Subsequent Events Subsequent Events	12 Months Ended
Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On January 16, 2019, Digital Euro Finco, LLC, a wholly owned indirect finance subsidiary of the Operating Partnership, issued and sold €850 million aggregate principal amount of 2.500% Guaranteed Notes due 2026 denominated in Euros (the “Euro Notes”). The Euro Notes are senior unsecured obligations of Digital Euro Finco, LLC and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. and the operating partnership. The terms of the Euro Notes are governed by an indenture, dated as of January 16, 2019, among Digital Euro Finco, LLC, Digital Realty Trust, Inc., the operating partnership, Deutsche Trustee Company Limited, as trustee, Deutsche Bank AG, London Branch, as paying agent and a transfer agent, and Deutsche Bank Luxembourg S.A., as registrar and a transfer agent (the “Indenture”). The Indenture contains various restrictive covenants, including limitations on our ability to incur additional indebtedness and requirements to maintain a pool of unencumbered assets. Net proceeds from the offering were approximately €843.5 million after deducting managers’ discounts and estimated offering expenses. We intend to allocate an amount equal to the net proceeds from the offering of the Euro Notes to finance or refinance, in whole or in part, certain green building, energy and resource efficiency and renewable energy projects (collectively, “Eligible Green Projects”), including the development and redevelopment of such projects. Pending the allocation of an amount equal to the net proceeds of the Euro Notes to Eligible Green Projects, all or a portion of an amount equal to the net proceeds may be used for the payment of outstanding indebtedness or other capital management activities. Such indebtedness to be redeemed or repaid is expected to include the operating partnership’s 5.875% Senior Notes due 2020 pursuant to a previously announced tender offer for such notes, by redemption or otherwise, and may include borrowings under the operating partnership’s global credit facilities, as well as other outstanding debt securities. On January 17, 2019, we announced the results of the previously announced cash tender offer, which we refer to as the Tender Offer, by the operating partnership for any and all of the outstanding $500.0 million in aggregate principal amount of 5.875% Senior Notes due 2020 (the “Senior Notes”), which are fully and unconditionally guaranteed by Digital Realty Trust, Inc.. The Tender Offer expired at 5:00 p.m., New York City time, on Thursday, January 17, 2019. As of the expiration of the Tender Offer, approximately $350.1 million or 70.02% of the $500.0 million aggregate principal amount of the Senior Notes outstanding prior to the Tender Offer had been validly tendered and not withdrawn in the Tender Offer. The operating partnership accepted for purchase all of the Notes validly tendered and delivered (and not validly withdrawn) in the Tender Offer at or prior to the Expiration Time. Payment for the Notes purchased pursuant to the Tender Offer is anticipated to be made on January 18, 2019 (the “Settlement Date”) or January 23, 2019 (the “Guaranteed Delivery Settlement Date”), as applicable. The consideration paid under the Tender Offer was $1,022.81 per $1,000 principal amount of Senior Notes, plus accrued and unpaid interest to, but not including, the Settlement Date. The total Tender Offer consideration of approximately $367.7 million including accrued and unpaid interest was funded from a portion of the net proceeds from the previously announced issuance and sale by Digital Euro Finco, LLC, a wholly owned indirect finance subsidiary of the Operating Partnership, of the Euro Notes. On January 18, 2019, Digital Realty announced that its operating partnership has elected to redeem all of its Senior Notes that remain outstanding following the Tender Offer on February 19, 2019 (the “Redemption Date”). The aggregate principal amount outstanding of Senior Notes following the settlement of the Tender Offer was approximately $149.9 million. The redemption price for the Senior Notes is equal to (a) $1,020.31 per $1,000 principal amount of the Senior Notes, or 102.031% of the aggregate principal amount of the Senior Notes, plus (b) accrued and unpaid interest to, but excluding, the Redemption Date equal to $2.937500 per $1,000 principal amount of the Senior Notes. The operating partnership used the net proceeds from the previously announced issuance and sale by Digital Euro Finco, LLC, a wholly owned indirect finance subsidiary of the Operating Partnership, of the Euro Notes. to fund this redemption. After this redemption, no Senior Notes were outstanding.

Subsequent Events

On January 16, 2019, Digital Euro Finco, LLC, a wholly owned indirect finance subsidiary of the Operating Partnership, issued and sold €850 million aggregate principal amount of 2.500% Guaranteed Notes due 2026 denominated in Euros (the “Euro Notes”). The Euro Notes are senior unsecured obligations of Digital Euro Finco, LLC and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. and the operating partnership. The terms of the Euro Notes are governed by an indenture, dated as of January 16, 2019, among Digital Euro Finco, LLC, Digital Realty Trust, Inc., the operating partnership, Deutsche Trustee Company Limited, as trustee, Deutsche Bank AG, London Branch, as paying agent and a transfer agent, and Deutsche Bank Luxembourg S.A., as registrar and a transfer agent (the “Indenture”). The Indenture contains various restrictive covenants, including limitations on our ability to incur additional indebtedness and requirements to maintain a pool of unencumbered assets. Net proceeds from the offering were approximately €843.5 million after deducting managers’ discounts and estimated offering expenses. We intend to allocate an amount equal to the net proceeds from the offering of the Euro Notes to finance or refinance, in whole or in part, certain green building, energy and resource efficiency and renewable energy projects (collectively, “Eligible Green Projects”), including the development and redevelopment of such projects. Pending the allocation of an amount equal to the net proceeds of the Euro Notes to Eligible Green Projects, all or a portion of an amount equal to the net proceeds may be used for the payment of outstanding indebtedness or other capital management activities. Such indebtedness to be redeemed or repaid is expected to include the operating partnership’s 5.875% Senior Notes due 2020 pursuant to a previously announced tender offer for such notes, by redemption or otherwise, and may include borrowings under the operating partnership’s global credit facilities, as well as other outstanding debt securities.

On January 17, 2019, we announced the results of the previously announced cash tender offer, which we refer to as the Tender Offer, by the operating partnership for any and all of the outstanding $500.0 million in aggregate principal amount of 5.875% Senior Notes due 2020 (the “Senior Notes”), which are fully and unconditionally guaranteed by Digital Realty Trust, Inc.. The Tender Offer expired at 5:00 p.m., New York City time, on Thursday, January 17, 2019. As of the expiration of the Tender Offer, approximately $350.1 million or 70.02% of the $500.0 million aggregate principal amount of the Senior Notes outstanding prior to the Tender Offer had been validly tendered and not withdrawn in the Tender Offer. The operating partnership accepted for purchase all of the Notes validly tendered and delivered (and not validly withdrawn) in the Tender Offer at or prior to the Expiration Time. Payment for the Notes purchased pursuant to the Tender Offer is anticipated to be made on January 18, 2019 (the “Settlement Date”) or January 23, 2019 (the “Guaranteed Delivery Settlement Date”), as applicable.

The consideration paid under the Tender Offer was $1,022.81 per $1,000 principal amount of Senior Notes, plus accrued and unpaid interest to, but not including, the Settlement Date. The total Tender Offer consideration of approximately $367.7 million including accrued and unpaid interest was funded from a portion of the net proceeds from the previously announced issuance and sale by Digital Euro Finco, LLC, a wholly owned indirect finance subsidiary of the Operating Partnership, of the Euro Notes.

On January 18, 2019, Digital Realty announced that its operating partnership has elected to redeem all of its Senior Notes that remain outstanding following the Tender Offer on February 19, 2019 (the “Redemption Date”). The aggregate principal amount outstanding of Senior Notes following the settlement of the Tender Offer was approximately $149.9 million. The redemption price for the Senior Notes is equal to (a) $1,020.31 per $1,000 principal amount of the Senior Notes, or 102.031% of the aggregate principal amount of the Senior Notes, plus (b) accrued and unpaid interest to, but excluding, the Redemption Date equal to $2.937500 per $1,000 principal amount of the Senior Notes. The operating partnership used the net proceeds from the previously announced issuance and sale by Digital Euro Finco, LLC, a wholly owned indirect finance subsidiary of the Operating Partnership, of the Euro Notes. to fund this redemption. After this redemption, no Senior Notes were outstanding.