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Notes Payable and Amounts Due Under Repurchase Agreements (Repurchase Agreements Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Debt Disclosure [Abstract]
Repurchase agreement, average borrowings	$ 9.7	$ 5.1	$ 39.4	$ 41.4
Repurchase agreement, maximum amount borrowed			$ 243.6	$ 544.1
Repurchase agreement, weighted average interest rate	2.25%	0.00%	2.97%	1.66%

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