Guarantees and Commitments (Schedule of Guarantor Obligations) (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Guarantor Obligations [Line Items]
Standby letters of credit and other guarantees	$ 1,000,000	$ 3,000,000
Cash collateral received for standby letters of credit	12,000,000
Maximum
Guarantor Obligations [Line Items]
Standby letters of credit and other guarantees	$ 272,000,000	$ 234,000,000