Contingencies and Commitments (Cash Flow Information Related To Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Contingencies and Commitments [Abstract]
Operating cash flows from operating leases	$ 40	$ 43	$ 47
Financing cash flows from finance leases	62	53	96
Operating leases	$ 8	$ 10	$ 78