DERIVATIVES - Effect of Derivative Instruments on Net Income and Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax net gains (losses) recognized in OCI	$ (169)	$ 284
Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax net gains (losses) reclassified from AOCI into interest income	$ (113)	$ (202)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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