| Cover Page | Dec. 23, 2020 |
| Cover Page [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 23, 2020 |
| Entity Registrant Name | APARTMENT INVESTMENT & MANAGEMENT CO |
| Entity Central Index Key | 0000922864 |
| Entity Emerging Growth Company | false |
| Entity File Number | 1-13232 |
| Entity Incorporation, State or Country Code | MD |
| Entity Tax Identification Number | 84-1259577 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Aimco Investment and Management CompanyClass A Common Stock |
| Trading Symbol | AIV |
| Security Exchange Name | NYSE |
| AMICO Properties LP [Member] | |
| Cover Page [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 23, 2020 |
| Entity Registrant Name | AIMCO PROPERTIES, L.P. |
| Entity Central Index Key | 0000926660 |
| Entity Emerging Growth Company | false |
| Entity File Number | 0-56223 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 85-2460835 |
| 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 |
