Cover Page - shares	9 Months Ended
	Sep. 30, 2023	Nov. 01, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	1-39686
Entity Registrant Name	APARTMENT INCOME REIT CORP.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	84-1299717
Entity Address, Address Line One	4582 South Ulster Street
Entity Address, Address Line Two	Suite 1700
Entity Address, City or Town	Denver
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80237
City Area Code	303
Local Phone Number	757-8101
Title of 12(b) Security	Class A Common Stock (Apartment Income REIT Corp.)
Trading Symbol	AIRC
Security Exchange Name	NYSE
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		146,992,711
Entity Central Index Key	0001820877
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Apartment Income REIT, L.P.
Document Information [Line Items]
Entity File Number	0-24497
Entity Registrant Name	APARTMENT INCOME REIT, L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-1275621
Entity Address, Postal Zip Code	80237
City Area Code	303
Local Phone Number	757-8101
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
Entity Shell Company	false
Entity Central Index Key	0000926660
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31