Fair Value Measurements (Estimated Fair Values Of Financial Instruments Not Recorded At Fair Value In Their Entirety On A Recurring Basis) (Details) - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Cash and due from banks		$ 1,735	$ 1,236
Interest-bearing deposits with banks		4,235	21,443
Total loans, net of allowance for loan losses		51,136	48,697
Demand deposits (noninterest-bearing)		42,296	45,800
Customer certificates of deposit		1,661	1,973
Total deposits		73,016	82,339
Medium- and long-term debt		3,016	2,796
Carrying Amount
Cash and due from banks		1,735	1,236
Interest-bearing deposits with banks		4,235	21,443
Other short-term investments		16	16
Loans held-for-sale		3	6
Total loans, net of allowance for loan losses	[1]	51,136	48,697
Customers' liability on acceptances outstanding		5	5
Restricted equity investments		113	92
Nonmarketable equity securities	[2]	5	5
Demand deposits (noninterest-bearing)		42,296	45,800
Interest-bearing deposits		29,059	34,566
Customer certificates of deposit		1,661	1,973
Total deposits		73,016	82,339
Acceptances outstanding		5	5
Medium- and long-term debt		3,016	2,796
Credit-related financial instruments		(76)	(59)
Estimated Fair Value
Cash and due from banks		1,735	1,236
Interest-bearing deposits with banks		4,235	21,443
Other short-term investments		16	16
Loans held-for-sale		3	6
Total loans, net of allowance for loan losses	[1]	48,521	49,127
Customers' liability on acceptances outstanding		5	5
Restricted equity investments		113	92
Nonmarketable equity securities	[2]	12	10
Demand deposits (noninterest-bearing)		42,296	45,800
Interest-bearing deposits		29,059	34,566
Customer certificates of deposit		1,621	1,968
Total deposits		72,976	82,334
Acceptances outstanding		5	5
Medium- and long-term debt		3,035	2,854
Credit-related financial instruments		(76)	(59)
Level 1 | Estimated Fair Value
Cash and due from banks		1,735	1,236
Interest-bearing deposits with banks		4,235	21,443
Other short-term investments		16	16
Loans held-for-sale		0	0
Total loans, net of allowance for loan losses	[1]	0	0
Customers' liability on acceptances outstanding		5	5
Restricted equity investments		113	92
Demand deposits (noninterest-bearing)		0	0
Interest-bearing deposits		0	0
Customer certificates of deposit		0	0
Total deposits		0	0
Acceptances outstanding		5	5
Medium- and long-term debt		0	0
Credit-related financial instruments		0	0
Level 2 | Estimated Fair Value
Cash and due from banks		0	0
Interest-bearing deposits with banks		0	0
Other short-term investments		0	0
Loans held-for-sale		3	6
Total loans, net of allowance for loan losses	[1]	0	0
Customers' liability on acceptances outstanding		0	0
Restricted equity investments		0	0
Demand deposits (noninterest-bearing)		42,296	45,800
Interest-bearing deposits		29,059	34,566
Customer certificates of deposit		1,621	1,968
Total deposits		72,976	82,334
Acceptances outstanding		0	0
Medium- and long-term debt		3,035	2,854
Credit-related financial instruments		0	0
Level 3 | Estimated Fair Value
Cash and due from banks		0	0
Interest-bearing deposits with banks		0	0
Other short-term investments		0	0
Loans held-for-sale		0	0
Total loans, net of allowance for loan losses	[1]	48,521	49,127
Customers' liability on acceptances outstanding		0	0
Restricted equity investments		0	0
Demand deposits (noninterest-bearing)		0	0
Interest-bearing deposits		0	0
Customer certificates of deposit		0	0
Total deposits		0	0
Acceptances outstanding		0	0
Medium- and long-term debt		0	0
Credit-related financial instruments		(76)	(59)
Nonrecurring
Total loans, net of allowance for loan losses		$ 69	$ 150

[1] Included $69 million and $150 million of loans recorded at fair value on a nonrecurring basis at September 30, 2022 and December 31, 2021, respectively.

[2] Certain investments that are measured at fair value using the net asset value have not been classified in the fair value hierarchy. The fair value amounts presented in the table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the Consolidated Balance Sheets.