Significant Transactions During the Three Months Ended March 31, 2023 and Subsequent Events (Details) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2023 USD ($) apartment	Mar. 31, 2023 USD ($) $ / shares shares
Other Commitments [Line Items]
Treasury stock acquired, average cost per share (in dollars per share) | $ / shares		$ 218.88
Stock Repurchase Plan
Other Commitments [Line Items]
Shares repurchased and retired during period (in shares) | shares		437,026
Shares repurchased and retired during period, value		$ 95.7
Purchase authority remaining under stock repurchase plan	$ 302.7	302.7
Stock repurchase plan amount	$ 500.0	$ 500.0
CBC and The Sweeps
Other Commitments [Line Items]
Number of units acquired | apartment	239
Payments to acquire real estate	$ 91.7
Gain on sale of properties	$ 54.5