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Debt of the Operating Partnership (Weighted-average Interest Rate by Denomination of Draw) (Details) - Digital Realty Trust, L.P. $ in Thousands	Mar. 31, 2018 USD ($) $ / $ $ / ¥ $ / £ $ / $ $ / $ $ / $	Dec. 31, 2017 USD ($) $ / $ $ / ¥ $ / £ $ / $ $ / $ $ / $
Debt Instrument [Line Items]
Long-term debt, gross	$ 9,213,029
Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,432,931	$ 1,425,117
Weighted-average interest rate	2.55%	2.42%
Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 6,715,440
Interest Rate Swap | Unsecured Term Loans
Debt Instrument [Line Items]
Weighted-average interest rate	2.41%	2.41%
U.S. dollar ($) | Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 606,911	$ 606,911
Weighted-average interest rate	3.08%	2.78%
U.S. dollar ($) | Interest Rate Swap | Unsecured Term Loans
Debt Instrument [Line Items]
Weighted-average interest rate	2.72%	2.72%
British pound sterling (£) | Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 237,519	$ 229,011
Weighted-average interest rate	1.60%	1.59%
Exchange rate | $ / £	1.40	1.35
British pound sterling (£) | Interest Rate Swap | Unsecured Term Loans
Debt Instrument [Line Items]
Weighted-average interest rate	1.89%	1.89%
Singapore dollar (SGD) | Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 238,129	$ 233,788
Weighted-average interest rate	2.21%	2.17%
Exchange rate | $ / $	0.76	0.75
Australian dollar (AUD) | Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 176,847	$ 179,841
Weighted-average interest rate	2.88%	2.79%
Exchange rate | $ / $	0.77	0.78
Hong Kong dollar (HKD) | Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 85,001	$ 85,762
Weighted-average interest rate	1.85%	2.20%
Exchange rate | $ / $	0.13	0.13
Canadian dollar (CAD) | Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 76,387	$ 78,357
Weighted-average interest rate	2.70%	2.44%
Exchange rate | $ / $	0.78	0.80
Canadian dollar (CAD) | Interest Rate Swap | Unsecured Term Loans
Debt Instrument [Line Items]
Weighted-average interest rate	1.88%	1.88%
Japanese yen (JPY) | Unsecured Term Loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 12,137	$ 11,447
Weighted-average interest rate	1.02%	1.05%
Exchange rate | $ / ¥	0.01	0.01

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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