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			$ 113,972
Interest credited	$ 804	$ 706	1,585	$ 1,399
Balance as of end-of-year	117,156		117,156		$ 113,972
UL and Other [Member]
Policyholder Account Balance [Line Items]
Balance as of beginning-of-year			37,258	37,719	37,719
Gross deposits			1,826		3,905
Withdrawals			(705)		(1,215)
Policyholder assessments			(2,224)		(4,446)
Net transfers from (to) separate account			76		2
Interest credited			735		1,476
Change in fair value of embedded derivative instrument			76		(183)
Balance as of end-of-year	$ 37,042		$ 37,042		$ 37,258
Weighted-average crediting rate	4.00%		4.00%		3.90%
Net Amount at Risk	$ 301,018		$ 301,018		$ 302,481
Cash surrender value	32,822		32,822		33,130
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-year	$ 26,257		$ 26,257		$ 22,184
Weighted-average crediting rate	2.00%		2.00%		1.40%
Net Amount at Risk	$ 4,783		$ 4,783		$ 7,974
Cash surrender value	25,146		25,146		21,147
Fixed Annuities [Member]
Policyholder Account Balance [Line Items]
Balance as of beginning-of-year			23,338	22,522	22,522
Gross deposits			1,919		3,284
Withdrawals			(1,920)		(2,511)
Policyholder assessments			(28)		(51)
Interest credited			312		532
Change in fair value of embedded derivative instrument			165		(438)
Balance as of end-of-year	$ 23,786		$ 23,786		$ 23,338
Weighted-average crediting rate	2.60%		2.60%		2.40%
Net Amount at Risk	$ 213		$ 213		$ 171
Cash surrender value	22,889		22,889		22,502
Retirement Plan Services Segment [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-year	$ 24,430		$ 24,430		$ 25,138
Weighted-average crediting rate	2.70%		2.70%		2.60%
Net Amount at Risk	$ 6		$ 6		$ 15
Cash surrender value	24,425		24,425		25,133
Other [Member]
Policyholder Account Balance [Line Items]
Balance as of beginning-of-year			6,054
Balance as of end-of-year	$ 5,641		$ 5,641		$ 6,054