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Debt of the Operating Partnership (Floating and Base Rate Borrowing) (Details) - Digital Realty Trust, L.P. $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) $ / € $ / ¥ $ / £ $ / $ $ / $ $ / $ | Dec. 31, 2017 USD ($) $ / € $ / ¥ $ / £ $ / $ $ / $
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 9,213,029 |
Global revolving credit facility |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 958,480 | $ 558,191
Weighted-average interest rate | 2.52% | 2.21%
Interest rate basis spread | 1.00% |
Global revolving credit facility | Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 943,480 | $ 543,191
Weighted-average interest rate | 2.48% | 2.15%
Interest rate basis spread | 1.00% |
U.S. dollar ($) | Global revolving credit facility | Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 745,000 | $ 400,000
Weighted-average interest rate | 2.78% | 2.48%
U.S. dollar ($) | Global revolving credit facility | Base Rate [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 15,000 | $ 15,000
Weighted-average interest rate | 4.75% | 4.50%
British pound sterling (£) | Global revolving credit facility |  |
Debt Instrument [Line Items] |  |
Exchange rate | $ / £ | 1.40 | 1.35
British pound sterling (£) | Global revolving credit facility | Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 14,015 | $ 18,918
Weighted-average interest rate | 1.51% | 1.50%
Euro (€) | Global revolving credit facility |  |
Debt Instrument [Line Items] |  |
Exchange rate | $ / € | 1.23 | 1.20
Euro (€) | Global revolving credit facility | Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 38,204 | $ 31,213
Weighted-average interest rate | 0.62% | 0.62%
Australian dollar (AUD) | Global revolving credit facility |  |
Debt Instrument [Line Items] |  |
Exchange rate | $ / $ | 0.77 |
Australian dollar (AUD) | Global revolving credit facility | Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 11,672 | $ 0
Weighted-average interest rate | 2.77% | 0.00%
Hong Kong dollar (HKD) | Global revolving credit facility |  |
Debt Instrument [Line Items] |  |
Exchange rate | $ / $ | 0.13 | 0.13
Hong Kong dollar (HKD) | Global revolving credit facility | Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 4,829 | $ 4,100
Weighted-average interest rate | 1.84% | 2.20%
Japanese yen (JPY) | Global revolving credit facility |  |
Debt Instrument [Line Items] |  |
Exchange rate | $ / ¥ | 0.01 | 0.01
Japanese yen (JPY) | Global revolving credit facility | Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 90,985 | $ 65,890
Weighted-average interest rate | 0.92% | 0.96%
Canadian dollar (CAD) | Global revolving credit facility |  |
Debt Instrument [Line Items] |  |
Exchange rate | $ / $ | 0.78 | 0.80
Canadian dollar (CAD) | Global revolving credit facility | Floating Rate |  |
Debt Instrument [Line Items] |  |
Long-term debt, gross | $ 38,775 | $ 23,070
Weighted-average interest rate | 2.60% | 2.36%

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