LOANS AND LEASES - Net Investments in Lease Financing Receivables (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value of residual values guaranteed	$ 419	$ 517
Future lease rental payments due on sales-type and direct financing leases	5,400
Future lease rental payments due on sales-type and direct financing leases, year one	1,200
Future lease rental payments due on sales-type and direct financing leases, year two	1,100
Future lease rental payments due on sales-type and direct financing leases, year three	1,000
Future lease rental payments due on sales-type and direct financing leases, year four	901
Future lease rental payments due on sales-type and direct financing leases, year five	623
Future lease rental payments due on sales-type and direct financing leases, after year five	636
Direct financing leases, interest income	365	336	$ 287
Commercial portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lease payments receivable	5,379	5,189
Estimated residual value of leased assets	1,011	884
Gross investment in lease financing receivables	6,390	6,073
Deferred origination costs	58	56
Deferred fees, unearned income and other	(721)	(675)
Total lease financing receivables	$ 5,727	$ 5,454

Direct Financing Lease, Gross Investment In Direct Financing Leases

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Remaining unamortized costs as of the balance sheet date that were essential to acquiring the lease, and that would not otherwise have been incurred without the lease agreement, including evaluating the lessee's credit condition, guarantees, and collateral and costs incurred negotiating, processing, and closing the lease agreement.

+ References

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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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- Definition

Amount of deferred selling profit from direct financing lease.

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Amount of interest income from net investment in direct financing lease.

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Present value of lease payments not yet received by lessor and amount expected to be derived from underlying asset, following end of lease term, guaranteed by lessee or other third party unrelated to lessor, from direct financing lease.

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Amount, before allowance for credit loss, of net investment in direct financing lease.

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Present value expected to be derived from underlying asset, following end of lease term, not guaranteed by lessee or other third party unrelated to lessor.

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Amount of residual asset covered by residual value guarantee. Excludes guarantee considered to be lease payments for lessor.

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Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases.

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Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of undiscounted cash flows to be received by lessor for sales-type and direct financing leases in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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