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Changes in liabilities classified as MRBs, ASU 2018-12 Transition (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 01, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Market Risk Benefit [Line Items]
Market risk benefit liabilities		$ 8,850		$ 8,850		$ 10,411	$ 16,062
Change in market risk benefits		1,064	$ 982	2,165	$ 2,625	(4,105)	(4,142)
Previously Reported
Market Risk Benefit [Line Items]
Market risk benefit liabilities						0	0
Change in market risk benefits						0	0
Variable Annuities
Market Risk Benefit [Line Items]
Market risk benefit liabilities	$ 18,421
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change		6,508	9,543	6,508	9,543	8,253	11,639	$ 14,969
Market Risk Benefit, Reinsurance Recoverable, after Allowance	169	35	76	35	76	71	118
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	18,252	$ 8,163	$ 11,045	$ 8,163	$ 11,045	$ 9,926	$ 15,608
Variable Annuities \| Previously Reported
Market Risk Benefit [Line Items]
Market risk benefit liabilities								$ 8,622
Variable Annuities \| Revision of Prior Period, Accounting Standards Update, Adjustment
Market Risk Benefit [Line Items]
Change in market risk benefits	6,347
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	$ 3,452