Income Per Unit (Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	22,000,089	20,888,386	21,546,210
Digital Realty Trust, L.P. [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	19,478,689	16,744,673	16,898,581
Potentially Dilutive 2029 Debentures [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	6,649,510	6,486,358	6,328,234
Potentially Dilutive 2029 Debentures [Member] | Digital Realty Trust, L.P. [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	6,649,510	6,486,358	6,328,234
Series C Cumulative Convertible Preferred Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities		814,063	3,016,780
Series C Cumulative Convertible Preferred Units [Member] | Digital Realty Trust, L.P. [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities		814,063	3,016,780
Series D Cumulative Convertible Preferred Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	470,748	4,016,560	6,242,257
Series D Cumulative Convertible Preferred Units [Member] | Digital Realty Trust, L.P. [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	470,748	4,016,560	6,242,257
Series E Cumulative Convertible Preferred Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	5,176,886	4,122,752	1,311,310
Series E Cumulative Convertible Preferred Units [Member] | Digital Realty Trust, L.P. [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	5,176,886	4,122,752	1,311,310
Series F Cumulative Convertible Preferred Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	3,283,169	1,304,940
Series F Cumulative Convertible Preferred Units [Member] | Digital Realty Trust, L.P. [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	3,283,169	1,304,940
Series G Cumulative Convertible Preferred Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	3,898,376
Series G Cumulative Convertible Preferred Units [Member] | Digital Realty Trust, L.P. [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	3,898,376