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Debt of the Operating Partnership (Global Revolving Credit Facility) (Narrative) (Details) - Global revolving credit facility, net |  | 9 Months Ended |
--- | --- | --- | ---
Jan. 15, 2016 USD ($) extension | Sep. 30, 2018 USD ($) | Aug. 15, 2013 USD ($)
Debt Instrument [Line Items] |  |  |
Credit facility, maximum borrowing capacity | $ 2,000,000,000.0 |  |
Digital Realty Trust, L.P. |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility, maximum borrowing capacity | $ 2,000,000,000.0 |  | $ 2,000,000,000.0
Number of extension options | extension | 2 |  |
Revolving credit facility commitments extension | 6 months |  |
Interest rate basis spread |  | 1.00% |
Commitment fee percentage |  | 0.20% |
Letter of credit security amount |  | $ 44,600,000 |
Digital Realty Trust, L.P. | Accordian Feature |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility, maximum borrowing capacity | $ 2,500,000,000 |  |

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- Definition Number of extension options + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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