Organization and Description of the Business (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Mar. 25, 2017	Mar. 31, 2020 USD ($) segment $ / shares shares	Feb. 25, 2019
Business Acquisition [Line Items]
Number of reportable segments (in segments) | segment		3
Ordinary shares repurchased (in shares) | shares		3,230,262
Average price of ordinary shares repurchased (in dollars per share) | $ / shares		$ 5.93
Value of treasury stock acquired using the cost method | $		$ 19.2
BrightSphere Investment Group | Paulson
Business Acquisition [Line Items]
Parent owned interest			21.70%
Parent Company
Business Acquisition [Line Items]
Percent of interest sold	24.95%