DISCONTINUED OPERATIONS, SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS - Income (Loss) Before Taxes (Details) - USD ($) $ in Millions						3 Months Ended
	Aug. 12, 2023	Mar. 01, 2023	Nov. 01, 2022	Aug. 01, 2022	Jun. 01, 2022	Mar. 31, 2024	Mar. 31, 2023
Australia
Results of Discontinued Operations
Income (loss) before taxes						$ 0	$ 0
Australia | Sold
Results of Discontinued Operations
Assets					$ 9,400
Loans					9,300
Allowance					140
Liabilities					7,300
Deposits					6,800
Pretax gain (loss) on sale of business					(766)
Gain (loss) on sale of business, after-tax					(643)
Loss on sale of business, foreign currency translation adjustments					620
Loss on sale of business, foreign currency translation adjustments, after-tax					$ 470
Philippines
Results of Discontinued Operations
Income (loss) before taxes						0	0
Philippines | Sold
Results of Discontinued Operations
Assets				$ 1,800
Loans				1,200
Allowance				80
Liabilities				1,300
Deposits				1,200
Pretax gain (loss) on sale of business				618
Gain (loss) on sale of business, after-tax				$ 290
Thailand
Results of Discontinued Operations
Income (loss) before taxes						0	0
Thailand | Sold
Results of Discontinued Operations
Assets			$ 2,700
Loans			2,400
Allowance			67
Liabilities			1,000
Deposits			800
Pretax gain (loss) on sale of business			209
Gain (loss) on sale of business, after-tax			$ 115
India
Results of Discontinued Operations
Income (loss) before taxes						0	2
India | Sold
Results of Discontinued Operations
Assets		$ 5,200
Loans		3,400
Allowance		32
Liabilities		5,200
Deposits		5,100
Pretax gain (loss) on sale of business		1,000					1,059
Gain (loss) on sale of business, after-tax		$ 717					727
Taiwan
Results of Discontinued Operations
Income (loss) before taxes						$ 0	$ 57
Taiwan | Sold
Results of Discontinued Operations
Assets	$ 11,600
Loans	7,200
Allowance	92
Liabilities	9,200
Deposits	9,000
Pretax gain (loss) on sale of business	403
Gain (loss) on sale of business, after-tax	$ 284