LOANS - Performance of Modified Corporate Loans (Details) - Corporate - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Loans receivable
Total modified loans balance	$ 369	$ 356
Loans in default	7	0
Current
Loans receivable
Total modified loans balance	350	356
30–89 days past due
Loans receivable
Total modified loans balance	12	0
90+ days past due
Loans receivable
Total modified loans balance	7	0
Commercial and industrial
Loans receivable
Total modified loans balance	286	251
Commercial and industrial \| Current
Loans receivable
Total modified loans balance	278	251
Commercial and industrial \| 30–89 days past due
Loans receivable
Total modified loans balance	1	0
Commercial and industrial \| 90+ days past due
Loans receivable
Total modified loans balance	7	0
Financial institutions
Loans receivable
Total modified loans balance	0	0
Financial institutions \| Current
Loans receivable
Total modified loans balance	0	0
Financial institutions \| 30–89 days past due
Loans receivable
Total modified loans balance	0	0
Financial institutions \| 90+ days past due
Loans receivable
Total modified loans balance	0	0
Mortgage and real estate
Loans receivable
Total modified loans balance	77	105
Mortgage and real estate \| Current
Loans receivable
Total modified loans balance	66	105
Mortgage and real estate \| 30–89 days past due
Loans receivable
Total modified loans balance	11	0
Mortgage and real estate \| 90+ days past due
Loans receivable
Total modified loans balance	0	0
Other
Loans receivable
Total modified loans balance	6	0
Other \| Current
Loans receivable
Total modified loans balance	6	0
Other \| 30–89 days past due
Loans receivable
Total modified loans balance	0	0
Other \| 90+ days past due
Loans receivable
Total modified loans balance	$ 0	$ 0