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Notes and Loan Payable and Amounts Due Under Repurchase Agreements (Repurchase Agreements Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Repurchase agreement, average borrowings	$ 33.0	$ 51.8	$ 40.0
Repurchase agreement, maximum amount borrowed	$ 243.6	$ 544.1	$ 274.5
Repurchase agreement, weighted average interest rate	2.99%	1.90%	0.84%

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