Reserves for Future Policy Benefits and Contract Owner Account Balances (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) yr	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) yr	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) yr	Dec. 31, 2021 USD ($)
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Net liability for future policy benefits	$ 9,371		$ 9,371		$ 9,719
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			42,455
Interest credited	328	$ 240	813	$ 716
Policyholder Account Balance, Ending Balance	40,135		40,135		42,455
Policyholder Account Balance	40,135		40,135		42,455
Up to 1.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			13,398
Policyholder Account Balance, Ending Balance	12,726		12,726		13,398
Policyholder Account Balance	12,726		12,726		13,398
1.01% - 2.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			804
Policyholder Account Balance, Ending Balance	751		751		804
Policyholder Account Balance	751		751		804
2.01% - 3.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			12,892
Policyholder Account Balance, Ending Balance	11,860		11,860		12,892
Policyholder Account Balance	11,860		11,860		12,892
3.01% - 4.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			9,601
Policyholder Account Balance, Ending Balance	9,355		9,355		9,601
Policyholder Account Balance	9,355		9,355		9,601
4.01% and Above
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			1,730
Policyholder Account Balance, Ending Balance	1,668		1,668		1,730
Policyholder Account Balance	1,668		1,668		1,730
Renewable beyond 12 months (MYGA)
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			405
Policyholder Account Balance, Ending Balance	430		430		405
Policyholder Account Balance	430		430		405
Total discretionary rate setting products
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			38,830
Policyholder Account Balance, Ending Balance	36,790		36,790		38,830
Policyholder Account Balance	36,790		36,790		38,830
At GMIR
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			30,725
Policyholder Account Balance, Ending Balance	23,519		23,519		30,725
Policyholder Account Balance	23,519		23,519		30,725
At GMIR | Up to 1.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			5,848
Policyholder Account Balance, Ending Balance	141		141		5,848
Policyholder Account Balance	141		141		5,848
At GMIR | 1.01% - 2.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			707
Policyholder Account Balance, Ending Balance	553		553		707
Policyholder Account Balance	553		553		707
At GMIR | 2.01% - 3.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			12,677
Policyholder Account Balance, Ending Balance	11,617		11,617		12,677
Policyholder Account Balance	11,617		11,617		12,677
At GMIR | 3.01% - 4.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			9,448
Policyholder Account Balance, Ending Balance	9,197		9,197		9,448
Policyholder Account Balance	9,197		9,197		9,448
At GMIR | 4.01% and Above
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			1,643
Policyholder Account Balance, Ending Balance	1,584		1,584		1,643
Policyholder Account Balance	1,584		1,584		1,643
At GMIR | Renewable beyond 12 months (MYGA)
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			402
Policyholder Account Balance, Ending Balance	427		427		402
Policyholder Account Balance	427		427		402
Up to .50% Above GMIR
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			3,314
Policyholder Account Balance, Ending Balance	6,710		6,710		3,314
Policyholder Account Balance	6,710		6,710		3,314
Up to .50% Above GMIR | Up to 1.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			2,967
Policyholder Account Balance, Ending Balance	6,261		6,261		2,967
Policyholder Account Balance	6,261		6,261		2,967
Up to .50% Above GMIR | 1.01% - 2.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			51
Policyholder Account Balance, Ending Balance	135		135		51
Policyholder Account Balance	135		135		51
Up to .50% Above GMIR | 2.01% - 3.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			56
Policyholder Account Balance, Ending Balance	77		77		56
Policyholder Account Balance	77		77		56
Up to .50% Above GMIR | 3.01% - 4.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			153
Policyholder Account Balance, Ending Balance	153		153		153
Policyholder Account Balance	153		153		153
Up to .50% Above GMIR | 4.01% and Above
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			87
Policyholder Account Balance, Ending Balance	84		84		87
Policyholder Account Balance	84		84		87
Up to .50% Above GMIR | Renewable beyond 12 months (MYGA)
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
0.51% - 1.00% Above GMIR
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			1,989
Policyholder Account Balance, Ending Balance	2,800		2,800		1,989
Policyholder Account Balance	2,800		2,800		1,989
0.51% - 1.00% Above GMIR | Up to 1.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			1,907
Policyholder Account Balance, Ending Balance	2,696		2,696		1,907
Policyholder Account Balance	2,696		2,696		1,907
0.51% - 1.00% Above GMIR | 1.01% - 2.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			35
Policyholder Account Balance, Ending Balance	51		51		35
Policyholder Account Balance	51		51		35
0.51% - 1.00% Above GMIR | 2.01% - 3.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			47
Policyholder Account Balance, Ending Balance	53		53		47
Policyholder Account Balance	53		53		47
0.51% - 1.00% Above GMIR | 3.01% - 4.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
0.51% - 1.00% Above GMIR | 4.01% and Above
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
0.51% - 1.00% Above GMIR | Renewable beyond 12 months (MYGA)
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
1.01% - 1.50% Above GMIR
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			1,223
Policyholder Account Balance, Ending Balance	2,129		2,129		1,223
Policyholder Account Balance	2,129		2,129		1,223
1.01% - 1.50% Above GMIR | Up to 1.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			1,112
Policyholder Account Balance, Ending Balance	2,010		2,010		1,112
Policyholder Account Balance	2,010		2,010		1,112
1.01% - 1.50% Above GMIR | 1.01% - 2.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			2
Policyholder Account Balance, Ending Balance	4		4		2
Policyholder Account Balance	4		4		2
1.01% - 1.50% Above GMIR | 2.01% - 3.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			109
Policyholder Account Balance, Ending Balance	110		110		109
Policyholder Account Balance	110		110		109
1.01% - 1.50% Above GMIR | 3.01% - 4.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	5		5		0
Policyholder Account Balance	5		5		0
1.01% - 1.50% Above GMIR | 4.01% and Above
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
1.01% - 1.50% Above GMIR | Renewable beyond 12 months (MYGA)
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
1.51% - 2.00% Above GMIR
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			1,467
Policyholder Account Balance, Ending Balance	838		838		1,467
Policyholder Account Balance	838		838		1,467
1.51% - 2.00% Above GMIR | Up to 1.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			1,462
Policyholder Account Balance, Ending Balance	833		833		1,462
Policyholder Account Balance	833		833		1,462
1.51% - 2.00% Above GMIR | 1.01% - 2.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			2
Policyholder Account Balance, Ending Balance	2		2		2
Policyholder Account Balance	2		2		2
1.51% - 2.00% Above GMIR | 2.01% - 3.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
1.51% - 2.00% Above GMIR | 3.01% - 4.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
1.51% - 2.00% Above GMIR | 4.01% and Above
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
1.51% - 2.00% Above GMIR | Renewable beyond 12 months (MYGA)
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			3
Policyholder Account Balance, Ending Balance	3		3		3
Policyholder Account Balance	3		3		3
More than 2.00% Above GMIR
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			112
Policyholder Account Balance, Ending Balance	794		794		112
Policyholder Account Balance	794		794		112
More than 2.00% Above GMIR | Up to 1.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			102
Policyholder Account Balance, Ending Balance	785		785		102
Policyholder Account Balance	785		785		102
More than 2.00% Above GMIR | 1.01% - 2.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			7
Policyholder Account Balance, Ending Balance	6		6		7
Policyholder Account Balance	6		6		7
More than 2.00% Above GMIR | 2.01% - 3.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			3
Policyholder Account Balance, Ending Balance	3		3		3
Policyholder Account Balance	3		3		3
More than 2.00% Above GMIR | 3.01% - 4.00%
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
More than 2.00% Above GMIR | 4.01% and Above
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
More than 2.00% Above GMIR | Renewable beyond 12 months (MYGA)
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			0
Policyholder Account Balance, Ending Balance	0		0		0
Policyholder Account Balance	0		0		0
Employee Benefits, Group
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Beginning Balance			77	93	93
Beginning balance at original discount rate			84	85	85
Effect of change in cash flow assumptions					(6)	$ (7)
Effect of actual variances from expected experience					18	23
Adjusted balance at January 1					96	101
Interest accrual			2		2
Net premiums collected			(16)		(19)
Ending balance at original discount rate	82		82		84
Effects of changes in discount rate assumptions	(8)		(8)		(7)
Ending Balance	74		74		77
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Beginning Balance			881	1,048	1,048
Beginning balance at original discount rate			913	952	952
Effect of change in cash flow assumptions					(15)	(43)
Effect of actual variances from expected experience					1	(27)
Adjusted balance at January 1					899	882
Issuances			103		139
Interest accrual			18		25
Benefit payments			(98)		(133)
Ending balance at original discount rate	922		922		913
Effects of changes in discount rate assumptions	(57)		(57)		(32)
Ending Balance	865		865		881
Net liability for future policy benefits	791		791		804
Less: Reinsurance recoverable	301		301		283
Net additional liability, after reinsurance recoverable	$ 490		$ 490		$ 521
Weighted average duration (in years) | yr	7		7		7
Interest accretion rate	4.00%		4.00%		4.10%
Current discount rate	5.80%		5.80%		5.20%
undiscounted expected gross premiums and future benefit payments [Line Items]
Expected future benefit payments, Undiscounted	$ 1,149		$ 1,149		$ 1,141
Expected future gross premiums, Undiscounted	312		312		286
Expected future benefit payments, Discounted	922		922		913	952
Expected future gross premiums, Discounted	247		247		231
Employee Benefits, Voluntary
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Beginning Balance			97	105	105
Beginning balance at original discount rate			100	92	92
Effect of change in cash flow assumptions					6	0
Effect of actual variances from expected experience					6	20
Adjusted balance at January 1					112	112
Interest accrual			3		4
Net premiums collected			(12)		(16)
Ending balance at original discount rate	103		103		100
Effects of changes in discount rate assumptions	(7)		(7)		(3)
Ending Balance	96		96		97
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Beginning Balance			285	359	359
Beginning balance at original discount rate			294	290	290
Effect of change in cash flow assumptions					13	(2)
Effect of actual variances from expected experience					6	11
Adjusted balance at January 1					313	299
Issuances			0		0
Interest accrual			11		14
Benefit payments			(16)		(19)
Ending balance at original discount rate	308		308		294
Effects of changes in discount rate assumptions	(29)		(29)		(9)
Ending Balance	279		279		285
Net liability for future policy benefits	183		183		188
Less: Reinsurance recoverable	0		0		0
Net additional liability, after reinsurance recoverable	$ 183		$ 183		$ 188
Weighted average duration (in years) | yr	14,000,000		14,000,000		14,000,000
Interest accretion rate	5.30%		5.30%		5.30%
Current discount rate	6.00%		6.00%		5.40%
undiscounted expected gross premiums and future benefit payments [Line Items]
Expected future benefit payments, Undiscounted	$ 671		$ 671		$ 588
Expected future gross premiums, Undiscounted	343		343		307
Expected future benefit payments, Discounted	308		308		294	290
Expected future gross premiums, Discounted	214		214		205
business exited
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Beginning Balance			4,244	5,634	5,634
Beginning balance at original discount rate			4,128	4,226	4,226
Effect of change in cash flow assumptions					(921)	(69)
Effect of actual variances from expected experience					(61)	86
Adjusted balance at January 1					3,146	4,243
Interest accrual			155		230
Net premiums collected			(243)		(345)
Ending balance at original discount rate	3,058		3,058		4,128
Effects of changes in discount rate assumptions	(47)		(47)		116
Ending Balance	3,011		3,011		4,244
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Beginning Balance			8,639	11,444	11,444
Beginning balance at original discount rate			8,644	9,079	9,079
Effect of change in cash flow assumptions					(805)	(77)
Effect of actual variances from expected experience					(80)	(52)
Adjusted balance at January 1					7,759	8,950
Issuances			13		13
Interest accrual			317		458
Benefit payments			(568)		(777)
Ending balance at original discount rate	7,521		7,521		8,644
Effects of changes in discount rate assumptions	(330)		(330)		(5)
Ending Balance	7,191		7,191		8,639
Net liability for future policy benefits	4,179		4,179		4,395
Less: Reinsurance recoverable	4,127		4,127		4,411
Net additional liability, after reinsurance recoverable	$ 52		$ 52		$ (16)
Weighted average duration (in years) | yr	8,000,000		8,000,000		8,000,000
Interest accretion rate	4.90%		4.90%		5.00%
Current discount rate	5.60%		5.60%		5.70%
undiscounted expected gross premiums and future benefit payments [Line Items]
Expected future benefit payments, Discounted	$ 7,521		$ 7,521		$ 8,644	9,079
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			5,146	5,532	5,532
Deposits			217		310
Fee income			(281)		(384)
Surrenders and withdrawals			(310)		(281)
Benefit payments			(111)		(144)
Net transfers from (to) separate accounts			(1)		0
Interest credited			108		150
Other			0		(37)
Policyholder Account Balance, Ending Balance	$ 4,768		$ 4,768		$ 5,146
Weighted-average crediting rate	2.50%		2.50%		2.50%
Net amount at risk	$ 801		$ 801		$ 900
Cash surrender value	1,581		1,581		1,824
Policyholder Account Balance	4,768		4,768		5,146	5,532
business exited, additional liability
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Beginning Balance			2,107	1,715	1,715
Effect of change in cash flow assumptions					(44)	540
Effect of actual variances from expected experience					(20)	15
Adjusted balance at January 1					2,043	2,270
Interest accrual			64		80
Benefit payments			(301)		(427)
Assessments			195		184
Ending Balance					2,107
Net liability for future policy benefits	2,001		2,001		2,107
Less: Reinsurance recoverable	1,949		1,949		2,054
Net additional liability, after reinsurance recoverable	$ 52		$ 52		$ 53
Current discount rate	4.20%		4.20%		4.30%
Other Segments
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Net liability for future policy benefits	$ 2,217		$ 2,217		$ 2,225
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			3,687
Policyholder Account Balance, Ending Balance	3,436		3,436		3,687
Policyholder Account Balance	3,436		3,436		3,687
Wealth Solutions
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance, Beginning Balance			33,622	$ 33,044	33,044
Deposits			1,726		2,962
Fee income			(6)		(8)
Surrenders and withdrawals			(3,891)		(4,280)
Benefit payments			(133)		(157)
Net transfers from (to) separate accounts			(59)		1,174
Interest credited			664		874
Other			8		13
Policyholder Account Balance, Ending Balance	$ 31,931		$ 31,931		$ 33,622
Weighted-average crediting rate	2.70%		2.70%		2.60%
Net amount at risk	$ 148		$ 148		$ 199
Cash surrender value	31,455		31,455		33,125
Policyholder Account Balance	$ 31,931		$ 31,931		$ 33,622	$ 33,044