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LOANS AND LEASES - Schedule of Loans to Related Parties (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)
Financing Receivable, Excluding Accrued Interest [Roll Forward]
Balance at Beginning of Year	$ 33,939	[1]
Balance at End of Year	34,777	[1]
Related Party
Financing Receivable, Excluding Accrued Interest [Roll Forward]
Balance at Beginning of Year	6
New loans	4
Repayments	(2)
Other	(1)
Balance at End of Year	$ 7
[1] Amount represents loans for which we have elected the fair value option. See Note 25.

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- Definition

Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Additions

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- Definition

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- Definition

Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Repayments

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

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