Leases - Supplemental Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 36	$ 32
Operating cash flows for financing leases	0	5
Financing cash flows for finance leases	1	0
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities	$ 18	$ 19