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 ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule Of Earnings Per Share And Per Unit [Line Items]
Net (loss) income attributable to AIR common stockholders	$ (1,439)	$ 196,722	$ (12,896)	$ 572,603
Net (loss) income attributable to AIR common stockholders	$ (1,439)	$ 196,722	$ (12,896)	$ 572,603
Denominator:
Basic weighted-average common shares/units equivalents outstanding (in shares)	148,832	155,927	148,821	156,327
Dilutive common share/unit equivalents outstanding (in shares)	0	209	0	280
Dilutive weighted-average common shares/units outstanding (in shares)	148,832	156,136	148,821	156,607
Earnings per share/unit - basic (in dollars per share)	$ (0.01)	$ 1.26	$ (0.09)	$ 3.66
Earnings per share/unit - diluted (in dollars per share)	$ (0.01)	$ 1.26	$ (0.09)	$ 3.66
Apartment Income REIT, L.P.
Schedule Of Earnings Per Share And Per Unit [Line Items]
Net (loss) income attributable to AIR common stockholders	$ (1,754)	$ 209,471	$ (14,037)	$ 609,519
Net (loss) income attributable to AIR common stockholders	$ (1,754)	$ 209,471	$ (14,037)	$ 609,519
Denominator:
Basic weighted-average common shares/units equivalents outstanding (in shares)	159,778	166,023	159,531	166,434
Dilutive common share/unit equivalents outstanding (in shares)	0	209	0	280
Dilutive weighted-average common shares/units outstanding (in shares)	159,778	166,232	159,531	166,714
Earnings per share/unit - basic (in dollars per share)	$ (0.01)	$ 1.26	$ (0.09)	$ 3.66
Earnings per share/unit - diluted (in dollars per share)	$ (0.01)	$ 1.26	$ (0.09)	$ 3.66