Debt Of The Operating Partnership (Summary Of Outstanding Indebtedness Of The Operating Partnership - Global Revolving Credit Facility) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Maturity Date	Nov. 03, 2017	[1]
Revolving credit facilities interest rates	Various	[1]
Balance/Principal Outstanding	$ 498,082	[2]	$ 723,729	[2]
Revolving credit facility basis spread on variable rate	1.10%
Basis rate for unused portion of the credit facility	0.20%
Weighted-average interest rate	1.66%		2.05%
USD [Member] | Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Balance/Principal Outstanding	277,000		49,000
Weighted-average interest rate	1.36%		2.05%
GBP [Member]
Debt of the Operating Partnership [Line Items]
Exchange rate	1.62		1.63
GBP [Member] | Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Balance/Principal Outstanding	32,372	[3]	433,195	[4]
Weighted-average interest rate	1.60%		1.75%
EUR [Member]
Debt of the Operating Partnership [Line Items]
Exchange rate	1.35		1.32
EUR [Member] | Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Balance/Principal Outstanding	63,577	[3]	87,074	[4]
Weighted-average interest rate	1.23%		1.36%
SGD [Member]
Debt of the Operating Partnership [Line Items]
Exchange rate	0.80		0.82
SGD [Member] | Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Balance/Principal Outstanding			26,191	[4]
Weighted-average interest rate			1.56%
AUD [Member]
Debt of the Operating Partnership [Line Items]
Exchange rate	0.93		1.04
AUD [Member] | Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Balance/Principal Outstanding	62,866	[3]	93,754	[4]
Weighted-average interest rate	3.66%		4.42%
HKD [Member]
Debt of the Operating Partnership [Line Items]
Exchange rate	0.13		0.13
HKD [Member] | Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Balance/Principal Outstanding	40,034	[3]	34,515	[4]
Weighted-average interest rate	1.31%		1.53%
JPY [Member]
Debt of the Operating Partnership [Line Items]
Balance/Principal Outstanding	12,048	[3]
Weighted-average interest rate	1.22%
Exchange rate	0.01
JPY [Member] | Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Weighted-average interest rate	1.22%
CAD [Member]
Debt of the Operating Partnership [Line Items]
Exchange rate	0.97
CAD [Member] | Global Revolving Credit Facility [Member] | Digital Realty Trust, L.P. [Member]
Debt of the Operating Partnership [Line Items]
Balance/Principal Outstanding	$ 10,185	[3]
Weighted-average interest rate	2.32%

[1] The interest rate for borrowings under the global revolving credit facility equals the applicable index plus a margin of 110 basis points, which is based on the credit rating of our long-term debt. An annual facility fee of 20 basis points, which is based on the credit rating of our long-term debt, is due and payable quarterly on the total commitment amount of the facility. Two six-month extensions are available, which we may exercise if certain conditions are met.

[2] Balances as of September 30, 2013 and December 31, 2012 are as follows (balances, in thousands): Denomination of Draw Balance as of September 30, 2013 Weighted-average interest rate Balance as of December 31, 2012 Weighted-average interest rate U.S. dollar ($) $ 277,000 1.36% $ 49,000 2.05% British pound sterling (£) 32,372 1.60% 433,195 (b) 1.75% Euro (€) 63,577 (a) 1.23% 87,074 (b) 1.36% Singapore dollar (SGD) - - 26,191 (b) 1.56% Australian dollar (AUD) 62,866 (a) 3.66% 93,754 (b) 4.42% Hong Kong dollar (HKD) 40,034 (a) 1.31% 34,515 (b) 1.53% Japanese yen (JPY) 12,048 (a) 1.22% - - Canadian dollar (CAD) 10,185 (a) 2.32% - - Total $ 498,082 1.66% $ 723,729 2.05% (a) Based on exchange rates of $1.62 to €1.00, $1.35 to €1.00, $0.93 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY and $0.97 to 1.00 CAD as of September 30, 2013. (b) Based on exchange rates of $1.63 to £1.00, $1.32 to €1.00, $0.82 to 1.00 SGD, $1.04 to 1.00 AUD and $0.13 to 1.00 HKD as of December 31, 2012.

[3] Based on exchange rates of $1.62 to £1.00, $1.35 to €1.00, $0.93 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY and $0.97 to 1.00 CAD as of September 30, 2013.

[4] Based on exchange rates of $1.63 to £1.00, $1.32 to €1.00, $0.82 to 1.00 SGD, $1.04 to 1.00 AUD and $0.13 to 1.00 HKD as of December 31, 2012.