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Income per Unit (Schedule of Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (units) | 19,036,184 | 12,245,217 | 19,993,742 | 11,487,387
Digital Realty Trust, L.P. |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (units) | 10,865,272 | 8,978,766 | 11,725,360 | 8,920,621
Digital Realty Trust, L.P. | Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (units) | 1,727,724 | 329,709 | 1,864,489 | 109,903
Digital Realty Trust, L.P. | Potentially dilutive Series F Cumulative Redeemable Preferred Units |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (units) | 0 | 0 | 0 | 617,734
Digital Realty Trust, L.P. | Potentially dilutive Series G Cumulative Redeemable Preferred Units |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (units) | 2,142,282 | 2,193,331 | 2,311,864 | 2,262,875
Digital Realty Trust, L.P. | Potentially dilutive Series H Cumulative Redeemable Preferred Units |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (units) | 3,139,291 | 3,214,098 | 3,387,795 | 3,316,008
Digital Realty Trust, L.P. | Potentially dilutive Series I Cumulative Redeemable Preferred Units |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (units) | 2,144,789 | 2,195,898 | 2,314,569 | 2,265,524
Digital Realty Trust, L.P. | Potentially dilutive Series J Cumulative Redeemable Preferred Units |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (units) | 1,711,186 | 1,045,730 | 1,846,643 | 348,577

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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