FAIR VALUE MEASUREMENTS - Schedule of Rollforward on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Six Months Ended June 30, 2026	$ 92	$ 54
Purchases, issuances, sales and settlements:
Issuances	3	7
Settlements	(7)	(1)
Transfers into Level 3	11	32
Balance at end of period	99	92
Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Six Months Ended June 30, 2026	85	53
Purchases, issuances, sales and settlements:
Issuances	0	0
Settlements	0	0
Transfers into Level 3	11	32
Balance at end of period	96	85
Interest Rate Lock Commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Six Months Ended June 30, 2026	7	1
Purchases, issuances, sales and settlements:
Issuances	3	7
Settlements	(7)	(1)
Transfers into Level 3	0	0
Balance at end of period	$ 3	$ 7

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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Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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