Fair Value of Financial Instruments (Carrying and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets
Fixed maturity AFS securities	$ 118,746	$ 123,044
Trading securities	4,482	4,501
Equity securities	318	129
Mortgage loans on real estate	17,991	16,763
Derivative investments	5,437	3,109
Other investments	4,292	3,984
Other contract holder funds:
Benefit Plans' Assets	1,734	1,736
Carrying Value [Member]
Assets
Trading securities	4,482	4,501
Equity securities	318	129
Mortgage loans on real estate	17,991	16,763
Derivative investments	5,437	3,109
Other investments	4,284	3,974
Cash and invested cash	2,612	1,708
Other assets - GLB embedded derivatives	1,963	450
Other assets - GLB ceded embedded derivatives	56	82
Indexed annuity ceded embedded derivatives	528	550
Separate account assets	182,583	167,965
Other contract holder funds:
Remaining guaranteed interest and similar contracts	(1,788)	(1,854)
Account values of certain investment contracts	(41,194)	(40,947)
Short-term debt	(300)
Long-term debt	(6,325)	(6,682)
Reinsurance related embedded derivatives	(206)	(392)
Fair Value [Member]
Assets
Trading securities	4,482	4,501
Equity securities	318	129
Mortgage loans on real estate	18,700	18,219
Derivative investments	5,437	3,109
Other investments	4,284	3,974
Cash and invested cash	2,612	1,708
Other assets - GLB embedded derivatives	1,963	450
Other assets - GLB ceded embedded derivatives	56	82
Indexed annuity ceded embedded derivatives	528	550
Separate account assets	182,583	167,965
Other contract holder funds:
Remaining guaranteed interest and similar contracts	(1,788)	(1,854)
Account values of certain investment contracts	(47,862)	(49,745)
Short-term debt	(302)
Long-term debt	(6,707)	(7,067)
Reinsurance related embedded derivatives	(206)	(392)
Fixed Maturity AFS Securities [Member] | Carrying Value [Member]
Assets
Fixed maturity AFS securities	118,746	123,044
Fixed Maturity AFS Securities [Member] | Fair Value [Member]
Assets
Fixed maturity AFS securities	118,746	123,044
Future Contract Benefits [Member] | Carrying Value [Member]
Future contract benefits:
Indexed annuity and IUL contracts embedded derivatives	(6,131)	(3,594)
Future Contract Benefits [Member] | Fair Value [Member]
Future contract benefits:
Indexed annuity and IUL contracts embedded derivatives	(6,131)	(3,594)
Other Liabilities [Member] | Carrying Value [Member]
Other contract holder funds:
Other liabilities - derivative liabilities	(677)	(906)
Other Liabilities [Member] | Fair Value [Member]
Other contract holder funds:
Other liabilities - derivative liabilities	(677)	$ (906)
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Carrying Value [Member]
Other contract holder funds:
Other liabilities - GLB embedded derivatives	(182)
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Fair Value [Member]
Other contract holder funds:
Other liabilities - GLB embedded derivatives	$ (182)