Fair Value of Financial Instruments (Carrying and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets
Fixed maturity AFS securities	$ 99,736	$ 118,746
Trading securities	3,498	4,482
Equity securities	427	318
Mortgage loans on real estate	18,301	17,991
Derivative investments	3,736	5,437
Other investments	$ 3,739	$ 4,292
Other contract holder funds:
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Derivative Liability, Statement of Financial Position [Extensible Enumeration]
Benefit Plans' Assets	$ 1,197	$ 1,734
Carrying Value [Member]
Assets
Trading securities	3,498	4,482
Equity securities	427	318
Mortgage loans on real estate	18,301	17,991
Derivative investments	3,736	5,437
Other investments	3,739	4,284
Cash and invested cash	3,343	2,612
Reinsurance related embedded derivatives	416
Other assets - GLB embedded derivatives	1,697	1,963
Other assets - GLB ceded embedded derivatives	29	56
Indexed annuity ceded embedded derivatives	525	528
Reinsurance related embedded derivatives	416
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	(43,573)	(41,194)
Short-term debt	(500)	(300)
Long-term debt	(5,955)	(6,325)
Reinsurance related embedded derivatives		(206)
Fair Value [Member]
Assets
Trading securities	3,498	4,482
Equity securities	427	318
Mortgage loans on real estate	16,553	18,700
Derivative investments	3,736	5,437
Other investments	3,739	4,284
Cash and invested cash	3,343	2,612
Reinsurance related embedded derivatives	416
Other assets - GLB embedded derivatives	1,697	1,963
Other assets - GLB ceded embedded derivatives	29	56
Indexed annuity ceded embedded derivatives	525	528
Reinsurance related embedded derivatives	416
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	(34,268)	(47,862)
Short-term debt	(496)	(302)
Long-term debt	(5,005)	(6,707)
Reinsurance related embedded derivatives		(206)
Fixed Maturity AFS Securities [Member] | Carrying Value [Member]
Assets
Fixed maturity AFS securities	99,736	118,746
Fixed Maturity AFS Securities [Member] | Fair Value [Member]
Assets
Fixed maturity AFS securities	99,736	118,746
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	(177)	(677)
Other Liabilities [Member] | Fair Value [Member]
Other contract holder funds:
Other liabilities - derivative liabilities	(177)	(677)
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Carrying Value [Member]
Other contract holder funds:
Other liabilities - GLB embedded derivatives	(167)	(182)
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Fair Value [Member]
Other contract holder funds:
Other liabilities - GLB embedded derivatives	$ (167)	$ (182)