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MAA Equity - Summary of Changes in Total Equity and its Components (Parenthetical) (Details) - $ / shares | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Mid America Apartment Communities Inc Shareholders Equity |  |  |  |
Equity [Line Items] |  |  |  |
Common Stock, Dividends, Per Share, Declared | $ 1.00 | $ 0.96 | $ 3.00 | $ 2.88

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- Definition Equity [Line Items] + References No definition available. + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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- Details
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