Contingent Earnout Share Liability (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 31, 2020	Jan. 14, 2020	Dec. 31, 2019	Nov. 21, 2019	Nov. 20, 2019	Nov. 19, 2019	Dec. 31, 2018	Dec. 31, 2017
Class A-2 Common Stock | Common Stock
Business Acquisition [Line Items]
Shares issued (in shares)				4,999,999		5,000,000
Class A-1 Common Stock
Business Acquisition [Line Items]
Percentage of ownership requiring exchange (less than)		4.99%			4.99%
Class A-1 Common Stock | Common Stock
Business Acquisition [Line Items]
Shares issued (in shares)	93,379,508		76,637,470	76,637,470			58,491,281	58,459,396
Tranche I - EBITDA for last 12 months or 20 trading days in consecutive 30 day trading period
Business Acquisition [Line Items]
Maximum EBITDA before stock conversion					$ 132
Maximum stock price of common stock before conversion (in usd per share)					$ 12.00
Tranche I - EBITDA for last 12 months or 20 trading days in consecutive 30 day trading period | Class A-2 Common Stock
Business Acquisition [Line Items]
Number of shares converted (in shares)		1,666,666
Tranche II - LTM EBITDA or 20 trading days in consecutive 30 day trading period
Business Acquisition [Line Items]
Maximum EBITDA before stock conversion					$ 152
Maximum stock price of common stock before conversion (in usd per share)					$ 14.00
Tranche II - LTM EBITDA or 20 trading days in consecutive 30 day trading period | Class A-2 Common Stock
Business Acquisition [Line Items]
Number of shares converted (in shares)					1,666,667
Tranche III - LTM EBITDA or 20 trading days in consecutive 30 day trading period
Business Acquisition [Line Items]
Maximum EBITDA before stock conversion					$ 172
Maximum stock price of common stock before conversion (in usd per share)					$ 16.00
Tranche III - LTM EBITDA or 20 trading days in consecutive 30 day trading period | Class A-2 Common Stock
Business Acquisition [Line Items]
Number of shares converted (in shares)		1,666,636			1,666,667