Financial Instruments and Derivatives - Additional Information (Details) - USD ($)		9 Months Ended
		Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Preferred Stock, Redemption Price Per Share	[1]	$ 50.00
Preferred Stock, Redemption Date		Oct. 01, 2026
Variable Rate Commercial Paper Program [Member]
Derivative [Line Items]
Variable Rate Commercial Paper Program		$ 125,000,000.0
Variable Rate Commercial Paper Program		$ 125,000,000.0
Designated as Hedging Instrument
Derivative [Line Items]
Derivative Instrument, Loss Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Expense
Realized losses associated with terminated interest rate swaps that were designated as cash flow hedging instruments		$ 10,500,000
Designated as Hedging Instrument | Interest Expense
Derivative [Line Items]
Change in fair value of interest rate derivatives included in AOCI and expected to be reclassified in the next 12 months		1,100,000
Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset		24,100,000	$ 34,500,000
Fixed Rate Debt [Member]
Derivative [Line Items]
Notes Payable Excluding Interest Rate Swaps and Cap Agreements		4,400,000,000	4,500,000,000
Notes Payable, Fair Value Disclosure		$ 3,900,000,000	4,800,000,000
Floating Rate Debt [Member]
Derivative [Line Items]
Notes Payable Excluding Interest Rate Swaps and Cap Agreements			$ 0

[1] The redemption price is the price at which the preferred stock is redeemable, at MAA’s option, for cash.