Commitments and Contingencies - Investigations (Details) - Investigations by U.S. Securities and Exchange Commission (SEC) and U.S. Department of Justice (DOJ) - Settled Litigation - USD ($) $ in Millions	1 Months Ended
	Aug. 31, 2019	Jul. 31, 2019
Loss Contingencies [Line Items]
Combined payment as part of settlement with the SEC	$ 11.8
Estimated legal reserve		$ 12.0