Capital And Accumulated Other Comprehensive Income (Loss) (7.000% Series E Cumulative Convertible Preferred Units Narrative) (Details) (Series E 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, 2011	Sep. 15, 2011
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issuance date	Sep. 15, 2011
Preferred stock, issued	11,500,000	11,500,000		11,500,000
Preferred stock, dividend rate	7.00%	7.00%
Gross proceeds from issuance of redeemable preferred stock	$ 277.2
Preferred stock dividend per share amount	$ 1.750	$ 1.750	$ 1.750
Preferred stock, liquidation preference per share/unit	$ 25.00	$ 25
Preferred stock, distribution payable date	Dec. 30, 2011
Preferred stock, dividends in arrears	$ 0.515278
Preferred stock, redemption date	Sep. 15, 2016
Preferred stock, redemption price per share	$ 25.00
Shares issued upon conversion	0.8378
Digital Realty Trust, L.P. [Member]
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issuance date	Sep. 15, 2011
Preferred stock, issued				11,500,000
Preferred stock, dividend rate	7.00%	7.00%
Preferred stock dividend per share amount	$ 1.750	$ 1.750	$ 1.750
Preferred stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, distribution payable date	Dec. 30, 2011
Preferred stock, dividends in arrears	$ 0.515278
Preferred stock, redemption date	Sep. 15, 2016
Preferred stock, redemption price per share	$ 25.00