SCHEDULE I - CONSOLIDATED SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES (Details) $ in Millions	Dec. 31, 2019 USD ($)
Summary of investments, other than investments in related parties [Line Items]
Cost	$ 121,313
Carrying Value	133,697
Trading Securities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	4,330
Fair Value	4,673
Carrying Value	4,673
Mortgage Loans On Real Estate [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	16,339
Fair Value	16,872
Carrying Value	16,339
Real estate [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	11
Carrying Value	11
Policy loans [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	2,477
Carrying Value	2,477
Derivative Instruments [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	755	[1]
Fair Value	1,911	[1]
Carrying Value	1,911	[1]
Other Investments [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	2,983
Fair Value	2,983
Carrying Value	2,983
Fixed Maturity AFS Securities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	94,295	[2]
Fair Value	105,200	[2]
Carrying Value	105,200	[2]
Fixed Maturity AFS Securities [Member] | Mortgage-Backed And Asset-Backed Securities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	8,890	[2]
Fair Value	9,213	[2]
Carrying Value	9,213	[2]
Fixed Maturity AFS Securities [Member] | Hybrid And Redeemable Preferred Securities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	497	[2]
Fair Value	559	[2]
Carrying Value	559	[2]
Fixed Maturity AFS Securities [Member] | Bonds [Member] | U.S. government and government agencies and authorities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	384	[2]
Fair Value	435	[2]
Carrying Value	435	[2]
Fixed Maturity AFS Securities [Member] | Bonds [Member] | Foreign governments [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	329	[2]
Fair Value	393	[2]
Carrying Value	393	[2]
Fixed Maturity AFS Securities [Member] | Bonds [Member] | State And Municipal Bonds [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	4,778	[2]
Fair Value	5,884	[2]
Carrying Value	5,884	[2]
Fixed Maturity AFS Securities [Member] | Bonds [Member] | Public utilities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	13,533	[2]
Fair Value	15,374	[2]
Carrying Value	15,374	[2]
Fixed Maturity AFS Securities [Member] | Bonds [Member] | All other corporate bonds [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	65,884	[2]
Fair Value	73,342	[2]
Carrying Value	73,342	[2]
Equity Securities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	123
Fair Value	103
Carrying Value	103
Equity Securities [Member] | Nonredeemable preferred securities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	48
Fair Value	38
Carrying Value	38
Equity Securities [Member] | Common Stock [Member] | Public utilities [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	5
Fair Value	4
Carrying Value	4
Equity Securities [Member] | Common Stock [Member] | Banks, trusts, and insurance companies [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	35
Fair Value	35
Carrying Value	35
Equity Securities [Member] | Common Stock [Member] | Industrial, miscellaneous and all other [Member]
Summary of investments, other than investments in related parties [Line Items]
Cost	35
Fair Value	26
Carrying Value	26
Parent Company [Member]
Summary of investments, other than investments in related parties [Line Items]
Derivative Liabilities	110
Parent Company [Member] | Other Liabilities [Member]
Summary of investments, other than investments in related parties [Line Items]
Derivative Liabilities	$ 349

[1] Derivative investment assets were offset by $349 million in derivative liabilities reflected in other liabilities on our Consolidated Balance Sheets.

[2] Investments deemed to have declines in value that are other-than-temporary are written down or reserved for to reduce the carrying value to their estimated realizable value.