v3.26.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 08, 2026
Document Information [Line Items]    
Entity Registrant Name Apartment Investment and Management Company  
Entity Central Index Key 0000922864  
Document Type 10-Q  
Document Period End Date Mar. 31, 2026  
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company false  
Trading Symbol AIV  
Entity File Number 1-13232  
Entity Tax Identification Number 84-1259577  
Entity Incorporation, State or Country Code MD  
Entity Address, Address Line One 4582 South Ulster Street  
Entity Address, Address Line Two Suite 1450  
Entity Address, City or Town Denver  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80237  
City Area Code 833  
Local Phone Number 373-1300  
Entity Common Stock, Shares Outstanding   143,856,183
Title of 12(b) Security Class A Common Stock (Apartment Investment and Management Company)  
Security Exchange Name NYSE  
Document Quarterly Report true  
Document Transition Report false  
Aimco OP L.P. [Member]    
Document Information [Line Items]    
Entity Registrant Name Aimco OP L.P.  
Entity Central Index Key 0000926660  
Document Type 10-Q  
Document Period End Date Mar. 31, 2026  
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company false  
Entity File Number 0-56223  
Entity Tax Identification Number 85-2460835  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 4582 South Ulster Street  
Entity Address, Address Line Two Suite 1450  
Entity Address, City or Town Denver  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80237  
City Area Code 833  
Local Phone Number 373-1300