Separate Account Assets and Liabilities - Separate Account Liabilities (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2023		Dec. 31, 2022
Separate Account, Liability [Roll Forward]
Beginning balance	$ 73,962	[1]	$ 97,491
Premiums and deposits	1,153		1,744
Policy charges	(1,225)		(1,685)
Surrenders and other benefits	(4,798)		(6,757)
Investment return	3,186		(16,377)
Net transfer from (to) general account	41		133
Other charges	35		(587)
Ending balance	72,354		73,962	[1]
Cash surrender value	70,260		71,747
Variable Annuities
Separate Account, Liability [Roll Forward]
Beginning balance	63,223		82,862
Premiums and deposits	645		1,067
Policy charges	(1,002)		(1,396)
Surrenders and other benefits	(3,925)		(4,923)
Investment return	2,636		(14,450)
Net transfer from (to) general account	18		63
Other charges	0		0
Ending balance	61,595		63,223
Cash surrender value	60,001		61,461
Variable Universal Life
Separate Account, Liability [Roll Forward]
Beginning balance	7,653		9,376
Premiums and deposits	337		425
Policy charges	(218)		(278)
Surrenders and other benefits	(238)		(286)
Investment return	440		(1,654)
Net transfer from (to) general account	23		70
Other charges	0		0
Ending balance	7,997		7,653
Cash surrender value	7,497		7,200
Threadneedle Investment Liabilities
Separate Account, Liability [Roll Forward]
Beginning balance	3,086		5,253
Premiums and deposits	171		252
Policy charges	(5)		(11)
Surrenders and other benefits	(635)		(1,548)
Investment return	110		(273)
Net transfer from (to) general account	0		0
Other charges	35		(587)
Ending balance	2,762		3,086
Cash surrender value	$ 2,762		$ 3,086

[1] Certain prior period amounts have been restated. See Note 3 for more information.