Debt Of The Operating Partnership (Summary Of Outstanding Indebtedness Of The Operating Partnership - Other Secured Loan) (Details) (USD $)				6 Months Ended				3 Months Ended	6 Months Ended
	Dec. 31, 2011	Jun. 30, 2012 Digital Realty Trust, L.P. [Member]	Dec. 31, 2011 Digital Realty Trust, L.P. [Member]	Jun. 30, 2012 Other Secured Loans [Member] 800 Central Expressway Mezzanine [Member] Digital Realty Trust, L.P. [Member]		Dec. 31, 2011 Other Secured Loans [Member] 800 Central Expressway Mezzanine [Member] Digital Realty Trust, L.P. [Member]		Jun. 30, 2012 Mortgage Loans And Other Secured Debt [Member] 800 Central Expressway And 800 Central Expressway Mezzanine [Member] Digital Realty Trust, L.P. [Member]	Jun. 30, 2012 Mortgage Loans And Other Secured Debt [Member] 800 Central Expressway And 800 Central Expressway Mezzanine [Member] Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Variable Rate Basis				1-month LIBOR + 8.50%	[1]
Basis spread on variable rate				8.50%
Maturity Date				Jun. 09, 2013	[1],[2]
Other secured loan	$ 10,500,000		$ 10,500,000			$ 10,500,000	[1]
Total indebtedness		3,400,212,000	2,940,210,000
Debt instrument, date paid in full				May 2012
Net loss from early extinguishment of debt								$ (300,000)	$ (300,000)

[1] The respective borrower's assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

[2] These loans were repaid in full: 114 Rue Ambroise Croizat (January 2012), Unit 9, Blanchardstown Corporate Park (January 2012), 1201 Comstock Street (April 2012), 800 Central Expressway (May 2012) and 800 Central Expressway Mezzanine (May 2012). Net loss from early extinguishment of debt related to write-off of unamortized deferred loan costs on 1201 Comstock Street, 800 Central Expressway and 800 Central Expressway Mezzanine amounted to $0.3 million for both the three and six months ended June 30, 2012.