Commitments and Contingent Liabilities (Details 3) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Lease assets and liabilities
Weighted average remaining lease term	5 years	5 years
Weighted average discount rates	1.60%	1.90%
Other assets
Lease assets and liabilities
Right-of-use assets	$ 21	$ 23
Other liabilities
Lease assets and liabilities
Lease liabilities	$ 21	$ 24