Servicing of Financial Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Amount	$ 988		$ 988			$ 1,007
Residential Mortgage
Servicing Assets at Fair Value [Line Items]
Servicing related fees and other ancillary income	47	$ 46	94	$ 90
Servicing Asset at Fair Value, Amount	988	1,020	988	1,020	$ 979	1,007	$ 1,026	$ 906
Commercial Real Estate
Servicing Assets at Fair Value [Line Items]
Servicing related fees and other ancillary income	7	13	5	12
Servicing Asset at Fair Value, Amount	93	90	93	90	$ 94	$ 97	$ 88	$ 81
Other contracts
Servicing Assets at Fair Value [Line Items]
Servicing related fees and other ancillary income	6	8	13	13
Servicing Asset at Fair Value, Amount	$ 113	$ 117	$ 113	$ 117