Capital And Accumulated Other Comprehensive Income (Schedule Of Dividends/Distributions) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Series E Preferred Units
Dividends Payable [Line Items]
Preferred stock dividend per share amount	$ 1.75
Series F Preferred Units
Dividends Payable [Line Items]
Preferred stock dividend per share amount	$ 1.65625
Series G Preferred Units
Dividends Payable [Line Items]
Preferred stock dividend per share amount	$ 1.46875
Series H Preferred Units
Dividends Payable [Line Items]
Preferred stock dividend per share amount	$ 1.84375
Installment 1 FY2015
Dividends Payable [Line Items]
Date dividend/distribution declared	Feb. 25, 2015
Dividend/Distribution payment date	Mar. 31, 2015
Installment 1 FY2015 | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Date dividend/distribution declared	Feb. 25, 2015
Dividend/Distribution payment date	Mar. 31, 2015
Installment 1 FY2015 | Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 5,031,000
Installment 1 FY2015 | Series E Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	5,031,000
Installment 1 FY2015 | Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023,000
Installment 1 FY2015 | Series F Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023,000
Installment 1 FY2015 | Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672,000
Installment 1 FY2015 | Series G Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672,000
Installment 1 FY2015 | Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730,000
Installment 1 FY2015 | Series H Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730,000
Installment 1 FY2015 | Common Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	117,896,000
Installment3 Fy2014 | Series E Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	1.750
Installment3 Fy2014 | Series F Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	1.656
Installment3 Fy2014 | Series G Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	1.469
Installment3 Fy2014 | Series H Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	1.844
Installment3 Fy2014 | Common Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	$ 3.400