Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies (Summary of Restated Consolidated Balance Sheet) (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 - $110,944; 2021 - $104,491; allowance for credit losses: 2022 - $21; 2021 - $19)	$ 99,465	$ 97,391	$ 102,954	$ 109,889	$ 117,476	$ 120,794	$ 120,452	$ 115,695
Trading securities	3,446	3,527	3,760	4,313	4,405	4,114	4,154	4,287
Equity securities	427	427	412	393	371	260	191	142
Mortgage loans on real estate, net of allowance for credit losses (portion at fair value: 2022 - $487; 2021 - $739)	18,211	17,975	17,830	17,795	17,893	17,633	17,487	17,159
Policy loans	2,345	2,333	2,355	2,325	2,349	2,364	2,395	2,487
Derivative investments	3,519	3,398	3,167	4,574	5,697	5,075	4,729	3,482
Other investments	3,577	3,620	3,782	3,521	3,445	3,302	3,221	3,023
Total investments	130,990	128,671	134,260	142,810	151,636	153,542	152,629	146,275
Cash and invested cash	2,499	1,291	1,277	1,722	2,331	2,194	1,914	1,086	$ 1,462	$ 1,879
Deferred acquisition costs and value of business acquired	13,615	13,765	11,832	8,689	5,986	5,918	6,207	7,606	5,824
Accrued investment income	1,234	1,238	1,196	1,209	1,157	1,251	1,215	1,255
Reinsurance recoverables, net of allowance for credit losses	23,910	24,256	23,554	22,870	22,755	18,207	18,257	18,583
Goodwill	1,144	1,144	1,778	1,778	1,778	1,778	1,778	1,778	1,778
Other assets	21,338	21,560	20,447	22,284	23,292	22,941	22,871	21,930
Separate account assets	143,536	137,295	145,791	168,879	182,583	175,667	178,795	171,339
Total assets	338,266	329,220	340,135	370,241	391,518	381,498	383,666	369,852
Liabilities
Future contract benefits	41,598	41,162	38,735	39,186	40,416	40,016	39,621	38,941
Other contract holder funds	120,360	117,756	114,652	112,399	111,183	108,765	108,249	106,461
Short-term debt	562	771	698	737	1,084	483	457	568
Long-term debt	2,269	2,267	2,267	2,311	2,334	2,333	2,332	2,332
Payables for collateral on investments	6,638	6,855	7,525	8,905	8,936	8,378	8,192	7,593
Other liabilities	15,037	16,635	17,378	19,524	22,122	22,308	21,934	20,415
Separate account liabilities	143,536	137,295	145,791	168,879	182,583	175,667	178,795	171,339
Total liabilities	330,000	322,741	327,046	351,941	368,658	357,950	359,580	347,649
Contingencies and Commitments (See Note 13)
Stockholder’s Equity
Common stock – 10,000,000 shares authorized, issued and outstanding	12,903	12,114	12,020	11,948	11,950	11,940	11,930	11,919
Retained earnings	2,436	2,398	4,962	4,799	4,366	4,664	4,595	4,444
Accumulated other comprehensive income (loss)	(7,073)	(8,033)	(3,893)	1,553	6,544	6,944	7,561	5,840
Total stockholder’s equity	8,266	6,479	13,089	18,300	22,860	23,548	24,086	22,203	25,041
Total liabilities and stockholder’s equity	338,266	329,220	340,135	370,241	391,518	381,498	383,666	369,852
Fixed maturity available-for-sale securities (amortized cost)	110,944	110,323	108,963	106,939	104,491	106,752	105,530	104,684
Fixed maturity, ACL	21	18	12	20	19	17	9	14	13
Mortgage loans on real estate, fair value	$ 487	$ 495	$ 528	$ 537	$ 739	$ 792	$ 818	$ 874
Common 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
Common stock - shares issued (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
Common stock - shares outstanding (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
As Previously Reported [Member]
Investments:
Fixed maturity available-for-sale securities, at fair value (amortized cost: 2022 - $110,944; 2021 - $104,491; allowance for credit losses: 2022 - $21; 2021 - $19)	$ 99,465	$ 97,391	$ 103,002	$ 109,921	$ 117,511	$ 120,794	$ 120,452	$ 115,695
Trading securities	3,446	3,527	3,778	4,334	4,427	4,135	4,175	4,308
Equity securities	427	427	345	340	314	239	170	121
Mortgage loans on real estate, net of allowance for credit losses (portion at fair value: 2022 - $487; 2021 - $739)	18,211	17,975	17,830	17,795	17,893	17,633	17,487	17,159
Policy loans	2,345	2,333	2,355	2,325	2,349	2,364	2,395	2,487
Derivative investments	3,662	3,624	3,370	4,840	5,437	4,828	4,547	3,453
Other investments	3,577	3,627	3,758	3,527	3,449	3,305	3,223	3,024
Total investments	131,133	128,904	134,438	143,082	151,380	153,298	152,449	146,247
Cash and invested cash	2,499	1,291	1,277	1,722	2,331	2,194	1,914	1,086	$ 1,462
Deferred acquisition costs and value of business acquired	13,615	13,757	11,832	8,688	5,985	5,917	6,207	7,606
Accrued investment income	1,234	1,238	1,196	1,209	1,157	1,251	1,215	1,255
Reinsurance recoverables, net of allowance for credit losses	23,910	24,256	23,554	22,870	22,755	18,207	18,257	18,583
Goodwill	1,144	1,144	1,778	1,778	1,778	1,778	1,778	1,778
Other assets	21,523	21,848	20,569	22,490	24,046	23,564	23,513	22,344
Separate account assets	143,536	137,295	145,791	168,879	182,583	175,667	178,795	171,339
Total assets	338,594	329,733	340,435	370,718	392,015	381,876	384,128	370,238
Liabilities
Future contract benefits	41,598	41,162	38,735	39,186	40,416	40,016	39,620	38,940
Other contract holder funds	120,360	117,729	114,634	112,387	111,174	108,762	108,249	106,461
Short-term debt	562	771	698	737	1,084	483	457	568
Long-term debt	2,269	2,267	2,267	2,311	2,334	2,333	2,332	2,332
Payables for collateral on investments	6,638	6,855	7,525	8,905	8,936	8,378	8,192	7,593
Other liabilities	15,833	17,629	18,158	20,484	23,108	22,683	22,394	20,795
Separate account liabilities	143,536	137,295	145,791	168,879	182,583	175,667	178,795	171,339
Total liabilities	330,796	323,708	327,808	352,889	369,635	358,322	360,039	348,028
Contingencies and Commitments (See Note 13)
Stockholder’s Equity
Common stock – 10,000,000 shares authorized, issued and outstanding	12,903	12,114	12,020	11,948	11,950	11,940	11,930	11,919
Retained earnings	1,968	1,944	4,506	4,330	3,886	4,670	4,598	4,451
Accumulated other comprehensive income (loss)	(7,073)	(8,033)	(3,899)	1,551	6,544	6,944	7,561	5,840
Total stockholder’s equity	7,798	6,025	12,627	17,829	22,380	23,554	24,089	22,210
Total liabilities and stockholder’s equity	338,594	329,733	340,435	370,718	392,015	381,876	384,128	370,238
Restatement Impacts [Member]
Investments:
Fixed maturity available-for-sale securities, at fair value (amortized cost: 2022 - $110,944; 2021 - $104,491; allowance for credit losses: 2022 - $21; 2021 - $19)			(48)	(32)	(35)
Trading securities			(18)	(21)	(22)	(21)	(21)	(21)
Equity securities			67	53	57	21	21	21
Derivative investments	(143)	(226)	(203)	(266)	260	247	182	29
Other investments		(7)	24	(6)	(4)	(3)	(2)	(1)
Total investments	(143)	(233)	(178)	(272)	256	244	180	28
Deferred acquisition costs and value of business acquired		8		1	1	1
Other assets	(185)	(288)	(122)	(206)	(754)	(623)	(642)	(414)
Total assets	(328)	(513)	(300)	(477)	(497)	(378)	(462)	(386)
Liabilities
Future contract benefits							1	1
Other contract holder funds		27	18	12	9	3
Other liabilities	(796)	(994)	(780)	(960)	(986)	(375)	(460)	(380)
Total liabilities	(796)	(967)	(762)	(948)	(977)	(372)	(459)	(379)
Contingencies and Commitments (See Note 13)
Stockholder’s Equity
Retained earnings	468	454	456	469	480	(6)	(3)	(7)
Accumulated other comprehensive income (loss)			6	2
Total stockholder’s equity	468	454	462	471	480	(6)	(3)	(7)
Total liabilities and stockholder’s equity	$ (328)	$ (513)	$ (300)	$ (477)	$ (497)	$ (378)	$ (462)	$ (386)