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Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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Borrowings - Additional Information (Details)	1 Months Ended					12 Months Ended
Borrowings - Additional Information (Details)	Jul. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Aug. 31, 2021 USD ($)	Jul. 31, 2021 USD ($)	Feb. 28, 2021 USD ($) ApartmentUnit	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage						3.40%
Fixed Rate Property Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date						Oct. 27, 2048
Commercial Paper Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Payment Terms						397
Debt Instrument, Face Amount						$ 20,000,000.0
Debt Instrument, Unused Borrowing Capacity, Amount						34,900,000
Minimum [Member] \| Commercial Paper Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						500,000,000.0
Maximum [Member] \| Commercial Paper Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 625,000,000.0
Secured Debt [Member] \| Fixed Rate Property Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date						Dec. 31, 2048
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate						$ 367,200,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage						3.40%
Unsecured Debt [Member] \| Other Non operating Income Expense [Member]
Debt Instrument [Line Items]
Prepayment Penalties And Write-offs Of Unamortized Costs							$ 13,400,000
Unsecured Debt [Member] \| Fixed Rate Debt Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date						May 14, 2029
Debt Instrument, Face Amount						$ 4,050,000,000	$ 4,175,000,000
Debt Instrument, Interest Rate, Effective Percentage						3.40%
Unsecured Debt [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 1,250,000,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000,000,000.0
Debt Instrument, Maturity Date	Oct. 01, 2026
Line of Credit Facility, Amount Outstanding						$ 0
Letters of Credit Outstanding, Amount						$ 4,300,000
Unsecured Debt [Member] \| Minimum [Member] \| Fixed Rate Debt Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Term						5 years
Unsecured Debt [Member] \| Maximum [Member] \| Fixed Rate Debt Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Term						30 years
Unsecured Debt [Member] \| Public Income Notes [Member] \| Fixed Rate Debt Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 4,100,000,000
Retirement of Senior Unsecured Notes		$ 125,000,000.0
Unsecured Debt [Member] \| Private Placement [Member]
Debt Instrument [Line Items]
Retirement of Senior Unsecured Notes		$ 149,300,000		$ 72,800,000
Unsecured Debt [Member] \| Maturing in 2026, Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			1.10%
Unsecured Debt [Member] \| Maturing in 2026, Senior Notes [Member] \| Fixed Rate Debt Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 300,000,000
Unsecured Debt [Member] \| Due in December 2022, Senior Notes [Member] \| Fixed Rate Debt Senior Notes [Member]
Debt Instrument [Line Items]
Retirement of Senior Unsecured Notes						$ 125,000,000.0
Unsecured Debt [Member] \| Maturing in 2051 Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 300,000,000
Debt Instrument, Interest Rate, Stated Percentage			2.875%
Debt Issuance Costs, Gross			$ 10,000,000.0
Proceeds from Debt, Net of Issuance Costs			$ 590,000,000.0
Property Mortgage [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Repayments of Secured Debt					$ 118,600,000
Number of Apartment Communities \| ApartmentUnit					8
SOFR [Member] \| Unsecured Debt [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.70%
SOFR [Member] \| Unsecured Debt [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.40%