Summary of Significant Accounting Polices and Adoption of New Accounting Pronouncements (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($) investment
Accounting Policies [Abstract]
Fair value, option, number of investments | investment	46
Accrued performance fees	$ 110.7
Cash collected on performance fees	$ 9.6
Performance fees retained, percentage	35.00%