Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 23, 2022	Jun. 30, 2021
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-31911
Entity Registrant Name	American Equity Investment Life Holding Co
Entity Incorporation, State or Country Code	IA
Entity Tax Identification Number	42-1447959
Entity Address, Address Line One	6000 Westown Parkway
Entity Address, City or Town	West Des Moines
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	50266
City Area Code	515
Local Phone Number	221-0002
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,945,865,287
Entity Common Stock, Shares Outstanding		96,949,174
Entity Central Index Key	0001039828
Document Period End Date	Dec. 31, 2021
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common stock, par value $1
Trading Symbol	AEL
Security Exchange Name	NYSE
Preferred Stock, Series A
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/1,000th interest in a share of 5.95% Fixed-Rate Reset Non-Cumulative Preferred Stock, Series A
Trading Symbol	AELPRA
Security Exchange Name	NYSE
Preferred Stock, Series B
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/1,000th interest in a share of 6.625% Fixed-Rate Reset Non-Cumulative Preferred Stock, Series B
Trading Symbol	AELPRB
Security Exchange Name	NYSE