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Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Feb. 21, 2025
Jun. 30, 2024
Document Information [Line Items]        
Entity Registrant Name Apartment Investment and Management Company      
Entity Central Index Key 0000922864      
Document Type 10-K      
Document Period End Date Dec. 31, 2024      
Amendment Flag false      
Document Fiscal Year Focus 2024      
Document Fiscal Period Focus FY      
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 Well-known Seasoned Issuer Yes      
Entity Voluntary Filers No      
Entity Small Business false      
Entity Shell Company false      
Trading Symbol AIV      
Entity File Number 1-13232      
Entity Tax Identification Number 84-1259577      
Entity Address, State or Province 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 303      
Local Phone Number 224-7900      
Entity Common Stock, Shares Outstanding     141,967,654  
Title of 12(b) Security Class A Common Stock (Apartment Investment and Management Company)      
Security Exchange Name NYSE      
Document Annual Report true      
Document Transition Report false      
ICFR Auditor Attestation Flag true      
Documents Incorporated by Reference

Documents Incorporated by Reference

Portions of Apartment Investment and Management Company's definitive proxy statement to be issued in conjunction with Apartment Investment and Management Company's annual meeting of stockholders to be held June 10, 2025, are incorporated by reference into Part III of this Annual Report.

      
Document Financial Statement Error Correction false      
Entity Public Float       $ 1.1
Auditor Firm ID 248 42    
Auditor Name GRANT THORNTON LLP Ernst & Young LLP    
Auditor Location Denver, Colorado Denver, Colorado    
Auditor Opinion

Opinion on the financial statements

We have audited the accompanying consolidated balance sheet of Apartment Investment and Management Company (a Maryland corporation) and subsidiaries (the “Company”) as of December 31, 2024, the related consolidated statements of operations, equity, and cash flows for the year ended December 31, 2024, and the related notes and financial statement schedule included under Item 15(a) (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024, and the results of its operations and its cash flows for the year ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Company’s internal control over financial reporting as of December 31, 2024, based on criteria established in the 2013 Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”), and our report dated February 24, 2025 expressed an unqualified opinion.

      
Aimco OP L.P. [Member]        
Document Information [Line Items]        
Entity Registrant Name Aimco OP L.P.      
Entity Central Index Key 0000926660      
Document Type 10-K      
Document Period End Date Dec. 31, 2024      
Amendment Flag false      
Document Fiscal Year Focus 2024      
Document Fiscal Period Focus FY      
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 true      
Entity Ex Transition Period true      
Entity Well-known Seasoned Issuer Yes      
Entity Voluntary Filers No      
Entity Small Business false      
Entity Shell Company false      
Entity File Number 0-56223      
Entity Tax Identification Number 85-2460835      
Entity Address, State or Province 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 303      
Local Phone Number 224-7900      
ICFR Auditor Attestation Flag true      
Auditor Firm ID 248 42    
Auditor Name GRANT THORNTON LLP Ernst & Young LLP    
Auditor Location Denver, Colorado Denver, Colorado    
Auditor Opinion

Opinion on the financial statements

We have audited the accompanying consolidated balance sheet of Aimco OP L.P. (a Maryland corporation) and subsidiaries (the “Partnership”) as of December 31, 2024, the related consolidated statements of operations, partners’ capital, and cash flows for the year ended December 31, 2024, and the related notes and financial statement schedule included under Item 15(a) (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Partnership as of December 31, 2024, and the results of its operations and its cash flows for the year ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Partnership’s internal control over financial reporting as of December 31, 2024, based on criteria established in the 2013 Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”), and our report dated February 24, 2025 expressed an unqualified opinion.