Income Taxes - Components of the net operating loss carryforwards (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	$ 122
20-Year Carryforward Expires in 2025-2037
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	72
Indefinite Carryforward Period
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	50
US Federal
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	93
US Federal | 20-Year Carryforward Expires in 2025-2037
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	72
US Federal | Indefinite Carryforward Period
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	21
Foreign
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	29
Foreign | 20-Year Carryforward Expires in 2025-2037
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	0
Foreign | Indefinite Carryforward Period
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	$ 29