Capital And Accumulated Other Comprehensive Income (Loss) (5.500% Series D Cumulative Convertible Preferred Units Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended
	Feb. 26, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 06, 2008
Series D Cumulative Convertible Preferred Units [Member]
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issuance date		Feb. 06, 2008
Preferred stock, issued		0	4,936,505		13,800,000
Preferred stock, dividend rate		5.50%	5.50%
Preferred stock dividend per share amount		$ 1.375	$ 1.375	$ 1.375
Preferred stock, liquidation preference per share/unit		$ 25	$ 25
Conversion of preferred stock (shares)	4,802,180
Conversion of units		4,936,505	2,040,550
Shares issued upon conversion, adjusted	0.6360
Shares issued upon conversion		0.6360
Series D Cumulative Convertible Preferred Units [Member] | Digital Realty Trust, L.P. [Member]
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issuance date		Feb. 06, 2008
Preferred stock, issued					13,800,000
Preferred stock, dividend rate		5.50%	5.50%
Preferred stock dividend per share amount		$ 1.375	$ 1.375	$ 1.375
Preferred stock, liquidation preference per share/unit		$ 25	$ 25
Conversion of preferred stock (shares)	4,802,180
Conversion of units		4,936,505	2,040,550
Shares issued upon conversion	0.6360	0.6360	1,297,675
Common Units [Member] | Digital Realty Trust, L.P. [Member]
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued upon conversion	3,054,186	3,139,615	1,297,675