OPERATING SEGMENTS - Reconciliation (Details) - USD ($) $ in Millions		3 Months Ended
	Mar. 01, 2023	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Income (loss) from continuing operations		$ 3,408	$ 4,652
Total revenues, net of interest expense		7,597	8,099
Total operating expenses		14,195	13,289
Provision for income taxes		1,136	1,531
Held for sale | Mexico and Asia Exit Markets
Segment Reporting Information [Line Items]
Operating expenses, before tax		110
Operating expenses, after tax		77
Sold | India
Segment Reporting Information [Line Items]
Pretax gain (loss) on sale of business	$ 1,000		1,059
Gain (loss) on sale of business, after-tax	$ 717		727
Operating Segments
Segment Reporting Information [Line Items]
Income (loss) from continuing operations		3,502	4,004
Reconciling Items
Segment Reporting Information [Line Items]
Income (loss) from continuing operations		(94)	648
Total revenues, net of interest expense		(12)	1,018
Total operating expenses		110	73
Provision (release) for credit losses		11	(8)
Provision for income taxes		$ (39)	$ 305