Investments (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Assets
Mortgage Loans on Real Estate, Commerical and Consumer Net	$ 12,237	$ 10,640
Accrued investment income relating to variable interest entities	583	575
Liabilities:
Long-term debt, at estimated fair value, relating to variable interest entities	40	46
Consolidated securitization entities
Assets
Mortgage Loans on Real Estate, Commerical and Consumer Net	96	115
Accrued investment income relating to variable interest entities	0	1
Variable Interest Entity, Consolidated, Carrying Amount, Assets	96	116
Liabilities:
Long-term debt, at estimated fair value, relating to variable interest entities	5	11
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 5	$ 11

Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

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