Leases - Other operating lease liability information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Cash paid for lease liabilities reported in operating cash flows	$ 43	$ 50	$ 49
Right-of-use assets obtained under new leases	$ 10	$ 25	$ 19