Share-Based Compensation (Schedule of Share-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	$ 10,535	$ 9,457	$ 35,213	$ 30,361
Income Statement Location [Axis]: us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	555	2,902	6,654	8,998
Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	9,648	5,975	27,152	18,997
Income Statement Location [Axis]: us-gaap:OtherCostOfOperatingRevenue
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	90	318	821	991
Income Statement Location [Axis]: psa:RealEstateAcquisitionAndDevelopmentExpense
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	$ 242	$ 262	$ 586	$ 1,375