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Derivative And Credit-Related Financial Instruments (Schedule Of Net Gains Recognized In Income On Customer-Initiated Derivatives) (Details) - Customer-initiated and other activities - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net gains recognized in income on customer-initiated derivative instruments	$ 109	$ 99	$ 67
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net gains recognized in income on customer-initiated derivative instruments	34	36	26
Energy Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net gains recognized in income on customer-initiated derivative instruments	28	18	1
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net gains recognized in income on customer-initiated derivative instruments	$ 47	$ 45	$ 40