PREMISES, EQUIPMENT, AND SOFTWARE - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Capital Leases of Lessee [Abstract]
Depreciation expense	$ 130	$ 132	$ 115
Capitalized Software
Capitalized software, gross	2,700	2,500
Capitalized software, accumulated amortization	1,800	1,700
Amortization of software	$ 271	$ 268	$ 254

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- Definition

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

+ References

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Amount of expense for amortization of capitalized computer software costs.

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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