Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principle - Estimated Useful Life of Property, Plant and Equipment (Details)	12 Months Ended
Dec. 31, 2019
Computer hardware
Property and Equipment [Line Items]
Useful life	3 years
Computer software
Property and Equipment [Line Items]
Useful life	1 year
Internal-use software development costs
Property and Equipment [Line Items]
Useful life	5 years
Minimum \| Furniture and equipment
Property and Equipment [Line Items]
Useful life	3 years
Maximum \| Furniture and equipment
Property and Equipment [Line Items]
Useful life	7 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration