Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Abstract]
Other deferred tax assets, net	$ 32.5	$ 28.1
DGI Parent [Member]
Operating Loss Carryforwards [Abstract]
Valuation allowance related to the portion of operating loss carryforwards	$ 7.9
Earliest Tax Year [Member]
Operating Loss Carryforwards [Abstract]
Tax years open for examination	2016
Latest Tax Year [Member]
Operating Loss Carryforwards [Abstract]
Tax years open for examination	2021