SHAREHOLDERS' EQUITY (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance			$ 41,612,000,000
Ending balance	$ 32,753,000,000	$ 38,961,000,000	$ 32,753,000,000	$ 38,961,000,000
Dividends declared per common share (in dollars per share)	$ 0.08	$ 0.08	$ 0.24	$ 0.24
Adjustments to investment securities before reclassifications	$ 0	$ 2,456,000,000	$ 2,681,000,000	$ 3,350,000,000
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(1,852,000,000)	(7,820,000,000)	1,582,000,000	(9,749,000,000)
Ending balance	(4,405,000,000)	(5,078,000,000)	(4,405,000,000)	(5,078,000,000)
Currency translation adjustments including noncontrolling interests
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(5,510,000,000)	(4,146,000,000)	(4,562,000,000)	(4,386,000,000)
AOCI before reclass, net of taxes	(912,000,000)	(158,000,000)	(1,858,000,000)	82,000,000
Reclass from AOCI, net of taxes	0	0	0	0
Other comprehensive income (loss)	(912,000,000)	(158,000,000)	(1,858,000,000)	81,000,000
AOCI before reclass, taxes	69,000,000	5,000,000	204,000,000	(51,000,000)
Reclass from AOCI, taxes	0	0	0	0
Currency translation adjustments attributable to noncontrolling interests
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Other comprehensive income (loss)	(4,000,000)	1,000,000	(2,000,000)	1,000,000
Currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Other comprehensive income (loss)	(909,000,000)	(160,000,000)	(1,857,000,000)	80,000,000
Ending balance	(6,419,000,000)	(4,305,000,000)	(6,419,000,000)	(4,305,000,000)
Benefit plans including noncontrolling interests
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	4,173,000,000	(3,777,000,000)	3,646,000,000	(5,395,000,000)
AOCI before reclass, net of taxes	66,000,000	91,000,000	217,000,000	264,000,000
Reclass from AOCI, net of taxes	193,000,000	662,000,000	571,000,000	2,108,000,000
Other comprehensive income (loss)	259,000,000	753,000,000	788,000,000	2,372,000,000
AOCI before reclass, taxes	24,000,000	16,000,000	81,000,000	(5,000,000)
Reclass from AOCI, taxes	53,000,000	192,000,000	159,000,000	592,000,000
Benefit plans attributable to noncontrolling interests
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Other comprehensive income (loss)	0	2,000,000	2,000,000	4,000,000
Benefit plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Other comprehensive income (loss)	259,000,000	751,000,000	786,000,000	2,369,000,000
Ending balance	4,432,000,000	(3,026,000,000)	4,432,000,000	(3,026,000,000)
Investment securities and cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(514,000,000)	103,000,000	2,498,000,000	32,000,000
AOCI before reclass, net of taxes	(1,894,000,000)	2,152,000,000	(4,920,000,000)	2,201,000,000
Reclass from AOCI, net of taxes	(10,000,000)	(1,000,000)	4,000,000	21,000,000
Other comprehensive income (loss)	(1,904,000,000)	2,151,000,000	(4,916,000,000)	2,222,000,000
Ending balance	(2,418,000,000)	2,254,000,000	(2,418,000,000)	2,254,000,000
AOCI before reclass, taxes	(494,000,000)	576,000,000	(1,302,000,000)	566,000,000
Reclass from AOCI, taxes	$ 3,000,000	$ 3,000,000	$ 10,000,000	$ 13,000,000