BORROWED FUNDS - Maturities of Long-term Borrowed Funds (Details) - USD ($) $ in Millions		Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
2026		$ 500
2027		2,030
2028		1,982
2029		6
2030		2,590
2028 and thereafter		4,116
Total	[1]	11,224	$ 12,401
Parent Company
Debt Instrument [Line Items]
2026		500
2027		0
2028		0
2029		0
2030		2,292
2028 and thereafter		3,976
Total		6,768
CBNA and Other Subsidiaries
Debt Instrument [Line Items]
2026		0
2027		2,030
2028		1,982
2029		6
2030		298
2028 and thereafter		140
Total		$ 4,456

[1] Includes amounts in consolidated VIEs. See Note 9 for additional information.