Earnings and Dividends per Share and per Unit - Reconciliations of Numerator and Denominator in Calculations of Basic and Diluted Earnings (Loss) per Share and per Unit (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Schedule Of Earnings Per Share And Per Unit [Line Items]
Basic net income attributable to AIR common stockholders	$ 1,760,000	$ 9,289,000	$ 574,363,000	$ 74,455,000
Effect of dilutive instruments			4,807,000
Dilutive net income attributable to AIR common stockholders	$ 1,760,000	$ 9,289,000	$ 579,170,000	$ 74,455,000
Denominator:
Basic weighted-average common shares outstanding	153,811	156,646	155,488	153,289
Dilutive common share equivalents outstanding	246	396	1,952	361
Dilutive weighted-average common shares outstanding	154,057	157,042	157,440	153,650
Earnings per share - basic	$ 0.01	$ 0.06	$ 3.69	$ 0.49
Earnings per share - diluted	$ 0.01	$ 0.06	$ 3.68	$ 0.48
AIMCO Properties, LP [Member]
Schedule Of Earnings Per Share And Per Unit [Line Items]
Basic net income attributable to AIR common stockholders	$ 1,897	$ 9,764	$ 611,416	$ 78,421
Effect of dilutive instruments			4,935,000
Dilutive net income attributable to AIR common stockholders	$ 1,897	$ 9,764	$ 616,351	$ 78,421
Denominator:
Earnings per share - basic	$ 0.01	$ 0.06	$ 3.69	$ 0.49
Earnings per share - diluted	$ 0.01	$ 0.06	$ 3.68	$ 0.48
Apartment Income REIT, L.P [Member]
Schedule Of Earnings Per Share And Per Unit [Line Items]
Basic net income attributable to AIR common stockholders	$ 1,897,000	$ 9,764,000	$ 611,416,000	$ 78,421,000
Denominator:
Basic weighted-average common shares outstanding	163,866	164,603	165,578	161,336
Basic weighted-average common units outstanding	163,866	164,603	165,578	161,336
Dilutive common unit equivalents outstanding	246	396	1,951	361
Dilutive weighted-average common shares outstanding	164,112	164,999	167,529	161,697
Weighted Average Limited Partnership Units Outstanding, Diluted	164,112	164,999	167,529	161,697
Earnings per share - basic	$ 0.01	$ 0.06	$ 3.69	$ 0.49
Earnings per share - diluted	$ 0.01	$ 0.06	$ 3.68	$ 0.48
Basic weighted-average common units outstanding	163,866	164,603	165,578	161,336
Dilutive common unit equivalents outstanding	246	396	1,951	361
Dilutive weighted-average common units outstanding	164,112	164,999	167,529	161,697