Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]: Deposit Contracts, Policy (Policies)	12 Months Ended
Dec. 31, 2017
Policies
Deposit Contracts, Policy	Funds received (net of mortality and expense charges) for certain long-duration contracts (principally deferred annuities and universal life policies) are credited directly to a policyholder liability account, funds on deposit. Withdrawals are recorded directly as a reduction of respective policyholders' funds on deposit. Amounts on deposit were credited at annual rates ranging from 3.0% to 6.0% in 2017, 3.0% to 6.0% in 2016, and 3.0% to 7.0% in 2015.

Disclosure of accounting policy for the treatment of funds received from or paid to insureds, insurers and reinsurers on contracts for which the criteria for transferring or assuming insurance risk has not been satisfied by the insurer or reinsurer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 825
-Section 05
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6487483&loc=d3e32239-158577

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

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