DISCONTINUED OPERATIONS, SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS - Assets and Liabilities Held-for-Sale and Income (Loss) Before Taxes (Details) - USD ($) $ in Millions					3 Months Ended		6 Months Ended
	Mar. 01, 2023	Nov. 01, 2022	Aug. 01, 2022	Jun. 01, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Australia
Results of Discontinued Operations
Income (loss) before taxes					$ 0	$ 28	$ 0	$ 193
Australia | Held for sale
Assets
Cash and deposits with banks					0		0
Loans					0		0
Goodwill					0		0
Other assets, advances to/from subsidiaries					0		0
Other assets					0		0
Total assets					0		0
Liabilities
Deposits					0		0
Long-term debt					0		0
Other liabilities					0		0
Total liabilities					0		0
Australia | Sold
Assets
Loans				$ 9,300
Total assets				9,400
Liabilities
Deposits				6,800
Total liabilities				7,300
Results of Discontinued Operations
Allowance				140
Pretax gain (loss) on sale of business				(760)
Gain (loss) on sale of business, after-tax				(640)
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	14	0	65
Philippines | Held for sale
Assets
Cash and deposits with banks					0		0
Loans					0		0
Goodwill					0		0
Other assets, advances to/from subsidiaries					0		0
Other assets					0		0
Total assets					0		0
Liabilities
Deposits					0		0
Long-term debt					0		0
Other liabilities					0		0
Total liabilities					0		0
Philippines | Sold
Assets
Loans			$ 1,200
Total assets			1,800
Liabilities
Deposits			1,200
Total liabilities			1,300
Results of Discontinued Operations
Allowance			80
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	90	0	78
Thailand | Held for sale
Assets
Cash and deposits with banks					0		0
Loans					0		0
Goodwill					0		0
Other assets, advances to/from subsidiaries					0		0
Other assets					0		0
Total assets					0		0
Liabilities
Deposits					0		0
Long-term debt					0		0
Other liabilities					0		0
Total liabilities					0		0
Thailand | Sold
Assets
Loans		$ 2,400
Total assets		2,700
Liabilities
Deposits		800
Total liabilities		1,000
Results of Discontinued Operations
Allowance		67
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	52	2	125
India | Held for sale
Assets
Cash and deposits with banks					0		0
Loans					0		0
Goodwill					0		0
Other assets, advances to/from subsidiaries					0		0
Other assets					0		0
Total assets					0		0
Liabilities
Deposits					0		0
Long-term debt					0		0
Other liabilities					0		0
Total liabilities					0		0
India | Sold
Assets
Loans	$ 3,400
Total assets	5,200
Liabilities
Deposits	5,100
Total liabilities	5,200
Results of Discontinued Operations
Allowance	32
Pretax gain (loss) on sale of business	1,100
Gain (loss) on sale of business, after-tax	$ 727
Taiwan
Results of Discontinued Operations
Income (loss) before taxes					35	$ 50	91	$ 96
Taiwan | Held for sale
Assets
Cash and deposits with banks					96		96
Loans					7,652		7,652
Goodwill					196		196
Other assets, advances to/from subsidiaries					4,441		4,441
Other assets					185		185
Total assets					12,570		12,570
Liabilities
Deposits					9,657		9,657
Long-term debt					0		0
Other liabilities					236		236
Total liabilities					9,893		9,893
Results of Discontinued Operations
Allowance					$ 31		$ 31