Income Taxes - Components of the net operating loss carryforwards (Details) $ in Millions	Dec. 31, 2021 USD ($)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 422
20-Year Carryforward Expires in 2024-2037
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	195
Indefinite Carryforward Period
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	227
US Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	204
US Federal | 20-Year Carryforward Expires in 2024-2037
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	195
US Federal | Indefinite Carryforward Period
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	9
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	218
Foreign | 20-Year Carryforward Expires in 2024-2037
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0
Foreign | Indefinite Carryforward Period
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 218