Contingent Liabilities (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Legal fees	$ 17	$ 14	$ 17
Pending Litigation | Minimum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	0
Pending Litigation | Maximum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	$ 80