Income Taxes - Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Interest limitation carry forwards	$ 66	$ 20
R&D and state credit carry forwards	48	$ 42
Federal
Operating Loss Carryforwards [Line Items]
NOL carry forwards	1,240
Interest limitation carry forwards	240
R&D and state credit carry forwards	49
State
Operating Loss Carryforwards [Line Items]
NOL carry forwards	1,335
Interest limitation carry forwards	269
R&D and state credit carry forwards	1
Foreign
Operating Loss Carryforwards [Line Items]
NOL carry forwards	110
Interest limitation carry forwards	0
R&D and state credit carry forwards	$ 0