Insurance (Policyholder Account Balances) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Policyholder Account Balance [Line Items]
Interest credited	$ 446	$ 277	$ 862	$ 519
Policyholder Account Balance, Ending Balance	77,742	65,763	77,742	65,763
Universal Life Insurance
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance			2,100	2,134
Premiums and deposits			103	100
Surrenders and withdrawals			(74)	(25)
Benefit payments			(39)	(30)
Net transfers from (to) separate account			7	12
Interest credited			(3)	18
Policy charges			(100)	(100)
Changes related to embedded derivatives			0	0
Policyholder Account Balance, Ending Balance	$ 1,994	$ 2,109	$ 1,994	$ 2,109
Weighted-average crediting rate (2)	(0.15%)	0.85%	(0.15%)	0.85%
Variable Annuities
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance			$ 4,664	$ 4,475
Premiums and deposits			43	86
Surrenders and withdrawals			(303)	(210)
Benefit payments			(54)	(53)
Net transfers from (to) separate account			9	136
Interest credited			75	79
Policy charges			(13)	(14)
Changes related to embedded derivatives			0	0
Policyholder Account Balance, Ending Balance	$ 4,421	$ 4,499	$ 4,421	$ 4,499
Weighted-average crediting rate (2)	1.65%	1.76%	1.65%	1.76%
Index-linked Annuities
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance			$ 33,897	$ 32,000
Premiums and deposits			3,390	3,431
Surrenders and withdrawals			(1,613)	(999)
Benefit payments			(117)	(77)
Net transfers from (to) separate account			0	0
Interest credited			203	149
Policy charges			(4)	(3)
Changes related to embedded derivatives			2,793	(3,575)
Policyholder Account Balance, Ending Balance	$ 38,549	$ 30,926	$ 38,549	$ 30,926
Weighted-average crediting rate (2)	0.66%	0.56%	0.66%	0.56%
Fixed Rate Annuities
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance			$ 14,274	$ 11,849
Premiums and deposits			1,479	340
Surrenders and withdrawals			(874)	(276)
Benefit payments			(203)	(166)
Net transfers from (to) separate account			0	0
Interest credited			229	150
Policy charges			0	0
Changes related to embedded derivatives			0	0
Policyholder Account Balance, Ending Balance	$ 14,905	$ 11,897	$ 14,905	$ 11,897
Weighted-average crediting rate (2)	1.57%	1.28%	1.57%	1.28%
ULSG
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance			$ 5,307	$ 5,569
Premiums and deposits			339	356
Surrenders and withdrawals			(12)	(15)
Benefit payments			(55)	(37)
Net transfers from (to) separate account			0	0
Interest credited			122	107
Policy charges			(513)	(526)
Changes related to embedded derivatives			0	0
Policyholder Account Balance, Ending Balance	$ 5,188	$ 5,454	$ 5,188	$ 5,454
Weighted-average crediting rate (2)	2.33%	1.94%	2.33%	1.94%
Company-Owned Life Insurance
Policyholder Account Balance [Line Items]
Policyholder Account Balance, Beginning Balance			$ 641	$ 646
Premiums and deposits			0	0
Surrenders and withdrawals			0	0
Benefit payments			(4)	(4)
Net transfers from (to) separate account			0	2
Interest credited			15	11
Policy charges			(6)	(3)
Changes related to embedded derivatives			0	0
Policyholder Account Balance, Ending Balance	$ 646	$ 652	$ 646	$ 652
Weighted-average crediting rate (2)	2.33%	1.69%	2.33%	1.69%