Line Items]  
Estimated fair values $ 20.5
Estimated weighted average useful lives (In years) 4 years 10 months 24 days
Developed technology  
Business Acquisition [Line Items]  
Estimated fair values $ 19.6
Estimated weighted average useful lives (In years) 5 years
Trade name  
Business Acquisition [Line Items]  
Estimated fair values $ 4.5
Estimated weighted average useful lives (In years) 5 years