Debt Of The Operating Partnership (Summary Of Outstanding Indebtedness Of The Operating Partnership - Mortgage Loans) (Details)					12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended		12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended					12 Months Ended				12 Months Ended				12 Months Ended						12 Months Ended		12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] USD ($)	Dec. 31, 2012 Digital Realty Trust, L.P. [Member] USD ($)	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] USD ($)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] USD ($)	Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] USD ($)	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Secured Term Debt [Member] USD ($) item property		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Secured Term Debt [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 200 Paul Avenue [Member] USD ($)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 200 Paul Avenue [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Mundells Roundabout [Member]		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Mundells Roundabout [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 2045 & 2055 LaFayette Street [Member] USD ($)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 2045 & 2055 LaFayette Street [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 34551 Ardenwood Boulevard 1-4 [Member] USD ($)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 34551 Ardenwood Boulevard 1-4 [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 1100 Space Park Drive [Member] USD ($)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 1100 Space Park Drive [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 600 West Seventh Street [Member] USD ($)	Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 600 West Seventh Street [Member] USD ($)	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 150 South First Street [Member] USD ($)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 150 South First Street [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 360 Spear Street [Member]		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 360 Spear Street [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Clonshaugh Industrial Estate II [Member]		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Clonshaugh Industrial Estate II [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 2334 Lundy Place [Member] USD ($)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 2334 Lundy Place [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 1500 Space Park Drive [Member]		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 1500 Space Park Drive [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Cressex 1 [Member] USD ($)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Cressex 1 [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 636 Pierce Street [Member] USD ($)	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Paul van Vlissingenstraat 16 [Member]		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Paul van Vlissingenstraat 16 [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Chemin de l'Epinglier 2 [Member]		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Chemin de l'Epinglier 2 [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Gyroscoopweg 2E-2F [Member]		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Gyroscoopweg 2E-2F [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Manchester Technopark [Member] USD ($) property		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Manchester Technopark [Member] GBP (£)		Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] Manchester Technopark [Member] USD ($)		Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 8025 North Interstate 35 [Member] USD ($)	Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 8025 North Interstate 35 [Member] USD ($)	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 731 East Trade Street [Member] USD ($)	Dec. 31, 2012 Digital Realty Trust, L.P. [Member] Mortgage Loans [Member] 731 East Trade Street [Member] USD ($)	Dec. 31, 2012 GBP [Member] USD ($)	Dec. 31, 2012 EUR [Member] USD ($)
Debt Instrument [Line Items]
Interest rate at period end									5.65%	[1],[2]			5.74%	[1]							5.93%	[1]			5.95%	[1]			5.89%	[1]			5.80%		6.30%	[1]			6.32%	[1]							5.96%	[1]			6.15%	[1]			5.68%	[3]			5.27%													5.68%	[3]	5.68%	[3]			4.09%		8.22%
Variable Rate Basis																	3-month GBP LIBOR + 1.20%	[4]																									3-month EURIBOR + 4.50%	[5]																3-month EURIBOR + 1.60%	[4]			3-month EURIBOR + 1.50%	[4]			3-month EURIBOR + 1.50%	[4]
Basis spread on variable rate																	1.20%	[4]																									4.50%																	1.60%	[4]			1.50%	[4]			1.50%	[4]
Maturity Date									Nov. 11, 2014	[1],[2]			Oct. 08, 2015	[1]			Nov. 30, 2013				Feb. 06, 2017	[1]			Nov. 11, 2016	[1]			Dec. 11, 2016	[1]			Mar. 15, 2016		Feb. 06, 2017	[1]			Nov. 08, 2013	[1]			Sep. 04, 2014	[5]			Nov. 11, 2016	[1]			Oct. 05, 2013	[1]			Oct. 16, 2014	[3]			Apr. 15, 2023	Jul. 18, 2013				Jul. 18, 2013				Oct. 18, 2013				Oct. 16, 2014	[3]	Oct. 16, 2014	[3]			Mar. 06, 2016		Jul. 01, 2020
Unamortized net premium	$ 1,640,000		$ 2,359,000		$ 2,359,000	[6]		$ 1,542,000
Mortgage loans, net of premiums	585,608,000	792,376,000	585,608,000	792,376,000	585,608,000			792,376,000	132,966,000	[1],[2]	135,991,000	[1],[2]	70,713,000	[1]	72,646,000	[1]			69,612,000	[7]	63,623,000	[1]	64,621,000	[1]	52,152,000	[1]	52,916,000	[1]	52,115,000	[1]	52,889,000	[1]	49,548,000	51,174,000	50,097,000	[1]	50,830,000	[1]			46,613,000	[1]			39,579,000	[5],[8]	37,930,000	[1]	38,486,000	[1]			35,682,000	[1]	28,583,000	[3]	28,560,000	[3],[7]	26,327,000			13,336,000	[8]			9,649,000	[8]			8,492,000	[8]	8,695,000	[3],[7]			8,688,000	[3],[7]	6,314,000	6,561,000	4,186,000	4,509,000
Mortgage loans on real estate, number									6
Number of properties									6																																																															2		2
Exchange rate					1.66		1.32	1.63																																																																										1.63	1.32
Letter of credit security amount																																																																										7,800,000
Net loss from early extinguishment of debt					1,800,000
Total indebtedness			$ 4,961,892,000	$ 4,278,565,000	$ 585,608,000	[6]

[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] This amount represents six mortgage loans secured by our interests in 36 NE 2nd Street, 3300 East Birch Street, 100 & 200 Quannapowitt Parkway, 300 Boulevard East, 4849 Alpha Road, and 11830 Webb Chapel Road. Each of these loans is cross-collateralized by the six properties.

[3] These loans are also secured by a £7.8 million letter of credit. These loans are cross-collateralized by the two properties.

[4] We have entered into interest rate swap agreements as a cash flow hedge for interest generated by these US LIBOR, EURIBOR and GBP LIBOR based loans as well as the U.S. Dollar and Singapore Dollar tranches of the unsecured term loan. See note 14 for further information.

[5] The Operating Partnership or its subsidiary provides a limited recourse guarantee with respect to this loan.

[6] Our mortgage loans are generally non-recourse to us, subject to carve-outs for specified actions by us or specified undisclosed environmental liabilities. As of December 31, 2013, we provided partial letter of credit support with respect to approximately $37.3 million of the outstanding mortgage indebtedness (based on exchange rates as of December 31, 2013).

[7] Based on exchange rate of $1.66 to £1.00 as of December 31, 2013 and $1.63 to £1.00 as of December 31, 2012.

[8] Based on exchange rate of $1.37 to €1.00 as of December 31, 2013 and $1.32 to €1.00 as of December 31, 2012.