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Reinsurance and Policy Provisions (Hannover Financing Arrangements) (Details) - 2019 Hannover Reinsurance Agreement - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Ceded Credit Risk [Line Items] |  |
Lifetime income benefit rider payments in excess of policy fund values and waived surrender charges related to penalty free withdrawals on certain business, percentage | 80.00% |
Risk charges | $ 33.1 | $ 44.7

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- Definition Item represents the percentage of coverage provided by the reinsurance agreement on certain business of lifetime income benefit rider payments in excess of policy fund values and waived surrender charges related to penalty free withdrawals. + References No definition available. + Details
Name: | ael_ReinsuranceLifetimeIncomeBenefitRiderPaymentsinExcessofPolicyFundValuesandWaivedSurrenderChargesRelatedtoPenaltyFreeWithdrawalsonCertainBusinessPercentage
Namespace Prefix: | ael_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Item represents a risk charge percentage that is applied to the oustanding loss carry forward (LCF) to determine the amount due at the end of each accounting period (quarter). + References No definition available. + Details
Name: | ael_ReinsuranceRiskCharge
Namespace Prefix: | ael_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CededCreditRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_CededCreditRiskAxis=ael_Reinsurance2019HannoverReinsuranceAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |