Capital And Accumulated Other Comprehensive Income (Loss) (6.625% Series F Cumulative Convertible Preferred Units Narrative) (Details) (Series F Cumulative Convertible Preferred Units [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 April 5, 2012 [Member]	Dec. 31, 2013 April 18, 2012 [Member]	Dec. 31, 2013 April 5, 2012 and April 18, 2012 [Member]	Dec. 31, 2013 Digital Realty Trust, L.P. [Member]	Dec. 31, 2012 Digital Realty Trust, L.P. [Member]	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] April 5, 2012 [Member]	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] April 18, 2012 [Member]	Dec. 31, 2013 Digital Realty Trust, L.P. [Member] April 5, 2012 and April 18, 2012 [Member]	Apr. 18, 2012 Digital Realty Trust, L.P. [Member] April 5, 2012 and April 18, 2012 [Member]
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issuance date			Apr. 05, 2012	Apr. 18, 2012				Apr. 05, 2012	Apr. 18, 2012
Preferred stock, issued	7,300,000	7,300,000			7,300,000						7,300,000
Preferred stock, dividend rate	6.625%	6.625%			6.625%	6.625%	6.625%			6.625%
Gross proceeds from issuance of redeemable preferred stock					$ 176.2
Preferred stock dividend per share amount	$ 1.656	$ 1.656			$ 1.65625	$ 1.656	$ 1.656			$ 1.65625
Preferred stock, liquidation preference per share/unit	$ 25	$ 25			$ 25.00	$ 25	$ 25			$ 25.00
Preferred stock, distribution payable date					Jun. 29, 2012					Jun. 29, 2012
Preferred stock, dividends in arrears					$ 0.395660					$ 0.39566
Preferred stock, redemption date					Apr. 05, 2017					Apr. 05, 2017
Preferred stock, redemption price per share					$ 25.00					$ 25.00
Shares issued upon conversion					0.6843