Fair Value of Financial Instruments (Carrying and Estimated Fair Values of Financial Instruments) (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
Assets
Fixed maturity AFS securities	$ 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	18,211	17,975	17,830	17,795	17,893	17,633	17,487	17,159
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
Other contract holder funds:
Benefit Plans' Assets	86				116
Carrying Value [Member]
Assets
Trading securities	3,446				4,405
Equity securities	427				371
Mortgage loans on real estate	18,211				17,893
Derivative investments	3,519				5,697
Other investments	3,577				3,435
Cash and invested cash	2,499				2,331
Reinsurance related embedded derivatives	681
Indexed annuity ceded embedded derivatives	525				528
LPR ceded derivative	212				318
Separate account assets	143,536				182,583
Other contract holder funds:
Remaining guaranteed interest and similar contracts	(1,686)				(1,788)
Account values of certain investment contracts	(43,545)				(41,164)
Short-term debt	(562)				(1,084)
Long-term debt	(2,269)				(2,334)
Reinsurance related embedded derivatives					(578)
Fair Value [Member]
Assets
Trading securities	3,446				4,405
Equity securities	427				371
Mortgage loans on real estate	16,477				18,599
Derivative investments	3,519				5,697
Other investments	3,577				3,435
Cash and invested cash	2,499				2,331
Reinsurance related embedded derivatives	681
Indexed annuity ceded embedded derivatives	525				528
LPR ceded derivative	212				318
Separate account assets	143,536				182,583
Other contract holder funds:
Remaining guaranteed interest and similar contracts	(1,686)				(1,788)
Account values of certain investment contracts	(34,244)				(47,828)
Short-term debt	(562)				(1,084)
Long-term debt	(2,166)				(2,675)
Reinsurance related embedded derivatives					(578)
Fixed Maturity AFS Securities [Member]
Assets
Trading securities	3,446				4,405
Fixed Maturity AFS Securities [Member] | Carrying Value [Member]
Assets
Fixed maturity AFS securities	99,465				117,476
Fixed Maturity AFS Securities [Member] | Fair Value [Member]
Assets
Fixed maturity AFS securities	99,465				117,476
GLB Direct Embedded Derivatives [Member] | Carrying Value [Member]
Assets
Other assets - GLB embedded derivatives	1,697				1,967
GLB Direct Embedded Derivatives [Member] | Fair Value [Member]
Assets
Other assets - GLB embedded derivatives	1,697				1,967
GLB Ceded Embedded Derivatives [Member] | Carrying Value [Member]
Assets
Other assets - GLB embedded derivatives	29				56
GLB Ceded Embedded Derivatives [Member] | Fair Value [Member]
Assets
Other assets - GLB embedded derivatives	29				56
Future Contract Benefits [Member] | Carrying Value [Member]
Future contract benefits:
Indexed annuity and IUL contracts embedded derivatives	(4,783)				(6,131)
Future Contract Benefits [Member] | Fair Value [Member]
Future contract benefits:
Indexed annuity and IUL contracts embedded derivatives	(4,783)				(6,131)
Other Liabilities [Member] | Carrying Value [Member]
Other contract holder funds:
Other liabilities - derivative liabilities	(254)				(281)
Other Liabilities [Member] | Fair Value [Member]
Other contract holder funds:
Other liabilities - derivative liabilities	(254)				(281)
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Carrying Value [Member]
Other contract holder funds:
Other liabilities - GLB embedded derivatives	(1,721)				(2,018)
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Fair Value [Member]
Other contract holder funds:
Other liabilities - GLB embedded derivatives	$ (1,721)				$ (2,018)