Consolidated Statements Of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income	$ 1,330.3	$ 58.4	$ 1,288.7	$ 32.9
Foreign Currency Translation
Net foreign currency translation gain / (loss)	59.4	1.6	67.6	(7.6)
Cash Flow Hedges
Change in unrealized gain / (loss) on interest rate derivatives	0.2	2.6	(3.6)	11.4
Less: Interest rate derivative gain reclassified to earnings	(9.7)	(5.0)	(13.3)	(9.9)
Net unrealized gain / (loss) on interest rate derivatives	(9.5)	(2.4)	(16.9)	1.5
Total Comprehensive Income	1,380.2	57.6	1,339.4	26.8
Less: Comprehensive income attributable to noncontrolling interests	(52.6)	(3.0)	(50.2)	(1.9)
Comprehensive Income Attributable to SUI	$ 1,327.6	$ 54.6	$ 1,289.2	$ 24.9