Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies (Summary of Restated Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments:
Fixed maturity available-for-sale securities, at fair value (amortized cost: 2022 - $111,707; 2021 - $105,142; allowance for credit losses: 2022 - $22; 2021 - $19)	$ 99,736	$ 97,572	$ 103,317	$ 110,663	$ 118,711	$ 122,085	$ 122,215	$ 117,313
Trading securities	3,498	3,580	3,803	4,364	4,460	4,170	4,211	4,344
Equity securities	427	427	411	399	375	264	195	144
Mortgage loans on real estate, net of allowance for credit losses (portion at fair value: 2022 - $487; 2021 - $739)	18,301	18,066	17,922	17,892	17,991	17,730	17,586	17,255
Policy loans	2,359	2,347	2,368	2,339	2,364	2,379	2,410	2,502
Derivative investments	3,594	3,455	3,167	4,573	5,697	5,075	4,730	3,482
Other investments	3,739	3,813	4,078	4,122	4,288	4,066	3,948	3,547
Total investments	131,654	129,260	135,066	144,352	153,886	155,769	155,295	148,587
Cash and invested cash	3,343	1,472	1,567	1,960	2,612	2,614	2,389	1,350	$ 1,708	$ 2,563
Deferred acquisition costs and value of business acquired	13,588	13,684	11,872	8,811	6,083	5,966	6,261	7,665	5,812
Accrued investment income	1,253	1,283	1,226	1,247	1,189	1,297	1,254	1,301
Reinsurance recoverables, net of allowance for credit losses	19,882	20,045	19,909	20,044	20,295	15,729	15,981	16,289
Goodwill	1,144	1,144	1,778	1,778	1,778	1,778	1,778	1,778
Other assets	20,708	19,991	18,137	18,467	18,519	18,076	18,125	18,264
Separate account assets	143,536	137,295	145,791	168,879	182,583	175,667	178,795	171,339
Total assets	335,108	324,174	335,346	365,538	386,945	376,896	379,878	366,573
Liabilities
Future contract benefits	42,151	41,716	39,309	39,776	41,030	40,641	40,251	39,592
Other contract holder funds	120,800	118,201	115,145	112,913	111,710	109,300	108,778	107,002
Short-term debt	500	500			300	300	300	300
Long-term debt	5,955	5,959	6,498	6,561	6,325	6,323	6,334	6,294
Payables for collateral on investments	6,712	6,865	7,524	8,927	8,946	8,379	8,199	7,597
Other liabilities	10,885	10,970	11,425	13,298	15,297	15,121	15,479	14,862
Separate account liabilities	143,536	137,295	145,791	168,879	182,583	175,667	178,795	171,339
Total liabilities	330,539	321,506	325,692	350,354	366,191	355,731	358,136	346,986
Contingencies and Commitments (See Note 13)
Stockholders' Equity
Preferred stock - 10,000,000 shares authorized
Common stock – 800,000,000 shares authorized; 169,220,511 and 177,193,515 shares issued and outstanding as of December 31, 2022, and December 31, 2021, respectively	4,544	4,534	4,546	4,586	4,735	4,956	5,021	5,057
Retained earnings	6,707	6,762	9,445	9,346	9,578	9,360	9,242	8,769
Accumulated other comprehensive income (loss)	(7,668)	(8,628)	(4,337)	1,252	6,441	6,849	7,479	5,761
Total stockholders' equity	4,569	2,668	9,654	15,184	20,754	21,165	21,742	19,587	22,699
Total liabilities and stockholders' equity	335,108	324,174	335,346	365,538	386,945	376,896	379,878	366,573
Fixed maturity securities (amortized cost)	111,707	111,058	109,592	107,587	105,142	107,459	106,668	105,866
Fixed maturity, ACL	22	18	12	20	19	17	9	14
Mortgage loans on real estate, fair value	$ 487	$ 495	$ 528	$ 537	$ 739	$ 792	$ 818	$ 874
Preferred stock - shares authorized (in shares)	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000
Preferred stock - shares issued (in shares)	40,000
Preferred stock - shares outstanding (in shares)	40,000
Common stock - shares authorized (in shares)	800,000,000	800,000,000	800,000,000	800,000,000	800,000,000	800,000,000	800,000,000	800,000,000
Common stock - shares issued (in shares)	169,220,511	169,214,493	170,224,116	171,890,974	177,193,515	186,089,222	189,089,948	191,149,192
Common stock - shares outstanding (in shares)	169,220,511	169,214,493	170,224,116	171,890,974	177,193,515	186,089,222	189,089,948	191,149,192
Series C Preferred Stock [Member]
Stockholders' Equity
Preferred stock - 10,000,000 shares authorized	$ 493
Preferred stock - shares authorized (in shares)	20,000
Preferred stock - shares issued (in shares)	20,000
Preferred stock - shares outstanding (in shares)	20,000
Series D Preferred Stock [Member]
Stockholders' Equity
Preferred stock - 10,000,000 shares authorized	$ 493
Preferred stock - shares authorized (in shares)	20,000
Preferred stock - shares issued (in shares)	20,000
Preferred stock - shares outstanding (in shares)	20,000
As Previously Reported [Member]
Investments:
Fixed maturity available-for-sale securities, at fair value (amortized cost: 2022 - $111,707; 2021 - $105,142; allowance for credit losses: 2022 - $22; 2021 - $19)	$ 99,736	$ 97,572	$ 103,365	$ 110,695	$ 118,746	$ 122,085	$ 122,215	$ 117,313
Trading securities	3,498	3,580	3,822	4,385	4,482	4,191	4,232	4,365
Equity securities	427	427	344	346	318	243	174	123
Mortgage loans on real estate, net of allowance for credit losses (portion at fair value: 2022 - $487; 2021 - $739)	18,301	18,066	17,922	17,892	17,991	17,730	17,586	17,255
Policy loans	2,359	2,347	2,368	2,339	2,364	2,379	2,410	2,502
Derivative investments	3,736	3,681	3,370	4,840	5,437	4,828	4,548	3,453
Other investments	3,739	3,820	4,054	4,127	4,292	4,069	3,950	3,548
Total investments	131,796	129,493	135,245	144,624	153,630	155,525	155,115	148,559
Cash and invested cash	3,343	1,472	1,567	1,960	2,612	2,614	2,389	1,350	$ 1,708
Deferred acquisition costs and value of business acquired	13,588	13,676	11,872	8,810	6,081	5,965	6,261	7,665
Accrued investment income	1,253	1,283	1,226	1,247	1,189	1,297	1,254	1,301
Reinsurance recoverables, net of allowance for credit losses	19,882	20,045	19,909	20,044	20,295	15,729	15,981	16,289
Goodwill	1,144	1,144	1,778	1,778	1,778	1,778	1,778	1,778
Other assets	20,895	20,275	18,381	18,587	19,133	18,477	18,575	18,479
Separate account assets	143,536	137,295	145,791	168,879	182,583	175,667	178,795	171,339
Total assets	335,437	324,683	335,769	365,929	387,301	377,052	380,148	366,760
Liabilities
Future contract benefits	42,151	41,716	39,306	39,773	41,030	40,641	40,250	39,591
Other contract holder funds	120,800	118,174	115,127	112,901	111,702	109,297	108,778	107,002
Short-term debt	500	500			300	300	300	300
Long-term debt	5,955	5,959	6,498	6,561	6,325	6,323	6,334	6,294
Payables for collateral on investments	6,712	6,865	7,524	8,927	8,946	8,379	8,199	7,597
Other liabilities	11,682	11,957	12,335	14,176	16,143	15,275	15,747	15,044
Separate account liabilities	143,536	137,295	145,791	168,879	182,583	175,667	178,795	171,339
Total liabilities	331,336	322,466	326,581	351,217	367,029	355,882	358,403	347,167
Contingencies and Commitments (See Note 13)
Stockholders' Equity
Preferred stock - 10,000,000 shares authorized
Common stock – 800,000,000 shares authorized; 169,220,511 and 177,193,515 shares issued and outstanding as of December 31, 2022, and December 31, 2021, respectively	4,544	4,534	4,546	4,586	4,735	4,956	5,021	5,057
Retained earnings	6,239	6,311	8,985	8,876	9,096	9,365	9,245	8,775
Accumulated other comprehensive income (loss)	(7,668)	(8,628)	(4,343)	1,250	6,441	6,849	7,479	5,761
Total stockholders' equity	4,101	2,217	9,188	14,712	20,272	21,170	21,745	19,593
Total liabilities and stockholders' equity	335,437	324,683	335,769	365,929	387,301	377,052	380,148	366,760
As Previously Reported [Member] | Series C Preferred Stock [Member]
Stockholders' Equity
Preferred stock - 10,000,000 shares authorized	493
As Previously Reported [Member] | Series D Preferred Stock [Member]
Stockholders' Equity
Preferred stock - 10,000,000 shares authorized	493
Restatement Impacts [Member]
Investments:
Fixed maturity available-for-sale securities, at fair value (amortized cost: 2022 - $111,707; 2021 - $105,142; allowance for credit losses: 2022 - $22; 2021 - $19)			(48)	(32)	(35)
Trading securities			(19)	(21)	(22)	(21)	(21)	(21)
Equity securities			67	53	57	21	21	21
Derivative investments	(142)	(226)	(203)	(267)	260	247	182	29
Other investments		(7)	24	(5)	(4)	(3)	(2)	(1)
Total investments	(142)	(233)	(179)	(272)	256	244	180	28
Deferred acquisition costs and value of business acquired		8		1	2	1
Other assets	(187)	(284)	(244)	(120)	(614)	(401)	(450)	(215)
Total assets	(329)	(509)	(423)	(391)	(356)	(156)	(270)	(187)
Liabilities
Future contract benefits			3	3			1	1
Other contract holder funds		27	18	12	8	3
Other liabilities	(797)	(987)	(910)	(878)	(846)	(154)	(268)	(182)
Total liabilities	(797)	(960)	(889)	(863)	(838)	(151)	(267)	(181)
Contingencies and Commitments (See Note 13)
Stockholders' Equity
Preferred stock - 10,000,000 shares authorized
Retained earnings	468	451	460	470	482	(5)	(3)	(6)
Accumulated other comprehensive income (loss)			6	2
Total stockholders' equity	468	451	466	472	482	(5)	(3)	(6)
Total liabilities and stockholders' equity	$ (329)	$ (509)	$ (423)	$ (391)	$ (356)	$ (156)	$ (270)	$ (187)