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Notes Payable and Amounts Due Under Repurchase Agreements (Repurchase Agreements Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Debt Disclosure [Abstract]
Repurchase agreement, average borrowings	$ 89.2	$ 7.6
Repurchase agreement, maximum amount borrowed	$ 243.6	$ 137.3
Repurchase agreement, weighted average interest rate	2.67%	1.63%

X

- Definition

The average amount borrowed during the reporting period on repurchase agreements.

+ References

No definition available.

+ Details

Name:	ael_RepurchaseAgreementAverageBorrowings
Namespace Prefix:	ael_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The average rate of interest paid on the amount borrowed on securities repurchase agreements during the period.

+ References

No definition available.

+ Details

Name:	ael_RepurchaseAgreementAverageInterestRate
Namespace Prefix:	ael_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The maximum amount borrowed on repurchase agreements during the reporting period.

+ References

No definition available.

+ Details

Name:	ael_RepurchaseAgreementMaximumAmountBorrowed
Namespace Prefix:	ael_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DebtDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration