Policyholder Account Balances (Summary of Balances and Changes in Policyholder Account Balances) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Policyholder Account Balance [Line Items]
Balance as of beginning-of-year			$ 114,435
Interest credited	$ 808	$ 710	1,593	$ 1,407
Balance as of end-of-period	117,598		117,598		$ 114,435
Reinsurance recoverables, net of allowance for credit losses	19,030		19,030		19,443
UL and Other [Member]
Policyholder Account Balance [Line Items]
Balance as of beginning-of-year			37,694	38,200	38,200
Gross deposits			1,834		3,921
Withdrawals			(717)		(1,244)
Policyholder assessments			(2,248)		(4,496)
Net transfers from (to) separate account			75		2
Interest credited			744		1,494
Change in fair value of embedded derivative instrument			76		(183)
Balance as of end-of-period	$ 37,458		$ 37,458		$ 37,694
Weighted-average crediting rate	4.00%		4.00%		3.90%
Net amount at risk			$ 302,804		$ 304,348
Cash surrender value			33,886		34,210
Variable Annuities [Member]
Policyholder Account Balance [Line Items]
Balance as of beginning-of-year			22,184	19,148	19,148
Gross deposits			2,437		5,178
Withdrawals			(328)		(417)
Policyholder assessments			(1)		(2)
Net transfers from (to) separate account			(198)		(492)
Interest credited			240		287
Change in fair value of embedded derivative instrument			1,923		(1,518)
Balance as of end-of-period	$ 26,257		$ 26,257		$ 22,184
Weighted-average crediting rate	2.00%		2.00%		1.40%
Net amount at risk			$ 4,783		$ 7,974
Cash surrender value			25,146		21,147
Fixed Annuities [Member]
Policyholder Account Balance [Line Items]
Balance as of beginning-of-year			23,365	22,552	22,552
Gross deposits			1,919		3,284
Withdrawals			(1,920)		(2,514)
Policyholder assessments			(28)		(51)
Interest credited			312		532
Change in fair value of embedded derivative instrument			165		(438)
Balance as of end-of-period	$ 23,813		$ 23,813		$ 23,365
Weighted-average crediting rate	2.60%		2.60%		2.40%
Net amount at risk			$ 213		$ 171
Cash surrender value			22,915		22,529
Retirement Plan Services [Member]
Policyholder Account Balance [Line Items]
Balance as of beginning-of-year			25,138	$ 23,579	23,579
Gross deposits			1,317		4,012
Withdrawals			(2,094)		(3,579)
Policyholder assessments			(7)		(13)
Net transfers from (to) separate account			(259)		510
Interest credited			335		629
Balance as of end-of-period	$ 24,430		$ 24,430		$ 25,138
Weighted-average crediting rate	2.70%		2.70%		2.60%
Net amount at risk			$ 6		$ 15
Cash surrender value			$ 24,425		$ 25,133