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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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