INVESTMENTS - Debt Securities Held-to-Maturity (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
		Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Securities Held-to-maturity
Carrying value			$ 268,863	$ 216,963
Gross unrecognized gains			101	1,714
Gross unrecognized losses			25,316	2,639
Fair value			243,648	216,038
Fair value of securities transferred from AFS to HTM	[1],[2]		21,688	0	$ 0
Mortgage-backed securities - U.S. government-sponsored agency guaranteed
Debt Securities Held-to-maturity
Carrying value			90,063	63,885
Gross unrecognized gains			58	1,076
Gross unrecognized losses			10,033	925
Fair value			80,088	64,036
Fair value of securities transferred from AFS to HTM		$ 21,500
Securities transferred from AFS to HTM, unrealized loss		2,300
Mortgage-backed securities - Non-U.S. residential
Debt Securities Held-to-maturity
Carrying value			445	736
Gross unrecognized gains			0	3
Gross unrecognized losses			0	0
Fair value			445	739
Mortgage-backed securities - Commercial
Debt Securities Held-to-maturity
Carrying value			1,114	1,070
Gross unrecognized gains			5	4
Gross unrecognized losses			1	2
Fair value			1,118	1,072
Mortgage-backed securities
Debt Securities Held-to-maturity
Carrying value			91,622	65,691
Gross unrecognized gains			63	1,083
Gross unrecognized losses			10,034	927
Fair value			81,651	65,847
US Treasury securities
Debt Securities Held-to-maturity
Carrying value			134,961	111,819
Gross unrecognized gains			0	30
Gross unrecognized losses			13,722	1,632
Fair value			121,239	110,217
State and municipal
Debt Securities Held-to-maturity
Carrying value			9,237	8,923
Gross unrecognized gains			34	589
Gross unrecognized losses			764	12
Fair value			8,507	9,500
Fair value of securities transferred from AFS to HTM		165
Securities transferred from AFS to HTM, unrealized loss		$ 12
Foreign government
Debt Securities Held-to-maturity
Carrying value			2,075	1,651
Gross unrecognized gains			0	4
Gross unrecognized losses			93	36
Fair value			1,982	1,619
Asset-backed securities
Debt Securities Held-to-maturity
Carrying value			30,968	28,879
Gross unrecognized gains			4	8
Gross unrecognized losses			703	32
Fair value			$ 30,269	$ 28,855

[1] Operating and finance lease right-of-use assets and lease liabilities represent non-cash investing and financing activities, respectively, and are not included in the non-cash investing activities presented here. See Note 28 for more information and balances as of December 31, 2022 and 2021, respectively.

[2] See Note 2 for further information on significant disposals.