INVESTMENT SECURITIES - Schedule of Investment Securities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Current equity, amortized cost	$ 0	$ 0
Current equity, estimated fair value	12,814	7,609
Gross unrealized gains	1,169	781
Gross unrealized losses	(2,668)	(3,143)
Other equity	270	408
Non-current investment securities, amortized cost	39,761	38,388
Non-current investment securities, estimated fair value	38,262	36,027
GE Healthcare
Debt and Equity Securities, FV-NI [Line Items]
Current equity, amortized cost	0	0
Current equity, estimated fair value	7,410	0
AerCap
Debt and Equity Securities, FV-NI [Line Items]
Current equity, amortized cost	0	0
Current equity, estimated fair value	5,404	7,403
Baker Hughes
Debt and Equity Securities, FV-NI [Line Items]
Current equity, amortized cost	0	0
Current equity, estimated fair value	0	207
U.S. corporate
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	27,760	26,921
Gross unrealized gains	996	675
Gross unrealized losses	(1,781)	(2,164)
Estimated fair value	26,975	25,432
Non-U.S. corporate
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	2,585	2,548
Gross unrealized gains	26	18
Gross unrealized losses	(243)	(300)
Estimated fair value	2,369	2,266
State and municipal
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	2,881	2,898
Gross unrealized gains	106	66
Gross unrealized losses	(184)	(241)
Estimated fair value	2,803	2,722
Mortgage and asset-backed
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	4,623	4,442
Gross unrealized gains	39	21
Gross unrealized losses	(320)	(290)
Estimated fair value	4,341	4,173
Government and agencies
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	1,641	1,172
Gross unrealized gains	3	2
Gross unrealized losses	(139)	(147)
Estimated fair value	$ 1,504	$ 1,026

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as noncurrent.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as noncurrent.

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Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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