Leases (Schedule of Lease Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease costs, net	$ 138	$ 132	$ 121
Variable lease costs	40	43	51
Short-term lease costs, net	53	46	46
Amortization of lease assets	11	10	9
Interest on lease liabilities	3	3	3
Total lease cost, net	$ 245	$ 234	$ 230