Income Taxes - Narrative (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits	$ 0	$ 0
Federal
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	600,000,000	2,600,000,000
Operating loss carryforwards, valuation allowance	7,000,000	7,000,000
State
Tax Credit Carryforward [Line Items]
Operating loss carryforwards, valuation allowance	$ 2,000,000	$ 2,000,000