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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 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Cash and due from banks |  | $ 1,236 | $ 1,031
Interest-bearing deposits with banks |  | 21,443 | 14,736
Total loans, net of allowance for loan losses |  | 48,697 | 51,343
Demand deposits (noninterest-bearing) |  | 45,800 | 39,420
Customer certificates of deposit |  | 1,973 | 2,133
Total deposits |  | 82,339 | 72,869
Medium- and long-term debt |  | 2,796 | 5,728
Carrying Amount |  |  |
Cash and due from banks |  | 1,236 | 1,031
Interest-bearing deposits with banks |  | 21,443 | 14,736
Other short-term investments |  | 16 | 10
Loans held-for-sale |  | 6 | 5
Total loans, net of allowance for loan losses | [1] | 48,697 | 51,343
Customers' liability on acceptances outstanding |  | 5 | 1
Restricted equity investments |  | 92 | 207
Nonmarketable equity securities | [2] | 5 | 5
Demand deposits (noninterest-bearing) |  | 45,800 | 39,420
Interest-bearing deposits |  | 34,566 | 31,316
Customer certificates of deposit |  | 1,973 | 2,133
Total deposits |  | 82,339 | 72,869
Acceptances outstanding |  | 5 | 1
Medium- and long-term debt |  | 2,796 | 5,728
Credit-related financial instruments |  | (59) | (74)
Estimated Fair Value |  |  |
Cash and due from banks |  | 1,236 | 1,031
Interest-bearing deposits with banks |  | 21,443 | 14,736
Other short-term investments |  | 16 | 10
Loans held-for-sale |  | 6 | 5
Total loans, net of allowance for loan losses | [1] | 49,127 | 50,601
Customers' liability on acceptances outstanding |  | 5 | 1
Restricted equity investments |  | 92 | 207
Nonmarketable equity securities | [2] | 10 | 9
Demand deposits (noninterest-bearing) |  | 45,800 | 39,420
Interest-bearing deposits |  | 34,566 | 31,316
Customer certificates of deposit |  | 1,968 | 2,133
Total deposits |  | 82,334 | 72,869
Acceptances outstanding |  | 5 | 1
Medium- and long-term debt |  | 2,854 | 5,790
Credit-related financial instruments |  | (59) | (74)
Level 1 | Estimated Fair Value |  |  |
Cash and due from banks |  | 1,236 | 1,031
Interest-bearing deposits with banks |  | 21,443 | 14,736
Other short-term investments |  | 16 | 10
Loans held-for-sale |  | 0 | 0
Total loans, net of allowance for loan losses | [1] | 0 | 0
Customers' liability on acceptances outstanding |  | 5 | 1
Restricted equity investments |  | 92 | 207
Demand deposits (noninterest-bearing) |  | 0 | 0
Interest-bearing deposits |  | 0 | 0
Customer certificates of deposit |  | 0 | 0
Total deposits |  | 0 | 0
Acceptances outstanding |  | 5 | 1
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 |  | 6 | 5
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) |  | 45,800 | 39,420
Interest-bearing deposits |  | 34,566 | 31,316
Customer certificates of deposit |  | 1,968 | 2,133
Total deposits |  | 82,334 | 72,869
Acceptances outstanding |  | 0 | 0
Medium- and long-term debt |  | 2,854 | 5,790
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] | 49,127 | 50,601
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 |  | (59) | (74)
Nonrecurring |  |  |
Total loans, net of allowance for loan losses |  | $ 150 | $ 150
[1] | Included $150 million of loans recorded at fair value on a nonrecurring basis at both December 31, 2021 and 2020.
[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.

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