Debt of the Operating Partnership (Global Revolving Credit Facility) (Narrative) (Details) (Digital Realty Trust, L.P., USD $)	3 Months Ended
	Mar. 31, 2015 extension		Dec. 31, 2014		Aug. 15, 2013	Aug. 14, 2013
Unsecured term loan
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity					$ 1,000,000,000.0	$ 750,000,000.0
Maturity Date	Apr. 16, 2017
Number of extension options	2
Revolving credit facility commitments extension	6 months
Interest rate basis spread	1.20%
Balance as of March 31, 2015	942,006,000	[1]	976,600,000	[1]
Global revolving credit facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity					2,000,000,000	1,800,000,000
Maturity Date	Nov. 03, 2017
Number of extension options	2
Revolving credit facility commitments extension	6 months
Base rate percentage	3.35%
Capitalized financing costs related to global revolving facilities	18,000,000
Balance as of March 31, 2015	826,906,000	[2],[3]	525,951,000	[2],[3]
Letter of credit security amount	8,100,000
Global revolving credit facility | Prime Rate
Debt Instrument [Line Items]
Interest rate basis spread	0.10%
Accordian Feature | Unsecured term loan
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity					1,100,000,000.0
Accordian Feature | Global revolving credit facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity					$ 2,550,000,000

[1] Balances as of March 31, 2015 and December 31, 2014 are as follows (balances, in thousands):Denomination of DrawBalance as of March 31, 2015 Weighted-averageinterest rate Balance as of December 31, 2014 Weighted-averageinterest rate U.S. dollar ($)$410,9051.38%(b)$410,9051.36%(d)Singapore dollar (SGD)166,485(a)1.75%(b)172,426(c)1.45%(d)British pound sterling (£)179,187(a)1.76%188,365(c)1.76%Euro (€)106,773(a)1.19%120,375(c)1.22%Australian dollar (AUD)78,656(a)3.50%84,529(c)3.98%Total$942,006 1.67%(b)$976,6001.66%(d)(a)Based on exchange rates of $0.73 to 1.00 SGD, $1.48 to £1.00, $1.07 to €1.00 and $0.76 to 1.00 AUD, respectively, as of March 31, 2015.(b)As of March 31, 2015, the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.10% (Singapore dollar) and 1.97% (Total). See Note 14 for further discussion on interest rate swaps.(c)Based on exchange rates of $0.75 to 1.00 SGD, $1.56 to £1.00, $1.21 to €1.00 and $0.82 to 1.00 AUD, respectively, as of December 31, 2014.(d)As of December 31, 2014, the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.01% (Singapore dollar) and 2.00% (Total). See Note 14 for further discussion on interest rate swaps.

[2] The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt.

[3] Balances as of March 31, 2015 and December 31, 2014 are as follows (balances, in thousands):Denomination of DrawBalance as of March 31, 2015 Weighted-averageinterest rateBalance as of December 31, 2014 Weighted-averageinterest rateFloating Rate Borrowing (a)U.S. dollar ($)$317,0001.28%$90,0001.27%British pound sterling (£)125,360(c)1.62% 132,7161.61%Euro (€)140,791(c)1.05%58,071(d)1.13%Australian dollar (AUD)70,061(c)3.35%72,676(d)3.74%Hong Kong dollar (HKD)87,417(c)1.34%79,336(d)1.34%Japanese yen (JPY)13,235(c)1.17%13,201(d)1.17%Singapore dollar (SGD)4,153(c)1.86% 6,565(d)1.64%Canadian dollar (CAD)61,889(c)2.10%62,386(d)2.39%Total$819,906 1.54%$514,951 1.84%Base Rate Borrowing (b) U.S. dollar ($)$7,000 3.35%$11,000 3.35%Total borrowings$826,906 1.55%$525,951 1.87%(a)The interest rates for floating rate borrowings under the global revolving credit facility equal the applicable index plus a margin of 110 basis points, which is based on the credit ratings of our long-term debt.(b)The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt.(c)Based on exchange rates of $1.48 to £1.00, $1.07 to €1.00, $0.76 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.73 to 1.00 SGD and $0.79 to 1.00 CAD, respectively, as of March 31, 2015.(d)Based on exchange rates of $1.21 to €1.00, $0.82 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.75 to 1.00 SGD and $0.86 to 1.00 CAD, respectively, as of December 31, 2014.