Segment Information (Summary Of Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenue	$ 1,088,131	$ 894,931	$ 3,093,621	$ 2,491,508
Depreciation and amortization	(220,772)	(188,552)	(661,608)	(508,139)
General and administrative	(29,501)	(31,682)	(81,401)	(78,996)
Interest and other income	12,736	3,356	26,394	9,321
Interest expense	(34,113)	(23,736)	(100,178)	(60,980)
Equity in earnings of unconsolidated real estate entities	8,180	32,860	100,129	81,382
Foreign currency exchange gain	100,170	40,906	237,270	73,584
Foreign currency exchange gain			236,698	73,584
Gain on sale of real estate	1,503	279	1,503	13,683
Gain on sale of equity investment in PS Business Parks, Inc.	2,128,860	0	2,128,860	0
Net income	2,778,152	491,628	3,951,340	1,337,620
Operating Segments
Segment Reporting Information [Line Items]
Net income	590,317	469,645	1,638,763	1,299,626
Segment Reconciling Items
Segment Reporting Information [Line Items]
General and administrative	(29,501)	(31,682)	(81,401)	(78,996)
Interest and other income	12,736	3,356	26,394	9,321
Interest expense	(34,113)	(23,736)	(100,178)	(60,980)
Equity in earnings of unconsolidated real estate entities	8,180	32,860	100,129	81,382
Foreign currency exchange gain	100,170	40,906	237,270	73,584
Gain on sale of real estate	1,503	279	1,503	13,683
Gain on sale of equity investment in PS Business Parks, Inc.	2,128,860	0	2,128,860	0
Self-Storage Operations Reportable Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,027,374	840,510	2,917,675	2,333,850
Cost of operations	(255,470)	(216,999)	(738,953)	(631,699)
Net operating income	771,904	623,511	2,178,722	1,702,151
Depreciation and amortization	(220,772)	(188,552)	(661,608)	(508,139)
Net income	551,132	434,959	1,517,114	1,194,012
Ancillary Operations | Operating Segments
Segment Reporting Information [Line Items]
Revenue	60,757	54,421	175,946	157,658
Net operating income	39,185	34,686	121,649	105,614
Cost of operations	$ (21,572)	$ (19,735)	$ (54,297)	$ (52,044)