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Disposal Group, Including Discontinued Operation, Equity Interests Issued And Issuable, Number Of Shares

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Equity Securities, FV-NI, Ownership Percentage

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Equity Securities, FV-NI, Shares

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Proceeds From Sale Of Debt Securities, Available For Sale And Equity Securities, FV-NI

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Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.

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Amount, before tax, of unrealized loss 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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Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Indicates line item in statement of financial position that includes accrued interest, after allowance for credit loss, on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of investment in equity security without readily determinable fair value.

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Amount of impairment loss on investment in equity security without readily determinable fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the reinsurer's funds held on its behalf by the ceding insurer, including funds held in trust, under reinsurance treaties or contracts with the assuming insurer as security for the payment of the obligations thereunder.

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The change in funds held under reinsurance agreements or treaty (contract between the reinsurer and the ceding entity stipulating the manner in which insurance written on various risks is to be shared).

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INVESTMENT SECURITIES - Narrative (Details) - USD ($) shares in Millions, $ in Millions		3 Months Ended	12 Months Ended
	Nov. 01, 2021	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest, current			$ 457	$ 415
Accrued interest, current, statement of financial position			All other current assets (Note 9)	All other current assets (Note 9)
Debt securities in unrealized loss position, total			$ 21,482	$ 3,446
Debt securities in unrealized loss position, 12 months or more			3,275	644
Gross unrealized losses, 12 months or more			(835)	(42)
Gross unrealized losses			(3,143)	(92)
Net unrealized gains (losses) recorded to earnings			(65)	1,656	$ (1,670)
Proceeds from investment securities sales and early redemptions by issuers			7,268	6,666	5,060
Debt securities, realized gain			34	69	173
Debt securities, realized losses and impairments			(42)	(11)	(68)
Equity securities without readily determinable fair values			731	441
Fair value adjustments, including impairment			(11)	46	(141)
Assets held by insurance regulators			800
Assets held in trust accounts, reinsurance agreements			29,700
Subsequent event \| Forecast
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase in funds held in trust accounts		$ 2,300
AerCap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net unrealized gains (losses) recorded to earnings			$ (865)	711	$ 0
Baker Hughes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, ownership percentage			1.00%
Equity securities, remaining interest (in shares)			7.0
Discontinued operations \| GECAS \| AerCap
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Consideration, stock transaction (in shares)	111.5
Equity securities, ownership percentage	46.00%
U.S. corporate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gross unrealized losses			$ (2,164)	$ (33)
CMBS
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gross unrealized losses			(182)
Asset-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gross unrealized losses			$ (106)