Schedule I - Summary of Investments (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Investments, Other than Investments in Related Parties [Abstract]

Summary Of Investments Other Than Investments In Related Parties [Table Text Block]

					Amount at
					which shown in
(in millions)			Fair		the Consolidated
Type of Investment	Cost		Value		Balance Sheet
Fixed maturities
Bonds
United States government and government
agencies and authorities	$	541	$	779	$	779
States, municipalities and political subdivisions		1,196		1,287		1,287
Foreign governments		2,360		2,487		2,487
Public utilities		2,187		2,342		2,342
All other corporate bonds		15,107		15,739		15,739
Mortgage and other asset-backed		469		497		497
Redeemable preferred stocks		7		7		7
Total fixed maturities		21,867		23,138		23,138
Equity securities
Common stocks
Industrial, miscellaneous and all other		485		496		496
Non-redeemable preferred stocks		104		92		92
Total equity securities		589		588		588
Commercial mortgage loans on real estate		1,761				1,761
Policy loans		1,415				1,415
Other long-term investments		1,518				1,518
Short-term investments		199				199
Total investments	$	27,349			$	28,619