Summary of Significant Accounting Policies - Intangible Assets Acquired in Business Combinations Narrative (Details)	12 Months Ended
	Dec. 31, 2019
Minimum | Trade Names
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	1 year
Minimum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	2 years
Minimum | Acquired technology
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	3 years
Maximum | Trade Names
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	15 years
Maximum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	10 years
Maximum | Acquired technology
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	10 years