Leases - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Lease assets	$ 196	$ 208
Lease liabilities	$ 160	$ 188
Cumulative Effect, Period of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
Lease assets			$ 68
Lease liabilities			$ 66
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	2 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	5 years