Financial Instruments and Derivatives - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
		Mar. 31, 2025	Dec. 31, 2024
Derivative [Line Items]
Preferred Stock, Redemption Price Per Share	[1]	$ 50
Preferred Stock, Redemption Date		Oct. 01, 2026
Variable Rate Commercial Paper Program [Member]
Derivative [Line Items]
Debt instruments Carrying Value		$ 310.0	$ 250.0
Variable Rate Commercial Paper Program		$ 310.0	250.0
Variable Rate Commercial Paper Program [Member] | Maximum [Member]
Derivative [Line Items]
Debt Renewal Period		30 days
Designated as Hedging Instrument
Derivative [Line Items]
Realized losses associated with terminated interest rate swaps that were designated as cash flow hedging instruments		$ 6.6
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		1.6
Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset		12.7	13.2
Fixed Rate Debt [Member]
Derivative [Line Items]
Notes Payable Excluding Interest Rate Swaps and Cap Agreements		4,700.0	4,700.0
Notes Payable, Fair Value Disclosure		$ 4,400.0	$ 4,400.0

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