Equity And Accumulated Other Comprehensive Income, Net (Equity Distribution Agreements) (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2011
2011 Equity Distribution Agreements
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Aggregate offering price of the distribution agreement maximum			$ 400,000,000
Net proceeds from sale of common stock	$ 342,700,000
Issuance of common shares (shares)	5.7
Equity distribution agreements at an average price ($ per share)	$ 60.35
Payment of commissions to sales agents	$ 3,500,000
Aggregate offering price remaining available for offer and sale	53,800,000
Digital Realty Trust, L.P.
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Redemption value of OP units	$ 182,800,000	$ 179,000,000