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Allowance For Credit Losses (Analysis Of The Allowance For Credit Losses By Portfolio Segment) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Allowance for Loan and Lease Losses [Roll Forward] |  |
Allowance for loan losses, beginning of period | $ 1,576 | $ 1,464
Cumulative change in accounting guidance |  | (38)
LoanandLeaseReceivableAllowanceBeginningBalanceadjustedforchangeinaccountingguidance |  | 1,426
Provision (credit) for loan losses | 162 | 129
Loan Losses: |  |
Charge-offs | (141) | (105)
Recoveries | 20 | 22
Net loan losses | (121) | (83)
Total allowance for loan losses | 1,617 | 1,472
Reserve For Unfunded Credit Commitments [Roll Forward] |  |
Reserve for unfunded credit commitments, beginning of year | 124 | 118
Provision (credit) for unfunded credit losses | (10) | 6
Reserve for unfunded credit commitments, end of year | 114 | 124
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 1,731 | 1,596
Commercial Portfolio Segment [Member] |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Allowance for loan losses, beginning of period | 722 | 665
Cumulative change in accounting guidance |  | (3)
LoanandLeaseReceivableAllowanceBeginningBalanceadjustedforchangeinaccountingguidance |  | 662
Provision (credit) for loan losses | 88 | 70
Loan Losses: |  |
Charge-offs | (62) | (49)
Recoveries | 8 | 10
Net loan losses | (54) | (39)
Total allowance for loan losses | 756 | 693
Reserve For Unfunded Credit Commitments [Roll Forward] |  |
Reserve for unfunded credit commitments, beginning of year | 92 | 72
Provision (credit) for unfunded credit losses | (5) | 5
Reserve for unfunded credit commitments, end of year | 87 | 77
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 843 | 770
Total Investor Real Estate [Member] |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Allowance for loan losses, beginning of period | 192 | 121
Cumulative change in accounting guidance |  | (3)
LoanandLeaseReceivableAllowanceBeginningBalanceadjustedforchangeinaccountingguidance |  | 118
Provision (credit) for loan losses | 23 | 8
Loan Losses: |  |
Charge-offs | (5) | 0
Recoveries | 1 | 0
Net loan losses | (4) | 0
Total allowance for loan losses | 211 | 126
Reserve For Unfunded Credit Commitments [Roll Forward] |  |
Reserve for unfunded credit commitments, beginning of year | 13 | 21
Provision (credit) for unfunded credit losses | (3) | 6
Reserve for unfunded credit commitments, end of year | 10 | 27
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 221 | 153
Consumer Portfolio Segment [Member] |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |
Allowance for loan losses, beginning of period | 662 | 678
Cumulative change in accounting guidance |  | (32)
LoanandLeaseReceivableAllowanceBeginningBalanceadjustedforchangeinaccountingguidance |  | 646
Provision (credit) for loan losses | 51 | 51
Loan Losses: |  |
Charge-offs | (74) | (56)
Recoveries | 11 | 12
Net loan losses | (63) | (44)
Total allowance for loan losses | 650 | 653
Reserve For Unfunded Credit Commitments [Roll Forward] |  |
Reserve for unfunded credit commitments, beginning of year | 19 | 25
Provision (credit) for unfunded credit losses | (2) | (5)
Reserve for unfunded credit commitments, end of year | 17 | 20
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 667 | $ 673

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481696/310-30-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (g) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4 + Details
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