Loans and Related Allowance for Credit Losses (Consumer FDMs) (Details) - Total consumer lending - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Financing Receivable [Line Items]
Amortized cost basis, modified	$ 86	$ 95	$ 145	$ 148
% of Loan Class	0.08%	0.10%	0.14%	0.15%
Weighted average payment deferral term	8 months	6 months	9 months	6 months
Financing receivable, aging analysis	$ 225	$ 238	$ 225	$ 238
Current or Less Than 30 Days Past Due
Financing Receivable [Line Items]
Financing receivable, aging analysis	57	56	57	56
30-59 Days Past Due
Financing Receivable [Line Items]
Financing receivable, aging analysis	4	4	4	4
60-89 Days Past Due
Financing Receivable [Line Items]
Financing receivable, aging analysis	3	4	3	4
90 Days or More Past Due
Financing Receivable [Line Items]
Financing receivable, aging analysis	6	7	6	7
Nonperforming Loans
Financing Receivable [Line Items]
Financing receivable, aging analysis	155	167	155	167
Payment Delay
Financing Receivable [Line Items]
Amortized cost basis, modified	59	65	93	91
Repayment plan
Financing Receivable [Line Items]
Amortized cost basis, modified	15	18	29	35
Other
Financing Receivable [Line Items]
Amortized cost basis, modified	$ 12	$ 12	$ 23	$ 22

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- Definition

Amortized cost excluding accrued interest, of financing receivable 12 months after modification for debtor experiencing financial difficulty.

+ References

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-Topic 310
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- Definition

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

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- Definition

Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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