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Income per Unit (Schedule of Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 20,668,019 | 12,412,703
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 1,967,430 | 0
Potentially dilutive Series F Cumulative Redeemable Preferred Stock |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 0 | 1,783,083
Series G Preferred Units |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 2,439,505 | 2,438,074
Potentially dilutive Series H Cumulative Redeemable Preferred Units |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 3,574,840 | 3,572,744
Potentially dilutive Series I Cumulative Redeemable Preferred Units |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 2,442,359 | 2,440,928
Digital Realty Trust, L.P. |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 12,372,732 | 10,234,829
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) | 1,967,430 | 0
Digital Realty Trust, L.P. | Potentially dilutive Series F Cumulative Redeemable Preferred Stock |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 0 | 1,783,083
Digital Realty Trust, L.P. | Series G Preferred Units |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive securities (units) | 2,439,505 | 2,438,074
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) | 3,574,840 | 3,572,744
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) | 2,442,359 | 2,440,928
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) | 1,948,598 | 0

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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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