BORROWINGS - Schedule of Short-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Short-term Debt [Line Items]
Short-term borrowings	$ 1,875	$ 1,261
Securities sold under agreements to repurchase
Short-term Debt [Line Items]
Short-term borrowings	12	22
FHLB advances
Short-term Debt [Line Items]
Short-term borrowings	1,500	1,000
Other borrowings
Short-term Debt [Line Items]
Short-term borrowings	$ 363	$ 239

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Balance Type:	credit
Period Type:	instant