INVESTMENT SECURITIES - Schedule of Investment Securities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Debt and Equity Securities, FV-NI [Line Items]
Equity, amortized cost	$ 0	$ 0
Equity, estimated fair value	6,297	12,297
Gross unrealized gains	615	6,639
Gross unrealized losses	(3,602)	(92)
Other equity	311	443
Non-current investment securities, amortized cost	36,611	35,662
Non-current investment securities, estimated fair value	33,624	42,209
AerCap
Debt and Equity Securities, FV-NI [Line Items]
Equity, amortized cost	0	0
Equity, estimated fair value	5,602	8,287
Baker Hughes
Debt and Equity Securities, FV-NI [Line Items]
Equity, amortized cost	0	0
Equity, estimated fair value	695	4,010
U.S. corporate
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	26,038	25,182
Gross unrealized gains	483	5,502
Gross unrealized losses	(2,571)	(33)
Estimated fair value	23,950	30,652
Non-U.S. corporate
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	2,455	2,361
Gross unrealized gains	12	343
Gross unrealized losses	(366)	(4)
Estimated fair value	2,101	2,701
State and municipal
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	2,741	2,639
Gross unrealized gains	67	573
Gross unrealized losses	(236)	(6)
Estimated fair value	2,572	3,205
Mortgage and asset-backed
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	3,978	3,950
Gross unrealized gains	20	117
Gross unrealized losses	(288)	(47)
Estimated fair value	3,710	4,019
Government and agencies
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, excluding accrued interest	1,087	1,086
Gross unrealized gains	34	104
Gross unrealized losses	(142)	(2)
Estimated fair value	$ 979	$ 1,188

Debt And Equity Securities, Cost, Noncurrent

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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 excluding accrued interest, of 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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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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