Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 25, 2021	Dec. 31, 2020	Jun. 30, 2021	Dec. 15, 2020
Subsequent Event [Line Items]
Professional fees		$ 8.8
Catalyst Holdings
Subsequent Event [Line Items]
Definitive agreement, price per share (in dollars per share)				$ 35.00
Amount to be paid per share (in dollars per share)				$ 35.00
Subsequent Event | Forecast | NCR
Subsequent Event [Line Items]
Amount to be paid per share (in dollars per share)	$ 39.00		$ 39.00
Subsequent Event | Forecast | NCR | Apollo Global Management
Subsequent Event [Line Items]
Termination fee	$ 32.6