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Income per Unit (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
Income per Unit (Narrative) (Details) (USD $)	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Strike price	$ 30.99	$ 31.84	$ 30.99	$ 31.84
Shares of common stock contingently issuable	758,916	1,920,061	722,782	1,781,415
Digital Realty Trust, L.P. [Member]
Strike price	$ 30.99	$ 31.84	$ 30.99	$ 31.84
Shares of common stock contingently issuable	758,916	1,920,061	722,782	1,781,415

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

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