Variable Interest Entities (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Investment revenue	$ 8,373	$ 7,709	$ 5,338
Net investment income	7,571	7,100	4,834
Gain (Loss) on Investments	(12,706)	4,215	3,287
Provision for Loan, Lease, and Other Losses	(227)	53	(96)
Other gains (losses)	1,056	167	(49)
Trading securities
Variable Interest Entity [Line Items]
Investment revenue	194	260	192
Mortgage loans, net of allowances
Variable Interest Entity [Line Items]
Investment revenue	1,261	802	702
Investment funds
Variable Interest Entity [Line Items]
Investment revenue	550	1,908	710
Other investments
Variable Interest Entity [Line Items]
Investment revenue	270	271	226
Variable Interest Entities
Variable Interest Entity [Line Items]
Net investment income	111	77	51
Gain (Loss) on Investments	319	(27)	22
Provision for Loan, Lease, and Other Losses	0	(58)	27
Other gains (losses)	83	0	0
Variable Interest Entities \| Mortgage loans
Variable Interest Entity [Line Items]
Gain (Loss) on Investments	(250)	0	0
Variable Interest Entities \| Investment funds
Variable Interest Entity [Line Items]
Gain (Loss) on Investments	552	31	(5)
Variable Interest Entities \| Trading securities
Variable Interest Entity [Line Items]
Investment revenue	34	0	0
Gain (Loss) on Investments	(66)	0	0
Variable Interest Entities \| Mortgage loans, net of allowances
Variable Interest Entity [Line Items]
Investment revenue	88	73	40
Variable Interest Entities \| Investment funds
Variable Interest Entity [Line Items]
Investment Funds Gain (Loss)	9	4	11
Variable Interest Entities \| Other investments
Variable Interest Entity [Line Items]
Investment Funds Gain (Loss)	$ (20)	$ 0	$ 0

Investment Funds Gain (Loss)

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Amount of realized and unrealized gain (loss) on investment.

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Amount of gain (loss) included in earnings for investments classified as other.

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Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

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Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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