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Credit Quality and the Allowance for Loan and Lease Losses - Summary of Amortized Cost Basis of Consumer Loans That Were Modified for Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 737	$ 377	$ 1,100	$ 526
Loan modification program, percentage of modifications to total portfolio	0.41%	0.31%	0.59%	0.43%
Consumer
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 10	$ 10	$ 21	$ 20
Loan modification program, percentage of modifications to total portfolio	0.03%	0.03%	0.06%	0.07%
Consumer | Contractual Interest Rate Reduction
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 7	$ 5	$ 13	$ 11
Consumer | Payment Delay
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	1	2	2	3
Consumer | Other
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	2	3	6	6
Consumer | Home equity
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 3	$ 3	$ 8	$ 7
Loan modification program, percentage of modifications to total portfolio	0.04%	0.07%	0.12%	0.16%
Consumer | Home equity | Contractual Interest Rate Reduction
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 1	$ 0	$ 2	$ 1
Consumer | Home equity | Payment Delay
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	0	0	0	0
Consumer | Home equity | Other
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	2	3	6	6
Consumer | Credit card
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 6	$ 5	$ 11	$ 10
Loan modification program, percentage of modifications to total portfolio	0.36%	0.29%	0.65%	0.59%
Consumer | Credit card | Contractual Interest Rate Reduction
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 6	$ 5	$ 11	$ 10
Consumer | Credit card | Payment Delay
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	0	0	0	0
Consumer | Credit card | Other
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	0	0	0	0
Consumer | Solar energy installation loans
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 0	$ 1	$ 1	$ 1
Loan modification program, percentage of modifications to total portfolio	0.00%	0.02%	0.02%	0.02%
Consumer | Solar energy installation loans | Contractual Interest Rate Reduction
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 0	$ 0	$ 0	$ 0
Consumer | Solar energy installation loans | Payment Delay
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	0	1	1	1
Consumer | Solar energy installation loans | Other
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	0	0	0	0
Consumer | Other consumer loans
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 1	$ 1	$ 1	$ 2
Loan modification program, percentage of modifications to total portfolio	0.04%	0.04%	0.04%	0.08%
Consumer | Other consumer loans | Contractual Interest Rate Reduction
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 0	$ 0	$ 0	$ 0
Consumer | Other consumer loans | Payment Delay
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	1	1	1	2
Consumer | Other consumer loans | Other
Financing Receivable, Modifications
Financing receivable, excluding accrued interest, modified in period, amount	$ 0	$ 0	$ 0	$ 0

X

- Definition

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

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