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Subordinated Debentures (Narrative) (Details) - American Equity Capital Trust II
$ in Millions
Dec. 31, 2018
USD ($)
Subordinated Borrowing [Line Items]  
Debt instrument, face amount $ 100.0
Subordinated debentures, fair value at issuance $ 74.7
Interest rate, effective percentage 6.80%
Ownership percentage, Iowa Farm Bureau Federation 50.00%