Real Estate Acquisitions and Dispositions - Pro Forma (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Business Acquisition [Line Items]
Total Revenues	$ 863.5	$ 814.3	$ 1,514.7	$ 1,362.8
Net income	$ 89.8	$ 74.0	$ 59.7	$ 74.7
Total revenues					$ 3,091.3
Net income attributable to SUI common shareholders					$ 241.2
Net income per share attributable to SUI common stockholders - basic (in dollars per share)					$ 1.99
Net income per share attributable to SUI common stockholders - diluted (in dollars per share)					$ 1.99
Park Holidays, Park Leisure, Jarrett Bay, and Montauk Yacht Club
Business Acquisition [Line Items]
Total Revenues					$ 353.6
Net income					$ 13.8