Capital And Accumulated Other Comprehensive Income (Loss) (7.375% Series H Cumulative Redeemable Preferred Units Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued upon conversion	0.9632
Series H Cumulative Convertible Preferred Stock/Units [Member]
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issuance date	Mar. 26, 2014
Preferred stock, issued	12,000,000	0
Preferred stock, dividend rate	7.375%	7.375%
Preferred stock dividend per share amount	$ 1.84375
Preferred stock, liquidation preference per share/unit	$ 25.00	$ 25.00
Preferred stock dividend declared per share	$ 0.48655
Preferred stock, redemption price per share	$ 25.00
Digital Realty Trust, L.P. [Member] | Series H Cumulative Convertible Preferred Stock/Units [Member]
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issuance date	Mar. 26, 2014
Preferred stock, issued	14,600,000
Preferred stock, dividend rate	7.375%	7.375%
Preferred stock dividend per share amount	$ 1.84375
Preferred stock, liquidation preference per share/unit	$ 25.00	$ 25.00
Preferred stock dividend declared per share	$ 0.48655
Preferred stock, redemption price per share	$ 25.00