10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended September 30, 2015

¨ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the Transition Period From              to             .

Commission file number 001-32336 (Digital Realty Trust, Inc.)

000-54023 (Digital Realty Trust, L.P.)

DIGITAL REALTY TRUST, INC.

DIGITAL REALTY TRUST, L.P.

(Exact name of registrant as specified in its charter)

Maryland (Digital Realty Trust, Inc.) Maryland (Digital Realty Trust, L.P.)	26-0081711 20-2402955
(State or other jurisdiction of incorporation or organization)	(IRS employer identification number)
Four Embarcadero Center, Suite 3200 San Francisco, CA	94111
(Address of principal executive offices)	(Zip Code)

(415) 738-6500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Digital Realty Trust, Inc.	Yes  x      No   ¨
Digital Realty Trust, L.P.	Yes  x      No   ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Digital Realty Trust, Inc.	Yes  x      No   ¨
Digital Realty Trust, L.P.	Yes  x      No   ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Digital Realty Trust, Inc.:

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨ (Do not check if a smaller reporting company)	Smaller reporting company	¨

Digital Realty Trust, L.P.:

Large accelerated filer	¨	Accelerated filer	¨
Non-accelerated filer	x  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Digital Realty Trust, Inc.	Yes  ¨   No   x
Digital Realty Trust, L.P.	Yes  ¨   No   x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Digital Realty Trust, Inc.:

Class	Outstanding at October 30, 2015
Common Stock, $.01 par value per share	146,343,684

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the quarter ended September 30, 2015 of Digital Realty Trust, Inc., a Maryland corporation, and Digital Realty Trust, L.P., a Maryland limited partnership, of which Digital Realty Trust, Inc. is the sole general partner. Unless otherwise indicated or unless the context requires otherwise, all references in this report to “we,” “us,” “our,” “our company” or “the company” refer to Digital Realty Trust, Inc. together with its consolidated subsidiaries, including Digital Realty Trust, L.P. Unless otherwise indicated or unless the context requires otherwise, all references to “our operating partnership” or “the operating partnership” refer to Digital Realty Trust, L.P. together with its consolidated subsidiaries.

Digital Realty Trust, Inc. is a real estate investment trust, or REIT, and the sole general partner of Digital Realty Trust, L.P. As of September 30, 2015, Digital Realty Trust, Inc. owned an approximate 98.0% common general partnership interest in Digital Realty Trust, L.P. The remaining approximate 2.0% common limited partnership interests are owned by non-affiliated investors and certain directors and officers of Digital Realty Trust, Inc. As of September 30, 2015, Digital Realty Trust, Inc. owned all of the preferred limited partnership interests of Digital Realty Trust, L.P. As the sole general partner of Digital Realty Trust, L.P., Digital Realty Trust, Inc. has the full, exclusive and complete responsibility for the operating partnership’s day-to-day management and control.

We believe combining the quarterly reports on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. into this single report results in the following benefits:

• enhancing investors’ understanding of our company and our operating partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both our company and our operating partnership; and

• creating time and cost efficiencies through the preparation of one combined report instead of two separate reports.

There are a few differences between our company and our operating partnership, which are reflected in the disclosure in this report. We believe it is important to understand the differences between our company and our operating partnership in the context of how we operate as an interrelated consolidated company. Digital Realty Trust, Inc. is a REIT, whose only material asset is its ownership of partnership interests of Digital Realty Trust, L.P. As a result, Digital Realty Trust, Inc. generally does not conduct business itself, other than acting as the sole general partner of Digital Realty Trust, L.P., issuing public securities from time to time and guaranteeing certain unsecured debt of Digital Realty Trust, L.P. and certain of its subsidiaries and affiliates. Digital Realty Trust, Inc. itself has not issued any indebtedness but guarantees the unsecured debt of Digital Realty Trust, L.P. and certain of its subsidiaries, as disclosed in this report. Digital Realty Trust, L.P. holds substantially all the assets of the company and holds the ownership interests in the company’s joint ventures. Digital Realty Trust, L.P. conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to Digital Realty Trust, L.P. in exchange for partnership units, Digital Realty Trust, L.P. generally generates the capital required by the company’s business primarily through Digital Realty Trust, L.P.’s operations, by Digital Realty Trust, L.P.’s or its affiliates’ direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholders’ equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of Digital Realty Trust, L.P. The common limited partnership interests held by the limited partners in Digital Realty Trust, L.P. are presented as limited partners’ capital within partners’ capital in Digital Realty Trust, L.P.’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in Digital Realty Trust, L.P. are presented as general partner’s capital within partners’ capital in Digital Realty Trust, L.P.’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Digital Realty Trust, L.P. levels.

2

To help investors understand the significant differences between the company and the operating partnership, this report presents the following separate sections for each of the company and the operating partnership:

• Condensed consolidated financial statements;

• the following notes to the condensed consolidated financial statements:

• "Debt of the Company" and "Debt of the Operating Partnership";

• "Income per Share" and "Income per Unit"; and

• "Equity and Accumulated Other Comprehensive Income, Net" and "Capital and Accumulated Other Comprehensive Income";

• Part I, Item 2. "Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources"; and

• Part II, Item 2. "Unregistered Sales of Equity Securities and Use of Proceeds".

This report also includes separate Item 4. "Controls and Procedures" sections and separate Exhibit 31 and 32 certifications for each of the company and the operating partnership in order to establish that the Chief Executive Officer and the Chief Financial Officer of each entity during the period covered by this report have made the requisite certifications and that the company and the operating partnership are compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934 and 18 U.S.C. §1350.

In order to highlight the differences between the company and the operating partnership, the separate sections in this report for the company and the operating partnership specifically refer to the company and the operating partnership. In the sections that combine disclosure of the company and the operating partnership, this report refers to actions or holdings as being actions or holdings of the company. Although the operating partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the company is appropriate because the business is one enterprise and the company generally operates the business through the operating partnership.

As general partner with control of the operating partnership, Digital Realty Trust, Inc. consolidates the operating partnership for financial reporting purposes, and it does not have significant assets other than its investment in the operating partnership. Therefore, the assets and liabilities of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. are generally the same on their respective condensed consolidated financial statements. The separate discussions of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. in this report should be read in conjunction with each other to understand the results of the company on a consolidated basis and how management operates the company.

3

DIGITAL REALTY TRUST, INC. AND DIGITAL REALTY TRUST, L.P.

FORM 10-Q

FOR THE QUARTER ENDED SEPTEMBER 30, 2015

TABLE OF CONTENTS

		Page  Number
PART I.	FINANCIAL INFORMATION
ITEM 1.	Condensed Consolidated Financial Statements of Digital Realty Trust, Inc.:
	Condensed Consolidated Balance Sheets as of September 30, 2015 (unaudited) and December 31, 2014	5
	Condensed Consolidated Income Statements for the three and nine months ended September 30, 2015 and 2014 (unaudited)	6
	Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 and 2014 (unaudited)	7
	Condensed Consolidated Statement of Equity for the nine months ended September 30, 2015 (unaudited)	8
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 and 2014 (unaudited)	9
	Condensed Consolidated Financial Statements of Digital Realty Trust, L.P.:
	Condensed Consolidated Balance Sheets as of September 30, 2015 (unaudited) and December 31, 2014	12
	Condensed Consolidated Income Statements for the three and nine months ended September 30, 2015 and 2014 (unaudited)	13
	Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 and 2014 (unaudited)	14
	Condensed Consolidated Statement of Capital for the nine months ended September 30, 2015 (unaudited)	15
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 and 2014 (unaudited)	16
	Notes to Condensed Consolidated Financial Statements of Digital Realty Trust, Inc. and Digital Realty Trust, L.P.	19
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	49
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk	77
ITEM 4.	Controls and Procedures (Digital Realty Trust, Inc.)	78
	Controls and Procedures (Digital Realty Trust, L.P.)	78
PART II.	OTHER INFORMATION	80
ITEM 1.	Legal Proceedings	80
ITEM 1A.	Risk Factors	80
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	80
ITEM 3.	Defaults Upon Senior Securities	80
ITEM 4.	Mine Safety Disclosures	80
ITEM 5.	Other Information	80
ITEM 6.	Exhibits	82
	Signatures	84

4

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)

	September 30, 2015			December 31, 2014
	(unaudited)
ASSETS
Investments in real estate:
Properties:
Land	$	640,971		$	671,602
Acquired ground leases	12,950			12,196
Buildings and improvements	8,980,621			8,823,814
Tenant improvements	542,652			475,000
Total investments in properties	10,177,194			9,982,612
Accumulated depreciation and amortization	(2,137,631		)	(1,874,054		)
Net investments in properties	8,039,563			8,108,558
Investment in unconsolidated joint ventures	103,703			94,729
Net investments in real estate	8,143,266			8,203,287
Cash and cash equivalents	22,998			34,814
Accounts and other receivables, net of allowance for doubtful accounts of $7,041 and $6,302    as of September 30, 2015 and December 31, 2014, respectively	157,994			135,931
Deferred rent	475,796			447,643
Acquired above-market leases, net	30,617			38,605
Acquired in-place lease value and deferred leasing costs, net	405,824			456,962
Deferred financing costs, net	29,173			30,821
Restricted cash	12,500			18,062
Assets held for sale	173,461			120,471
Other assets	49,384			40,188
Total assets	$	9,501,013		$	9,526,784
LIABILITIES AND EQUITY
Global revolving credit facility	$	688,957		$	525,951
Unsecured term loan	938,276			976,600
Unsecured senior notes, net of discount	2,816,359			2,791,758
Mortgage loans, including premiums	304,987			378,818
Accounts payable and other accrued liabilities	513,555			605,923
Accrued dividends and distributions	—			115,019
Acquired below-market leases, net	88,632			104,235
Security deposits and prepaid rents	107,704			108,478
Obligations associated with assets held for sale	6,892			5,764
Total liabilities	5,465,362			5,612,546
Commitments and contingencies
Equity:
Stockholders’ Equity:
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Series E Cumulative Redeemable Preferred Stock, 7.000%, $287,500 and $287,500 liquidation preference, respectively ($25.00 per share), 11,500,000 and 11,500,000 shares issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	277,172			277,172
Series F Cumulative Redeemable Preferred Stock, 6.625%, $182,500 and $182,500 liquidation preference, respectively ($25.00 per share), 7,300,000 and 7,300,000 shares issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	176,191			176,191
Series G Cumulative Redeemable Preferred Stock, 5.875%, $250,000 and $250,000 liquidation preference, respectively ($25.00 per share), 10,000,000 and 10,000,000 shares issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	241,468			241,468
Series H Cumulative Redeemable Preferred Stock, 7.375%, $365,000 and $365,000 liquidation preference, respectively ($25.00 per share), 14,600,000 and 14,600,000 shares issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	353,290			353,290
Series I Cumulative Redeemable Preferred Stock, 6.350%, $250,000 and $0 liquidation preference, respectively ($25.00 per share), 10,000,000 and 0 shares issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	241,683			—
Common Stock: $0.01 par value, 215,000,000 shares authorized, 135,843,684 and    135,626,255 shares issued and outstanding as of September 30, 2015 and    December 31, 2014, respectively	1,351			1,349
Additional paid-in capital	3,977,945			3,970,439
Accumulated dividends in excess of earnings	(1,185,633		)	(1,096,607		)
Accumulated other comprehensive loss, net	(87,988		)	(45,046		)
Total stockholders’ equity	3,995,479			3,878,256
Noncontrolling Interests:
Noncontrolling interests in operating partnership	33,411			29,191
Noncontrolling interests in consolidated joint ventures	6,761			6,791
Total noncontrolling interests	40,172			35,982
Total equity	4,035,651			3,914,238
Total liabilities and equity	$	9,501,013		$	9,526,784

See accompanying notes to the condensed consolidated financial statements.

5

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED INCOME STATEMENTS

(unaudited, in thousands, except share and per share data)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Operating Revenues:
Rental	$	338,330		$	317,064		$	988,172		$	936,270
Tenant reimbursements	95,484			92,209			268,885			261,517
Fee income	1,595			2,748			4,758			5,397
Other	580			165			1,078			1,038
Total operating revenues	435,989			412,186			1,262,893			1,204,222
Operating Expenses:
Rental property operating and maintenance	140,538			130,894			394,640			375,586
Property taxes	19,953			25,765			64,116			68,485
Insurance	2,140			2,145			6,449			6,463
Change in fair value of contingent consideration	(1,594		)	(1,465		)	(44,276		)	(4,102		)
Depreciation and amortization	136,974			137,474			397,571			405,186
General and administrative	22,755			20,709			69,562			71,708
Transactions	11,042			144			14,301			980
Impairment of investments in real estate	—			12,500			—			12,500
Other	51			1,648			29			2,584
Total operating expenses	331,859			329,814			902,392			939,390
Operating income	104,130			82,372			360,501			264,832
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	4,169			3,455			12,170			9,513
Gain (loss) on sale of properties	(207		)	—			94,282			15,945
Gain on contribution of properties to unconsolidated joint ventures	—			93,498			—			95,404
Interest and other income (expense)	(358		)	378			(2,879		)	2,022
Interest expense	(48,138		)	(48,169		)	(139,718		)	(144,689		)
Tax expense	(1,754		)	(1,178		)	(6,044		)	(4,037		)
Loss from early extinguishment of debt	—			(195		)	(148		)	(780		)
Net income	57,842			130,161			318,164			238,210
Net income attributable to noncontrolling interests	(864		)	(2,392		)	(5,492		)	(4,190		)
Net income attributable to Digital Realty Trust, Inc.	56,978			127,769			312,672			234,020
Preferred stock dividends	(18,456		)	(18,455		)	(55,367		)	(49,010		)
Net income available to common stockholders	$	38,522		$	109,314		$	257,305		$	185,010
Net income per share available to common stockholders:
Basic	$	0.28		$	0.81		$	1.89		$	1.39
Diluted	$	0.28		$	0.80		$	1.88		$	1.39
Weighted average common shares outstanding:
Basic	135,832,503			135,492,618			135,782,831			132,635,894
Diluted	138,259,936			135,946,533			136,920,477			132,852,966

See accompanying notes to the condensed consolidated financial statements.

6

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in thousands)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Net income	$	57,842		$	130,161		$	318,164		$	238,210
Other comprehensive income:
Foreign currency translation adjustments	(19,105		)	(39,470		)	(41,480		)	(30,730		)
Increase (decrease) in fair value of interest rate swaps	(2,534		)	2,435			(4,374		)	(3,647		)
Reclassification to interest expense from interest rate swaps	574			867			2,077			2,567
Comprehensive income	36,777			93,993			274,387			206,400
Comprehensive income attributable to noncontrolling interests	(463		)	(1,656		)	(4,657		)	(3,541		)
Comprehensive income attributable to Digital Realty Trust, Inc.	$	36,314		$	92,337		$	269,730		$	202,859

See accompanying notes to the condensed consolidated financial statements.

7

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF EQUITY

(unaudited, in thousands, except share data)

	Preferred Stock		Number of Common Shares	Common Stock		Additional Paid-in Capital			Accumulated Dividends in Excess of Earnings			Accumulated Other Comprehensive Loss, Net			Total Stockholders’ Equity			Noncontrolling Interests in Operating Partnership			Noncontrolling Interests in Consolidated Joint Ventures			Total Noncontrolling Interests			Total Equity
Balance as of December 31, 2014	$	1,048,121	135,626,255	$	1,349	$	3,970,439		$	(1,096,607	)	$	(45,046	)	$	3,878,256		$	29,191		$	6,791		$	35,982		$	3,914,238
Conversion of units to common stock	—		118,587	2		1,362			—			—			1,364			(1,364		)	—			(1,364		)	—
Issuance of unvested restricted stock, net of forfeitures	—		71,881	—		—			—			—			—			—			—			—			—
Common stock offering costs, net	—		—	—		1,498			—			—			1,498			—			—			—			1,498
Exercise of stock options	—		26,961	—		798			—			—			798			—			—			—			798
Issuance of series I preferred stock, net of offering costs	241,683		—	—		—			—			—			241,683			—			—			—			241,683
Amortization of share-based compensation	—		—	—		12,450			—			—			12,450			—			—			—			12,450
Reclassification of vested share-based awards	—		—	—		(8,602		)	—			—			(8,602		)	8,602			—			8,602			—
Dividends declared on preferred stock	—		—	—		—			(55,367		)	—			(55,367		)	—			—			—			(55,367		)
Dividends and distributions on common stock and common and incentive units	—		—	—		—			(346,331		)	—			(346,331		)	(7,333		)	—			(7,333		)	(353,664		)
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions	—		—	—		—			—			—			—			—			(372		)	(372		)	(372		)
Net income	—		—	—		—			312,672			—			312,672			5,150			342			5,492			318,164
Other comprehensive income—foreign currency translation adjustments	—		—	—		—			—			(40,688		)	(40,688		)	(792		)	—			(792		)	(41,480		)
Other comprehensive loss—fair value of interest rate swaps	—		—	—		—			—			(4,290		)	(4,290		)	(84		)	—			(84		)	(4,374		)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense	—		—	—		—			—			2,036			2,036			41			—			41			2,077
Balance as of September 30, 2015	$	1,289,804	135,843,684	$	1,351	$	3,977,945		$	(1,185,633	)	$	(87,988	)	$	3,995,479		$	33,411		$	6,761		$	40,172		$	4,035,651

See accompanying notes to the condensed consolidated financial statements.

8

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Nine Months Ended September 30,
	2015			2014
Cash flows from operating activities:
Net income	$	318,164		$	238,210
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of properties	(94,282		)	(15,945		)
Gain on contribution of investment property to unconsolidated joint venture	—			(95,404		)
Impairment of investments in real estate	—			12,500
Equity in earnings of unconsolidated joint ventures	(12,170		)	(9,513		)
Change in fair value of accrued contingent consideration	(44,276		)	(4,102		)
Distributions from unconsolidated joint ventures	10,786			6,032
Write-off of net assets due to early lease terminations	(8		)	2,239
Depreciation and amortization of buildings and improvements, tenant improvements    and acquired ground leases	346,459			340,645
Amortization of share-based compensation	5,717			15,489
Allowance for doubtful accounts	739			2,076
Amortization of deferred financing costs	6,360			6,762
Loss on early extinguishment of debt	148			780
Amortization of debt discount/premium	1,472			1,352
Amortization of acquired in-place lease value and deferred leasing costs	51,112			64,541
Amortization of acquired above-market leases and acquired below-market leases, net	(6,856		)	(7,710		)
Changes in assets and liabilities:
Restricted cash	2,878			11,060
Accounts and other receivables	(1,382		)	(16,377		)
Deferred rent	(41,447		)	(58,874		)
Deferred leasing costs	(2,611		)	(15,178		)
Other assets	(14,869		)	(12,895		)
Accounts payable and other accrued liabilities	13,213			3,668
Security deposits and prepaid rents	60			3,211
Net cash provided by operating activities	539,207			472,567
Cash flows from investing activities:
Acquisitions of real estate	(48,424		)	(24,305		)
Proceeds from sale of properties, net	185,565			37,945
Proceeds from contribution of investment properties to unconsolidated joint ventures	—			178,933
Investment in unconsolidated joint ventures	(7,547		)	(20,627		)
Investment in equity securities	—			(2		)
Receipt of value added tax refund	2,934			8,457
Refundable value added tax paid	(24,142		)	(13,882		)
Change in restricted cash	1,520			15,237
Improvements to investments in real estate	(535,141		)	(644,637		)
Improvement advances to tenants	(26,977		)	(15,505		)
Collection of advances from tenants for improvements	26,971			13,500
Net cash used in investing activities	(425,241		)	(464,886		)

See accompanying notes to the condensed consolidated financial statements.

9

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(unaudited, in thousands)

	Nine Months Ended September 30,
	2015			2014
Cash flows from financing activities:
Borrowings on revolving credit facility	$	1,430,671		$	952,590
Repayments on revolving credit facility	(1,240,340		)	(1,182,341		)
Principal payments on unsecured notes	(374,927		)	—
Repayments on other unsecured loans	(67,000		)	—
Borrowings on 3.950% unsecured senior notes due 2022	496,190			—
Borrowings on 4.750% unsecured senior notes due 2023	—			495,872
Principal payments on mortgage loans	(73,724		)	(139,974		)
Earnout payments related to acquisitions	(12,985		)	(11,011		)
Change in restricted cash	1,137			1,169
Payment of loan fees and costs	(5,116		)	(5,209		)
Capital distributions paid to noncontrolling interests in consolidated joint ventures, net	(372		)	(501		)
Gross proceeds from the issuance of preferred stock	250,000			365,000
Common and preferred stock offering costs paid, net	(5,934		)	(11,921		)
Proceeds from exercise of stock options	798			237
Payment of dividends to preferred stockholders	(55,367		)	(49,010		)
Payment of dividends to common stockholders and distributions to     noncontrolling interests in operating partnership	(468,813		)	(441,735		)
Net cash used in financing activities	(125,782		)	(26,834		)
Net decrease in cash and cash equivalents	(11,816		)	(19,153		)
Cash and cash equivalents at beginning of period	34,814			50,080
Cash and cash equivalents at end of period	$	22,998		$	30,927

See accompanying notes to the condensed consolidated financial statements.

10

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(unaudited, in thousands)

	Nine Months Ended September 30,
	2015			2014
Supplemental disclosure of cash flow information:
Cash paid for interest	$	146,105		$	150,212
Cash paid for income taxes	2,979			3,012
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	$	(41,480	)	$	(30,104	)
Decrease in accounts payable and other accrued liabilities related to change in    fair value of interest rate swaps	(4,374		)	(3,572		)
Noncontrolling interests in operating partnership redeemed for or converted to    shares of common stock	1,364			229
Accrual for additions to investments in real estate and tenant improvement advances    included in accounts payable and accrued expenses	115,632			199,916
Accrual for potential earnout contingency	18,900			12,816
Issuance of common units associated with exchange of exchangeable senior debentures	—			261,166
Note receivable related to sale of property	9,000			—
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate	48,424			24,305
Cash paid for acquisition of real estate	$	48,424		$	24,305

See accompanying notes to the condensed consolidated financial statements.

11

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except unit and per unit data)

	September 30, 2015			December 31, 2014
	(unaudited)
ASSETS
Investments in real estate:
Properties:
Land	$	640,971		$	671,602
Acquired ground leases	12,950			12,196
Buildings and improvements	8,980,621			8,823,814
Tenant improvements	542,652			475,000
Total investments in properties	10,177,194			9,982,612
Accumulated depreciation and amortization	(2,137,631		)	(1,874,054		)
Net investments in properties	8,039,563			8,108,558
Investment in unconsolidated joint ventures	103,703			94,729
Net investments in real estate	8,143,266			8,203,287
Cash and cash equivalents	22,998			34,814
Accounts and other receivables, net of allowance for doubtful accounts of $7,041 and $6,302    as of September 30, 2015 and December 31, 2014, respectively	157,994			135,931
Deferred rent	475,796			447,643
Acquired above-market leases, net	30,617			38,605
Acquired in-place lease value and deferred leasing costs, net	405,824			456,962
Deferred financing costs, net	29,173			30,821
Restricted cash	12,500			18,062
Assets held for sale	173,461			120,471
Other assets	49,384			40,188
Total assets	$	9,501,013		$	9,526,784
LIABILITIES AND CAPITAL
Global revolving credit facility	$	688,957		$	525,951
Unsecured term loan	938,276			976,600
Unsecured senior notes, net of discount	2,816,359			2,791,758
Mortgage loans, including premiums	304,987			378,818
Accounts payable and other accrued liabilities	513,702			605,923
Due to Parent	242,689			—
Accrued dividends and distributions	—			115,019
Acquired below-market leases, net	88,632			104,235
Security deposits and prepaid rents	107,704			108,478
Obligations associated with assets held for sale	6,892			5,764
Total liabilities	5,708,198			5,612,546
Commitments and contingencies
Capital:
Partners’ capital:
General Partner:
Series E Cumulative Redeemable Preferred Units, 7.000%, $287,500 and $287,500 liquidation preference, respectively ($25.00 per unit), 11,500,000 and 11,500,000 units issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	277,172			277,172
Series F Cumulative Redeemable Preferred Units, 6.625%, $182,500 and $182,500 liquidation preference, respectively ($25.00 per unit), 7,300,000 and 7,300,000 units issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	176,191			176,191
Series G Cumulative Redeemable Preferred Units, 5.875%, $250,000 and $250,000 liquidation preference, respectively ($25.00 per unit), 10,000,000 and 10,000,000 units issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	241,468			241,468
Series H Cumulative Redeemable Preferred Units, 7.375%, $365,000 and $365,000 liquidation preference, respectively ($25.00 per unit), 14,600,000 and 14,600,000 units issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	353,290			353,290
Common units:
135,843,684 and 135,626,255 units issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	2,792,510			2,875,181
Limited partners, 1,421,314 and 1,463,814 common units, 1,035,062 and 1,170,610 profits interest units and 379,237 and 379,237 class C units outstanding as of September 30, 2015 and December 31, 2014, respectively	37,633			32,578
Accumulated other comprehensive loss	(92,210		)	(48,433		)
Total partners’ capital	3,786,054			3,907,447
Noncontrolling interests in consolidated joint ventures	6,761			6,791
Total capital	3,792,815			3,914,238
Total liabilities and capital	$	9,501,013		$	9,526,784

See accompanying notes to the condensed consolidated financial statements.

12

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED INCOME STATEMENTS

(unaudited, in thousands, except unit and per unit data)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Operating Revenues:
Rental	$	338,330		$	317,064		$	988,172		$	936,270
Tenant reimbursements	95,484			92,209			268,885			261,517
Fee income	1,595			2,748			4,758			5,397
Other	580			165			1,078			1,038
Total operating revenues	435,989			412,186			1,262,893			1,204,222
Operating Expenses:
Rental property operating and maintenance	140,538			130,894			394,640			375,586
Property taxes	19,953			25,765			64,116			68,485
Insurance	2,140			2,145			6,449			6,463
Change in fair value of contingent consideration	(1,594		)	(1,465		)	(44,276		)	(4,102		)
Depreciation and amortization	136,974			137,474			397,571			405,186
General and administrative	22,755			20,709			69,562			71,708
Transactions	11,042			144			14,301			980
Impairment of investments in real estate	—			12,500			—			12,500
Other	51			1,648			29			2,584
Total operating expenses	331,859			329,814			902,392			939,390
Operating income	104,130			82,372			360,501			264,832
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	4,169			3,455			12,170			9,513
Gain (loss) on sale of properties	(207		)	—			94,282			15,945
Gain on contribution of properties to unconsolidated joint ventures	—			93,498			—			95,404
Interest and other income (expense)	(358		)	378			(2,879		)	2,022
Interest expense	(49,291		)	(48,169		)	(140,871		)	(144,689		)
Tax expense	(1,754		)	(1,178		)	(6,044		)	(4,037		)
Loss from early extinguishment of debt	—			(195		)	(148		)	(780		)
Net income	56,689			130,161			317,011			238,210
Net income attributable to noncontrolling interests in consolidated joint ventures	(117		)	(120		)	(342		)	(352		)
Net income attributable to Digital Realty Trust, L.P.	56,572			130,041			316,669			237,858
Preferred units distributions	(18,456		)	(18,455		)	(55,367		)	(49,010		)
Net income available to common unitholders	$	38,116		$	111,586		$	261,302		$	188,848
Net income per unit available to common unitholders:
Basic	$	0.28		$	0.81		$	1.89		$	1.39
Diluted	$	0.27		$	0.80		$	1.88		$	1.39
Weighted average common units outstanding:
Basic	138,467,947			138,308,130			138,481,046			135,381,624
Diluted	139,192,198			138,762,045			139,050,965			135,598,696

See accompanying notes to the condensed consolidated financial statements.

13

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in thousands)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Net income	$	56,689		$	130,161		$	317,011		$	238,210
Other comprehensive income:
Foreign currency translation adjustments	(19,105		)	(39,470		)	(41,480		)	(30,730		)
Decrease in fair value of interest rate swaps	(2,534		)	2,435			(4,374		)	(3,647		)
Reclassification to interest expense from interest rate swaps	574			867			2,077			2,567
Comprehensive income	$	35,624		$	93,993		$	273,234		$	206,400

See accompanying notes to the condensed consolidated financial statements.

14

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CAPITAL

(unaudited, in thousands, except unit data)

	General Partner								Limited Partners					Accumulated Other Comprehensive Loss			Noncontrolling Interests in Consolidated Joint Ventures			Total Capital
	Preferred Units				Common Units				Common Units
	Units	Amount			Units	Amount			Units		Amount
Balance as of December 31, 2014	43,400,000	$	1,048,121		135,626,255	$	2,875,181		3,013,661		$	32,578		$	(48,433	)	$	6,791		$	3,914,238
Conversion of limited partner common units to general partner common units	—	—			118,587	1,364			(118,587	)	(1,364		)	—			—			—
Issuance of unvested restricted common units, net of forfeitures	—	—			71,881	—			—		—			—			—			—
Common stock offering costs, net	—	—			—	1,498			—		—			—			—			1,498
Issuance of common units in connection with the exercise of stock options	—	—			26,961	798			—		—			—			—			798
Issuance of common units, net of forfeitures	—	—			—	—			(59,461	)	—			—			—			—
Amortization of share-based compensation	—	—			—	12,450			—		—			—			—			12,450
Reclassification of vested share-based awards	—	—			—	(8,602		)	—		8,602			—			—			—
Distributions	—	(55,367		)	—	(346,331		)	—		(7,333		)	—			—			(409,031		)
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions	—	—			—	—			—		—			—			(372		)	(372		)
Net income	—	55,367			—	256,152			—		5,150			—			342			317,011
Other comprehensive income—foreign currency translation adjustments	—	—			—	—			—		—			(41,480		)	—			(41,480		)
Other comprehensive loss—fair value of interest rate swaps	—	—			—	—			—		—			(4,374		)	—			(4,374		)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense	—	—			—	—			—		—			2,077			—			2,077
Balance as of September 30, 2015	43,400,000	$	1,048,121		135,843,684	$	2,792,510		2,835,613		$	37,633		$	(92,210	)	$	6,761		$	3,792,815

See accompanying notes to the condensed consolidated financial statements.

15

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Nine Months Ended September 30,
	2015			2014
Cash flows from operating activities:
Net income	$	317,011		$	238,210
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of property	(94,282		)	(15,945		)
Gain on contribution of investment property to unconsolidated joint venture	—			(95,404		)
Impairment of investments in real estate	—			12,500
Equity in earnings of unconsolidated joint ventures	(12,170		)	(9,513		)
Change in fair value of accrued contingent consideration	(44,276		)	(4,102		)
Distributions from unconsolidated joint ventures	10,786			6,032
Write-off of net assets due to early lease terminations	(8		)	2,239
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases	346,459			340,645
Amortization of share-based compensation	5,717			15,489
Allowance for doubtful accounts	739			2,076
Amortization of deferred financing costs	6,360			6,762
Loss on early extinguishment of debt	148			780
Amortization of debt discount/premium	1,472			1,352
Amortization of acquired in-place lease value and deferred leasing costs	51,112			64,541
Amortization of acquired above-market leases and acquired below-market leases, net	(6,856		)	(7,710		)
Changes in assets and liabilities:
Restricted cash	2,878			11,060
Accounts and other receivables	(1,382		)	(16,377		)
Deferred rent	(41,447		)	(58,874		)
Deferred leasing costs	(2,611		)	(15,178		)
Other assets	(14,869		)	(12,895		)
Accounts payable and other accrued liabilities	14,366			3,668
Security deposits and prepaid rents	60			3,211
Net cash provided by operating activities	539,207			472,567
Cash flows from investing activities:
Acquisitions of real estate	(48,424		)	(24,305		)
Proceeds from sale of properties, net	185,565			37,945
Proceeds from contribution of investment properties to unconsolidated joint ventures	—			178,933
Investment in unconsolidated joint ventures	(7,547		)	(20,627		)
Investment in equity securities	—			(2		)
Receipt of value added tax refund	2,934			8,457
Refundable value added tax paid	(24,142		)	(13,882		)
Change in restricted cash	1,520			15,237
Improvements to investments in real estate	(535,141		)	(644,637		)
Improvement advances to tenants	(26,977		)	(15,505		)
Collection of advances from tenants for improvements	26,971			13,500
Net cash used in investing activities	(425,241		)	(464,886		)

See accompanying notes to the condensed consolidated financial statements.

16

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(unaudited, in thousands)

	Nine Months Ended September 30,
	2015			2014
Cash flows from financing activities:
Borrowings on revolving credit facility	$	1,430,671		$	952,590
Repayments on revolving credit facility	(1,240,340		)	(1,182,341		)
Principal payments on unsecured notes	(374,927		)	—
Repayments on other unsecured loans	(67,000		)	—
Borrowings on 3.950% unsecured senior notes due 2022	496,190			—
Borrowings on 4.750% unsecured senior notes due 2023	—			495,872
Principal payments on mortgage loans	(73,724		)	(139,974		)
Earnout payments related to acquisitions	(12,985		)	(11,011		)
Change in restricted cash	1,137			1,169
Payment of loan fees and costs	(5,116		)	(5,209		)
Capital distributions paid to noncontrolling interests in consolidated joint ventures, net	(372		)	(501		)
General partner contributions, net	2,175			353,316
Due to Parent	242,689			—
Payment of distributions to preferred unitholders	(55,367		)	(49,010		)
Payment of distributions to common unitholders	(468,813		)	(441,735		)
Net cash used in financing activities	(125,782		)	(26,834		)
Net decrease in cash and cash equivalents	(11,816		)	(19,153		)
Cash and cash equivalents at beginning of period	34,814			50,080
Cash and cash equivalents at end of period	$	22,998		$	30,927

See accompanying notes to the condensed consolidated financial statements.

17

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(unaudited, in thousands)

	Nine Months Ended September 30,
	2015			2014
Supplemental disclosure of cash flow information:
Cash paid for interest	$	146,105		$	150,212
Cash paid for income taxes	2,979			3,012
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	(41,480		)	(30,104		)
Decrease in accounts payable and other accrued liabilities related to change in    fair value of interest rate swaps	(4,374		)	(3,572		)
Accrual for additions to investments in real estate and tenant improvement advances    included in accounts payable and accrued expenses	115,632			199,916
Accrual for potential earnout contingency	18,900			12,816
Issuance of common units associated with exchange of exchangeable senior debentures	—			261,166
Note receivable related to sale of property	9,000			—
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate	48,424			24,305
Cash paid for acquisition of real estate	$	48,424		$	24,305

See accompanying notes to the condensed consolidated financial statements.

18

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

September 30, 2015 and 2014

1. Organization and Description of Business

Digital Realty Trust, Inc. through its controlling interest in Digital Realty Trust, L.P. (the Operating Partnership) and the subsidiaries of the Operating Partnership (collectively, we, our, us or the Company) is engaged in the business of owning, acquiring, developing and managing technology-related real estate. The Company is focused on providing data center and colocation solutions for domestic and international tenants across a variety of industry verticals ranging from financial services, cloud and information technology services, to manufacturing, energy, healthcare, and consumer products. As of September 30, 2015, our portfolio consisted of 132 properties, including eight properties held for sale, 14 properties held as investments in unconsolidated joint ventures and developable land, of which 103 are located throughout North America, 23 are located in Europe, three are located in Australia and three are located in Asia. We are diversified in major metropolitan areas where corporate data center and technology tenants are concentrated, including the Boston, Chicago, Dallas, Los Angeles, New York Metro, Northern Virginia, Phoenix, San Francisco and Silicon Valley metropolitan areas in the United States, the Amsterdam, Dublin, London and Paris metropolitan areas in Europe and the Singapore, Sydney, Melbourne, Hong Kong and Osaka metropolitan areas in the Asia Pacific region. The portfolio consists of Internet gateway and corporate data center properties, technology manufacturing properties and regional or national offices of technology companies.

The Operating Partnership was formed on July 21, 2004 in anticipation of Digital Realty Trust, Inc.’s initial public offering (IPO) on November 3, 2004 and commenced operations on that date. As of September 30, 2015, Digital Realty Trust, Inc. owns a 98.0% common interest and a 100.0% preferred interest in the Operating Partnership. As sole general partner of the Operating Partnership, Digital Realty Trust, Inc. has the full, exclusive and complete responsibility for the Operating Partnership’s day-to-day management and control. The limited partners of the Operating Partnership do not have rights to replace Digital Realty Trust, Inc. as the general partner nor do they have participating rights, although they do have certain protective rights.

On October 9, 2015, we completed the acquisition of Telx Holdings, Inc. from private equity firms ABRY Partners and Berkshire Partners. See Note 17 "Subsequent Events" for further discussion of the acquisition.

2. Summary of Significant Accounting Policies

(a) Principles of Consolidation and Basis of Presentation

The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated.

The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014.

The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits:

• enhancing investors’ understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

• creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes.

There are a few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how we operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership and a $242.7 million intercompany

19

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

loan, which was repaid subsequent to the period covered by this report. As a result, Digital Realty Trust, Inc. generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public securities from time to time and guaranteeing certain unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates. Digital Realty Trust, Inc. itself has not issued any indebtedness but guarantees the unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates, as disclosed in these notes.

The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company’s joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units or loaned to Digital Realty Trust, L.P. on a temporary basis prior to contribution in exchange for partnership units, the Operating Partnership generally generates the capital required by the Company’s business primarily through the Operating Partnership’s operations, by the Operating Partnership’s or its affiliates’ direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholders’ equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners’ capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner’s capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels.

To help investors understand the significant differences between the Company and the Operating Partnership, these consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership:

• condensed consolidated face financial statements; and

• the following notes to the condensed consolidated financial statements:

• "Debt of the Company" and "Debt of the Operating Partnership";

• "Income per Share" and "Income per Unit"; and

• "Equity and Accumulated Other Comprehensive Income, Net" and "Capital and Accumulated Other Comprehensive Income".

In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company generally operates the business through the Operating Partnership.

(b) Cash Equivalents

For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of September 30, 2015, cash equivalents consist of investments in money market instruments.

(c) Investment in Unconsolidated Joint Ventures

The Company’s investment in unconsolidated joint ventures is accounted for using the equity method, whereby the investment is increased for capital contributed and our share of the joint ventures’ net income and decreased by distributions we receive and our share of any losses of the joint ventures.

We amortize the difference between the cost of our investments in unconsolidated joint ventures and the book value of the underlying equity into equity in earnings from unconsolidated affiliates on a straight-line basis consistent with the lives of the underlying assets.

20

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

(d) Capitalization of Costs

Direct and indirect project costs that are clearly associated with the development of properties are capitalized as incurred. Project costs include all costs directly associated with the development of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development are not capitalized and are charged to expense as incurred.

Capitalization of costs begins when the activities necessary to get the development project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development project is substantially complete and ready for its intended use. Determining when a development project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development project to be substantially complete and ready for its intended use upon receipt of a certificate of occupancy. If and when development of a property is suspended pursuant to a formal change in the planned use of the property, we will evaluate whether the accumulated costs exceed the estimated value of the project and write off the amount of any such excess accumulated costs. For a development project that is suspended for reasons other than a formal change in the planned use of such property, the accumulated project costs are evaluated for impairment consistent with our impairment policies for long-lived assets. Capitalized costs are allocated to the specific components of a project that are benefited.

We capitalized interest of approximately $2.4 million and $5.4 million during the three months ended September 30, 2015 and 2014, respectively, and $9.9 million and $15.6 million during the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation and other overhead expense of employees direct and incremental to construction and successful leasing activities of approximately $18.2 million and $14.4 million, during the three months ended September 30, 2015 and 2014, respectively, and $46.6 million and $42.3 million during the nine months ended September 30, 2015 and 2014, respectively. Capitalized leasing costs of approximately $37.8 million and $37.1 million are included in improvements to investments in real estate in cash flows from investing activities in the condensed consolidated statements of cash flows for the nine months ended September 30, 2015 and 2014, respectively.

(e) Share-Based Compensation

The Company measures all share-based compensation awards at fair value on the date they are granted to employees and directors, and recognizes compensation cost, net of forfeitures, over the requisite service period for awards with only a service condition. The estimated fair value of the long-term incentive units and Class D Units (discussed in Note 13 "Incentive Plan") granted by us is being amortized on a straight-line basis over the expected service period.

The fair value of share-based compensation awards that contain a market condition is measured using a Monte Carlo simulation method and not adjusted based on actual achievement of the performance goals.

(f) Income Taxes

Digital Realty Trust, Inc. has elected to be treated as a real estate investment trust (a “REIT”) for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. generally is not required to pay federal corporate income tax to the extent taxable income is currently distributed to its stockholders. If Digital Realty Trust, Inc. fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.

The Company is subject to foreign, state and local income taxes in the jurisdictions in which it conducts business. The Company’s U.S. consolidated taxable REIT subsidiaries are subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes current and deferred income taxes for its taxable REIT subsidiaries, certain states and non-U.S. jurisdictions, as appropriate.

We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered “more-likely-than-not” to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of September 30, 2015 and December 31, 2014, we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated income statements. For the three and nine months ended September 30, 2015 and 2014, we had no such

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September 30, 2015 and 2014

interest or penalties. The tax year 2012 and thereafter remain open to examination by the major taxing jurisdictions with which the Company files tax returns.

See Note 10 "Income Taxes" for further discussion on income taxes.

(g) Presentation of Transactional-based Taxes

We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis.

(h) Fee Income

Occasionally, customers engage the company for certain services. The nature of these services historically involves property management, construction management, and assistance with financing. The proper revenue recognition of these services can be different, depending on whether the arrangements are service revenue or contractor type revenue.

Service revenues are typically recognized on an equal monthly basis based on the minimum fee to be earned. The monthly amounts could be adjusted depending on if certain performance milestones are met.

Fee income also includes management fees. These fees arise from contractual agreements with entities in which we have a noncontrolling interest. The management fees are recognized as earned under the respective agreements. Management and other fee income related to partially owned entities are recognized to the extent attributable to the unaffiliated interest.

(i) Assets and Liabilities Measured at Fair Value

Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the lowest level input that is significant would be used to determine the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

(j) Transactions Expense

Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and significant transactions.

(k) Gains on Sale of Properties

Gains on sale of properties are recognized using the full accrual or partial sale methods, as applicable, in accordance with U.S. GAAP, provided various criteria relating to the terms of sale and any subsequent involvement with the real estate sold are satisfied.

(l) Management’s Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the

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September 30, 2015 and 2014

date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to the valuation of our real estate properties, contingent consideration, accounts receivable and deferred rent receivable, performance-based equity compensation plans, the completeness of accrued liabilities and Digital Realty Trust, Inc.’s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions.

(m) Segment and Geographic Information

All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of real estate services provided to them are standardized throughout the portfolio. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment.

Operating revenues from properties in the United States were $334.5 million and $314.9 million and outside the United States were $101.4 million and $97.3 million for the three months ended September 30, 2015 and 2014, respectively. Operating revenues from properties in the United States were $971.6 million and $915.7 million and outside the United States were $291.3 million and $288.6 million for the nine months ended September 30, 2015 and 2014, respectively. We had long-lived assets located in the United States of $5.4 billion and $5.4 billion and outside the United States of $2.6 billion and $2.7 billion as of September 30, 2015 and December 31, 2014, respectively.

Operating revenues from properties located in the United Kingdom were $55.2 million and $55.1 million, or 12.7% and 13.4% of total operating revenues, for the three months ended September 30, 2015 and 2014, respectively. Operating revenues from properties located in the United Kingdom were $160.1 million and $164.5 million, or 12.7% and 13.7% of total operating revenues, for the nine months ended September 30, 2015 and 2014, respectively. No other foreign country comprised more than 10% of total operating revenues for each of these periods. We had long-lived assets located in the United Kingdom of $1.7 billion and $1.7 billion, or 20.9% and 21.3% of total long-lived assets, as of September 30, 2015 and December 31, 2014, respectively. No other foreign country comprised more than 10% of total long-lived assets as of September 30, 2015 and December 31, 2014.

(n) Reclassifications

Certain reclassifications of prior year amounts have been made to conform to the current year presentation. During the three and nine months ended September 30, 2014, $0.1 million and $0.3 million, respectively, were reclassified from rental property operating and maintenance expense to other expense. Additionally, as of December 31, 2014, $6.5 million was reclassified from cash and cash equivalents to restricted cash to correct an immaterial classification error related to certain bank accounts for which certain mortgage lenders have disbursement approval rights.

(o) Recent Accounting Pronouncements

In February 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which provides guidance on the consolidation evaluation for reporting organizations that are required to evaluate whether they should consolidate certain legal entities. In accordance with the guidance, all legal entities are subject to reevaluation under the revised consolidation model. The guidance is effective in the first quarter of 2016, and early adoption is permitted. We are currently evaluating the potential impact of the adoption of ASU 2015-02 on our consolidated financial statements.

On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however, if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. We are currently assessing the impact of the guidance on our consolidated financial statements.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

On April 17, 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the associated debt liability.  Currently, debt issuance costs are recorded as an asset and amortization of these deferred financing costs is recorded in interest expense.  Under the new standard, debt issuance costs will continue to be amortized over the life of the debt instrument and amortization will continue to be recorded in interest expense.  The new standard is effective for the Company on January 1, 2016 and will be applied on a retrospective basis.  The Company is currently evaluating ASU 2015-03, and anticipates a change in our presentation only since the standard does not alter the accounting for debt issuance costs.

In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement Period Adjustments (Topic 805). ASU 2015-16 requires an acquirer in a business combination to recognize provisional amounts when measurements were incomplete as of the end of a reporting period as an adjustment in the reporting period in which the provisional amount is determined. Prior to this standard, the acquirer was required to adjust such provisional amounts by restating prior period financial statements. ASU 2015-16 is effective for the annual period ending December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The Company elected to early adopt this standard effective with the interim period beginning July 1, 2015 and this standard did not have a material effect on the consolidated financial statements.

3. Investments in Real Estate

We acquired the following real estate properties during the nine months ended September 30, 2015:

Location	Metropolitan Area	Date Acquired	Amount (in millions) (1)
Deer Park 3 (2)	Melbourne	April 15, 2015	$	1.6
3 Loyang Way (3)(4)	Singapore	June 25, 2015	45.0
			$	46.6

(1) Purchase price in U.S. dollars and excludes capitalized closing costs on land acquisitions. Purchase prices for acquisitions outside the United States are based on the exchange rate at the date of acquisition.

(2) Represents currently vacant land which is not included in our operating property count.

(3) Represents a development property with an existing shell, which is included in our operating property count. This acquisition lacked key inputs to qualify as a business combination under purchase accounting guidance, and has therefore been accounted for as an asset acquisition, not a business combination.

(4) Property is subject to a ground lease, which expires in February 2024, with a renewal provision of an additional 28 years upon satisfaction of certain requirements.

Dispositions

We sold the following real estate properties during the nine months ended September 30, 2015:

Location	Metropolitan Area	Date Sold	Gross Proceeds (in millions)			Gain on Sale (in millions)
100 Quannapowitt Parkway	Boston	February 5, 2015	$	31.1		$	10.1
3300 East Birch Street	Los Angeles	March 31, 2015	14.2			7.5
833 Chestnut Street	Philadelphia	April 30, 2015	160.8		(1)	76.7
			$	206.1		$	94.3

(1) Gross proceeds includes a $9.0 million note receivable, which is expected to be collected by year-end.

We have identified certain non-core investment properties we intend to sell as part of our capital recycling strategy. Our capital recycling program is designed to identify non-strategic and underperforming assets that can be sold to generate proceeds that will support the funding of our core investment activity. We expect our capital recycling initiative will likewise have a meaningfully positive impact on overall return on invested capital. In addition, our capital recycling program does not represent a strategic shift, as we are not entirely exiting regions or property types. During this process, we are evaluating the carrying value of certain investment properties identified for potential sale to ensure the carrying value is recoverable in light of a potentially shorter holding period. As a result of our evaluation, during the year ended December 31, 2014, we recognized approximately $126.5 million of impairment losses on five properties located in the Central, East and West regions. The fair

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

value of the five properties were primarily based on discounted cash flow analysis, and in certain cases, we supplemented the analysis by obtaining broker opinions of value. As of September 30, 2015, three of these five properties met the criteria to be classified as held for sale.

As of September 30, 2015, the Company had taken the necessary actions to conclude that an additional five properties (in addition to the three properties referenced above) to be disposed of as part of our capital recycling strategy met the criteria to be classified as held for sale. As of September 30, 2015, these eight properties had an aggregate carrying value of $173.5 million within total assets and $6.9 million within total liabilities and are shown as assets held for sale and obligations associated with assets held for sale on the condensed consolidated balance sheet. The eight properties are not representative of a significant component of our portfolio, nor do the potential sales represent a significant shift in our strategy.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

4. Investment in Unconsolidated Joint Ventures

As of September 30, 2015, our investment in unconsolidated joint ventures consists of effective 50% interests in three joint ventures that own data center properties at 2001 Sixth Avenue in Seattle, Washington, 2020 Fifth Avenue in Seattle, Washington and 33 Chun Choi Street in Hong Kong, and effective 20% interests in two joint ventures, one of which owns 10 data center properties with an investment fund managed by Prudential Real Estate Investors (PREI^®), and the other which owns one data center property with an affiliate of Griffin Capital Essential Asset REIT, Inc. (GCEAR). The following tables present summarized financial information for the joint ventures as of September 30, 2015 and December 31, 2014 and for the nine months ended September 30, 2015 and 2014 (unaudited, in thousands):

	As of September 30, 2015										Nine Months Ended September 30, 2015
2015	Net Investment in Properties		Total Assets		Debt		Total Liabilities		Equity		Revenues		Property Operating Expense			Net Operating Income		Net Income
Total Unconsolidated Joint Ventures	$	763,828	$	939,481	$	460,418	$	558,704	$	380,777	$	96,407	$	(26,431	)	$	69,976	$	28,303
Our investment in and share of equity in earnings of unconsolidated joint ventures									$	103,703								$	12,170
	As of December 31, 2014										Nine Months Ended September 30, 2014
2014	Net Investment in Properties		Total Assets		Debt		Total Liabilities		Equity		Revenues		Property Operating Expense			Net Operating Income		Net Income
Total Unconsolidated Joint Ventures	$	779,752	$	942,107	$	461,548	$	569,895	$	372,212	$	71,882	$	(17,409	)	$	54,473	$	23,350
Our investment in and share of equity in earnings of unconsolidated joint ventures									$	94,729								$	9,513

Prudential Real Estate Investors (PREI ^®) Joint Venture

On March 5, 2014, we contributed the property at 636 Pierce Street in Somerset, New Jersey, which we acquired in December 2013, to our unconsolidated joint venture with the PREI^® fund that was formed in September 2013. The property was valued at approximately $40.4 million and subject to $26.1 million in debt, which the joint venture assumed. The PREI^® fund contributed approximately $11.4 million in cash for their 80% share of the net asset value of $14.3 million. Subsequent to the closing, the joint venture refinanced the existing debt with $23.0 million drawn from the joint venture’s bank facility. Including the refinance costs, the PREI^® fund contributed $17.5 million for the 636 Pierce Street property, bringing their contributed capital in the joint venture to $164.8 million.

The transaction produced a $1.9 million gain for the Company representing the difference between the $11.4 million of cash proceeds received by the Company for its 80% share of the net asset less the Company’s book value.

Griffin Capital Essential Asset REIT, Inc. (GCEAR) Joint Venture

On September 9, 2014, we formed a joint venture with an affiliate of GCEAR. We contributed to the joint venture the property located at 43915 Devin Shafron Drive (Building A) in Ashburn, Virginia, which is a Turn-Key Flex® data center property valued at approximately $185.5 million (excluding approximately $2.1 million of closing costs). GCEAR contributed cash to the joint venture and holds an 80% interest in the joint venture. We retained a 20% interest in the joint venture. The joint venture agreement provides for a current annual preferred return from cash flow first to GCEAR and then to us, after which a portion of any excess cash flows is shared by the partners based on their respective interests and the remaining portion is paid to us as a promote interest. We perform the day-to-day accounting and property management functions for the joint venture and the property and, as such, earn management fees. Although we are the managing member of the joint venture and manage the day-to-day activities, certain major decisions, including approval of annual budgets, require approval of the GCEAR member.

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September 30, 2015 and 2014

Thus, we concluded we do not own a controlling interest and account for our interest in the joint venture as an equity method investment.

The joint venture arranged a $102.0 millionfive-year secured bank loan at LIBOR plus 225 basis points, representing a loan-to-value ratio of approximately 55%. The joint venture entered into an interest rate swap agreement to effectively fix the interest rate on approximately $51.0 million of borrowings under the loan through September 2019.  Twoone-year extensions of the maturity date are available under the loan agreement, which the joint venture may exercise if certain conditions are met. Proceeds from this loan offset the initial cash capital contribution amount required from GCEAR and was used to provide us with a special distribution on account of a portion of the contribution value of the property. The transaction generated approximately $167.5 million of net proceeds to us, comprised of our share of the initial draw-down on the bank loan in addition to GCEAR’s equity contribution, less our share of closing costs. Accordingly we recognized a gain of approximately $93.5 million on the sale of the 80% interest in the joint venture during the three months ended September 30, 2014.

Differences between the Company’s investment in the joint ventures and the amount of the underlying equity in net assets of the joint ventures are due to basis differences resulting from the Company’s equity investment recorded at its historical basis versus the fair value of the Company’s contributed interest in the joint ventures. Our proportionate share of the earnings or losses related to these unconsolidated joint ventures is reflected as equity in earnings of unconsolidated joint ventures on the accompanying consolidated income statements.

5. Acquired Intangible Assets and Liabilities

The following summarizes our acquired intangible assets (acquired in-place lease value and acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of September 30, 2015 and December 31, 2014.

	Balance as of
(Amounts in thousands)	September 30, 2015			December 31, 2014
Acquired in-place lease value:
Gross amount	$	652,629		$	680,419
Accumulated amortization	(460,469		)	(452,739		)
Net	$	192,160		$	227,680
Acquired above-market leases:
Gross amount	$	118,881		$	126,677
Accumulated amortization	(88,264		)	(88,072		)
Net	$	30,617		$	38,605
Acquired below-market leases:
Gross amount	$	278,514		$	282,670
Accumulated amortization	(189,882		)	(178,435		)
Net	$	88,632		$	104,235

Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase to rental revenues of $2.2 million and $2.4 million for the three months ended September 30, 2015 and 2014, respectively, and $6.9 million and $7.7 million for the nine months ended September 30, 2015 and 2014, respectively. The expected average remaining lives for acquired below-market leases and acquired above-market leases is 5.6 years and 3.4 years, respectively, as of September 30, 2015. Estimated annual amortization of acquired below-market leases, net of acquired above-market leases, for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows:

(Amounts in thousands)
Remainder of 2015	$	1,994
2016	7,554
2017	6,143
2018	4,534
2019	4,610
Thereafter	33,180
Total	$	58,015

Amortization of acquired in-place lease value (a component of depreciation and amortization expense) was $10.1 million and $16.5 million for the three months ended September 30, 2015 and 2014, respectively, and $32.2 million and $50.0 million for the nine months ended September 30, 2015 and 2014, respectively. The expected average amortization period for acquired in-place lease value is 6.0 years as of September 30, 2015. The weighted average remaining contractual life for acquired leases excluding renewals or extensions is 4.6 years as of September 30, 2015. Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows:

(Amounts in thousands)
Remainder of 2015	$	8,371
2016	31,893
2017	27,367
2018	25,100
2019	22,600
Thereafter	76,829
Total	$	192,160

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September 30, 2015 and 2014

6. Debt of the Company

In this Note 6, the “Company” refers only to Digital Realty Trust, Inc. and not to any of its subsidiaries.

The Company itself does not currently have any indebtedness. All debt is currently held directly or indirectly by the Operating Partnership.

Guarantee of Debt

The Company guarantees the Operating Partnership’s obligations with respect to its 5.875% notes due 2020 (2020 Notes), 5.250% notes due 2021 (2021 Notes), 3.950% notes due 2022 (3.950% 2022 Notes), 3.625% notes due 2022 (3.625% 2022 Notes) and its unsecured senior notes sold to Prudential Investment Management, Inc. and certain of its affiliates pursuant to the Amended and Restated Note Purchase and Private Shelf Agreement, as amended, which we refer to as the Prudential Shelf Facility. The Company and the Operating Partnership guarantee the obligations of Digital Stout Holding, LLC, a wholly owned subsidiary of the Operating Partnership, with respect to its 4.750% notes due 2023 (2023 Notes) and 4.250% notes due 2025 (2025 Notes). Prior to the completion of the Operating Partnership Merger (as defined in Note 7 "Debt of the Operating Partnership"), the Company and the Operating Partnership guaranteed the obligations of Digital Delta Holdings, LLC, a wholly owned subsidiary of Digital Realty Trust, Inc., with respect to its 3.400% Notes due 2020 (3.400% 2020 Notes) and 4.750% Notes due 2025 (4.750% 2025 Notes). Following the completion of the Operating Partnership Merger, the 3.400% 2020 Notes and 4.750% 2025 Notes became the senior unsecured obligations of the Operating Partnership and remain guaranteed by the Company. The Company is also the guarantor of the Operating Partnership’s and its subsidiary borrowers’ obligations under the global revolving credit facility and unsecured term loan.

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September 30, 2015 and 2014

7. Debt of the Operating Partnership

A summary of outstanding indebtedness of the Operating Partnership as of September 30, 2015 and December 31, 2014 is as follows (in thousands):

Indebtedness	Interest Rate at September 30, 2015		Maturity Date		Principal Outstanding September 30, 2015				Principal Outstanding December 31, 2014
Global revolving credit facility	Various	(1)	Nov 3, 2017		$	688,957		(2)	$	525,951		(2)
Unsecured term loan	Various	(3)(6)	Apr 16, 2017		938,276			(4)	976,600			(4)
Unsecured senior notes:
Prudential Shelf Facility:
Series C	9.680%		Jan 6, 2016		25,000				25,000
Series D	4.570%		Jan 20, 2015		—			(7)	50,000
Series E	5.730%		Jan 20, 2017		50,000				50,000
Series F	4.500%		Feb 3, 2015		—			(7)	17,000
Total Prudential Shelf Facility					75,000				142,000
Senior Notes:
4.50% notes due 2015	4.500%		Jul 15, 2015	(8)	—				375,000
5.875% notes due 2020	5.875%		Feb 1, 2020		500,000				500,000
5.25% notes due 2021	5.250%		Mar 15, 2021		400,000				400,000
3.95% notes due 2022	3.950%		Jul 1, 2022	(9)	500,000				—
3.625% notes due 2022	3.625%		Oct 1, 2022		300,000				300,000
4.75% notes due 2023	4.750%		Oct 13, 2023		453,840			(10)	467,310			(10)
4.25% notes due 2025	4.250%		Jan 17, 2025		605,120			(10)	623,080			(10)
Unamortized discounts					(17,601		)		(15,632		)
Total senior notes, net of discount					2,741,359				2,649,758
Total unsecured senior notes, net of discount					2,816,359				2,791,758

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

Indebtedness	Interest Rate at September 30, 2015	Maturity Date	Principal Outstanding September 30, 2015			Principal Outstanding December 31, 2014
Mortgage loans:
200 Paul Avenue 1-4 (5)	5.74%	Oct 8, 2015	—		(11)	68,665
2045 & 2055 Lafayette Street (5)	5.93%	Feb 6, 2017	61,728			62,563
34551 Ardenwood Boulevard 1-4 (5)	5.95%	Nov 11, 2016	50,700			51,339
1100 Space Park Drive (5)	5.89%	Dec 11, 2016	50,648			51,295
600 West Seventh Street	5.80%	Mar 15, 2016	46,466			47,825
150 South First Street (5)	6.30%	Feb 6, 2017	48,699			49,316
2334 Lundy Place (5)	5.96%	Nov 11, 2016	36,875			37,340
8025 North Interstate 35	4.09%	Mar 6, 2016	5,857			6,057
731 East Trade Street	8.22%	Jul 1, 2020	3,539			3,836
Unamortized net premiums			475			582
Total mortgage loans, including premiums			304,987			378,818
Total indebtedness			$	4,748,579		$	4,673,127

_________________________________ 

(1) The interest rate for borrowings under the global revolving credit facility equals the applicable index plus a margin of 110 basis points, which is based on the current credit ratings of our long-term debt. An annual facility fee of 20 basis points, which is based on the credit ratings of our long-term debt, is due and payable quarterly on the total commitment amount of the facility. Twosix-month extensions are available, which we may exercise if certain conditions are met.

(2) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands):

Denomination of Draw	Balance as of September 30, 2015			Weighted-average interest rate		Balance as of December 31, 2014			Weighted-average interest rate
Floating Rate Borrowing (a)
U.S. dollar ($)	$	50,000		1.29	%	$	90,000		1.27	%
British pound sterling (£)	110,434		(c)	1.62	%	132,716		(d)	1.61	%
Euro (€)	214,822		(c)	1.00	%	58,071		(d)	1.13	%
Australian dollar (AUD)	88,497		(c)	3.15	%	72,676		(d)	3.74	%
Hong Kong dollar (HKD)	88,476		(c)	1.36	%	79,336		(d)	1.34	%
Japanese yen (JPY)	14,265		(c)	1.13	%	13,201		(d)	1.17	%
Singapore dollar (SGD)	46,475		(c)	2.42	%	6,565		(d)	1.64	%
Canadian dollar (CAD)	70,988		(c)	1.86	%	62,386		(d)	2.39	%
Total	$	683,957		1.63	%	$	514,951		1.84	%
Base Rate Borrowing (b)
U.S. dollar ($)	$	5,000		3.35	%	$	11,000		3.35	%
Total borrowings	$	688,957		1.65	%	$	525,951		1.87	%

(a) The interest rates for floating rate borrowings under the global revolving credit facility equal the applicable index plus a margin of 110 basis points, which is based on the credit ratings of our long-term debt.

(b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt.

(c) Based on exchange rates of $1.51 to £1.00, $1.12 to €1.00, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.70 to 1.00 SGD and $0.75 to 1.00 CAD, respectively, as of September 30, 2015.

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September 30, 2015 and 2014

(d) Based on exchange rates of $1.56 to £1.00, $1.21 to €1.00, $0.82 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.75 to 1.00 SGD and $0.86 to 1.00 CAD, respectively, as of December 31, 2014.

(3) Interest rates are based on our current senior unsecured debt ratings and are 120 basis points over the applicable index for floating rate advances. Twosix-month extensions are available, which we may exercise if certain conditions are met.

(4) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands):

Denomination of Draw	Balance as of September 30, 2015			Weighted-average interest rate			Balance as of December 31, 2014			Weighted-average interest rate
U.S. dollar ($)	$	410,905		1.40	%	(b)	$	410,905		1.36	%	(d)
Singapore dollar (SGD)	160,659		(a)	2.08	%	(b)	172,426		(c)	1.45	%	(d)
British pound sterling (£)	182,935		(a)	1.78	%		188,365		(c)	1.76	%
Euro (€)	111,211		(a)	1.20	%		120,375		(c)	1.22	%
Australian dollar (AUD)	72,566		(a)	3.34	%		84,529		(c)	3.98	%
Total	$	938,276		1.72	%	(b)	$	976,600		1.66	%	(d)

(a) Based on exchange rates of $0.70 to 1.00 SGD, $1.51 to £1.00, $1.12 to €1.00 and $0.70 to 1.00 AUD, respectively, as of September 30, 2015.

(b) As of September 30, 2015, the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.16% (Singapore dollar) and 1.94% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps.

(c) Based on exchange rates of $0.75 to 1.00 SGD, $1.56 to £1.00, $1.21 to €1.00 and $0.82 to 1.00 AUD, respectively, as of December 31, 2014.

(d) As of December 31, 2014, the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.01% (Singapore dollar) and 2.00% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps.

(5) The respective borrower’s assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

(6) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by the U.S. dollar and Singapore dollar tranches of the unsecured term loan. See Note 14 "Derivative Instruments" for further information.

(7) These unsecured senior notes were repaid in full at maturity.

(8) On May 26, 2015, the Operating Partnership redeemed the entire outstanding principal amount of its 4.500% Notes due 2015 (2015 Notes), at a redemption price of 100% of the principal amount of the 2015 Notes plus accrued and unpaid interest thereon up to, but excluding, the redemption date.

(9) On June 23, 2015, the Operating Partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum. The purchase price paid by the initial purchasers was 99.236% of the principal amount.

(10) Based on exchange rate of $1.51 to £1.00 as of September 30, 2015 and $1.56 to £1.00 as of December 31, 2014.

(11) This loan was repaid in full in September 2015.

Global Revolving Credit Facility

On August 15, 2013, the Operating Partnership refinanced its global revolving credit facility, increasing its total borrowing capacity to $2.0 billion from $1.8 billion. The global revolving credit facility has an accordion feature that would enable us to increase the borrowing capacity of the credit facility to $2.55 billion, subject to the receipt of lender commitments and other conditions precedent. The refinanced facility matures on November 3, 2017, with twosix-month extension options available. The interest rate for borrowings under the expanded facility equals the applicable index plus a margin which is based on the credit ratings of our long-term debt and is currently 110 basis points. An annual facility fee on the total commitment amount of the facility, based on the credit ratings of our long-term debt, currently 20 basis points, is payable quarterly. Funds may be drawn in U.S., Canadian, Singapore, Australian and Hong Kong dollars, as well as Euro, British pound sterling, Swiss franc, Japanese yen and Mexican peso denominations. As of September 30, 2015, interest rates are based on 1-month LIBOR, 1-month GBP LIBOR, 1-month EURIBOR, 1-month BBR, 1-month HIBOR, 1-month JPY LIBOR, 1-month SOR and 1-month

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September 30, 2015 and 2014

CDOR plus a margin of 1.10%. The facility also bore a base borrowing rate of 3.35% (USD) which is based on U.S. Prime Rate plus a margin of 0.10%. We have used and intend to use available borrowings under the global revolving credit facility to acquire additional properties, to fund development opportunities and for general working capital and other corporate purposes, including potentially for the repurchase, redemption or retirement of outstanding debt or equity securities. As of September 30, 2015, we have capitalized approximately $18.0 million of financing costs related to the global revolving credit facility. As of September 30, 2015, approximately $689.0 million was drawn under the global revolving credit facility and $5.5 million of letters of credit were issued.

The global revolving credit facility contains various restrictive covenants, including limitations on our ability to incur additional indebtedness, make certain investments or merge with another company, and requirements to maintain financial coverage ratios, including with respect to unencumbered assets. In addition, the global revolving credit facility restricts Digital Realty Trust, Inc. from making distributions to its stockholders, or redeeming or otherwise repurchasing shares of its capital stock, after the occurrence and during the continuance of an event of default, except in limited circumstances including as necessary to enable Digital Realty Trust, Inc. to maintain its qualification as a REIT and to minimize the payment of income or excise tax. As of September 30, 2015, we were in compliance with all of such covenants.

Unsecured Term Loan

On August 15, 2013, we refinanced the senior unsecured multi-currency term loan facility, increasing its total borrowing capacity to $1.0 billion from $750.0 million. Pursuant to the accordion feature, total commitments can be increased to $1.1 billion, subject to the receipt of lender commitments and other conditions precedent. The facility matures on April 16, 2017, with twosix-month extension options available. Interest rates are based on our senior unsecured debt ratings and are currently 120 basis points over the applicable index for floating rate advances. Funds may be drawn in U.S., Singapore and Australian dollars, as well as Euro and British pound sterling denominations with the option to add Hong Kong dollars and Japanese yen upon an accordion exercise. Based on exchange rates in effect at September 30, 2015, the balance outstanding is approximately $938.3 million. We have used borrowings under the term loan for acquisitions, repayment of indebtedness, development, working capital and general corporate purposes. The covenants under this loan are consistent with our global revolving credit facility and, as of September 30, 2015, we were in compliance with all of such covenants. As of September 30, 2015, we have capitalized approximately $8.4 million of financing costs related to the unsecured term loan.

3.950% Notes due 2022

On June 23, 2015, the Operating Partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum (the 3.950% 2022 Notes). The public offering price was 99.236% of the principal amount. The 3.950% 2022 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 3.950% 2022 Notes is payable on January 1 and July 1 of each year, beginning on January 1, 2016. The net proceeds from the offering after deducting the original issue discount of approximately $3.8 million and underwriting commissions and expenses of approximately $4.4 million was approximately $491.8 million. The Operating Partnership will use the net proceeds from the offering of the 3.950% 2022 Notes to fund certain eligible green projects, including the development and redevelopment of such projects. Pending such uses, the Operating Partnership temporarily repaid borrowings under its global revolving credit facility. The 3.950% 2022 Notes have been reflected net of discount in the condensed consolidated balance sheet. The indenture governing the 3.950% 2022 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At September 30, 2015, we were in compliance with each of these financial covenants.

3.400% Notes due 2020 and 4.750% Notes due 2025

On October 1, 2015, Digital Delta Holdings, LLC, a Delaware limited liability company and wholly owned subsidiary of Digital Realty Trust, Inc., issued $500.0 million aggregate principal amount of its 3.400% Notes due 2020 (the “3.400% 2020 Notes”) and $450.0 million aggregate principal amount of its 4.750% Notes due 2025 (the “4.750% 2025 Notes” and together with the 3.400% 2020 Notes, the “Delta Holdings Notes”), fully and unconditionally guaranteed by Digital Realty Trust, Inc. and Digital Realty Trust, L.P. The terms of the Delta Holdings Notes are governed by an indenture, dated as of October 1, 2015, by and among Digital Delta Holdings, LLC, as issuer, Digital Realty Trust, Inc. and Digital Realty Trust, L.P., as guarantors, and Wells Fargo Bank, National Association, as trustee. The indenture contains various restrictive covenants, including

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September 30, 2015 and 2014

limitations on the ability of Digital Realty Trust, L.P. and its subsidiaries to incur additional indebtedness and requirements to maintain a pool of unencumbered assets.

Digital Delta Holdings, LLC used the net proceeds from the offering to fund a portion of the aggregate purchase price for the acquisition of Telx Holdings, Inc. (the “Telx Acquisition”).

The purchase price paid by the initial purchasers for the 3.400% 2020 Notes and 4.750% 2025 Notes was 99.777% and 100.000% of the principal amount thereof, respectively. The 3.400% 2020 Notes and 4.750% 2025 Notes bear interest at 3.400% and 4.750% per annum, respectively. Interest is payable on April 1 and October 1 of each year, beginning April 1, 2016, until the respective maturity dates of October 1, 2020 and October 1, 2025.

Pursuant to the terms of the indenture, within five business days following the consummation of the Telx Acquisition, Digital Delta Holdings, LLC was required to merge with and into Digital Realty Trust, L.P., with Digital Realty Trust, L.P. surviving the merger (the “Operating Partnership Merger”) and to assume Digital Delta Holdings, LLC’s obligations under the Delta Holdings Notes and the related indenture and registration rights agreement by operation of law. The Operating Partnership Merger was consummated on October 13, 2015.

Subsequent to the Operating Partnership Merger, the Notes are the Operating Partnership’s senior unsecured obligations and rank equally in right of payment with all of the Operating Partnership’s other unsecured and unsubordinated indebtedness from time to time outstanding. However, the Delta Holdings Notes are effectively subordinated in right of payment to all of the operating partnership’s existing and future secured indebtedness (to the extent of the collateral securing the same) and to all existing and future liabilities and preferred equity of the Operating Partnership’s subsidiaries. Prior to the completion of the Operating Partnership Merger, Digital Realty Trust, Inc. and the Operating Partnership guaranteed the obligations of the Delta Holdings Notes. Following the completion of the Operating Partnership Merger, the Delta Holdings Notes became the senior unsecured obligations of the Operating Partnership and remained guaranteed by Digital Realty Trust, Inc.

The Delta Holdings Notes will be redeemable in whole at any time or in part from time to time, at the Operating Partnership’s option, at a redemption price equal to the sum of:

• an amount equal to 100% of the principal amount of the Delta Holdings Notes to be redeemed plus accrued and unpaid interest up to, but not including, the redemption date; and

• a make-whole premium calculated in accordance with the indenture.

Notwithstanding the foregoing, if any of the 3.400% 2020 Notes are redeemed on or after September 1, 2020 or if any of the 4.750% 2025 Notes are redeemed on or after July 1, 2025, the redemption price will not include a make-whole premium.

Due to Parent Company

On August 24, 2015, Digital Realty Trust, Inc. completed an underwritten public offering of 10,000,000 shares of 6.350% Series I Cumulative Redeemable Preferred Stock (the "Series I Preferred Stock"), for net proceeds of approximately $242.7 million after deducting the underwriting discount. Digital Realty Trust, Inc. used the net proceeds from the offering to fund a portion of the aggregate purchase price for the Telx Acquisition. Pending the closing of the Telx Acquisition, Digital Realty Trust, Inc. loaned the net proceeds from the Series I Preferred Stock offering of approximately $242.7 million to the Operating Partnership.  The intercompany note was scheduled to mature on January 11, 2016 with an interest rate of 4.50% per annum.  As of September 30, 2015, the full amount of the intercompany note was outstanding and approximately $1.2 million of accrued interest was recorded during the three months ended September 30, 2015.  On October 8, 2015, the Operating Partnership repaid the intercompany note in full, with accrued interest, in the amount of $244.1 million.  On October 13, 2015, in connection with the consummation of the Operating Partnership Merger, the Operating Partnership issued to Digital Realty Trust, Inc. 10,000,000 series I cumulative redeemable preferred units with substantially identical terms as the Series I Preferred Stock.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

The table below summarizes our debt maturities and principal payments as of September 30, 2015 (in thousands):

	Global Revolving Credit Facility(1)		Unsecured Term Loan (1)		Prudential Shelf Facility		Senior Notes			Mortgage Loans		Total Debt
Remainder of 2015	$	—	$	—	$	—	$	—		$	1,768	$	1,768
2016	—		—		25,000		—			191,979		216,979
2017	688,957		938,276		50,000		—			108,395		1,785,628
2018	—		—		—		—			593		593
2019	—		—		—		—			644		644
Thereafter	—		—		—		2,758,960			1,133		2,760,093
Subtotal	$	688,957	$	938,276	$	75,000	$	2,758,960		$	304,512	$	4,765,705
Unamortized discount	—		—		—		(17,601		)	—		(17,601		)
Unamortized premium	—		—		—		—			475		475
Total	$	688,957	$	938,276	$	75,000	$	2,741,359		$	304,987	$	4,748,579

(1) Subject to twosix-month extension options exercisable by us. The bank group is obligated to grant the extension options provided we give proper notice, we make certain representations and warranties and no default exists under the global revolving credit facility and the unsecured term loan, as applicable.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

8. Income per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income available to common stockholders	$	38,522	$	109,314	$	257,305	$	185,010
Weighted average shares outstanding—basic	135,832,503		135,492,618		135,782,831		132,635,894
Potentially dilutive common shares:
Stock options	19,983		52,629		20,629		46,649
Unvested incentive units	86,190		129,024		65,752		61,122
Series I Cumulative Redeemable Preferred Stock	1,703,182		—		567,727		—
Market performance-based awards	618,078		272,262		483,538		109,301
Weighted average shares outstanding—diluted	138,259,936		135,946,533		136,920,477		132,852,966
Income per share:
Basic	$	0.28	$	0.81	$	1.89	$	1.39
Diluted	$	0.28	$	0.80	$	1.88	$	1.39

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,635,444	2,815,512	2,698,215	2,745,730
Potentially dilutive 2029 Debentures	—	—	—	2,617,790
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	4,567,661	4,673,322	4,440,429	5,136,112
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	2,896,800	2,963,810	2,816,110	3,257,310
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	3,960,900	4,052,525	3,850,569	4,453,839
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	5,804,286	5,938,553	5,642,608	4,111,306
Shares subject to Forward Equity Offering	10,500,000	—	10,500,000	—
	30,365,091	20,443,722	29,947,931	22,322,087

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

9. Income per Unit

The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income available to common unitholders	$	38,116	$	111,586	$	261,302	$	188,848
Weighted average units outstanding—basic	138,467,947		138,308,130		138,481,046		135,381,624
Potentially dilutive common units:
Stock options	19,983		52,629		20,629		46,649
Unvested incentive units	86,190		129,024		65,752		61,122
Market performance-based awards	618,078		272,262		483,538		109,301
Weighted average units outstanding—diluted	139,192,198		138,762,045		139,050,965		135,598,696
Income per unit:
Basic	$	0.28	$	0.81	$	1.89	$	1.39
Diluted	$	0.27	$	0.80	$	1.88	$	1.39

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Potentially dilutive 2029 Debentures	—	1,121,910	—	3,948,379
Potentially dilutive Series E Cumulative Redeemable Preferred Units	4,567,661	5,060,744	4,440,429	5,367,507
Potentially dilutive Series F Cumulative Redeemable Preferred Units	2,896,800	3,209,512	2,816,110	3,404,060
Potentially dilutive Series G Cumulative Redeemable Preferred Units	3,960,900	4,388,483	3,850,569	4,654,496
Potentially dilutive Series H Cumulative Redeemable Preferred Units	5,804,286	6,437,332	5,642,608	3,449,841
Units subject to Forward Equity Offering	10,500,000	—	10,500,000	—
	27,729,647	20,217,981	27,249,716	20,824,283

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September 30, 2015 and 2014

10. Income Taxes

Digital Realty Trust, Inc. has elected to be treated and believes that it has been organized and has operated in a manner that has enabled it to qualify as a REIT for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. is generally not subject to corporate level federal income taxes on earnings distributed currently to its stockholders. Since inception, Digital Realty Trust, Inc. has distributed at least 100% of its taxable income annually and intends to do so for the tax year ending December 31, 2015. As such, no provision for federal income taxes has been included in the accompanying condensed consolidated financial statements for the three and nine months ended September 30, 2015 and 2014.

The Operating Partnership is a partnership and is not required to pay federal income tax. Instead, taxable income is allocated to its partners, who include such amounts on their federal income tax returns. As such, no provision for federal income taxes has been included in the Operating Partnership’s accompanying condensed consolidated financial statements.

We have elected taxable REIT subsidiary (“TRS”) status for some of our consolidated subsidiaries. In general, a TRS may provide services that would otherwise be considered impermissible for REITs to provide and may hold assets that REITs cannot hold directly. Income taxes for TRS entities were accrued, as necessary, for the three and nine months ended September 30, 2015 and 2014.

For our TRS entities and foreign subsidiaries that are subject to U.S. federal, state and foreign income taxes, deferred tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted tax rates expected to be in effect when the temporary differences reverse. A valuation allowance for deferred tax assets is provided if we believe it is more likely than not that the deferred tax asset may not be realized, based on available evidence at the time the determination is made. An increase or decrease in the valuation allowance that results from the change in circumstances that causes a change in our judgment about the realizability of the related deferred tax asset is included in the income statement. Deferred tax assets (net of valuation allowance) and liabilities for our TRS entities and foreign subsidiaries were accrued, as necessary, for the three and nine months ended September 30, 2015 and 2014. As of September 30, 2015, we had deferred tax liabilities, net of deferred tax assets, of approximately $135.4 million primarily related to our foreign properties. The majority of our net deferred tax liability relates to differences between tax basis and book basis of the assets acquired in the Sentrum Portfolio acquisition during 2012.

11. Equity and Accumulated Other Comprehensive Income, Net

(a) Equity Distribution Agreements

Digital Realty Trust, Inc. entered into equity distribution agreements in June 2011, which we refer to as the 2011 Equity Distribution Agreements, with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC, or the Agents, under which it can issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Agents as its sales agents. The sales of common stock made under the 2011 Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act. Cumulatively through September 30, 2015, Digital Realty Trust, Inc. has generated net proceeds of approximately $342.7 million from the issuance of approximately 5.7 million common shares under the 2011 Equity Distribution Agreements at an average price of $60.35 per share after payment of approximately $3.5 million of commissions to the sales agents and before offering expenses. No sales were made under the program during the nine months ended September 30, 2015 and 2014. As of September 30, 2015, shares of common stock having an aggregate offering price of $53.8 million remained available for offer and sale under the program.

(b) Forward Equity Sale

On July 20, 2015, Digital Realty Trust, Inc. completed an underwritten public offering of 10,500,000 shares of its common stock, all of which were offered in connection with forward sale agreements it entered into with certain financial institutions acting as forward purchasers. The forward purchasers borrowed and sold 10,500,000 shares of Digital Realty Trust, Inc.’s common stock in the public offering.

Digital Realty Trust, Inc. did not receive any proceeds from the sale of our common stock by the forward purchasers in the public offering. On October 8, 2015, Digital Realty Trust, Inc. physically settled in full the forward sale agreements by issuing an aggregate of 10,500,000 shares of its common stock to the forward counterparties in exchange for net proceeds of

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September 30, 2015 and 2014

approximately $674.1 million. Digital Realty Trust, Inc. used the net proceeds from the physical settlement of the forward sale agreements to fund a portion of the Telx Acquisition.

(c) Redeemable Preferred Stock

6.350% Series I Cumulative Redeemable Preferred Stock

On August 24, 2015, Digital Realty Trust, Inc. issued 10,000,000 shares of its 6.350% series I cumulative redeemable preferred stock (the "Series I Preferred Stock") for net proceeds of approximately $241.7 million. We used the net proceeds from the offering to fund a portion of the aggregate purchase price for the Telx Acquisition. Prior to the closing of the Telx Acquisition, we loaned the net proceeds from the offering to the Operating Partnership. Dividends are cumulative on the Series I Preferred Stock from the date of original issuance in the amount of $1.5875 per share each year, which is equivalent to 6.350% of the $25.00 liquidation preference per share. Dividends on the Series I Preferred Stock are payable quarterly in arrears. The first dividend payable on the Series I Preferred Stock on December 31, 2015 will be a pro rata dividend from and including the original issue date to and including December 31, 2015 in the amount of $0.56003 per share. The Series I Preferred Stock does not have a stated maturity date and is not subject to any sinking fund or mandatory redemption provisions. Upon liquidation, dissolution or winding up, the Series I Preferred Stock will rank senior to Digital Realty Trust, Inc. common stock and rank on parity with Digital Realty Trust, Inc.’s series E cumulative redeemable preferred stock, series F cumulative redeemable preferred stock, series G cumulative redeemable preferred stock and series H cumulative redeemable preferred stock with respect to the payment of distributions and other amounts. Digital Realty Trust, Inc. is not allowed to redeem the Series I Preferred Stock before August 24, 2020, except in limited circumstances to preserve its status as a REIT. On or after August 24, 2020, Digital Realty Trust, Inc. may, at its option, redeem the Series I Preferred Stock, in whole or in part, at any time or from time to time, for cash at a redemption price of $25.00 per share, plus all accrued and unpaid dividends on such Series I Preferred Stock up to but excluding the redemption date. Holders of the Series I Preferred Stock generally have no voting rights except for limited voting rights if Digital Realty Trust, Inc. fails to pay dividends for six or more quarterly periods (whether or not consecutive) and in certain other circumstances. Upon the occurrence of specified changes of control, as a result of which neither Digital Realty Trust, Inc.’s common stock nor the common securities of the acquiring or surviving entity (or American Depositary Receipts representing such securities) is listed on the New York Stock Exchange, the NYSE MKT, LLC or the NASDAQ Stock Market or listed or quoted on a successor exchange or quotation system, each holder of Series I Preferred Stock will have the right (unless, prior to the change of control conversion date specified in the Articles Supplementary governing the Series I Preferred Stock, Digital Realty Trust, Inc. has provided or provides notice of its election to redeem the Series I Preferred Stock) to convert some or all of the Series I Preferred Stock held by it into a number of shares of Digital Realty Trust, Inc.’s common stock per share of Series I Preferred Stock to be converted equal to the lesser of:

the quotient obtained by dividing (i) the sum of the $25.00 liquidation preference plus the amount of any accrued and unpaid dividends to, but not including, the change of control conversion date (unless the change of control conversion date is after a record date for a Series I Preferred Stock dividend payment and prior to the corresponding Series I Preferred Stock dividend payment date, in which case no additional amount for such accrued and unpaid dividend will be included in this sum) by (ii) the common stock price specified in the Articles Supplementary governing the Series I Preferred Stock; and 0.76231, or the share cap, subject to certain adjustments;

subject, in each case, to provisions for the receipt of alternative consideration as described in the Articles Supplementary governing the Series I Preferred Stock. Except in connection with specified change of control transactions, the Series I Preferred Stock is not convertible into or exchangeable for any other property or securities of Digital Realty Trust, Inc.

(d) Noncontrolling Interests in Operating Partnership

Noncontrolling interests in the Operating Partnership relate to the interests that are not owned by Digital Realty Trust, Inc. The following table shows the ownership interests in the Operating Partnership as of September 30, 2015 and December 31, 2014:

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

	September 30, 2015			December 31, 2014
	Number of units	Percentage of total		Number of units	Percentage of total
Digital Realty Trust, Inc.	135,843,684	98.0	%	135,626,255	97.8	%
Noncontrolling interests consist of:
Common units held by third parties	1,421,314	1.0		1,463,814	1.1
Incentive units held by employees and directors (see Note 13)	1,414,299	1.0		1,549,847	1.1
	138,679,297	100.0	%	138,639,916	100.0	%

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of Digital Realty Trust, Inc. common stock at the time of redemption. Alternatively, Digital Realty Trust, Inc. may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, Digital Realty Trust, Inc. evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the noncontrolling Operating Partnership common and incentive units. Based on the results of this analysis, we concluded that the common and incentive Operating Partnership units met the criteria to be classified within equity.

The redemption value of the noncontrolling Operating Partnership common units and the vested incentive units was approximately $170.5 million and $179.0 million based on the closing market price of Digital Realty Trust, Inc. common stock on September 30, 2015 and December 31, 2014, respectively.

The following table shows activity for the noncontrolling interests in the Operating Partnership for the nine months ended September 30, 2015:

	Common Units		Incentive Units		Total
As of December 31, 2014	1,463,814		1,549,847		3,013,661
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1)	(42,500	)	—		(42,500	)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1)	—		(76,087	)	(76,087	)
Cancellation of incentive units held by employees and directors	—		(150,140	)	(150,140	)
Grant of incentive units to employees and directors	—		90,679		90,679
As of September 30, 2015	1,421,314		1,414,299		2,835,613

(1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.

(e) Dividends

We have declared and paid the following dividends on our common and preferred stock for the nine months ended September 30, 2015 (in thousands, except per share data):

Date dividend declared	Dividend payment date	Series E Preferred Stock		Series F Preferred Stock		Series G Preferred Stock		Series H Preferred Stock		Common Stock
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	115,419
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		115,458
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		115,454
		$	15,093	$	9,069	$	11,016	$	20,190	$	346,331
Annual rate of dividend per share		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

Distributions out of Digital Realty Trust, Inc.’s current or accumulated earnings and profits are generally classified as dividends whereas distributions in excess of its current and accumulated earnings and profits, to the extent of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock, are generally classified as a return of capital. Distributions in excess of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock are generally characterized as capital gain. Cash provided by operating activities has generally been sufficient to fund all distributions; however, in the future we may also need to utilize borrowings under the global revolving credit facility to fund all or a portion of distributions.

(f) Accumulated Other Comprehensive Income, Net

The accumulated balances for each item within other comprehensive income, net are as follows (in thousands):

	Foreign currency translation adjustments				Cash flow hedge adjustments			Accumulated other comprehensive income (loss), net
Balance as of December 31, 2014	$	(39,567	)		$	(5,479	)	$	(45,046	)
Net current period change	(40,688		)	(1)	(4,290		)	(44,978		)
Reclassification to interest expense from interest rate swaps	—				2,036			2,036
Balance as of September 30, 2015	$	(80,255	)		$	(7,733	)	$	(87,988	)

(1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

12. Capital and Accumulated Other Comprehensive Income

(a) Allocations of Net Income and Net Losses to Partners

Except for special allocations to holders of profits interest units described below in Note 13 “Incentive Plan—Long-Term Incentive Units,” the Operating Partnership’s net income will generally be allocated to the General Partner to the extent of the accrued preferred return on its preferred units, and then to the General Partner and the Operating Partnership’s limited partners in accordance with the respective percentage interests in the common units issued by the Operating Partnership. Net loss will generally be allocated to the General Partner and the Operating Partnership’s limited partners in accordance with the respective common percentage interests in the Operating Partnership until the limited partner’s capital is reduced to zero and any remaining net loss would be allocated to the General Partner. However, in some cases, losses may be disproportionately allocated to partners who have guaranteed our debt. The allocations described above are subject to special allocations relating to depreciation deductions and to compliance with the provisions of Sections 704(b) and 704(c) of the Code, and the associated Treasury Regulations.

(b) Partnership Units

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of the General Partner’s common stock at the time of redemption. Alternatively, the General Partner may elect to acquire those common units in exchange for shares of the General Partner’s common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, the Operating Partnership evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the limited partners’ common units and the vested incentive units. Based on the results of this analysis, the Operating Partnership concluded that the common and vested incentive Operating Partnership units met the criteria to be classified within capital.

The redemption value of the limited partners’ common units and the vested incentive units was approximately $170.5 million and $179.0 million based on the closing market price of Digital Realty Trust, Inc.’s common stock on September 30, 2015 and December 31, 2014, respectively.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

(c) Distributions

All distributions on the Operating Partnership’s units are at the discretion of Digital Realty Trust, Inc.’s board of directors. The Operating Partnership has declared and paid the following distributions on its common and preferred units for the nine months ended September 30, 2015 (in thousands, except for per unit data):

Date distribution declared	Distribution payment date	Series E Preferred Units		Series F Preferred Units		Series G Preferred Units		Series H Preferred Units		Common Units
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	117,896
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		117,938
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		117,962
		$	15,093	$	9,069	$	11,016	$	20,190	$	353,796
Annual rate of distribution per unit		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

(d) Accumulated Other Comprehensive Income

The accumulated balances for each item within other comprehensive income are as follows (in thousands):

	Foreign currency translation adjustments				Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance as of December 31, 2014	$	(42,138	)		$	(6,295	)	$	(48,433	)
Net current period change	(41,480		)	(1)	(4,374		)	(45,854		)
Reclassification to interest expense from interest rate swaps	—				2,077			2,077
Balance as of September 30, 2015	$	(83,618	)		$	(8,592	)	$	(92,210	)

(1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

13. Incentive Plan

Our Amended and Restated 2004 Incentive Award Plan (as defined below) previously provided for the grant of incentive awards to employees, directors and consultants. Awards issuable under the Amended and Restated 2004 Incentive Award Plan included stock options, restricted stock, dividend equivalents, stock appreciation rights, long-term incentive units, cash performance bonuses and other incentive awards. Only employees were eligible to receive incentive stock options under the Amended and Restated 2004 Incentive Award Plan. Initially, we had reserved a total of 4,474,102 shares of common stock for issuance pursuant to the Digital Realty Trust, Inc., Digital Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (the 2004 Incentive Award Plan), subject to certain adjustments set forth in the 2004 Incentive Award Plan. On May 2, 2007, Digital Realty Trust, Inc.’s stockholders approved the First Amended and Restated Digital Realty Trust, Inc., Digital Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (as amended, the Amended and Restated 2004 Incentive Award Plan). The Amended and Restated 2004 Incentive Award Plan increased the aggregate number of shares of stock which could have been issued or transferred under the plan by 5,000,000 shares to a total of 9,474,102 shares, and provided that the maximum number of shares of stock with respect to awards granted to any one participant during a calendar year was 1,500,000 shares and the maximum amount that could have been paid in cash during any calendar year with respect to any performance-based award not denominated in stock or otherwise for which the foregoing limitation would not be an effective limitation for purposes of Section 162(m) of the Code was $10.0 million.

On April 28, 2014, Digital Realty Trust, Inc. held its 2014 Annual Meeting of Stockholders, or the 2014 Annual Meeting, at which the Company’s stockholders approved the Digital Realty Trust, Inc., Digital Services, Inc., and Digital Realty Trust, L.P. 2014 Incentive Award Plan (as amended, the 2014 Incentive Award Plan), which had been previously adopted by the Board of Directors and recommended to the stockholders for approval by the Company’s Board of Directors. The 2014 Incentive Award

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

Plan became effective and replaced the Amended and Restated 2004 Incentive Award Plan as of the date of such stockholder approval. The material features of the 2014 Incentive Award Plan are described in our definitive Proxy Statement filed on March 19, 2014 in connection with the 2014 Annual Meeting, which description is incorporated herein by reference.

As of September 30, 2015, 4,775,319 shares of common stock or awards convertible into or exchangeable for common stock remained available for future issuance under the 2014 Incentive Award Plan. Each long-term incentive unit and Class D Unit issued under the 2014 Incentive Award Plan counts as one share of common stock for purposes of calculating the limit on shares that may be issued under the 2014 Incentive Award Plan and the individual award limits set forth therein.

(a) Long-Term Incentive Units

Long-term incentive units, which are also referred to as profits interest units, may be issued to eligible participants for the performance of services to or for the benefit of the Operating Partnership. Long-term incentive units (other than Class D Units), whether vested or not, will receive the same quarterly per unit distributions as Operating Partnership common units, which equal per share distributions on Digital Realty Trust, Inc. common stock. Initially, long-term incentive units do not have full parity with common units with respect to liquidating distributions. If such parity is reached, vested long-term incentive units may be converted into an equal number of common units of the Operating Partnership at any time, and thereafter enjoy all the rights of common units of the Operating Partnership, including redemption rights. For a discussion of how long-term incentive units reach parity with common units, see note 13(a) to our consolidated financial statements for the fiscal year ended December 31, 2014, included in our Annual Report on 10-K for the year ended December 31, 2014.

Below is a summary of our long-term incentive unit activity for the nine months ended September 30, 2015.

Unvested Long-term Incentive Units	Units		Weighted-Average Grant Date Fair Value
Unvested, beginning of period	314,415		$	59.34
Granted	90,679		64.79
Vested	(157,300	)	60.25
Cancelled or expired	(22,496	)	58.13
Unvested, end of period	225,298		61.03

The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock on the grant date, are being expensed on a straight-line basis for service awards over four years, the current vesting period of the long-term incentive units.

Excluding the impact of our former Chief Executive Officer's equity acceleration in 2014 and subsequent cancellation in 2015, the expense recorded for the three months ended September 30, 2015 and 2014 related to long-term incentive units was approximately $1.5 million and $1.5 million, respectively, and approximately $4.6 million and $5.2 million for the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.0 million and $0.3 million for the three months ended September 30, 2015 and 2014, respectively, and approximately $1.1 million and $1.1 million for the nine months ended September 30, 2015 and 2014, respectively. Unearned compensation representing the unvested portion of the long-term incentive units totaled $8.7 million and $9.3 million as of September 30, 2015 and December 31, 2014, respectively. We expect to recognize this unearned compensation over the next 2.3 years on a weighted-average basis.

(b) Market Performance-Based Awards

During the nine months ended September 30, 2015 and 2014, the Compensation Committee of the Board of Directors of the Company approved the grant of market performance-based Class D Units of the Operating Partnership and market performance-based restricted stock units, or RSUs, covering shares of the Company’s common stock (collectively, the “awards”), under the Amended and Restated 2004 Incentive Award Plan and 2014 Incentive Plan, respectively, to officers and employees of the Company.

The awards, which were determined to contain a market condition, utilize total shareholder return, or TSR, over a three-year measurement period as the market performance metric. Awards will vest based on the Company’s TSR relative to the MSCI US REIT Index, or RMS, over a three-year market performance period, or the Market Performance Period, commencing in January 2014 or January 2015, as applicable (or, if earlier, ending on the date on which a change in control of the Company occurs),

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

subject to continued services. Vesting with respect to the market condition is measured based on the difference between the Company’s TSR percentage and the TSR percentage of the RMS, or the RMS Relative Market Performance. In the event that the RMS Relative Market Performance during the Market Performance Period is achieved at the “threshold,” “target” or “high” level as set forth below, the awards will become vested as to the market condition with respect to the percentage of Class D units or RSUs, as applicable, set forth below:

Level	RMS Relative Market Performance (2014 Awards)	RMS Relative Market Performance (2015 Awards)	Market Performance Vesting Percentage
Below Threshold Level	< 0 basis points	< -300 basis points	0	%
Threshold Level	0 basis points	-300 basis points	25	%
Target Level	325 basis points	100 basis points	50	%
High Level	> 650 basis points	> 500 basis points	100	%

If the RMS Relative Market Performance falls between the levels specified above, the percentage of the award that will vest with respect to the market condition will be determined using straight-line linear interpolation between such levels.

Following the completion of the Market Performance Period, the 2014 awards that have satisfied the market condition, if any, will vest 50% on February 27, 2017 and 50% on February 27, 2018, subject to continued employment through each applicable vesting date. Following the completion of the Market Performance Period, the 2015 awards that have satisfied the market condition, if any, will vest 50% on February 27, 2018 and 50% on February 27, 2019, subject to continued employment through each applicable vesting date.

Service-based vesting will be accelerated, in full or on a pro rata basis, in the event of a change in control, termination of employment by the Company without cause, or termination of employment by the award recipient for good reason, death, disability or retirement, in any case prior to the completion of the Market Performance Period. However, vesting with respect to the market condition will continue to be measured based on RMS Relative Market Performance during the three-year Market Performance Period (or, in the case of a change in control, shortened Market Performance Period).

The fair values of the 2014 awards and 2015 awards were measured using a Monte Carlo simulation to estimate the probability of the market vesting condition being satisfied. The Company’s achievement of the market vesting condition is contingent on its TSR over a three-year market performance period, relative to the total shareholder return of the RMS. The Monte Carlo simulation is a probabilistic technique based on the underlying theory of the Black-Scholes formula, which was run for 100,000 trials to determine the fair value of the awards. For each trial, the payoff to an award is calculated at the settlement date and is then discounted to the grant date at a risk-free interest rate. The total expected value of the awards on the grant date was determined by multiplying the average value per award over all trials by the number of awards granted. Assumptions used in the 2014 valuation include expected stock price volatility of 33 percent and a risk-free interest rate of 0.67 percent. Assumptions used in the 2015 valuation include expected stock price volatility of 24 percent and a risk-free interest rate of 1.00 percent. The valuations were performed in a risk-neutral framework, so no assumption was made with respect to an equity risk premium.

As of September 30, 2015, 1,148,991 Class D Units and 368,878 market performance-based RSUs had been awarded to our executive officers and other employees. The number of units granted reflects the maximum number of Class D units or market performance-based RSUs, as applicable, which will become vested assuming the achievement of the highest level of RMS Relative Market Performance under the awards and, in the case of the Class D units, also includes dividend equivalent units. The fair value of these awards of approximately $34.3 million will be recognized as compensation expense on a straight-line basis over the expected service period of approximately four years. The unearned compensation as of September 30, 2015 and December 31, 2014 was $18.9 million and $9.5 million, respectively, net of cancellations. As of September 30, 2015, none of the above awards had vested. We recognized compensation expense related to these awards of approximately $2.1 million and $0.8 million in the three months ended September 30, 2015 and 2014, respectively, and approximately $5.4 million and $2.2 million in the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation expense of employees directly engaged in construction and leasing activities of approximately $2.5 million and $0.4 million for the three months ended September 30, 2015 and 2014, respectively, and approximately $3.6 million and $1.0 million for the

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

nine months ended September 30, 2015 and 2014, respectively. If the market conditions are not met, at the end of the applicable performance periods, the unamortized amount will be recognized as an expense at that time.

(c) Stock Options

The following table summarizes the Amended and Restated 2004 Incentive Award Plan’s stock option activity for the nine-month period ended September 30, 2015:

	Period Ended September 30, 2015
	Shares		Weighted average exercise price
Options outstanding, beginning of period	80,933		$	37.25
Exercised	(26,961	)	29.61
Options outstanding, end of period	53,972		$	41.07
Exercisable, end of period	53,972		$	41.07

The following table summarizes information about stock options outstanding and exercisable as of September 30, 2015:

Options outstanding and exercisable
Exercise price	Number outstanding	Weighted-average remaining contractual  life (years)	Weighted-average exercise price		Aggregate intrinsic value
$33.18	4,175	1.09	33.18		$	134,185
$41.73	49,797	1.59	41.73		1,174,711
Total / Weighted-average	53,972	1.55	$	41.07	$	1,308,896

(d) Restricted Stock

Below is a summary of our restricted stock activity for the nine months ended September 30, 2015.

Unvested Restricted Stock	Shares		Weighted-Average Grant Date Fair Value
Unvested, beginning of period	302,298		$	57.10
Granted	105,165		66.65
Vested	(90,871	)	59.48
Cancelled or expired	(33,284	)	57.16
Unvested, end of period	283,308		61.25

The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock on the grant date, are being expensed on a straight-line basis for service awards over the vesting period of the restricted stock, which ranges from three to four years.

The expense recorded for the three months ended September 30, 2015 and 2014 related to grants of restricted stock was approximately $0.7 million and $0.4 million, respectively, and approximately $1.8 million and $1.9 million for the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.6 million and $0.4 million for the three months ended September 30, 2015 and 2014, respectively, and approximately $2.1 million and $2.0 million for the nine months ended September 30, 2015 and 2014, respectively. Unearned compensation representing the unvested portion of the restricted stock totaled $11.9 million and $10.4 million as of September 30, 2015 and December 31, 2014, respectively. We expect to recognize this unearned compensation over the next 2.6 years on a weighted-average basis.

14. Derivative Instruments

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

Currently, we use interest rate swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.

To comply with the provisions of fair value accounting guidance, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, as of September 30, 2015, we have assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and have determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. We do not have any fair value measurements on a recurring basis using significant unobservable inputs (Level 3) as of September 30, 2015 or December 31, 2014.

As of September 30, 2015 and December 31, 2014, we had the following outstanding interest rate derivatives that were designated as effective cash flow hedges of interest rate risk (in thousands):

Notional Amount										Fair Value at Significant Other Observable Inputs (Level 2)
As of September 30, 2015			As of December 31, 2014			Type of Derivative	Strike Rate	Effective Date	Expiration Date	As of September 30, 2015			As of December 31, 2014
Currently-paying contracts
$	335,905	(1)	$	410,905	(1)	Swap	0.717	Various	Various	$	(1,502	)	$	(241	)
133,237		(2)	142,965		(2)	Swap	0.925	July 17, 2012	April 18, 2017	1,435			669
469,142			553,870							(67		)	428
Forward-starting contracts
—		(3)	150,000			Forward-starting Swap	2.091	July 15, 2014	July 15, 2019	—			(2,837		)
Total
$	469,142		$	703,870						$	(67	)	$	(2,409	)

(1) Represents the U.S. dollar tranche of the unsecured term loan.

(2) Represents a portion of the Singapore dollar tranche of the unsecured term loan. Translation to U.S. dollars is based on exchange rate of $0.70 to 1.00 SGD as of September 30, 2015 and $0.75 to 1.00 SGD as of December 31, 2014.

(3) In January 2014, we entered into a forward-starting five-year swap contract to protect against adverse fluctuations in interest rates by reducing our exposure to variability in cash flows relating to interest payments on a forecasted issuance of debt. The accrual period of the swap contract was designed to match the tenor of the planned debt issuance. In the fourth quarter of 2014, changes in the forecasted transaction resulted in the discontinuation of cash flow hedge accounting. As such, changes in the fair value of the forward starting swap were recognized in earnings, within the other income (expense) line item. During the three months ended March 31, 2015, the total net loss recognized on the forward starting swap was approximately $1.6 million, and on January 13, 2015, we cash settled the forward starting swap for approximately $5.7 million, including accrued interest.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

As of September 30, 2015, we estimate that an additional $1.9 million will be reclassified as an increase to interest expense during the twelve months ended September 30, 2016, when the hedged forecasted transactions impact earnings.

15. Fair Value of Instruments

We disclose fair value information about all financial instruments, whether or not recognized in the condensed consolidated balance sheets, for which it is practicable to estimate fair value. Current accounting guidance requires the Company to disclose fair value information about all financial instruments, whether or not recognized in the balance sheets, for which it is practicable to estimate fair value.

The Company’s disclosures of estimated fair value of financial instruments at September 30, 2015 and December 31, 2014 were determined using available market information and appropriate valuation methods. Considerable judgment is necessary to interpret market data and develop estimated fair value. The use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts.

The carrying amounts for cash and cash equivalents, restricted cash, accounts and other receivables, accounts payable and other accrued liabilities, accrued dividends and distributions, security deposits and prepaid rents approximate fair value because of the short-term nature of these instruments. As described in Note 14 "Derivative Instruments", the interest rate swaps are recorded at fair value.

We calculate the fair value of our mortgage loans, unsecured term loan, unsecured senior notes and exchangeable senior debentures based on currently available market rates assuming the loans are outstanding through maturity and considering the collateral and other loan terms. In determining the current market rate for fixed rate debt, a market spread is added to the quoted yields on federal government treasury securities with similar maturity dates to our debt. The carrying value of our global revolving credit facility approximates fair value, due to the variability of interest rates.

As of September 30, 2015 and December 31, 2014, the aggregate estimated fair value and carrying value of our global revolving credit facility, unsecured term loan, unsecured senior notes and mortgage loans were as follows (in thousands):

	Categorization under the fair value hierarchy	As of September 30, 2015				As of December 31, 2014
		Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value
Global revolving credit facility (1)	Level 2	$	688,957	$	688,957	$	525,951	$	525,951
Unsecured term loan (2)	Level 2	938,276		938,276		976,600		976,600
Unsecured senior notes (3)(4)	Level 2	2,963,204		2,816,359		2,968,073		2,791,758
Mortgage loans (3)	Level 2	319,222		304,987		399,569		378,818
		$	4,909,659	$	4,748,579	$	4,870,193	$	4,673,127

(1) The carrying value of our global revolving credit facility approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings.

(2) The carrying value of our unsecured term loan approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings.

(3) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2020 Notes, 2021 Notes, 3.950% 2022 Notes, 3.625% 2022 Notes, 2023 Notes and 2025 Notes are valued based on quoted market prices.

(4) The carrying value of the 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 2023 Notes and 2025 Notes are net of discount of $17,601 and $15,632 in the aggregate as of September 30, 2015 and December 31, 2014, respectively.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

16. Commitments and Contingencies

(a) Contingent liabilities

As part of the acquisition of 29A International Business Park, an asset acquisition in 2010, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined in the agreements for the acquisition. As of December 31, 2014, certain leases executed subsequent to the acquisition caused an amount to become probable of payment and therefore approximately $12.4 million had been accrued in accounts payable and accrued liabilities and capitalized to buildings and improvements in the condensed consolidated balance sheet as of December 31, 2014 and an earnout payment was made during the three months ended June 30, 2015 in the amount of $17.5 million SGD (or approximately $13.0 million based on the exchange rate on the date of payment). As of September 30, 2015, $18.9 million had been accrued and capitalized for additional earnout payments. The second and third tranches of the earnout payments are forecasted to be made in 2016 and 2020, respectively. The maximum amount that could be earned by the seller is $50.0 million SGD (or approximately $35.2 million based on the exchange rate as of September 30, 2015). The earnout contingency expires in November 2020.

One of the tenants at our Convergence Business Park property has an option to expand as part of their lease agreement, which expires in April 2017. As part of this option, development activities were not permitted on specifically identified expansion space within the property until April 2014. From April 2014 through April 2017, the tenant has the right of first refusal on any third party’s bona fide offer to buy the adjacent land. If the tenant exercises their option, we may either construct and lease to the tenant an additional shell building on the expansion space at a stipulated rate of return on cost or sell the existing building and the expansion space to the tenant for a price of approximately $24.0 million and $225,000 per square acre, respectively, plus additional adjustments as provided in the lease.

As part of the acquisition of the Sentrum Portfolio in July 2012, the seller could earn additional consideration based on future net returns on vacant space to be developed, but not currently leased, as defined in the purchase agreement for the acquisition. The initial estimate of fair value of contingent consideration was approximately £56.5 million (or approximately $87.6 million based on the exchange rate as of July 11, 2012, the acquisition date). We have adjusted the contingent consideration to fair value at each reporting date with changes in fair value recognized in operating income. During the nine months ended September 30, 2015, we reduced the fair value by approximately £30.3 million. The adjustment was the result of an evaluation by management that no additional leases would be executed for vacant space by July 11, 2015, the contingency expiration date. The final payment on the earnout was made in August 2015. We made earnout payments of approximately £6.2 million (or approximately $10.3 million based on the exchange rates as of the date of each payment) during the nine months ended September 30, 2014. We made earnout payments of approximately £0.7 million (or approximately $1.1 million based on the exchange rates as of the date of each payment) during the nine months ended September 30, 2015. The change in fair value of contingent consideration for Sentrum was recorded as an increase to operating expense of approximately $0 and $1.5 million for the three months ended September 30, 2015 and 2014, respectively. The change in fair value of contingent consideration for Sentrum was recorded as a reduction to operating expense of approximately $43.0 million and $4.1 million for the nine months ended September 30, 2015 and 2014, respectively.

(b) Construction Commitments

Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements. From time to time in the normal course of our business, we enter into various construction contracts with third parties that may obligate us to make payments. At September 30, 2015, we had open commitments related to construction contracts of approximately $135.6 million.

(c) Legal Proceedings

Although the Company is involved in legal proceedings arising in the ordinary course of business, as of September 30, 2015, the Company is not currently a party to any legal proceedings nor, to its knowledge, is any legal proceeding threatened against it that it believes would have a material adverse effect on its financial position, results of operations or liquidity.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (continued)

September 30, 2015 and 2014

17. Subsequent Events

On October 9, 2015, the Company completed the Telx Acquisition, pursuant to an Agreement and Plan of Merger (the “Merger Agreement”), dated as of July 13, 2015, by and among the Company, Digital Delta, Inc., a Delaware corporation and wholly owned subsidiary of the Company, Telx Holdings, Inc. and BSR LLC, as representative of the sellers. The purchase price for the Telx Acquisition was approximately $1.886 billion (subject to certain adjustments contemplated by the Merger Agreement). The purchase price was paid in cash and was funded with the net proceeds from the (i) public offering of 10,000,000 shares of the Company’s 6.350% series I cumulative redeemable preferred stock, par value $0.01 per share, with a liquidation preference of $25.00 per share, completed on August 24, 2015, (ii) private placement by Digital Delta Holdings, LLC, a Delaware limited liability company and then-wholly owned subsidiary of the Company, of $500 million aggregate principal amount of its 3.400% Notes due 2020 and $450 million aggregate principal amount of its 4.750% Notes due 2025 completed on October 1, 2015, and (iii) sale of 10,500,000 shares of the Company’s common stock on October 8, 2015 for net proceeds of approximately $674.1 million pursuant to certain forward sale agreements entered into in connection with the underwritten public offering of the Company’s common stock completed on July 20, 2015.

On October 13, 2015, the Company, as sole general partner of the Operating Partnership executed the Fourteenth Amended and Restated Agreement of Limited Partnership of the Operating Partnership in connection with the Operating Partnership’s issuance to the Company of 10,000,000 of its 6.350% series I cumulative redeemable preferred units of partnership interests, or the series I preferred units, as partial consideration for the Operating Partnership Merger. The series I preferred units have substantially similar rights, preferences and other privileges as the series I preferred stock.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion should be read in conjunction with the condensed consolidated financial statements and notes thereto appearing elsewhere in this report. This report contains forward-looking statements within the meaning of the federal securities laws. In particular, statements pertaining to our capital resources, expected use of proceeds from our equity distribution program and other securities offerings, expected use of borrowings under our credit facility, portfolio performance, leverage policy, acquisition and capital expenditure plans, capital recycling program, returns on invested capital, supply and demand for data center space, capitalization rates, rents to be received in future periods and expected rental rates on new or renewed data center space, as well as our discussion of “Factors Which May Influence Future Results of Operations,” contain forward-looking statements. Likewise, all of our statements regarding anticipated market conditions, demographics and results of operations are forward-looking statements. You can identify forward-looking statements by the use of forward-looking terminology such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” “pro forma,” “estimates” or “anticipates” or the negative of these words and phrases or similar words or phrases which are predictions of or indicate future events or trends and discussions which do not relate solely to historical matters. You can also identify forward-looking statements by discussions of strategy, plans or intentions. Forward-looking statements involve numerous risks and uncertainties and you should not rely on them as predictions of future events. Forward-looking statements depend on assumptions, data or methods that may be incorrect or imprecise and that we may not be able to realize. We do not guarantee that the transactions and events described will happen as described or that they will happen at all. The following factors, among others, could cause actual results and future events to differ materially from those set forth or contemplated in the forward-looking statements: the impact of current global economic, credit and market conditions; current local economic conditions in our metropolitan areas; decreases in information technology spending, including as a result of economic slowdowns or recession; adverse economic or real estate developments in our industry or the industry sectors that we sell to (including risks relating to decreasing real estate valuations and impairment charges); our dependence upon significant tenants; bankruptcy or insolvency of a major tenant or a significant number of smaller tenants; defaults on or non-renewal of leases by tenants; our failure to obtain necessary debt and equity financing; risks associated with using debt to fund our business activities, including re-financing and interest rate risks, our failure to repay debt when due, adverse changes in our credit ratings or our breach of covenants or other terms contained in our loan facilities and agreements; financial market fluctuations; changes in foreign currency exchange rates; our inability to manage our growth effectively; difficulty acquiring or operating properties in foreign jurisdictions; the suitability of our properties and data center infrastructure, delays or disruptions in connectivity, failure of our physical infrastructure or services or availability of power; our failure to successfully integrate and operate acquired or developed properties or businesses, including Telx; risks related to joint venture investments, including as a result of our lack of control of such investments; delays or unexpected costs in development of properties; decreased rental rates, increased operating costs or increased vacancy rates; increased competition or available supply of data center space; our inability to successfully develop and lease new properties and development space; difficulties in identifying properties to acquire and completing acquisitions; our inability to acquire off-market properties; our inability to comply with the rules and regulations applicable to reporting companies; Digital Realty Trust, Inc.’s failure to maintain its status as a REIT for federal income tax purposes; possible adverse changes to tax laws; restrictions on our ability to engage in certain business activities; environmental uncertainties and risks related to natural disasters; losses in excess of our insurance coverage; changes in foreign laws and regulations, including those related to taxation and real estate ownership and operation; and changes in local, state and federal regulatory requirements, including changes in real estate and zoning laws and increases in real property tax rates.

While forward-looking statements reflect our good faith beliefs, they are not guarantees of future performance. We disclaim any obligation to publicly update or revise any forward-looking statement to reflect changes in underlying assumptions or factors, new information, data or methods, future events or other changes.

The risks included here are not exhaustive, and additional factors could adversely affect our business and financial performance, including factors and risks included in other sections of this report, including under Part II, Item 1A, Risk Factors. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for management to predict all such risk factors, nor can we assess the impact of all such risk factors on the business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, you should not place undue reliance on forward-looking statements as a prediction of actual results.

Occupancy percentages included in the following discussion, for some of our properties, are calculated based on factors in addition to contractually leased square feet, including available power, required support space and common area.

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Overview

Our company. Digital Realty Trust, Inc. completed its initial public offering of common stock, or our IPO, on November 3, 2004. We believe that we have operated in a manner that has enabled us to qualify, and have elected to be treated, as a REIT under Sections 856 through 860 of the Code. Our company was formed on March 9, 2004. During the period from our formation until we commenced operations in connection with the completion of our IPO, we did not have any corporate activity other than the issuance of shares of Digital Realty Trust, Inc. common stock in connection with the initial capitalization of the company. Our operating partnership was formed on July 21, 2004.

Business and strategy. Our primary business objectives are to maximize: (i) sustainable long-term growth in earnings and funds from operations per share and unit, (ii) cash flow and returns to our stockholders and our operating partnership’s unitholders through the payment of distributions and (iii) return on invested capital. We expect to achieve our objectives by focusing on our core business of investing in and developing technology-related real estate. A significant component of our current and future internal growth is anticipated through the development of our existing space held for development and acquisition of new properties. We target high quality, strategically located properties containing applications and operations critical to the day-to-day operations of corporate enterprise data center and technology industry tenants and properties that may be developed for such use. Most of our properties contain fully redundant electrical supply systems, multiple power feeds, above-standard cooling systems, raised floor areas, extensive in-building communications cabling and high-level security systems. We focus solely on technology-related real estate because we believe that the growth in corporate data center adoption and the technology-related real estate industry generally will continue to be superior to that of the overall economy.

As of September 30, 2015, we owned an aggregate of 132 properties, including eight properties held-for-sale and 14 properties held as investments in unconsolidated joint ventures, with approximately 24.6 million rentable square feet including approximately 1.4 million square feet of space under active development and approximately 1.3 million square feet of space held for future development. The 14 properties held as investments in unconsolidated joint ventures have an aggregate of approximately 1.9 million rentable square feet. The 14 parcels of developable land we own comprised approximately 167 acres. At September 30, 2015, approximately 1.4 million square feet was under construction for Turn-Key Flex^®, Powered Base Building^® and Custom Solutions products, all of which are expected to be income producing on or after completion, in three U.S. domestic metropolitan areas, two European metropolitan areas, one Canadian metropolitan area, one Australian metropolitan area and one Singapore metropolitan area, consisting of approximately 0.8 million square feet of base building construction and 0.6 million square feet of data center construction.

We have developed detailed, standardized procedures for evaluating new real estate investments to ensure that they meet our financial, technical and other criteria. We expect to continue to acquire additional assets as part of our growth strategy. We intend to aggressively manage and lease our assets to increase their cash flow. We may continue to build out our development portfolio when justified by anticipated returns.

We may acquire properties subject to existing mortgage financing and other indebtedness or we may incur new indebtedness in connection with acquiring or refinancing these properties. Debt service on such indebtedness will have a priority over any cash dividends with respect to Digital Realty Trust, Inc.’s common stock and preferred stock. We currently intend to limit our indebtedness to 60% of our total enterprise value and, based on the closing price of Digital Realty Trust, Inc. common stock on September 30, 2015 of $65.32, our ratio of debt to total enterprise value was approximately 31%. Our total enterprise value is defined as the sum of the market value of Digital Realty Trust, Inc.’s outstanding common stock (which may decrease, thereby increasing our debt to total enterprise value ratio), excluding options issued under our company’s incentive award plan, plus the liquidation value of Digital Realty Trust, Inc.’s preferred stock, plus the aggregate value of our operating partnership’s units not held by Digital Realty Trust, Inc. (with the per unit value equal to the market value of one share of Digital Realty Trust, Inc. common stock and excluding long-term incentive units, Class C units and Class D units), plus the book value of our total consolidated indebtedness.

Revenue base. As of September 30, 2015, we owned 132 properties through our operating partnership, including 14 properties held as investments in unconsolidated joint ventures and developable land. These properties are mainly located throughout the U.S., with 23 properties located in Europe, three properties in Australia, three properties in Asia and two properties in Canada. We, through our predecessor, acquired our first portfolio property in January 2002 and have added properties through acquisition and development activities as follows:

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Year Ended December 31:	Operating Properties Acquired  (1)		Net Rentable Square Feet(2)	Square Feet of Space Under Active Development as of September 30, 2015 (3)	Square Feet of Space Held for Future Development as of September 30, 2015 (4)
2002	4		1,093,250	—	46,530
2003	5	(5)	1,005,855	—	—
2004	10	(5)	2,375,410	—	108,445
2005	19	(5)	2,822,831	—	145,122
2006	18	(5)	2,851,131	—	30,926
2007	13	(5)(6)	1,742,398	—	84,268
2008	5		463,560	—	187,344
2009	8	(7)(9)(10)	1,675,113	597,469	59,378
2010	15		2,525,580	—	97,026
2011	11	(8)	1,562,172	338,552	136,456
2012	15		2,683,569	179,936	306,458
2013	8		1,107,045	92,358	123,329
2014	—		—	—	—
2015	1		—	177,000	—
Operating properties owned as of September 30, 2015	132		21,907,914	1,385,315	1,325,282

(1) Excludes properties sold: 833 Chestnut Street (April 2015), 3300 East Birch Street (March 2015), 100 Quannapowitt (February 2015), 6 Braham Street (April 2014), 100 Technology Center Drive (March 2007), 4055 Valley View Lane (March 2007) and 7979 East Tufts Avenue (July 2006). In addition, also excludes 701 & 717 Leonard Street, a parking garage located adjacent to our internet gateway data center located at 2323 Bryan Street and not considered a separate property. Also excludes a leasehold interest acquired in March 2007 related to an acquisition made in 2006. Excludes 13 developable land parcels. Includes 12 properties held in our managed portfolio of unconsolidated joint ventures consisting of 4650 Old Ironsides Drive (Silicon Valley), 2950 Zanker Road (Silicon Valley), 4700 Old Ironsides Drive (Silicon Valley), 444 Toyama Drive (Silicon Valley), 43790 Devin Shafron Drive (Northern Virginia), 21551 Beaumeade Circle (Northern Virginia), 7505 Mason King Court (Northern Virginia), 14901 FAA Boulevard (Dallas), 900 Dorothy Drive (Dallas), 636 Pierce Street (New York Metro), 43915 Devin Shafron Drive (Northern Virginia) and 33 Chun Choi Street (Hong Kong); and two properties held in our non-managed unconsolidated joint ventures consisting of 2001 Sixth Avenue (Seattle) and 2020 Fifth Avenue (Seattle).

(2) Current net rentable square feet as of September 30, 2015, which represents the current square feet under lease as specified in the applicable lease agreements plus management’s estimate of space available for lease based on engineering drawings. Includes tenants’ proportional share of common areas but excludes space held for development.

(3) Space under active development includes current base building and data center projects in progress.

(4) Space held for future development includes space held for future data center development, and excludes space under active development.

(5) As of September 30, 2015, there were eight properties held for sale; one was acquired in 2003, two in 2004, two in 2005, one in 2006 and two in 2007.

(6) Includes three developed buildings (43915 Devin Shafron Drive, 43830 Devin Shafron Drive and 43790 Devin Shafron Drive) placed into service in 2010 and 2011 that are being included with a property (Devin Shafron buildings) that was acquired in 2007.

(7) Includes a developed building (21551 Beaumeade Circle) placed into service in 2011 that is being included with a property (Beaumeade Circle Portfolio) that was acquired in 2009.

(8) Includes four developed buildings (43940 Digital Loudoun Plaza in Northern Virginia, 3825 NW Aloclek Place in Portland, Oregon, 98 Radnor Drive in Melbourne, Australia and 1-23 Templar Road in Sydney, Australia) placed into service in 2012 and 2013, in which the land parcels were acquired in 2011.

(9) 43790 Devin Shafron Drive and 21551 Beaumeade Circle, which were previously included as part of the Devin Shafron buildings and Beaumeade Circle Portfolio, respectively, are now each separately included in the property count because they were separately contributed to an unconsolidated joint venture in September 2013.

(10) 43915 Devin Shafron Drive, which was previously included as part of the Devin Shafron buildings, is now separately included in the property count because it was separately contributed to an unconsolidated joint venture in September 2014.

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As of September 30, 2015, the properties in our portfolio, including the 14 properties held as investments in unconsolidated joint ventures, were approximately 93.0% leased excluding approximately 1.4 million square feet of space under active development and approximately 1.3 million square feet of space held for future development. Due to the capital-intensive and long-term nature of the operations being supported, our lease terms are generally longer than standard commercial leases. As of September 30, 2015, our average lease term at signing is approximately 12.0 years, with an average of approximately 6.2 years remaining. Our scheduled lease expirations through December 31, 2016 are 7.4% of rentable square feet excluding month-to-month leases, space under active development and space held for future development as of September 30, 2015.

On February 5, 2015, the operating partnership sold the 100 Quannapowitt property for approximately $31 million. The transaction after costs resulted in net proceeds of approximately $29 million and a net gain of approximately $10 million. The property was identified as held for sale as of December 31, 2014. 100 Quannapowitt was not a significant component of our U.S. portfolio nor does the sale represent a significant shift in our strategy.

On March 31, 2015, the operating partnership sold the 3300 East Birch Street property for approximately $14 million. The transaction after costs resulted in net proceeds of approximately $14 million and a net gain of approximately $8 million. The property was identified as held for sale as of December 31, 2014. 3300 East Birch Street was not a significant component of our U.S. portfolio nor does the sale represent a significant shift in our strategy.

On April 30, 2015, the operating partnership sold the 833 Chestnut Street property for approximately $161 million. The transaction after costs and buyer credits resulted in net proceeds of approximately $159 million, including a $9 million note receivable, and a net gain of approximately $77 million. The property was identified as held for sale as of March 31, 2015. 833 Chestnut Street was not a significant component of our U.S. portfolio nor does the sale represent a significant shift in our strategy.

Factors Which May Influence Future Results of Operations

Global market and economic conditions. United States and international market and economic conditions in recent years have been unprecedented and challenging with tighter credit conditions and slower economic growth in many metropolitan areas in which we own properties and conduct our operations. The U.S. and global economies have experienced a recession and face continued concerns about the systemic impact of adverse economic conditions, such as geopolitical issues, the availability and cost of credit, unstable global financial and mortgage markets, high corporate, consumer and governmental debt levels, ongoing sovereign debt and economic issues in European countries, and high unemployment. The European debt crisis has raised concerns regarding the debt burden of certain countries using the euro as their currency and their ability to meet future financial obligations. While recent economic trends across the eurozone have been largely positive, concerns remain regarding the creditworthiness of certain European countries, which could lead to the re-introduction of individual currencies in one or more Eurozone countries. These potential developments, or market perceptions concerning these and related issues, could adversely affect our leasing and financing activities, rents we receive, potential acquisitions and development projects in Europe.

As a result of these conditions, general economic conditions and the cost and availability of capital have been and may again be adversely affected in some or all of the metropolitan areas in which we own properties and conduct our operations. Renewed or increased turbulence in the U.S., European, Asia Pacific and other international financial markets and economies may adversely affect our ability, and the ability of our tenants, to replace or renew maturing liabilities on a timely basis, access the capital markets to meet liquidity and capital expenditure requirements and may result in adverse effects on our, and our tenants’, financial condition and results of operations.

In addition, our access to funds under our global revolving credit facility depends on the ability of the lenders that are parties to such facilities to meet their funding commitments to us. We cannot assure you that long-term disruptions in the global economy and the return of tighter credit conditions among, and potential failures or nationalizations of, third party financial institutions as a result of such disruptions will not have an adverse effect on our lenders. If our lenders are not able to meet their funding commitments to us, our business, results of operations, cash flows and financial condition could be adversely affected.

If we do not have sufficient cash flow to continue operating our business and are unable to borrow additional funds, access our existing lines of credit or raise equity or debt capital, we may need to source alternative ways to increase our liquidity. Such alternatives may include, without limitation, curtailing development activity, disposing of one or more of our properties possibly on disadvantageous terms or entering into or renewing leases on less favorable terms than we otherwise would.

Foreign currency exchange risk.For the nine months ended September 30, 2015 and 2014, we had foreign operations in the United Kingdom, Ireland, France, The Netherlands, Switzerland, Canada, Singapore, Australia, Japan and Hong Kong, and, as such, are subject to risk from the effects of exchange rate movements of foreign currencies, which may affect future costs and cash flows. Our foreign operations are conducted in the British pound sterling, Euro, Swiss franc, Canadian dollar, Singapore

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dollar, Australian dollar, Japanese Yen and the Hong Kong dollar. Our primary currency exposures are to the British pound sterling, the Euro and the Singapore dollar. We attempt to mitigate a portion of the risk of currency fluctuation by financing our investments in the local currency denominations, although there can be no assurance that this will be effective. As a result, changes in the relation of any such foreign currency to U.S. dollars may affect our revenues, operating margins and distributions and may also affect the book value of our assets and the amount of stockholders’ equity.

Rental income. The amount of rental income generated by the properties in our portfolio depends on several factors, including our ability to maintain or improve the occupancy rates of currently leased space and to lease currently available space and space available from lease terminations. Excluding approximately 1.4 million square feet of space under active development and approximately 1.3 million square feet of space held for future development as of September 30, 2015, the occupancy rate of the properties in our portfolio, including the 14 properties held as investments in unconsolidated joint ventures, was approximately 93.0% of our net rentable square feet.

As of September 30, 2015, we had over 650 tenants in our portfolio, including the 12 properties held in our managed portfolio of unconsolidated joint ventures. As of September 30, 2015, approximately 91% of our leases (on a rentable square footage basis) contained base rent escalations that were either fixed (generally ranging from 2% to 4%) or indexed based on a consumer price index or other similar inflation related index. We cannot assure you that these escalations will cover any increases in our costs or will otherwise keep rental rates at or above market rates.

The amount of rental income generated by us also depends on maintaining or increasing rental rates at our properties, which in turn depends on several factors, including supply and demand and market rates for data center space. Included in our approximately 20.3 million net rentable square feet, excluding space under active development and space held for future development and 14 properties held as investments in unconsolidated joint ventures, at September 30, 2015 is approximately 0.6 million square feet of data center space with extensive installed tenant improvements available for lease. Since our IPO, we have leased approximately 4.6 million square feet of similar space, including Turn-Key Flex^® space. Our Turn-Key Flex^® product is an effective solution for tenants who prefer to utilize a partner with the expertise or capital budget to provide extensive data center infrastructure and security. Our expertise in data center construction and operations enables us to lease space to these tenants at a premium over other uses. In addition, as of September 30, 2015, we had approximately 1.4 million square feet of space under active development and approximately 1.3 million square feet of space held for future development, or approximately 12% of the total rentable space in our portfolio, including one vacant property comprising approximately 0.1 million square feet and the 14 properties held as investments in unconsolidated joint ventures. Our ability to grow earnings depends in part on our ability to develop space and lease development space at favorable rates, which we may not be able to obtain. Development space requires significant capital investment in order to develop data center facilities that are ready for use and, in addition, we may require additional time or encounter delays in securing tenants for development space. We may purchase additional vacant properties and properties with vacant development space in the future. We will require additional capital to finance our development activities, which may not be available or may not be available on terms acceptable to us, including as a result of the conditions described above under “Global market and economic conditions.”

In addition, the timing between when we sign a new lease with a tenant and when that lease commences and we begin to generate rental income may be significant and may not be easily predictable. Certain leases may provide for staggered commencement dates for additional space, the timing of which may be delayed significantly.

Economic downturns, including as a result of the conditions described above under “Global market and economic conditions,” or regional downturns affecting our markets or downturns in the technology-related real estate industry that impair our ability to lease or renew or re-lease space, or otherwise reduce returns on our investments or the ability of our tenants to fulfill their lease commitments, as in the case of tenant bankruptcies, could adversely affect our ability to maintain or increase rental rates at our properties.

Scheduled lease expirations. Our ability to re-lease expiring space at rental rates equal to or in excess of current rental rates will impact our results of operations. In addition to approximately 1.5 million square feet of available space in our portfolio, which excludes approximately 1.4 million square feet of space under active development and approximately 1.3 million square feet of space held for future development as of September 30, 2015 and the two properties held as investments in our non-managed unconsolidated joint ventures, leases representing approximately 2.4% and 5.0% of the net rentable square footage of our portfolio are scheduled to expire during the three months ending December 31, 2015 and the year ending December 31, 2016, respectively.

During the nine months ended September 30, 2015, we signed new leases totaling approximately 0.6 million square feet of space and renewal leases totaling approximately 1.0 million square feet of space. The following table summarizes our leasing activity in the nine months ended September 30, 2015:

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	Rentable Square Feet (1)	Expiring Rates (2)		New Rates (2)		Rental Rate Changes		TI’s/Lease Commissions Per Square Foot		Weighted  Average Lease Terms (years)
Leasing Activity (3)(4)
Renewals Signed
Turn-Key Flex ®	236,829	$	133.39	$	137.69	3.2	%	$	4.50	3.4
Powered Base Building ®	455,765	$	19.32	$	23.90	23.7	%	$	2.77	5.5
Colocation	43,998	$	187.79	$	211.10	12.4	%	$	6.52	1.9
Non-technical	276,909	$	17.58	$	18.57	5.6	%	$	7.62	9.6
New Leases Signed (5)
Turn-Key Flex ®	511,235	—		$	156.23	—		$	31.86	5.8
Colocation	44,452	—		$	232.81	—		$	65.85	4.2
Non-technical	19,009	—		$	30.05	—		$	7.74	5.8
Leasing Activity Summary
Turn-Key Flex ®	748,064	—		$	150.36	—		—
Powered Base Building ®	455,765	—		$	23.90	—		—
Colocation	88,450	—		$	222.01	—		—
Non-technical	295,918	—		$	19.31	—		—

(1) For some of our properties, we calculate square footage based on factors in addition to contractually leased square feet, including power, required support space and common area.

(2) Rental rates represent annual estimated cash rent per rentable square foot adjusted for straight-line rents in accordance with GAAP. GAAP rental rates are inclusive of tenant concessions, if any.

(3) Excludes short-term leases.

(4) Commencement dates for the leases signed range from 2015 to 2016.

(5) Includes leases signed for new and re-leased space.

Our ability to re-lease or renew expiring space at rental rates equal to or in excess of current rental rates will impact our results of operations. We continue to see strong demand in most of our key markets for data center space and, subject to the supply of available data center space in these markets, expect the rental rates we are likely to achieve on any new, re-leased or renewed data center space leases for 2015 expirations on an average aggregate basis will generally be higher than the rates currently being paid for the same space on a GAAP basis and flat on a cash basis. For the nine months ended September 30, 2015, rents on renewed space increased by an average of 3.2% on a GAAP basis on our Turn-Key Flex^® space compared to the expiring rents and increased by an average of 23.7% on a GAAP basis on our Powered Base Building^® space compared to the expiring rents. Our past performance may not be indicative of future results, and we cannot assure you that leases will be renewed or that our properties will be re-leased at all or at rental rates equal to or above the current average rental rates. Further, re-leased/renewed rental rates in a particular market may not be consistent with rental rates across our portfolio as a whole and may fluctuate from one period to another due to a number of factors, including local real estate conditions, local supply and demand for data center space, competition from other data center developers or operators, the condition of the property and whether the property, or space within the property, has been developed.

Metropolitan area concentration. We depend on the market for technology-based real estate in specific geographic regions and significant changes in these regional metropolitan areas can impact our future results. As of September 30, 2015, our portfolio, including the 14 properties held as investments in unconsolidated joint ventures, was geographically concentrated in the following metropolitan areas.

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Metropolitan Market	Percentage of September 30, 2015 total annualized rent (1)
Northern Virginia	11.9	%
London, England	11.3	%
Dallas	10.2	%
Silicon Valley	9.9	%
New York Metro	8.6	%
Chicago	7.8	%
Phoenix	6.5	%
San Francisco	5.3	%
Singapore	3.8	%
Boston	3.7	%
Seattle	3.1	%
Los Angeles	2.9	%
Paris, France	1.8	%
Other	13.2	%
Total	100.0	%

(1) Annualized rent is monthly contractual rent (defined as cash base rent before abatements) under existing leases as of September 30, 2015 multiplied by 12. The aggregate amount of abatements for the nine months ended September 30, 2015 was approximately $20.1 million.

Operating expenses. Our operating expenses generally consist of utilities, property and ad valorem taxes, property management fees, insurance and site maintenance costs, as well as rental expenses on our ground and building leases. In particular, our buildings require significant power to support the data center operations contained in them. Many of our leases contain provisions under which the tenants reimburse us for a portion of property operating expenses and real estate taxes incurred by us. However, we generally are not entitled to reimbursement of property operating expenses, other than utility expense, and real estate taxes under our leases for Turn-Key Flex^® facilities. We also incur general and administrative expenses, including expenses relating to our asset management function, as well as significant legal, accounting and other expenses related to corporate governance, SEC reporting and compliance with the various provisions of the Sarbanes-Oxley Act. Increases or decreases in such operating expenses will impact our overall performance. We expect to incur additional operating expenses as we continue to expand.

Climate change legislation. In June 2009, the U.S. House of Representatives approved comprehensive clean energy and climate change legislation intended to cut greenhouse gas, or GHG, emissions, via a cap-and-trade program. The U.S. Senate did not subsequently pass similar legislation. New climate change legislation was introduced in the U.S. Senate in 2013, but significant opposition to federal climate change legislation exists. As a result, near-term action to reduce GHG emissions likely will be focused on regulatory agencies, primarily the U.S. Environmental Protection Agency, or EPA, and state actions. The EPA has been moving aggressively to regulate GHG emissions from automobiles and large stationary sources, including electricity producers, using its own authority under the Clean Air Act. The EPA made an endangerment finding in 2009 that allows it to create regulations imposing emission reporting, permitting, control technology installation, and monitoring requirements applicable to certain emitters of GHGs, including facilities that provide electricity to our data centers, although the materiality of the impacts will not be fully known until all regulations are finalized and legal challenges are resolved.

As of September 30, 2015, the EPA has finalized rules imposing permitting and control technology requirements upon certain newly-constructed or modified facilities which emit GHGs under the Clean Air Act New Source Review Prevention of Significant Deterioration, or NSR PSD, and Title V permitting programs. As a result, newly-issued NSR PSD and Title V permits for new or modified electricity generating units (EGUs) and other facilities may need to address GHG emissions, including by requiring the installation of “Best Available Control Technology.” Following a multiyear rulemaking period, the EPA announced in August 2015 final rules that are set to become effective in December 2015 regulating carbon dioxide (CO2) emissions from new and existing coal-fired and natural gas EGUs. Existing EGUs are subject to statewide CO2 emission reduction targets, an effort designed to achieve a thirty-two percent reduction in nationwide existing EGU CO2 emissions by 2030 (in comparison to 2005 levels). New, modified, and reconstructed EGUs are subject to “New Source Performance Standards” that include both technological requirements and numeric emission limits. Certain of the rules finalized in August 2015 have been challenged in federal court by twenty-four states and a number of industry groups. Separately, the EPA’s GHG

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“reporting rule” requires that certain emitters, including electricity generators, monitor and report GHG emissions. At the state level, California implemented a GHG cap-and-trade program that began imposing compliance obligations on industrial sectors, including electricity generators and importers, in January 2013. In addition, since 2005 the European Union (including the United Kingdom) has been operating under a cap-and-trade program, which directly affects the largest emitters of GHGs, including electricity producers from whom we purchase power.

The cost of electric power comprises a significant component of our operating expenses. Any additional taxation or regulation of energy use, including as a result of (i) new legislation that Congress may pass, (ii) the regulations that the EPA has proposed or finalized, (iii) regulations under legislation that states have passed or may pass, or (iv) any further reductions in the EU program could significantly increase our costs, and we may not be able to effectively pass all of these costs on to our tenants. These matters could adversely impact our business, results of operations, or financial condition.

Interest rates. As of September 30, 2015, we had approximately $469.1 million of variable rate debt subject to interest rate swap agreements on certain tranches of our unsecured term loan, along with $689.0 million and $469.1 million of variable rate debt that was outstanding on the global revolving credit facility and the unswapped portion of the unsecured term loan, respectively. The availability of debt and equity capital may decrease as a result of the circumstances described above under “Global market and economic conditions.” The effects on commercial real estate mortgages, if available, include, but may not be limited to: higher loan spreads, tightened loan covenants, reduced loan to value ratios resulting in lower borrower proceeds and higher principal payments. Potential future increases in interest rates and credit spreads may increase our interest expense and fixed charges and negatively affect our financial condition and results of operations, potentially impacting our future access to the debt and equity capital markets. Increased interest rates may also increase the risk that the counterparties to our swap agreements will default on their obligations, which could further increase our interest expense. If we cannot obtain capital from third party sources, we may not be able to acquire or develop properties when strategic opportunities exist, satisfy our debt service obligations or pay the cash dividends to Digital Realty Trust, Inc.’s stockholders necessary to maintain its qualification as a REIT.

Demand for data center space. Our portfolio of properties consists primarily of technology-related real estate and data center real estate in particular. A decrease in the demand for, or increase in supply of, data center space, Internet gateway facilities or other technology-related real estate would have a greater adverse effect on our business and financial condition than if we owned a portfolio with a more diversified tenant base or less specialized use. We have invested in building out additional inventory primarily in what we anticipate will be our active major metropolitan areas prior to having executed leases with respect to this space. We believe that demand continues to exceed supply in most metropolitan areas in which we operate, particularly in Dallas, Northern Virginia and Singapore. However, until this inventory is leased up, which will depend on a number of factors, including available data center space in these metropolitan areas, our return on invested capital is negatively impacted. Our development activities make us particularly susceptible to general economic slowdowns, including recessions and the other circumstances described above under “Global market and economic conditions,” as well as adverse developments in the corporate data center, Internet and data communications and broader technology industries. Any such slowdown or adverse development could lead to reduced corporate IT spending or reduced demand for data center space. Reduced demand could also result from business relocations, including to metropolitan areas that we do not currently serve. Changes in industry practice or in technology, such as virtualization technology, more efficient computing or networking devices, or devices that require higher power densities than today’s devices, could also reduce demand for the physical data center space we provide or make the tenant improvements in our facilities obsolete or in need of significant upgrades to remain viable. In addition, the development of new technologies, the adoption of new industry standards or other factors could render many of our tenants’ current products and services obsolete or unmarketable and contribute to a downturn in their businesses, thereby increasing the likelihood that they default under their leases, become insolvent or file for bankruptcy. In addition, demand for data center space in our properties, or the rates at which we lease space, may be adversely impacted either across our portfolio or in specific metropolitan areas as a result of an increase in the number of competitors, or the amount of space being offered in our metropolitan areas and other metropolitan areas by our competitors.

Telx Acquisition. We believe that the Telx Acquisition will provide a number of strategic and financial benefits, including providing us a leading colocation and interconnection platform, a premium connectivity infrastructure and enhanced growth potential in attractive locations. However, there can be no assurance that we will realize the intended benefits of the Telx Acquisition and it may disrupt our plans and operations. In addition, we may be subject to unknown or contingent liabilities related to Telx for which we may have no or limited recourse against the sellers.

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Critical Accounting Policies

Our discussion and analysis of our financial condition and results of operations are based upon our condensed consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of these financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses in the reporting period. Our actual results may differ from these estimates. We have provided a summary of our significant accounting policies in Item 1, Note 2 “Summary of Significant Accounting Policies” in the Notes to Condensed Consolidated Financial Statements. We describe below those accounting policies that require material subjective or complex judgments and that have the most significant impact on our financial condition and consolidated results of operations. Our management evaluates these estimates on an ongoing basis, based upon information currently available and on various assumptions management believes are reasonable as of the date on the front cover of this report.

Investments in Real Estate

Acquisition of real estate. The price that we pay to acquire a property is impacted by many factors including the condition of the property and improvements, the occupancy of the building, the term and rate of in-place leases, the creditworthiness of the tenants, favorable or unfavorable financing, above or below-market ground leases and numerous other factors.

Accordingly, we are required to make subjective assessments to allocate the purchase price paid to acquire investments in real estate among the identifiable assets including intangibles and liabilities assumed based on our estimate of the fair value of such assets and liabilities. This includes determining the value of the property and improvements, land, ground leases, if any, and tenant improvements. Additionally, we evaluate the value of in-place leases on occupancy and market rent, the value of the tenant relationships, the value (or negative value) of above (or below) market leases, any debt or deferred taxes assumed from the seller or loans made by the seller to us and any building leases assumed from the seller. Each of these estimates requires a great deal of judgment and some of the estimates involve complex calculations. These allocation assessments have a direct impact on our results of operations. For example, if we were to allocate more value to land, there would be no depreciation with respect to such amount. If we were to allocate more value to the property as opposed to allocating to the value of in-place tenant leases, this amount would be recognized as an expense over a much longer period of time. This potential effect occurs because the amounts allocated to property are depreciated over the estimated lives of the property whereas amounts allocated to in-place tenant leases are amortized over the estimated term (including renewal and extension assumptions) of the leases. Additionally, the amortization of the value (or negative value) assigned to above (or below) market rate leases is recorded as an adjustment to rental revenue as compared to amortization of the value of in-place tenant leases and tenant relationships, which is included in depreciation and amortization in our condensed consolidated income statements.

From time to time, we will receive offers for sale of our properties, either solicited or unsolicited. For those offers that are accepted, the prospective buyer will usually require a due diligence period before consummation of the transaction. It is not unusual for matters to arise that result in the withdrawal or rejection of the offer during this process. We classify real estate as “held for sale” when all criteria under the GAAP guidance has been met.

Capitalization of costs. Direct and indirect project costs that are clearly associated with the development of properties are capitalized as incurred. Project costs include all costs directly associated with the development of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development are not capitalized and are charged to expense as incurred.

Capitalization of costs begins when the activities necessary to get the development project ready for its intended use begin, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development project is substantially complete and ready for its intended use. Determining when a development project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development project to be substantially complete and ready for its intended use upon receipt of a certificate of occupancy. If and when development of a property is suspended pursuant to a formal change in the planned use of the property, we will evaluate whether the accumulated costs exceed the estimated value of the project and write off the amount of any such excess accumulated costs. For a development project that is suspended for reasons other than a formal change in the planned use of such property, the accumulated project costs are evaluated for impairment consistent with our impairment policies for long-lived assets. Capitalized costs are allocated to the specific components of a project that are benefited.

Useful lives of assets. We are required to make subjective assessments as to the useful lives of our properties for purposes of determining the amount of depreciation to record on an annual basis with respect to our investments in real estate. These assessments have a direct impact on our net income because if we were to shorten the expected useful lives of our investments in real estate we would depreciate such investments over fewer years, resulting in more depreciation expense and lower net income on an annual basis.

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Asset impairment evaluation. We review each of our properties for indicators that its carrying amount may not be recoverable. Examples of such indicators may include a significant decrease in the market price of the property, a change in the expected holding period for the property, a significant adverse change in the extent or manner in which the property is being used in its physical condition or expected to be used based on the underwriting at the time of acquisition, an accumulation of costs significantly in excess of the amount originally expected for the acquisition or development of the property, or a history of operating or cash flow losses of the property. When such impairment indicators exist, we review an estimate of the future undiscounted net cash flows (excluding interest charges) expected to result from the real estate investment’s use and eventual disposition and compare that estimate to the carrying value of the property. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If our future undiscounted net cash flow evaluation indicates that we are unable to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property. These losses have a direct impact on our net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results in future periods. Since cash flows on properties considered to be long-lived assets to be held and used are considered on an undiscounted basis to determine whether the carrying value of a property is recoverable, our strategy of holding properties over the long-term directly decreases the likelihood of their carrying values not being recoverable and therefore requiring the recording of an impairment loss. If our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized and such loss could be material. If we determine that the asset fails the recoverability test, the affected assets must be reduced to their fair value.

We generally estimate the fair value of rental properties utilizing a discounted cash flow analysis that includes projections of future revenues, expenses and capital improvement costs that a market participant would use based on the highest and best use of the asset, which is similar to the income approach that is commonly utilized by appraisers. In certain cases, we may supplement this analysis by obtaining outside broker opinions of value.

Revenue Recognition

Rental revenue is recognized using the straight-line method over the terms of the tenant leases. Deferred rents included in our condensed consolidated balance sheets represent the aggregate excess of rental revenue recognized to date on a straight-line basis versus the contractual rental payments under the terms of the leases. Many of our leases contain provisions under which the tenants reimburse us for a portion of property operating expenses and real estate taxes incurred by us. However, we generally are not entitled to reimbursement of property operating expenses, other than utility expense, and real estate taxes under our leases for Turn-Key Flex^® facilities. Such reimbursements are recognized in the period that the expenses are incurred. Lease termination fees are recognized over the remaining term of the lease, effective as of the date the lease modification is finalized, assuming collection is not considered doubtful. As discussed above, we recognize amortization of the value of acquired above or below-market tenant leases as a reduction of rental revenue in the case of above-market leases or an increase to rental revenue in the case of below-market leases.

We must make subjective estimates as to when our revenue is earned and the collectability of our accounts receivable related to minimum rent, deferred rent, expense reimbursements, lease termination fees and other income. We specifically analyze accounts receivable and historical bad debts, tenant concentrations, tenant creditworthiness and current economic trends when evaluating the adequacy of the allowance for bad debts. These estimates have a direct impact on our net revenue because a higher bad debt allowance would result in lower net revenue, and recognizing rental revenue as earned in one period versus another would result in higher or lower net revenue for a particular period.

Share-Based Awards

We recognize compensation expense related to share-based awards. We generally amortize this compensation expense over the vesting period of the award. The calculation of the fair value of share-based awards is subjective and requires several assumptions over such items as expected stock volatility, dividend payments and future company results. These assumptions have a direct impact on our net income because a higher share-based awards amount would result in lower net income for a particular period.

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Recently Issued Accounting Pronouncements

In February 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which provides guidance on the consolidation evaluation for reporting organizations that are required to evaluate whether they should consolidate certain legal entities. In accordance with the guidance, all legal entities are subject to reevaluation under the revised consolidation model. The guidance is effective in the first quarter of 2016, and early adoption is permitted. We are currently evaluating the potential impact of the adoption of ASU 2015-02 on our consolidated financial statements.

On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however, if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. We are currently assessing the impact of the guidance on our consolidated financial statements.

On April 17, 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the associated debt liability.  Currently, debt issuance costs are recorded as an asset and amortization of these deferred financing costs is recorded in interest expense.  Under the new standard, debt issuance costs will continue to be amortized over the life of the debt instrument and amortization will continue to be recorded in interest expense.  The new standard is effective for us on January 1, 2016 and will be applied on a retrospective basis.  We are currently evaluating ASU 2015-03, and anticipate a change in our presentation only since the standard does not alter the accounting for debt issuance costs.

In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement Period Adjustments (Topic 805). ASU 2015-16 requires an acquirer in a business combination to recognize provisional amounts when measurements were incomplete as of the end of a reporting period as an adjustment in the reporting period in which the provisional amount is determined. Prior to this standard, the acquirer was required to adjust such provisional amounts by restating prior period financial statements. ASU 2015-16 is effective for the annual period ending December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. We have elected to early adopt this standard effective with the interim period beginning July 1, 2015 and this standard did not have a material effect on the consolidated financial statements.

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Results of Operations

The discussion below relates to our financial condition and results of operations for the three and nine months ended September 30, 2015 and 2014. A summary of our operating results for the three and nine months ended September 30, 2015 and 2014 is as follows (in thousands).

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Income Statement Data:
Total operating revenues	$	435,989		$	412,186		$	1,262,893		$	1,204,222
Total operating expenses	(331,859		)	(329,814		)	(902,392		)	(939,390		)
Operating income	104,130			82,372			360,501			264,832
Other income (expenses), net	(46,288		)	47,789			(42,337		)	(26,622		)
Net income	$	57,842		$	130,161		$	318,164		$	238,210

Our property portfolio has experienced consistent and significant growth since the first property acquisition in January 2002. As a result of this growth, our period-to-period comparison of our financial performance focuses on the impact on our revenues and expenses on a stabilized portfolio basis. Our stabilized portfolio includes properties owned as of December 31, 2013 with less than 5% of total rentable square feet under development and excludes properties that were undergoing, or were expected to undergo, development activities in 2014-2015 and properties sold or contributed to joint ventures.

We acquired the following real estate properties during the nine months ended September 30, 2015:

Location	Metropolitan Area	Date Acquired	Amount (in millions) (1)
Deer Park 3 (2)	Melbourne	April 15, 2015	$	1.6
3 Loyang Way (3)(4)	Singapore	June 25, 2015	45.0
			$	46.6

(1) Purchase price in U.S. dollars and excludes capitalized closing costs on land acquisitions. Purchase prices for acquisitions outside the United States are based on the exchange rate at the date of acquisition.

(2) Represents currently vacant land which is not included in our operating property count.

(3) Represents a development property with an existing shell, which is included in our operating property count. This acquisition lacked key inputs to qualify as a business combination under purchase accounting guidance, and has therefore been accounted for as an asset acquisition, not a business combination.

(4) Property is subject to a ground lease, which expires in February 2024, with a renewal provision of an additional 28 years upon satisfaction of certain requirements.

Comparison of the Three and Nine Months Ended September 30, 2015 to the Three and Nine Months Ended September 30, 2014

Portfolio

As of September 30, 2015, our portfolio consisted of 132 properties, including 14 properties held as investments in unconsolidated joint ventures and developable land, with an aggregate of 24.6 million rentable square feet including 1.4 million square feet of space under active development and 1.3 million square feet of space held for future development compared to a portfolio consisting of 132 properties, including 14 properties held as investments in unconsolidated joint ventures and developable land, with an aggregate of 24.5 million rentable square feet including 1.3 million square feet of space under active development and 1.2 million square feet of space held for future development as of September 30, 2014. The changes in our portfolio reflect the acquisition of one property (in addition, two properties were placed into service in 2015 developed on land parcels which were acquired prior to January 1, 2014) and the sale of three properties during the twelve months ended September 30, 2015.

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Revenues

Total operating revenues for the three and nine months ended September 30, 2015 and 2014 were as follows (in thousands):

	Three Months Ended September 30,							Nine Months Ended September 30,
	2015		2014		Change			2015		2014		Change
Rental	$	338,330	$	317,064	$	21,266		$	988,172	$	936,270	$	51,902
Tenant reimbursements	95,484		92,209		3,275			268,885		261,517		7,368
Fee income	1,595		2,748		(1,153		)	4,758		5,397		(639		)
Other	580		165		415			1,078		1,038		40
Total operating revenues	$	435,989	$	412,186	$	23,803		$	1,262,893	$	1,204,222	$	58,671

The following table shows revenues for the three and nine months ended September 30, 2015 and 2014 for stabilized properties and pre-stabilized properties (all other properties) (in thousands).

	Stabilized							Pre-Stabilized
	Three Months Ended September 30,							Three Months Ended September 30,
	2015		2014		Change			2015		2014		Change
Rental	$	195,624	$	197,819	$	(2,195	)	$	142,706	$	119,245	$	23,461
Tenant reimbursements	56,410		56,981		(571		)	39,074		35,228		3,846
Fee income	855		1,229		(374		)	740		1,519		(779		)
Other	580		65		515			—		100		(100		)
Total operating revenues	$	253,469	$	256,094	$	(2,625	)	$	182,520	$	156,092	$	26,428

	Stabilized							Pre-stabilized
	Nine Months Ended September 30,							Nine Months Ended September 30,
	2015		2014		Change			2015		2014		Change
Rental	$	586,241	$	592,295	$	(6,054	)	$	401,931	$	343,975	$	57,956
Tenant reimbursements	162,203		166,482		(4,279		)	106,682		95,035		11,647
Fee income	2,598		3,306		(708		)	2,160		2,091		69
Other	1,078		65		1,013			—		973		(973		)
Total operating revenues	$	752,120	$	762,148	$	(10,028	)	$	510,773	$	442,074	$	68,699

Stabilized rental revenues and tenant reimbursement revenues decreased for the three and nine months ended September 30, 2015 compared to the same periods in 2014 primarily as a result of newly vacant space at certain properties along with the British pound sterling and Euro weakening against the U.S. dollar.

Pre-stabilized revenue increases were a result of new leases at our properties during the twelve months ended September 30, 2015, primarily leases of completed development space, the largest of which were for space at 44060 Digital Loudoun Plaza, 43940 Digital Loudoun Plaza, 29A International Business Park, Principal Park (Crawley) and 9355 Grand Avenue.

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Operating Expenses and Interest Expense

Operating expenses and interest expense during the three and nine months ended September 30, 2015 and 2014 were as follows (in thousands):

	Three Months Ended September 30,									Nine Months Ended September 30,
	2015			2014			Change			2015			2014			Change
Rental property operating and maintenance	$	140,538		$	130,894		$	9,644		$	394,640		$	375,586		$	19,054
Property taxes	19,953			25,765			(5,812		)	64,116			68,485			(4,369		)
Insurance	2,140			2,145			(5		)	6,449			6,463			(14		)
Change in fair value of contingent consideration	(1,594		)	(1,465		)	(129		)	(44,276		)	(4,102		)	(40,174		)
Depreciation and amortization	136,974			137,474			(500		)	397,571			405,186			(7,615		)
General and administrative	22,755			20,709			2,046			69,562			71,708			(2,146		)
Transactions	11,042			144			10,898			14,301			980			13,321
Impairment of investments in real estate	—			12,500			(12,500		)	—			12,500			(12,500		)
Other	51			1,648			(1,597		)	29			2,584			(2,555		)
Total operating expenses	$	331,859		$	329,814		$	2,045		$	902,392		$	939,390		$	(36,998	)
Interest expense	$	48,138		$	48,169		$	(31	)	$	139,718		$	144,689		$	(4,971	)

The following table shows expenses for the three and nine months ended September 30, 2015 and 2014 for stabilized properties and pre-stabilized properties (all other properties) (in thousands).

	Stabilized								Pre-stabilized
	Three Months Ended September 30,								Three Months Ended September 30,
	2015		2014			Change			2015			2014			Change
Rental property operating and maintenance	$	79,298	$	75,706		$	3,592		$	61,240		$	55,188		$	6,052
Property taxes	10,712		15,611			(4,899		)	9,241			10,154			(913		)
Insurance	1,434		1,453			(19		)	706			692			14
Change in fair value of contingent consideration	—		—			—			(1,594		)	(1,465		)	(129		)
Depreciation and amortization	74,934		80,114			(5,180		)	62,040			57,360			4,680
General and administrative (1)	22,755		20,709			2,046			—			—			—
Transactions (2)	—		—			—			11,042			144			10,898
Impairment of investments in real estate	—		—			—			—			12,500			(12,500		)
Other	81		(26		)	107			(30		)	1,674			(1,704		)
Total operating expenses	$	189,214	$	193,567		$	(4,353	)	$	142,645		$	136,247		$	6,398
Interest expense (3)	$	28,883	$	27,678		$	1,205		$	19,255		$	20,491		$	(1,236	)

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	Stabilized							Pre-stabilized
	Nine Months Ended September 30,							Nine Months Ended September 30,
	2015		2014		Change			2015			2014			Change
Rental property operating and maintenance	$	223,965	$	224,406	$	(441	)	$	170,675		$	151,180		$	19,495
Property taxes	37,790		43,361		(5,571		)	26,326			25,124			1,202
Insurance	4,327		4,366		(39		)	2,122			2,097			25
Change in fair value of contingent consideration	—		—		—			(44,276		)	(4,102		)	(40,174		)
Depreciation and amortization	224,782		238,148		(13,366		)	172,789			167,038			5,751
General and administrative (1)	69,562		71,708		(2,146		)	—			—			—
Transactions (2)	—		—		—			14,301			980			13,321
Impairment of investments in real estate	—		—		—			—			12,500			(12,500		)
Other	85		261		(176		)	(56		)	2,323			(2,379		)
Total operating expenses	$	560,511	$	582,250	$	(21,739	)	$	341,881		$	357,140		$	(15,259	)
Interest expense (3)	$	82,996	$	90,967	$	(7,971	)	$	56,722		$	53,722		$	3,000

(1) General and administrative expenses are included in stabilized properties as they are not allocable to specific properties.

(2) Transaction expenses are included entirely in pre-stabilized properties as they are not allocable to stabilized properties.

(3) Interest expense on our global revolving credit facility and unsecured term loan is recorded on a specific property basis.

Stabilized rental property operating and maintenance expenses increased approximately $3.6 million and decreased approximately $0.4 million in the three and nine months ended September 30, 2015, respectively, compared to the same periods in 2014 primarily as a result of a successful legal settlement in 2014 partially offset by the British pound sterling and Euro weakening against the U.S. dollar.

Stabilized property taxes decreased by approximately $4.9 million and $5.6 million in the three and nine months ended September 30, 2015, respectively, compared to the same periods in 2014, primarily as a result of successful appeals for taxes at two properties in Texas and one property in California within the stabilized pool.

Stabilized depreciation and amortization expense decreased approximately $5.2 million and $13.4 million in the three and nine months ended September 30, 2015, respectively, compared to the same periods in 2014, principally because of assets at certain properties being fully amortized during 2014 along with depreciation and amortization adjustments made in 2014.

General and administrative expenses increased by approximately $2.0 million in the three months ended September 30, 2015 compared to the same period in 2014 primarily due to the growth of our company, with an increase in headcount from 2014 to 2015, resulting in additional compensation, along with higher professional fees and marketing expenses. General and administrative expenses decreased by approximately $2.1 million in the nine months ended September 30, 2015 compared to the same period in 2014 primarily due to the $12.7 million severance related to the departure of our former Chief Executive Officer, Michael Foust, recorded in the nine months ended September 30, 2014 along with the reversal of excess severance expense of approximately $4.6 million in the three months ending September 30, 2015 upon settlement with Mr. Foust, partially offset by higher expenses in 2015 due to the growth of our company, with an increase in headcount from 2014 to 2015, resulting in additional compensation, along with higher professional fees and marketing expenses.

Stabilized interest expense increased approximately $1.2 million and decreased approximately $8.0 million for the three and nine months ended September 30, 2015, respectively, as compared to the same periods in 2014. The increase for the three-month periods was primarily a result of the issuance of the 2022 Notes in June 2015. The decrease for the nine-month periods was primarily a result of the redemption of the 2015 Notes in May 2015 and the redemption of the 2029 Debentures in April 2014 partially offset by the issuance of the 2022 Notes in June 2015.

Pre-stabilized rental property operating and maintenance expenses increased by approximately $6.1 million and $19.5 million in the three and nine months ended September 30, 2015, respectively, compared to the same periods in 2014 primarily as a result of higher consumption and utility rates in several of our properties along with development projects being placed into service leading to higher utility expense in 2015 along with general maintenance increases from completed inventory.

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Pre-stabilized property tax expense decreased approximately $0.9 million and increased approximately $1.2 million in the three and nine months ended September 30, 2015, respectively, compared to the same periods in 2014. The decrease for the three-month periods was primarily a result of successful appeals for taxes at one property in Texas and one property in Connecticut within the pre-stabilized pool. The increase for the nine-month periods was principally a result of reassessed value increases at five properties within the pre-stabilized pool.

Pre-stabilized depreciation and amortization expense increased approximately $4.7 million and $5.8 million in the three and nine months ended September 30, 2015, respectively, compared to the same periods in 2014, principally because of depreciation of development projects that were placed into service in late 2014 and during 2015.

Pre-stabilized interest expense decreased approximately $1.2 million for the three months ended September 30, 2015 as compared to the same period in 2014 primarily as a result of lower average outstanding debt balances due to the paydown of secured term debt in September 2014. Pre-stabilized interest expense increased approximately $3.0 million for the nine months ended September 30, 2015 as compared to the same period in 2014 primarily as a result of interest expense on our 2023 Notes, which were issued in April 2014.

Impairment of Investments in Real Estate

We have identified certain non-core investment properties we intend to sell as part of our capital recycling strategy. Our capital recycling program was designed to identify non-strategic and underperforming assets that can be sold to generate proceeds that will support the funding of our core investment activity. We expect our capital recycling initiative will likewise have a positive impact on overall return on invested capital. During this process, we evaluated the carrying value of certain investment properties identified for potential sale to ensure the carrying value is recoverable in light of a potentially shorter holding period. As a result of our evaluation, during the year ended December 31, 2014, we recognized $126.5 million of impairment losses on five properties located in the Central, East and West regions. As of September 30, 2015, three of these properties met the criteria to be classified as held for sale. During the nine months ended September 30, 2015, no additional impairment losses have been recognized.

Other income (expense)

Gain on Sale of Properties

During the nine months ended September 30, 2015, we recognized a gain on sale of properties of $94.3 million related to the dispositions of 100 Quannapowitt, which sold for $31.1 million in February 2015, 3300 East Birch Street, which sold for $14.2 million in March 2015 and 833 Chestnut Street, which sold for $160.8 million in April 2015.

Gain on Contribution of Properties to Unconsolidated Joint Ventures

During the three and nine months ended September 30, 2014, we recognized gains of $93.5 million and $95.4 million, respectively, related to the contribution of two properties to two unconsolidated joint ventures. The transactions generated net proceeds of approximately $178.9 million and we retained a 20% interest in each of the joint ventures.

Liquidity and Capital Resources of the Parent Company

In this “Liquidity and Capital Resources of the Parent Company” section and in the “Liquidity and Capital Resources of the Operating Partnership” section below, the term, our “parent company”, refers to Digital Realty Trust, Inc. on an unconsolidated basis, excluding our operating partnership.

Analysis of Liquidity and Capital Resources

Our parent company’s business is operated primarily through our operating partnership of which our parent company is the sole general partner and which it consolidates for financial reporting purposes. Because our parent company operates on a consolidated basis with our operating partnership, the section entitled “Liquidity and Capital Resources of the Operating Partnership” should be read in conjunction with this section to understand the liquidity and capital resources of our parent company on a consolidated basis and how our company is operated as a whole.

Our parent company issues public equity from time to time, but generally does not otherwise generate any capital itself or conduct any business itself, other than incurring certain expenses in operating as a public company which are fully reimbursed by the operating partnership. Our parent company itself does not hold any indebtedness other than guarantees of the indebtedness of our operating partnership and certain of its subsidiaries, and its only material asset is its ownership of partnership interests of our operating partnership. Therefore, the consolidated assets and liabilities and the consolidated

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revenues and expenses of our parent company and our operating partnership are the same on their respective financial statements, except for immaterial differences related to cash, other assets and accrued liabilities that arise from public company expenses paid by our parent company and an intercompany loan. However, all debt, other than the intercompany loan, is held directly or indirectly at the operating partnership level. Our parent company’s principal funding requirement is the payment of dividends on its common and preferred stock. Our parent company’s principal source of funding for its dividend payments is distributions it receives from our operating partnership.

As the sole general partner of our operating partnership, our parent company has the full, exclusive and complete responsibility for our operating partnership’s day-to-day management and control. Our parent company causes our operating partnership to distribute such portion of its available cash as our parent company may in its discretion determine, in the manner provided in our operating partnership’s partnership agreement. Our parent company receives proceeds from its equity issuances from time to time, but is generally required by our operating partnership’s partnership agreement to contribute the proceeds from its equity issuances to our operating partnership in exchange for partnership units of our operating partnership.

Our parent company is a well-known seasoned issuer with an effective shelf registration statement filed on April 20, 2015, which allows our parent company to register an unspecified amount of various classes of equity securities. As circumstances warrant, our parent company may issue equity from time to time on an opportunistic basis, dependent upon market conditions and available pricing. Any proceeds from such equity issuances would be generally contributed to our operating partnership in exchange for additional equity interests in our operating partnership. Our operating partnership may use the proceeds to acquire additional properties, to fund development opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt or equity securities.

The liquidity of our parent company is dependent on our operating partnership’s ability to make sufficient distributions to our parent company. The primary cash requirement of our parent company is its payment of dividends to its stockholders. Our parent company also guarantees our operating partnership’s, as well as certain of its subsidiaries’ and affiliates’, unsecured debt. If our operating partnership or such subsidiaries fail to fulfill their debt requirements, which trigger parent company guarantee obligations, then our parent company will be required to fulfill its cash payment commitments under such guarantees. However, our parent company’s only material asset is its investment in our operating partnership.

We believe our operating partnership’s sources of working capital, specifically its cash flow from operations, and funds available under its global revolving credit facility are adequate for it to make its distribution payments to our parent company and, in turn, for our parent company to make its dividend payments to its stockholders. However, we cannot assure you that our operating partnership’s sources of capital will continue to be available at all or in amounts sufficient to meet its needs, including making distribution payments to our parent company. The lack of availability of capital could adversely affect our operating partnership’s ability to pay its distributions to our parent company, which would in turn, adversely affect our parent company’s ability to pay cash dividends to its stockholders.

Digital Realty Trust, Inc. entered into equity distribution agreements in June 2011, which we refer to as the 2011 Equity Distribution Agreements, with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC, or the Agents, under which it can issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Agents as its sales agents. The sales of common stock made under the 2011 Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act. Cumulatively through September 30, 2015, Digital Realty Trust, Inc. has generated net proceeds of approximately $342.7 million from the issuance of approximately 5.7 million common shares under the 2011 Equity Distribution Agreements at an average price of $60.35 per share after payment of approximately $3.5 million of commissions to the sales agents and before offering expenses. No sales were made under the program during the nine months ended September 30, 2015 and 2014. As of September 30, 2015, shares of common stock having an aggregate offering price of $53.8 million remained available for offer and sale under the program.

On January 20, 2015, the operating partnership repaid $50.0 million of 4.57% Series D unsecured notes under the Prudential shelf facility at maturity.

On February 3, 2015, the operating partnership repaid $17.0 million of 4.50% Series F unsecured notes under the Prudential shelf facility at maturity.

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Telx Acquisition Financing

On July 20, 2015, our parent company completed an underwritten public offering of 10,500,000 shares of its common stock, all of which were offered in connection with forward sale agreements it entered into with certain financial institutions acting as forward purchasers. The forward purchasers borrowed and sold 10,500,000 shares of our parent company’s common stock in the public offering. We did not receive any proceeds from the sale of our common stock by the forward purchasers in the public offering. On October 8, 2015, our parent company physically settled in full the forward sale agreements by issuing an aggregate of 10,500,000 shares of its common stock to the forward counterparties in exchange for net proceeds of approximately $674.1 million. Our parent company used the net proceeds from the physical settlement of the forward sale agreements to fund a portion of the Telx Acquisition.

On August 24, 2015, our parent company issued an aggregate of 10,000,000 shares of its 6.350% Series I Cumulative Redeemable Preferred Stock for total net proceeds, after underwriting discounts and estimated offering expenses, of $241.7 million. Our parent company temporarily loaned the net proceeds from the offering to the operating partnership prior to using the net proceeds from the offering to fund a portion of the Telx Acquisition.

On October 1, 2015, Digital Delta Holdings, LLC, a Delaware limited liability company and then wholly owned subsidiary of Digital Realty Trust, Inc., issued $500.0 million aggregate principal amount of its 3.400% Notes due 2020 (the “3.400% 2020 Notes”) and $450.0 million aggregate principal amount of its 4.750% Notes due 2025 (the “4.750% 2025 Notes” and together with the 3.400% 2020 Notes, the “Delta Holdings Notes”), fully and unconditionally guaranteed by Digital Realty Trust, Inc. and Digital Realty Trust, L.P. The 3.400% 2020 Notes and 4.750% 2025 Notes bear interest at 3.400% and 4.750% per annum, respectively. Interest is payable on April 1 and October 1 of each year, beginning April 1, 2016, until the respective maturity dates of October 1, 2020 and October 1, 2025. Prior to the completion of the Operating Partnership Merger, the obligations under the Delta Holdings Notes were fully and unconditionally guaranteed by Digital Realty Trust, Inc. and the Operating Partnership. Upon the completion of the Operating Partnership Merger on October 13, 2015, Digital Realty Trust, L.P. became the direct obligor on the Delta Holdings Notes by operation of law. The net proceeds from the offering were used to fund a portion of the Telx Acquisition.

Future Uses of Cash

Our parent company may from time to time seek to retire, redeem or repurchase its equity or the debt securities of our operating partnership through cash purchases and/or exchanges for equity securities in open market purchases, privately negotiated transactions or otherwise. Such repurchases, redemptions or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions or other factors. The amounts involved may be material.

We are also subject to the commitments discussed below under “Dividends and Distributions.”

Dividends and Distributions

Our parent company is required to distribute 90% of its taxable income (excluding capital gains) on an annual basis in order for it to continue to qualify as a REIT for federal income tax purposes. Accordingly, our parent company intends to make, but is not contractually bound to make, regular quarterly distributions to its common stockholders from cash flow from our operating partnership’s operating activities. While historically our parent company has satisfied this distribution requirement by making cash distributions to its stockholders, it may choose to satisfy this requirement by making distributions of cash or other property. All such distributions are at the discretion of our parent company’s board of directors. Our parent company considers market factors and our operating partnership’s performance in addition to REIT requirements in determining distribution levels. Our parent company has distributed at least 100% of its taxable income annually since inception to minimize corporate level federal income taxes. Amounts accumulated for distribution to stockholders are invested primarily in interest-bearing accounts and short-term interest-bearing securities, which are consistent with our intention to maintain our parent company’s status as a REIT.

As a result of this distribution requirement, our operating partnership cannot rely on retained earnings to fund its on-going operations to the same extent that other companies whose parent companies are not REITs can. Our parent company may need to continue to raise capital in the debt and equity markets to fund our operating partnership’s working capital needs, as well as potential developments at new or existing properties, acquisitions or investments in existing or newly created joint ventures. In addition, our parent company may be required to use borrowings under our operating partnership’s global revolving credit facility, if necessary, to meet REIT distribution requirements and maintain our parent company’s REIT status.

Our parent company has declared and paid the following dividends on its common and preferred stock for the nine months ended September 30, 2015 (in thousands, except per share amounts):

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Date dividend declared	Dividend payment date	Series E Preferred Stock		Series F Preferred Stock		Series G Preferred Stock		Series H Preferred Stock		Common Stock
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	115,419
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		115,458
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		115,454
		$	15,093	$	9,069	$	11,016	$	20,190	$	346,331
Annual rate of dividend per share		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

Distributions out of our parent company’s current or accumulated earnings and profits are generally classified as dividends whereas distributions in excess of our company’s current and accumulated earnings and profits, to the extent of a stockholder’s U.S. federal income tax basis in our parent company’s stock, are generally classified as a return of capital. Distributions in excess of a stockholder’s U.S. federal income tax basis in our parent company’s stock are generally characterized as capital gain. Cash provided by operating activities has been generally sufficient to fund distributions on an annual basis; however, we may also need to utilize borrowings under the global revolving credit facility to fund distributions.

Liquidity and Capital Resources of the Operating Partnership

In this “Liquidity and Capital Resources of the Operating Partnership” section, the terms “we”, “our” and “us” refer to our operating partnership together with its consolidated subsidiaries or our operating partnership and our parent company together with their consolidated subsidiaries, as the context requires.

Analysis of Liquidity and Capital Resources

Our parent company is our sole general partner and consolidates our results of operations for financial reporting purposes. Because we operate on a consolidated basis with our parent company, the section entitled “Liquidity and Capital Resources of the Parent Company” should be read in conjunction with this section to understand our liquidity and capital resources on a consolidated basis.

As of September 30, 2015, we had $23.0 million of cash and cash equivalents, excluding $12.5 million of restricted cash. Restricted cash primarily consists of interest-bearing cash deposits required by the terms of several of our mortgage loans for a variety of purposes, including real estate taxes, insurance, anticipated or contractually obligated tenant improvements, as well as capital expenditures.

Our short-term liquidity requirements primarily consist of operating expenses, development costs and other expenditures associated with our properties, distributions to our parent company in order for it to make dividend payments on its preferred stock, distributions to our parent company in order for it to make dividend payments to its stockholders required to maintain its REIT status, distributions to the unitholders in our operating partnership, capital expenditures, debt service on our loans and, potentially, acquisitions. We expect to meet our short-term liquidity requirements through net cash provided by operations, restricted cash accounts established for certain future payments and by drawing upon our global revolving credit facility.

On August 15, 2013, we refinanced our global revolving credit facility, increasing the total borrowing capacity to $2.0 billion from $1.8 billion. The global revolving credit facility has an accordion feature that would enable us to increase the borrowing capacity of the credit facility to $2.55 billion, subject to the receipt of lender commitments and other conditions precedent. The refinanced facility matures on November 3, 2017, with twosix-month extension options available. The interest rate for borrowings under the expanded facility equals the applicable index plus a margin which is based on the credit ratings of our long-term debt and is currently 110 basis points. An annual facility fee on the total commitment amount of the facility, based on the credit rating of our long-term debt and currently 20 basis points, is payable quarterly. Funds may be drawn in U.S., Canadian, Singapore, Australian and Hong Kong dollars, as well as Euro, British pound sterling, Swiss franc, Japanese yen and Mexican peso denominations. As of September 30, 2015, borrowings under the global revolving credit facility bore interest at an overall blended rate of 1.63% comprised of 1.29% (U.S. dollars), 1.62% (British pound sterling), 1.00% (Euros), 3.15% (Australian dollars), 1.36% (Hong Kong dollars), 1.13% (Japanese yen), 2.42% (Singapore dollar) and 1.86% (Canadian dollars). The interest rates are based on 1-month LIBOR, 1-month GBP LIBOR, 1-month EURIBOR, 1-month BBR, 1-month HIBOR, 1-month JPY LIBOR, 1-month SOR and 1-month CDOR, respectively, plus a margin of 1.10%. The facility also bore a base borrowing rate of 3.35% (USD) which is based on U.S. Prime Rate plus a margin of 0.10%. We have used and intend to

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use borrowings under the global revolving credit facility to acquire additional properties, fund development opportunities and to provide for working capital and other corporate purposes, including potentially for the repurchase, redemption or retirement of outstanding debt or equity securities. As of September 30, 2015, we have capitalized approximately $18.0 million of financing costs related to the global revolving credit facility. As of September 30, 2015, approximately $689.0 million was drawn under this facility and $5.5 million of letters of credit were issued, leaving approximately $1.2 billion available for use.

On August 15, 2013, we refinanced the senior unsecured multi-currency term loan facility, increasing its total borrowing capacity to $1.0 billion from $750.0 million. Pursuant to the accordion feature total commitments can be increased to $1.1 billion, subject to the receipt of lender commitments and other conditions precedent. The facility matures on April 16, 2017, with twosix-month extension options available. Interest rates are based on our senior unsecured debt ratings and are currently 120 basis points over the applicable index for floating rate advances. Funds may be drawn in U.S., Singapore and Australian dollars, as well as Euro and British pound sterling denominations with the option to add Hong Kong dollars and Japanese yen upon an accordion exercise. Based on exchange rates in effect at September 30, 2015, the balance outstanding is approximately $938.3 million. We have used borrowings under the term loan for acquisitions, repayment of indebtedness, development, working capital and general corporate purposes. As of September 30, 2015, we have capitalized approximately $8.4 million of financing costs related to the unsecured term loan.

For a discussion of the potential impact of current global economic and market conditions on our liquidity and capital resources, see “—Factors Which May Influence Future Results of Operations—Global market and economic conditions” above.

Our parent company commenced its At-the-Market equity distribution program in June 2011, which is discussed under “Liquidity and Capital Resources of the Parent Company” above. To date, our parent company has generated net proceeds of approximately $342.7 million from the issuance of approximately 5.7 million shares of common stock under the program at an average price of $60.35 per share after payment of approximately $3.5 million of commissions to the sales agents before offering expenses. The proceeds from the issuances were contributed to us in exchange for the issuance of approximately 5.7 million common units to our parent company. No sales were made under the program during the nine months ended September 30, 2015 and 2014. As of September 30, 2015, shares of common stock having an aggregate offering price of $53.8 million remained available for offer and sale under the program.

On February 5, 2015, the operating partnership sold the 100 Quannapowitt property for approximately $31 million. The transaction after costs resulted in net proceeds of approximately $29 million and a net gain of approximately $10 million. The property was identified as held for sale as of December 31, 2014. 100 Quannapowitt was not a significant component of our U.S. portfolio nor does the sale represent a significant shift in our strategy.

On March 31, 2015, the operating partnership sold the 3300 East Birch Street property for approximately $14 million. The transaction after costs resulted in net proceeds of approximately $14 million and a net gain of approximately $8 million. The property was identified as held for sale as of December 31, 2014. 3300 East Birch Street was not a significant component of our U.S. portfolio nor does the sale represent a significant shift in our strategy.

On April 30, 2015, the operating partnership sold the 833 Chestnut Street property for approximately $161 million. The transaction after costs and buyer credits resulted in net proceeds of approximately $159 million, including a $9 million note receivable, and a net gain of approximately $77 million. The property was identified as held for sale as of March 31, 2015. 833 Chestnut Street was not a significant component of our U.S. portfolio nor does the sale represent a significant shift in our strategy.

On May 26, 2015, the operating partnership redeemed $375.0 million, the entire outstanding principal amount, of its 2015 Notes, at a redemption price of 100% of the principal amount of the 2015 Notes plus accrued and unpaid interest thereon up to, but excluding, the redemption date.

On June 23, 2015, the operating partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum. The public offering price was 99.236% of the principal amount. The 3.950% 2022 Notes are general unsecured senior obligations of the operating partnership, rank equally in right of payment with all other senior unsecured indebtedness of the operating partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 3.950% 2022 Notes is payable on January 1 and July 1 of each year, beginning on January 1, 2016. The net proceeds from the offering after deducting the original issue discount of approximately $3.8 million and underwriting commissions and expenses of approximately $4.4 million was approximately $491.8 million. The operating partnership will use the net proceeds from the offering of the notes to fund certain eligible green projects, including the development and redevelopment of such projects. Pending such uses, the operating partnership temporarily repaid borrowings under its global revolving credit facility.

On October 13, 2015, upon the consummation of the Operating Partnership Merger, our operating partnership became the direct obligor on the $950.0 million in aggregate principal amount of Delta Holdings Notes by operation of law.

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The growing acceptance by private institutional investors of the data center asset class has generally pushed capitalization rates lower; as such private investors typically have lower return expectations than us. As a result, we anticipate that near-term acquisitions activity will comprise a smaller percentage of our growth until seller price expectations realign with our return requirements.

Construction

The table below summarizes our construction in progress (included in investments in real estate) as of September 30, 2015 and December 31, 2014:

	As of September 30, 2015							As of December 31, 2014
(dollars in thousands)	Net Rentable Square Feet	Current Investment (2)		Future Investment (3)		Total Cost		Net Rentable Square Feet	Current Investment (4)		Future Investment (3)		Total Cost
Development Lifecycle
Development Construction in Progress
Space Held for Development	1,253,308	$	244,112	$	—	$	244,112	1,174,957	$	245,985	$	—	$	245,985
Base Building Construction	803,022	91,679		116,423		208,102		688,517	147,126		69,438		216,564
Datacenter Construction	582,293	206,410		293,533		499,943		616,336	365,837		348,997		714,834
Equipment Pool & Other Inventory		11,875		—		11,875			21,623		—		21,623
Campus, Tenant Improvements & Other		16,522		22,381		38,903			28,835		7,998		36,833
Total Development Construction in Progress	2,638,623	570,598		432,337		1,002,935		2,479,810	809,406		426,433		1,235,839
Land Inventory	(1)	133,343		—		133,343		(1)	145,607		—		145,607
Enhancement & Other		6,414		3,412		9,826			50,305		42,180		92,485
Recurring		19,705		71,548		91,253			9,844		27,147		36,991
Total Construction in Progress		$	730,060	$	507,297	$	1,237,357		$	1,015,162	$	495,760	$	1,510,922

(1) Represents approximately 167 acres as of September 30, 2015 and approximately 178 acres as of December 31, 2014.

(2) Represents balances incurred through September 30, 2015 and included in building and improvements in the condensed consolidated balance sheets.

(3) Represents estimated cost to complete specific scope of work pursuant to contract, budget or approved capital plan.

(4) Represents balances incurred through December 31, 2014 and included in building and improvements in the condensed consolidated balance sheets.

Land inventory and space held for development reflect cumulative cost spent pending future development. Base building construction consists of ongoing improvements to building infrastructure in preparation for future datacenter fit-out. Datacenter construction includes 0.6 million square feet of Turn Key Flex^®, Powered Base Building^®, and Custom Solutions product with a cost to date of approximately $206.4 million. Generally, we expect to deliver the space within 12 months; however, lease commencement dates may significantly impact final delivery schedules. Equipment pool and other inventory represent the value of long-lead equipment and materials required for timely deployment and delivery of datacenter construction fit-out. Campus, tenant improvements and other costs include the value of development work which benefits space recently converted to our operating portfolio and is composed primarily of shared infrastructure projects and first-generation tenant improvements.

Future Uses of Cash

Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements. As of September 30, 2015, we had approximately 1.4 million square feet of space under active development and approximately 1.3 million square feet of space held for future development and we also owned approximately 0.6 million net rentable square feet of datacenter space with extensive installed tenant improvements. Turn-Key Flex^® space is move-in-ready space for the placement of computer and network equipment required to provide a datacenter environment. Depending on demand for additional Turn-Key Flex^® space, we expect to incur significant tenant improvement costs to build out and develop these types of spaces. At September 30, 2015, the approximate 1.4 million square feet of space under active development was under construction for Turn-Key Flex^®, Powered Base Building^® and Custom Solutions products, all of which are expected to be income producing on or after completion, in three U.S. domestic metropolitan areas, two European metropolitan areas, one Canadian metropolitan area, one Australian metropolitan area and one Singapore metropolitan area, consisting of

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approximately 0.8 million square feet of base building construction and 0.6 million square feet of data center construction. At September 30, 2015, we had commitments under construction contracts for approximately $135.6 million. We currently expect to incur approximately $150.0 million to $200.0 million of capital expenditures for our development programs during the three months ending December 31, 2015, although this amount may increase or decrease, potentially materially, based on numerous factors, including changes in demand, leasing results and availability of debt or equity capital.

Historical Capital Expenditures (Cash Basis)

The table below summarizes our capital expenditure activity for the nine months September 30, 2015 and 2014 (in thousands):

	Nine Months Ended September 30,
	2015		2014
Development projects (1)	$	384,726	$	517,368
Enhancement and improvements (1)	10,181		48,144
Recurring capital expenditures (1)	56,490		31,521
Total capital expenditures (excluding indirect costs)	$	451,397	$	597,033

(1) Beginning in the first quarter of 2015, we changed the presentation of certain capital expenditures. Infrequent expenditures for capitalized replacements and upgrades are now categorized as recurring capital expenditures (categorized as enhancements and improvements in 2014). First-generation leasing costs are now classified as part of development projects (categorized as recurring capital expenditures in 2014).

For the nine months ended September 30, 2015, total capital expenditures decreased $145.6 million to approximately $451.4 million from $597.0 million for the same period in 2014. Capital expenditures on our development projects plus our enhancement and improvements projects for the nine months ended September 30, 2015 were approximately $394.9 million, which reflects a decrease of approximately 30% from the same period in 2014. This decrease was primarily due to completion of and decreased spending for ground-up Custom Solutions projects, Turn-Key Flex and base building improvements. Our development capital expenditures are generally funded by our available cash and equity and debt capital.

Indirect costs, including capitalized interest, capitalized in the nine months ended September 30, 2015 and 2014 were $49.7 million and $52.8 million, respectively. Capitalized interest comprised approximately $9.9 million and $15.6 million, respectively, of the total indirect costs capitalized for the nine months ended September 30, 2015 and 2014. Capitalized interest in the nine months ended September 30, 2015 decreased compared to the same period in 2014 due to a reduction in qualifying activities. Excluding capitalized interest, the increase in indirect costs in the nine months ended September 30, 2015 compared to the same period in 2014 was primarily due to capitalized amounts relating to compensation expense of employees directly engaged in construction and leasing activities. See “—Future Uses of Cash” above for a discussion of the amount of capital expenditures we expect to incur during the year ending December 31, 2015.

The environmental cleanup work required at the 47700 Kato Road and 1055 Page Avenue property resulting from a prior tenant’s activities has been substantially completed. The prior tenant of these buildings completed most of the remaining required environmental cleanup work.  We intend to seek recovery of past costs incurred for previous environmental cleanup work, as well as other damages.  We cannot at this time estimate the likelihood of recovery or the impact on our financial condition and results of operations, however, the amounts are not expected to be material.

We are also subject to the commitments discussed below under “Commitments and Contingencies,” “Off-Balance Sheet Arrangements” and “Distributions.”

Consistent with our growth strategy, we actively pursue opportunities for potential acquisitions, with due diligence and negotiations often at different stages at different times. The dollar value of acquisitions for the year ending December 31, 2015 will be based on numerous factors, including tenant demand, leasing results, availability of debt or equity capital and acquisition opportunities.

We may from time to time seek to retire or repurchase our outstanding debt or the equity of our parent company through cash purchases and/or exchanges for equity securities of our parent company in open market purchases, privately negotiated transactions or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions or other factors. The amounts involved may be material.

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We expect to meet our short- and long-term liquidity requirements, including to pay for scheduled debt maturities and to fund property acquisitions and non-recurring capital improvements, with net cash from operations, future long-term secured and unsecured indebtedness and the issuance of equity and debt securities and the proceeds of equity issuances by our parent company. We also may fund future short- and long-term liquidity requirements, including property acquisitions and non-recurring capital improvements, using our global revolving credit facility pending permanent financing. If we are not able to obtain additional financing on terms attractive to us, or at all, including as a result of the circumstances described above under “Factors Which May Influence Future Results of Operations—Global market and economic conditions”, we may be required to reduce our acquisition or capital expenditure plans, which could have a material adverse effect upon our business and results of operations.

Distributions

All distributions on our units are at the discretion of our parent company’s board of directors. During the nine months ended September 30, 2015, our operating partnership declared and paid the following distributions (in thousands, except per unit amounts):

Date distribution declared	Distribution payment date	Series E Preferred Units		Series F Preferred Units		Series G Preferred Units		Series H Preferred Units		Common Units
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	117,896
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		117,938
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		117,962
		$	15,093	$	9,069	$	11,016	$	20,190	$	353,796
Annual rate of distribution per unit		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

Commitments and Contingencies

As part of the acquisition of 29A International Business Park, an asset acquisition in 2010, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined in the agreements for the acquisition. As of December 31, 2014, certain leases executed subsequent to the acquisition caused an amount to become probable of payment and therefore approximately $12.4 million had been accrued in accounts payable and accrued liabilities and capitalized to buildings and improvements in the condensed consolidated balance sheet as of December 31, 2014 and an earnout payment was made during the three months ended June 30, 2015 in the amount of $17.5 million SGD (or approximately $13.0 million based on the exchange rate on the date of payment). As of September 30, 2015, $18.9 million had been accrued and capitalized for additional earnout payments. The second and third tranches of the earnout payments are forecasted to be made in 2016 and 2020, respectively. The maximum amount that could be earned by the seller is $50.0 million SGD (or approximately $35.2 million based on the exchange rate as of September 30, 2015). The earnout contingency expires in November 2020.

One of the tenants at our Convergence Business Park property has an option to expand as part of their lease agreement, which expires in April 2017. As part of this option, development activities were not permitted on specifically identified expansion space within the property until April 2014. From April 2014 through April 2017, the tenant has the right of first refusal on any third party’s bona fide offer to buy the adjacent land. If the tenant exercises their option, we may either construct and lease to the tenant an additional shell building on the expansion space at a stipulated rate of return on cost or sell the existing building and the expansion space to the tenant for a price of approximately $24.0 million and $225,000 per square acre, respectively, plus additional adjustments as provided in the lease.

As part of the acquisition of the Sentrum Portfolio in July 2012, the seller could earn additional consideration based on future net returns on vacant space to be developed, but not currently leased, as defined in the purchase agreement for the acquisition. The initial estimate of fair value of contingent consideration was approximately £56.5 million (or approximately $87.6 million based on the exchange rate as of July 11, 2012, the acquisition date). We have adjusted the contingent consideration to fair value at each reporting date with changes in fair value recognized in operating income. During the nine months ended September 30, 2015, we reduced the fair value by approximately £30.3 million. The adjustment was the result of an evaluation by management that no additional leases would be executed for vacant space by July 11, 2015, the contingency expiration date. The final payment on the earnout was made in August 2015. We made earnout payments of approximately £6.2 million (or approximately $10.3 million based on the exchange rates as of the date of each payment) during the nine months ended September 30, 2014. We made earnout payments of approximately £0.7 million (or approximately $1.1 million based on the exchange rates as of the date of each payment) during the nine months ended September 30, 2015. The change in fair value of

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contingent consideration for Sentrum was recorded as an increase to operating expense of approximately $0 and $1.5 million for the three months ended September 30, 2015 and 2014, respectively. The change in fair value of contingent consideration for Sentrum was recorded as a reduction to operating expense of approximately $43.0 million and $4.1 million for the nine months ended September 30, 2015 and 2014, respectively.

On July 22, 2015, we entered into a settlement agreement with former Chief Executive Officer Michael Foust, pursuant to which the parties acknowledged the cancellation of 127,644 profits interest units in the operating partnership held by Mr. Foust, and we agreed to pay Mr. Foust $8.0 million in full satisfaction of any and all amounts owing to Mr. Foust as a result of his employment with the company and the termination thereof. In connection with the settlement, Mr. Foust and the company agreed to dismiss with prejudice the litigation between the parties relating to Mr. Foust’s employment and termination of employment, and each party released claims against the other party. We previously recorded an expense of approximately $12.7 million in connection with Mr. Foust’s severance payments and reversed the excess expense of approximately $4.6 million in the three months ending September 30, 2015 as a reduction to general and administrative expense in the condensed and consolidated income statement. 

As of September 30, 2015, we were a party to interest rate swap agreements which hedge variability in cash flows related the U.S. LIBOR and SGD-SOR based tranches of the unsecured term loan. Under these swaps, we pay variable-rate amounts in exchange for fixed-rate payments over the life of the agreements without exchange of the underlying principal amounts. See Item 3. “Quantitative and Qualitative Disclosures about Market Risk.”

Outstanding Consolidated Indebtedness

The table below summarizes our debt, as of September 30, 2015 (in millions):

Debt Summary:
Fixed rate	$	3,121.4
Variable rate debt subject to interest rate swaps	469.1
Total fixed rate debt (including interest rate swaps)	3,590.5
Variable rate—unhedged	1,158.1
Total	$	4,748.6
Percent of Total Debt:
Fixed rate (including swapped debt)	75.6		%
Variable rate	24.4		%
Total	100.0		%
Effective Interest Rate as of September 30, 2015(1):
Fixed rate (including hedged variable rate debt)	4.46		%
Variable rate	1.76		%
Effective interest rate	3.80		%

(1) Excludes impact of deferred financing cost amortization.

As of September 30, 2015, we had approximately $4.7 billion of outstanding consolidated long-term debt as set forth in the table above. Our ratio of debt to total enterprise value was approximately 31% (based on the closing price of Digital Realty Trust, Inc.’s common stock on September 30, 2015 of $65.32). For this purpose, our total enterprise value is defined as the sum of the market value of Digital Realty Trust, Inc.’s outstanding common stock (which may decrease, thereby increasing our debt to total enterprise value ratio), excluding options issued under our incentive award plan, plus the liquidation value of Digital Realty Trust, Inc.’s preferred stock, plus the aggregate value of our operating partnership’s units not held by Digital Realty Trust, Inc. (with the per unit value equal to the market value of one share of Digital Realty Trust, Inc.’s common stock and excluding long-term incentive units, Class C Units and Class D Units), plus the book value of our total consolidated indebtedness.

The variable rate debt shown above bears interest at interest rates based on various one-month LIBOR, EURIBOR, GBP LIBOR, SOR, BBR, HIBOR, JPY LIBOR, CDOR and U.S. Prime rates, depending on the respective agreement governing the debt, including our global revolving credit facility and unsecured term loan. As of September 30, 2015, our debt had a weighted average term to initial maturity of approximately 4.7 years (or approximately 5.0 years assuming exercise of extension options).

Off-Balance Sheet Arrangements

As of September 30, 2015, we were party to interest rate swap agreements related to $469.1 million of outstanding principal on our variable rate debt. See Item 3. “Quantitative and Qualitative Disclosures about Market Risk.”

As of September 30, 2015, our pro-rata share of debt of unconsolidated joint ventures was approximately $137.2 million, of which $54.5 million is subject to interest rate swap agreements.

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Cash Flows

The following summary discussion of our cash flows is based on the condensed consolidated statements of cash flows and is not meant to be an all-inclusive discussion of the changes in our cash flows for the periods presented below.

Comparison of Nine Months Ended September 30, 2015 to Nine Months Ended September 30, 2014

The following table shows cash flows and ending cash and cash equivalent balances for the nine months ended September 30, 2015 and 2014 (in thousands).

	Nine Months Ended September 30,
	2015			2014			Change
Net cash provided by operating activities	$	539,207		$	472,567		$	66,640
Net cash used in investing activities	(425,241		)	(464,886		)	39,645
Net cash used in financing activities	(125,782		)	(26,834		)	(98,948		)
Net decrease in cash and cash equivalents	$	(11,816	)	$	(19,153	)	$	7,337

The increase in net cash provided by operating activities was due to increased cash flows from new leasing at our stabilized properties and completed and leased development space, which was partially offset by increased operating and interest expenses.

Net cash used in investing activities decreased for the nine months ended September 30, 2015, primarily as a result of a decrease in cash paid for capital expenditures for the nine months ended September 30, 2015 ($535.1 million) as compared to the same period in 2014 ($644.6 million) along with an increase in net proceeds from the sale of properties for the nine months ended September 30, 2015 ($185.6 million) as compared to the same period in 2014 ($37.9 million) offset by cash paid for acquisitions for the nine months ended September 30, 2015 ($48.4 million).

Net cash flows provided by financing activities for the company consisted of the following amounts (in thousands).

	Nine Months Ended September 30,
	2015			2014			Change
Repayment of borrowings, net of proceeds	$	(330,436	)	$	(374,934	)	$	44,498
Net proceeds from issuance of common and preferred stock,    including exercise of stock options	244,864			353,316			(108,452		)
Net proceeds from 2023 Notes	—			495,872			(495,872		)
Net proceeds from 2022 Notes	496,190			—			496,190
Dividend and distribution payments	(524,180		)	(490,745		)	(33,435		)
Other	(12,220		)	(10,343		)	(1,877		)
Net cash used in financing activities	$	(125,782	)	$	(26,834	)	$	(98,948	)

The increase in net cash used in financing activities was primarily due to the issuance of our series H preferred stock (net proceeds of $353.3 million) in March and April 2014 and the issuance of our 2023 Notes (net proceeds of $495.9 million) in April 2014 partially offset by lower net repayments during the nine months ended September 30, 2015 (net repayments of $330.4 million) as compared to the nine months ended September 30, 2014 (net repayments of $374.9 million) along with the issuance of our 2022 Notes (net proceeds of $496.2 million) in June 2015. The increase in dividend and distribution payments for the nine months ended September 30, 2015 as compared to the same period in 2014 was due to an increase in the number of shares outstanding and dividend amount per share of common stock in 2015 as compared to 2014 and the payment of dividends on our series H preferred stock during the nine months ended September 30, 2015, whereas this series of preferred stock was not outstanding for the entire portion of the nine months ended September 30, 2014.

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Net cash flows provided by financing activities for the operating partnership consisted of the following amounts (in thousands).

	Nine Months Ended September 30,
	2015			2014			Change
Repayment of borrowings, net of proceeds	$	(330,436	)	$	(374,934	)	$	44,498
General partner contributions, net	2,175			353,316			(351,141		)
Due to Parent	242,689			—			242,689
Net proceeds from 2023 Notes	—			495,872			(495,872		)
Net proceeds from 2022 Notes	496,190			—			496,190
Distribution payments	(524,180		)	(490,745		)	(33,435		)
Other	(12,220		)	(10,343		)	(1,877		)
Net cash used in financing activities	$	(125,782	)	$	(26,834	)	$	(98,948	)

The increase in net cash used in financing activities was primarily due to the higher general partner contributions in 2014 in connection with Digital Realty Trust, Inc.’s series H preferred stock offering in March and April 2014 (net proceeds of $353.3 million) along with the issuance of our 2023 Notes (net proceeds of $495.9 million) in April 2014 partially offset by lower net repayments during the nine months ended September 30, 2015 (net repayments of $330.4 million) as compared to the nine months ended September 30, 2014 (net repayments of $374.9 million) along with the issuance of our 2022 Notes (net proceeds of $496.2 million) in June 2015. The increase in distribution payments for the nine months ended September 30, 2015 as compared to the same period in 2014 was due to an increase in the number of units outstanding and distribution amount per common unit in 2015 as compared to 2014 and the payment of distributions on our series H preferred units during the nine months ended September 30, 2015, whereas this series of preferred units was not outstanding for the entire portion of the nine months ended September 30, 2014.

Noncontrolling Interests in Operating Partnership

Noncontrolling interests relate to the common units in our operating partnership that are not owned by Digital Realty Trust, Inc., which, as of September 30, 2015, amounted to 2.0% of our operating partnership common units. In conjunction with our formation, our operating partnership issued common units to third party sellers in connection with our acquisition of real estate interests from such third parties.

Limited partners who acquired common units in connection with our formation have the right to require our operating partnership to redeem part or all of their common units for cash based upon the fair market value of an equivalent number of shares of Digital Realty Trust, Inc. common stock at the time of the redemption. Alternatively, we may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to registration rights agreements we entered into with third party contributors, we filed a shelf registration statement covering the issuance of the shares of our common stock issuable upon redemption of the common units, and the resale of those shares of common stock by the holders.

Inflation

Many of our leases provide for separate real estate tax and operating expense escalations. In addition, many of the leases provide for fixed base rent increases. We believe that inflationary increases may be at least partially offset by the contractual rent increases and expense escalations described above.

Funds from Operations

We calculate Funds from Operations, or FFO, in accordance with the standards established by the National Association of Real Estate Investment Trusts, or NAREIT. FFO represents net income (loss) available to common stockholders (computed in accordance with U.S. GAAP), excluding gains (or losses) from sales of property, impairment charges, real estate related depreciation and amortization (excluding amortization of deferred financing costs) and after adjustments for unconsolidated partnerships and joint ventures. Management uses FFO as a supplemental performance measure because, in excluding real estate related depreciation and amortization and gains and losses from property dispositions, it provides a performance measure that, when compared year over year, captures trends in occupancy rates, rental rates and operating costs. We also believe that, as a widely recognized measure of the performance of REITs, FFO will be used by investors as a basis to compare our operating performance with that of other REITs. However, because FFO excludes depreciation and amortization and captures neither the changes in the value of our properties that result from use or market conditions, nor the level of capital expenditures and leasing commissions necessary to maintain the operating performance of our properties, all of which have real economic

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effect and could materially impact our financial condition and results from operations, the utility of FFO as a measure of our performance is limited. Other REITs may not calculate FFO in accordance with the NAREIT definition and, accordingly, our FFO may not be comparable to such other REITs’ FFO. Accordingly, FFO should be considered only as a supplement to net income computed in accordance with GAAP as a measure of our performance.

Reconciliation of Net Income Available to Common Stockholders to Funds From Operations (FFO)

(unaudited, in thousands, except per share data)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Net income available to common stockholders	$	38,522		$	109,314		$	257,305		$	185,010
Adjustments:
Noncontrolling interests in operating partnership	747			2,272			5,150			3,838
Real estate related depreciation and amortization (1)	135,613			136,289			393,634			401,723
Real estate related depreciation and amortization related to investment in unconsolidated joint ventures	2,760			1,934			8,551			5,364
Impairment of investments in real estate	—			12,500			—			12,500
Gain on sale of properties	207			—			(94,282		)	(15,945		)
Gain on contribution of properties to unconsolidated joint ventures	—			(93,498		)	—			(95,404		)
FFO available to common stockholders and unitholders (2)	$	177,849		$	168,811		$	570,358		$	497,086
Basic FFO per share and unit	$	1.28		$	1.22		$	4.12		$	3.67
Diluted FFO per share and unit (2)	$	1.28		$	1.22		$	4.10		$	3.63
Weighted average common stock and units outstanding
Basic	138,468			138,308			138,481			135,382
Diluted (2)	139,192			138,762			139,051			138,217
(1)    Real estate related depreciation and amortization was computed as follows:
Depreciation and amortization per income statement	136,974			137,474			397,571			405,186
Non-real estate depreciation	(1,361		)	(1,185		)	(3,937		)	(3,463		)
	$	135,613		$	136,289		$	393,634		$	401,723

(2) For all periods presented, we have excluded the effect of dilutive series E, series F, series G and series H preferred stock, as applicable, that may be converted upon the occurrence of specified change in control transactions as described in the articles supplementary governing the series E, series F, series G and series H preferred stock, as applicable, which we consider highly improbable. In addition, the 5.50% exchangeable senior debentures due 2029 were exchangeable for 0 and 2,618 common shares on a weighted average basis for the three and nine months ended September 30, 2014, respectively. See below for calculations of diluted FFO available to common stockholders and unitholders and weighted average common stock and units outstanding.

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	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
FFO available to common stockholders and unitholders	$	177,849	$	168,811	$	570,358	$	497,086
Add: 5.50% exchangeable senior debentures interest expense	—		—		—		4,725
FFO available to common stockholders and unitholders—diluted	$	177,849	$	168,811	$	570,358	$	501,811
Weighted average common stock and units outstanding	138,468		138,308		138,481		135,382
Add: Effect of dilutive securities (excluding 5.50% exchangeable senior debentures)	724		454		570		217
Add: Effect of dilutive 5.50% exchangeable senior debentures	—		—		—		2,618
Weighted average common stock and units outstanding—diluted	139,192		138,762		139,051		138,217

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our future income, cash flows and fair values relevant to financial instruments depend upon prevalent market interest rates. Market risk refers to the risk of loss from adverse changes in market prices and interest rates. We do not use derivatives for trading or speculative purposes and only enter into contracts with major financial institutions based on their credit rating and other factors.

Analysis of Debt between Fixed and Variable Rate

We use interest rate swap agreements and fixed rate debt to reduce our exposure to interest rate movements. As of September 30, 2015, our consolidated debt was as follows (in millions):

	Carrying Value		Estimated Fair Value
Fixed rate debt	$	3,121.4	$	3,282.5
Variable rate debt subject to interest rate swaps	469.1		469.1
Total fixed rate debt (including interest rate swaps)	3,590.5		3,751.6
Variable rate debt	1,158.1		1,158.1
Total outstanding debt	$	4,748.6	$	4,909.7

Interest rate derivatives included in this table and their fair values as of September 30, 2015 and December 31, 2014 were as follows (in thousands):

Notional Amount											Fair Value at Significant Other Observable Inputs (Level 2)
As of September 30, 2015				As of December 31, 2014			Type of Derivative	Strike Rate	Effective Date	Expiration Date	As of September 30, 2015			As of December 31, 2014
Currently-paying contracts
$	335,905	(1	)	$	410,905	(1)	Swap	0.717	Various	Various	$	(1,502	)	$	(241	)
133,237		(2	)	142,965		(2)	Swap	0.925	July 17, 2012	April 18, 2017	1,435			669
469,142				553,870							(67		)	428
Forward-starting contracts
—		(3	)	150,000			Forward-starting Swap	2.091	July 15, 2014	July 15, 2019	—			(2,837		)
Total
$	469,142			$	703,870						$	(67	)	$	(2,409	)

(1) Represents the U.S. dollar tranche of the unsecured term loan.

(2) Represents a portion of the Singapore dollar tranche of the unsecured term loan. Translation to U.S. dollars is based on exchange rate of $0.70 to 1.00 SGD as of September 30, 2015 and $0.75 to 1.00 SGD as of December 31, 2014.

(3) In January 2014, we entered into a forward-starting five-year swap contract to protect against adverse fluctuations in interest rates by reducing our exposure to variability in cash flows relating to interest payments on a forecasted issuance of debt. The accrual period of the swap contract was designed to match the tenor of the planned debt issuance. In the fourth quarter of 2014, changes in the forecasted transaction resulted in the discontinuation of cash flow hedge accounting. As such, changes in the fair value of the forward starting swap were recognized in earnings, within the other income (expense) line item. During the three months ended March 31, 2015, the total net loss recognized on the forward starting swap was approximately $1.6 million, and on January 13, 2015, we cash settled the forward starting swap for approximately $5.7 million, including accrued interest.

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Sensitivity to Changes in Interest Rates

The following table shows the effect if assumed changes in interest rates occurred, based on fair values and interest expense as of September 30, 2015:

Assumed event	Interest rate change (basis points)		Change ($ millions)
Increase in fair value of interest rate swaps following an assumed 10% increase in interest rates	9		$	0.7
Decrease in fair value of interest rate swaps following an assumed 10% decrease in interest rates	(9	)	(0.7		)
Increase in annual interest expense on our debt that is variable rate and not subject to swapped interest following a 10% increase in interest rates	9		1.1
Decrease in annual interest expense on our debt that is variable rate and not subject to swapped interest following a 10% decrease in interest rates	(9	)	(1.1		)
Increase in fair value of fixed rate debt following a 10% decrease in interest rates	(9	)	20.4
Decrease in fair value of fixed rate debt following a 10% increase in interest rates	9		(18.4		)

Interest risk amounts were determined by considering the impact of hypothetical interest rates on our financial instruments. These analyses do not consider the effect of any change in overall economic activity that could occur in that environment. Further, in the event of a change of that magnitude, we may take actions to further mitigate our exposure to the change. However, due to the uncertainty of the specific actions that would be taken and their possible effects, these analyses assume no changes in our financial structure.

Foreign Currency Exchange Risk

For the nine months ended September 30, 2015 and 2014, we had foreign operations in the United Kingdom, Ireland, France, The Netherlands, Switzerland, Canada, Singapore, Australia, Hong Kong and Japan, and, as such, are subject to risk from the effects of exchange rate movements of foreign currencies, which may affect future costs and cash flows. Our foreign operations are conducted in the British pound sterling, Euro, Swiss franc, Canadian dollar, Singapore dollar, Australian dollar, Hong Kong dollar and the Japanese yen. Our primary currency exposures are to the British pound sterling, Euro and the Singapore dollar. We attempt to mitigate a portion of the risk of currency fluctuation by financing our investments in the local currency, although there can be no assurance that this will be effective. As a result, changes in the relation of any such foreign currency to U.S. dollars may affect our revenues, operating margins and distributions and may also affect the book value of our assets and the amount of stockholders’ equity. For the three months ended September 30, 2015 and 2014, operating revenues from properties outside the United States contributed $101.4 million and $97.3 million, respectively, which represented 23.3% and 23.6% of our total operating revenues, respectively. For the nine months ended September 30, 2015 and 2014, operating revenues from properties outside the United States contributed $291.3 million and $288.6 million, respectively, which represented 23.1% and 24.0% of our total operating revenues, respectively. Net investment in properties outside the United States was $2.6 billion and $2.7 billion as of September 30, 2015 and December 31, 2014, respectively. Net assets in foreign operations were approximately $0.6 billion and $0.7 billion as of September 30, 2015 and December 31, 2014, respectively.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures (Digital Realty Trust, Inc.)

The company maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in its reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the U.S. Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to its management, including its chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, the company’s management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and its management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Also, the company has investments in certain unconsolidated entities, which are accounted for using the equity method of accounting. As the company does not control or manage these entities, its disclosure controls and procedures with respect to such entities may be substantially more limited than those it maintains with respect to its consolidated subsidiaries.

78

As required by Rule 13a-15(b) or Rule 15d-15(b) of the Securities Exchange Act of 1934, as amended, management of the company carried out an evaluation, under the supervision and with participation of its chief executive officer and chief financial officer, of the effectiveness of the design and operation of its disclosure controls and procedures that were in effect as of the end of the quarter covered by this report. Based on the foregoing, the company’s chief executive officer and chief financial officer concluded that its disclosure controls and procedures were effective at the reasonable assurance level.

There have been no changes in the company’s internal control over financial reporting during its most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

On May 14, 2013, the Committee of Sponsoring Organizations of the Treadway Commission (COSO) issued an updated version of its Internal Control — Integrated Framework (2013 Framework). Originally issued in 1992 (1992 Framework), the framework helps organizations design, implement and evaluate the effectiveness of internal control concepts and simplify their use and application. The 1992 Framework remains available during the transition period, which extends to December 15, 2014, after which time COSO will consider it as superseded by the 2013 Framework. As of September 30, 2015, the company continues to utilize the 1992 Framework during the transition to the 2013 Framework by the end of 2015. We expect that management’s assessment of the overall effectiveness of our internal controls over financial reporting for the year ending December 31, 2015 will be based on the 2013 Framework and that the change will not be significant to our overall control structure over financial reporting.

Evaluation of Disclosure Controls and Procedures (Digital Realty Trust, L.P.)

The operating partnership maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in its reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the U.S. Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to its management, including the chief executive officer and chief financial officer of its general partner, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, the operating partnership’s management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and its management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Also, the operating partnership has investments in certain unconsolidated entities, which are accounted for using the equity method of accounting. As the operating partnership does not control or manage these entities, its disclosure controls and procedures with respect to such entities may be substantially more limited than those it maintains with respect to its consolidated subsidiaries.

As required by Rule 13a-15(b) or Rule 15d-15(b) of the Securities Exchange Act of 1934, as amended, management of the operating partnership carried out an evaluation, under the supervision and with participation of the chief executive officer and chief financial officer of its general partner, of the effectiveness of the design and operation of its disclosure controls and procedures that were in effect as of the end of the quarter covered by this report. Based on the foregoing, the chief executive officer and chief financial officer of the operating partnership’s general partner concluded that its disclosure controls and procedures were effective at the reasonable assurance level.

There have been no changes in the operating partnership’s internal control over financial reporting during its most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

On May 14, 2013, the Committee of Sponsoring Organizations of the Treadway Commission (COSO) issued an updated version of its Internal Control — Integrated Framework (2013 Framework). Originally issued in 1992 (1992 Framework), the framework helps organizations design, implement and evaluate the effectiveness of internal control concepts and simplify their use and application. The 1992 Framework remains available during the transition period, which extends to December 15, 2014, after which time COSO will consider it as superseded by the 2013 Framework. As of September 30, 2015, the operating partnership continues to utilize the 1992 Framework during the transition to the 2013 Framework by the end of 2015. We expect that management’s assessment of the overall effectiveness of our internal controls over financial reporting for the year ending December 31, 2015 will be based on the 2013 Framework and that the change will not be significant to our overall control structure over financial reporting.

79

PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS.

None.

ITEM 1A. RISK FACTORS.

The risk factors discussed under the heading “Risk Factors” and elsewhere in the company’s and the operating partnership’s Annual Report on Form 10-K for the year ended December 31, 2014 continue to apply to our business and should be supplemented with the following risk factor:

Tax Liabilities and Attributes Inherited in Connection with Acquisitions.

From time to time we may acquire other corporations or entities and, in connection with such acquisitions, we may succeed to the historic tax attributes and liabilities of such entities. For example, if we acquire a C corporation and subsequently dispose of its assets within ten years of the acquisition, we could be required to pay tax on any built-in gain attributable to such assets determined as of the date on which we acquired the assets. In addition, in order to qualify as a REIT, at the end of any taxable year, we must not have any earnings and profits accumulated in a non-REIT year. As a result, if we acquire a C corporation, we must distribute the corporation’s earnings and profits accumulated prior to the acquisition before the end of the taxable year in which we acquire the corporation. We also could be required to pay the acquired entity’s unpaid taxes even though such liabilities arose prior to the time we acquired the entity. Telx was a C corporation at the time of the Telx Acquisition, and the Telx Acquisition raises each of these issues.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS.

Digital Realty Trust, Inc.

None.

Digital Realty Trust, L.P.

During the three months ended September 30, 2015, our operating partnership issued partnership units in private placements in reliance on the exemption from registration provided by Section 4(2) of the Securities Act, in the amounts and for the consideration set forth below:

During the three months ended September 30, 2015, Digital Realty Trust, Inc. issued an aggregate of 15,000 shares of its common stock upon the exercise of stock options. Digital Realty Trust, Inc. contributed the proceeds from the option exercises of approximately $0.3 million to our operating partnership in exchange for an aggregate of 15,000 common units, as required by our operating partnership’s partnership agreement.

During the three months ended September 30, 2015, Digital Realty Trust, Inc. issued an aggregate of 3,938 shares of its common stock in connection with restricted stock awards for no cash consideration. For each share of common stock issued by Digital Realty Trust, Inc. in connection with such an award, our operating partnership issued a restricted common unit to Digital Realty Trust, Inc. During the three months ended September 30, 2015, our operating partnership issued an aggregate of 3,938 common units to Digital Realty Trust, Inc., as required by our operating partnership’s partnership agreement. During the three months ended September 30, 2015, an aggregate of 11,746 shares of its common stock were forfeited to Digital Realty Trust, Inc. in connection with restricted stock awards for a net forfeiture of 7,808 shares of common stock.

For these issuances of common units to Digital Realty Trust, Inc., our operating partnership relied on Digital Realty Trust, Inc.’s status as a publicly traded NYSE-listed company with approximately $9.5 billion in total consolidated assets and as our operating partnership’s majority owner and general partner as the basis for the exemption under Section 4(2) of the Securities Act.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES.

None.

ITEM 4. MINE SAFETY DISCLOSURES.

Not applicable.

ITEM 5. OTHER INFORMATION.

80

None.

81

ITEM 6. EXHIBITS.

Exhibit Number	Description
2.1	Agreement and Plan of Merger by and among Telx Holdings, Inc., Digital Realty Trust, Inc., Digital Delta, Inc. and BSR LLC, dated as of July 13, 2015 (incorporated by reference to Exhibit 2.1 to the Combined Quarterly Report on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on August 6, 2015).
3.1	Articles of Amendment and Restatement of Digital Realty Trust, Inc., as amended (incorporated by reference to Exhibit 4.1 to Digital Realty Trust, Inc.’s Registration Statement on Form S-8 filed on April 28, 2014).
3.2	Articles Supplementary designating Digital Realty Trust, Inc.’s 6.350% Series I Cumulative Redeemable Preferred Stock (incorporated by reference to Exhibit 3.2 to Digital Realty Trust, Inc.’s Registration Statement on Form 8-A filed on August 21, 2015).
3.3	Fifth Amended and Restated Bylaws of Digital Realty Trust, Inc. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on May 2, 2014).
3.4	Certificate of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, L.P.’s General Form for Registration of Securities on Form 10 filed on June 25, 2010 (File No. 000-54023)).
3.5	Fourteenth Amended and Restated Agreement of Limited Partnership of Digital Realty Trust, L.P., as amended (incorporated by reference to Exhibit 3.1 to the Combined Current Report on Form 8-K/A of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on October 19, 2015).
4.1	Indenture, dated as of October 1, 2015, among Digital Delta Holdings, LLC as issuer, Digital Realty Trust, Inc. and Digital Realty Trust, L.P., as guarantors, and Wells Fargo Bank, National Association, as trustee, including the form of the Notes and the guarantees (incorporated by reference to Exhibit 4.1 to the Combined Current Report on Form 8-K of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on October 2, 2015).
4.2	Registration Rights Agreement, dated October 1, 2015, among Digital Delta Holdings, LLC, Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated and Morgan Stanley & Co. LLC, as representatives of the several initial purchasers named therein (incorporated by reference to Exhibit 4.2 to the Combined Current Report on Form 8-K of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on October 2, 2015).
10.1†	Digital Realty Trust, Inc. 2015 Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.6 to the Combined Quarterly Report on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on August 6, 2015).
10.2†	First Amendment to Digital Realty Trust, Inc. 2015 Employee Stock Purchase Plan (incorporated by reference to Exhibit 4.7 to the Registration Statement on Form S-8 of Digital Realty Trust, Inc. filed on October 7, 2015).
10.3†	Second Amendment to Digital Realty Deferred Compensation Plan.
10.4†	Settlement Agreement and General Release, dated as of July 22, 2015, by and among Digital Realty Trust, Inc., Digital Realty Trust, L.P., DLR LLC and Michael F. Foust (incorporated by reference to Exhibit 10.7 to the Combined Quarterly Report on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on August 6, 2015).
12.1	Statement of Computation of Ratios.
31.1	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer for Digital Realty Trust, Inc.
31.2	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer for Digital Realty Trust, Inc.
31.3	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer for Digital Realty Trust, L.P.
31.4	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer for Digital Realty Trust, L.P.
32.1	18 U.S.C. § 1350 Certification of Chief Executive Officer for Digital Realty Trust, Inc.
32.2	18 U.S.C. § 1350 Certification of Chief Financial Officer for Digital Realty Trust, Inc.
32.3	18 U.S.C. § 1350 Certification of Chief Executive Officer for Digital Realty Trust, L.P.
32.4	18 U.S.C. § 1350 Certification of Chief Financial Officer for Digital Realty Trust, L.P.

82

101 The following financial statements from Digital Realty Trust, Inc.’s and Digital Realty Trust, L.P.’s Form 10-Q for the quarter ended September 30, 2015, formatted in XBRL interactive data files: (i) Condensed Consolidated Balance Sheets as of September 30, 2015 and December 31, 2014; (ii) Condensed Consolidated Income Statements for the three and nine months ended September 30, 2015 and 2014; (iii) Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 and 2014; (iv) Condensed Consolidated Statements of Equity/Capital for the nine months ended September 30, 2015; (v) Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 and 2014; and (vi) Notes to Condensed Consolidated Financial Statements.

† Management contract or compensatory plan or arrangement.

83

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	DIGITAL REALTY TRUST, INC.
November 6, 2015	/S/    A. WILLIAM STEIN
	A. William Stein Chief Executive Officer (principal executive officer)
November 6, 2015	/S/    ANDREW P.POWER
	Andrew P. Power Chief Financial Officer (principal financial officer)
November 6, 2015	/S/    EDWARD F. SHAM
	Edward F. Sham Sr. Vice President and Controller (principal accounting officer)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		DIGITAL REALTY TRUST, L.P.
	By: Digital Realty Trust, Inc.        Its general partner
	By:
November 6, 2015		/S/    A. WILLIAM STEIN
		A. William Stein Chief Executive Officer (principal executive officer)
November 6, 2015		/S/    ANDREW P.POWER
		Andrew P. Power Chief Financial Officer (principal financial officer)
November 6, 2015		/s/    EDWARD F. SHAM
		Edward F. Sham Sr. Vice President and Controller (principal accounting officer)

84

Exhibit Index

Exhibit Number	Description
2.1	Agreement and Plan of Merger by and among Telx Holdings, Inc., Digital Realty Trust, Inc., Digital Delta, Inc. and BSR LLC, dated as of July 13, 2015 (incorporated by reference to Exhibit 2.1 to the Combined Quarterly Report on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on August 6, 2015).
3.1	Articles of Amendment and Restatement of Digital Realty Trust, Inc., as amended (incorporated by reference to Exhibit 4.1 to Digital Realty Trust, Inc.’s Registration Statement on Form S-8 filed on April 28, 2014).
3.2	Articles Supplementary designating Digital Realty Trust, Inc.’s 6.350% Series I Cumulative Redeemable Preferred Stock (incorporated by reference to Exhibit 3.2 to Digital Realty Trust, Inc.’s Registration Statement on Form 8-A filed on August 21, 2015).
3.3	Fifth Amended and Restated Bylaws of Digital Realty Trust, Inc. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on May 2, 2014).
3.4	Certificate of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, L.P.’s General Form for Registration of Securities on Form 10 filed on June 25, 2010 (File No. 000-54023)).
3.5	Fourteenth Amended and Restated Agreement of Limited Partnership of Digital Realty Trust, L.P., as amended (incorporated by reference to Exhibit 3.1 to the Combined Current Report on Form 8-K/A of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on October 19, 2015).
4.1	Indenture, dated as of October 1, 2015, among Digital Delta Holdings, LLC as issuer, Digital Realty Trust, Inc. and Digital Realty Trust, L.P., as guarantors, and Wells Fargo Bank, National Association, as trustee, including the form of the Notes and the guarantees (incorporated by reference to Exhibit 4.1 to the Combined Current Report on Form 8-K of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on October 2, 2015).
4.2	Registration Rights Agreement, dated October 1, 2015, among Digital Delta Holdings, LLC, Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated and Morgan Stanley & Co. LLC, as representatives of the several initial purchasers named therein (incorporated by reference to Exhibit 4.2 to the Combined Current Report on Form 8-K of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on October 2, 2015).
10.1†	Digital Realty Trust, Inc. 2015 Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.6 to the Combined Quarterly Report on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on August 6, 2015).
10.2†	First Amendment to Digital Realty Trust, Inc. 2015 Employee Stock Purchase Plan (incorporated by reference to Exhibit 4.7 to the Registration Statement on Form S-8 of Digital Realty Trust, Inc. filed on October 7, 2015).
10.3†	Second Amendment to Digital Realty Deferred Compensation Plan.
10.4†	Settlement Agreement and General Release, dated as of July 22, 2015, by and among Digital Realty Trust, Inc., Digital Realty Trust, L.P., DLR LLC and Michael F. Foust (incorporated by reference to Exhibit 10.7 to the Combined Quarterly Report on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. filed on August 6, 2015).
12.1	Statement of Computation of Ratios.
31.1	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer for Digital Realty Trust, Inc.
31.2	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer for Digital Realty Trust, Inc.
31.3	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer for Digital Realty Trust, L.P.
31.4	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer for Digital Realty Trust, L.P.
32.1	18 U.S.C. § 1350 Certification of Chief Executive Officer for Digital Realty Trust, Inc.
32.2	18 U.S.C. § 1350 Certification of Chief Financial Officer for Digital Realty Trust, Inc.
32.3	18 U.S.C. § 1350 Certification of Chief Executive Officer for Digital Realty Trust, L.P.
32.4	18 U.S.C. § 1350 Certification of Chief Financial Officer for Digital Realty Trust, L.P.

85

101 The following financial statements from Digital Realty Trust, Inc.’s and Digital Realty Trust, L.P.’s Form 10-Q for the quarter ended September 30, 2015, formatted in XBRL interactive data files: (i) Condensed Consolidated Balance Sheets as of September 30, 2015 and December 31, 2014; (ii) Condensed Consolidated Income Statements for the three and nine months ended September 30, 2015 and 2014; (iii) Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 and 2014; (iv) Condensed Consolidated Statements of Equity/Capital for the nine months ended September 30, 2015; (v) Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 and 2014; and (vi) Notes to Condensed Consolidated Financial Statements.

† Management contract or compensatory plan or arrangement.

86

EX-10.3

Exhibit 10.3

SECOND AMENDMENT TO

DIGITAL REALTY DEFERRED COMPENSATION PLAN

THIS SECOND AMENDMENT TO DIGITAL REALTY DEFERRED COMPENSATION PLAN (this “Second Amendment”) is made and adopted by the Board of Directors (the “Board”) of Digital Realty Trust, Inc., a Maryland corporation (the “Company”), effective as of the Effective Date (as defined below). Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to them in the Plan (as defined below).

RECITALS

WHEREAS, the Company maintains the Digital Realty Deferred Compensation Plan (as amended, the “Plan”);

WHEREAS, pursuant to Section 8.9 of the Plan, the Plan may be amended at any time by the Company’s Board of Directors (the “Board”);

WHEREAS, pursuant to that certain Agreement and Plan of Merger, dated July 13, 2015 (the “Merger Agreement”), by and among the Company, Telx Holdings, Inc., a Delaware corporation (“Telx”), Digital Delta, Inc., a Delaware corporation (“Merger Sub”), and BSR LLC, as the Seller’s representative, Merger Sub shall be merged with and into Telx (the “Merger”), with Telx continuing as the surviving corporation and a wholly-owned subsidiary of the Company; and

WHEREAS, in connection with the Merger, effective as of date of the consummation of the Merger (the “Effective Date”), the Company desires to amend the Plan as set forth herein.

NOW, THEREFORE, BE IT RESOLVED, that the Plan is hereby amended as set forth herein, effective as of the Effective Date.

AMENDMENT

1. Section 1.2(s) of the Plan is hereby amended and restated in its entirety as follows:

“(s)“Employee” means each employee (as defined in accordance with Section 3401(c) of the Code) of the Company, the Partnership or any Subsidiary, excluding any employee of Telx Holdings, Inc. or any of its subsidiaries, who (i) is a Level 9 (or higher) employee and (ii) whose principal place of employment with the Company, the Partnership or such Subsidiary is in the United States.”

2. This Second Amendment shall be and is hereby incorporated in and forms a part of the Plan.

3. Except as expressly provided herein, all terms and provisions of the Plan shall remain in full force and effect.

[Signature Page Follows]

I hereby certify that the foregoing Second Amendment was duly adopted by the Board of Directors of Digital Realty Trust, Inc. on August 11, 2015.

Executed on this 11th day of August, 2015.

/s/ Joshua A. Mills

Joshua A. Mills

Senior Vice President, General Counsel and Secretary

EX-12.1

Exhibit 12.1

Digital Realty Trust, Inc. and Subsidiaries

Statement of Computation of Ratios

(in thousands, except ratios)

	Nine Months Ended September 30,						Year Ended December 31,
	2015			2014			2014			2013			2012		2011		2010
Income from continuing operations before noncontrolling interests	$	318,164		$	238,210		$	203,415		$	320,449		$	216,047	$	162,126	$	105,412
Interest expense	139,718			144,689			191,085			189,399			157,108		149,350		137,384
Interest within rental expense (1)	4,610			3,973			5,393			7,687			3,410		2,847		2,604
Noncontrolling interests in consolidated joint ventures	(342		)	(352		)	(465		)	(595		)	444		324		288
Earnings available to cover fixed charges	$	462,150		$	386,520		$	399,428		$	516,940		$	377,009	$	314,647	$	245,688
Fixed charges:
Interest expense	$	139,718		$	144,689		$	191,085		$	189,399		$	157,108	$	149,350	$	137,384
Interest within rental expense (1)	4,610			3,973			5,393			7,687			3,410		2,847		2,604
Capitalized interest	9,896			15,606			20,373			26,277			21,456		17,905		10,241
Total fixed charges	154,224			164,268			216,851			223,363			181,974		170,102		150,229
Preferred stock dividends	55,367			49,010			67,465			42,905			38,672		25,397		37,004
Fixed charges and preferred stock dividends	$	209,591		$	213,278		$	284,316		$	266,268		$	220,646	$	195,499	$	187,233
Ratio of earnings to fixed charges	3.00			2.35			1.84			2.31			2.07		1.85		1.64
Ratio of earnings to fixed charges and preferred stock dividends	2.21			1.81			1.40			1.94			1.71		1.61		1.31

(1) Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).

Digital Realty Trust, L.P. and Subsidiaries

Statement of Computation of Ratios

(in thousands, except ratios)

	Nine Months Ended September 30,						Year Ended December 31,
	2015			2014			2014			2013			2012		2011		2010
Income from continuing operations before noncontrolling interests	$	317,011		$	238,210		$	203,415		$	320,449		$	216,047	$	162,126	$	105,412
Interest expense	140,871			144,689			191,085			189,399			157,108		149,350		137,384
Interest within rental expense (1)	4,610			3,973			5,393			7,687			3,410		2,847		2,604
Noncontrolling interests in consolidated joint ventures	(342		)	(352		)	(465		)	(595		)	444		324		288
Earnings available to cover fixed charges	$	462,150		$	386,520		$	399,428		$	516,940		$	377,009	$	314,647	$	245,688
Fixed charges:
Interest expense	$	140,871		$	144,689		$	191,085		$	189,399		$	157,108	$	149,350	$	137,384
Interest within rental expense (1)	4,610			3,973			5,393			7,687			3,410		2,847		2,604
Capitalized interest	9,896			15,606			20,373			26,277			21,456		17,905		10,241
Total fixed charges	155,377			164,268			216,851			223,363			181,974		170,102		150,229
Preferred unit distributions	55,367			49,010			67,465			42,905			38,672		25,397		37,004
Fixed charges and preferred unit distributions	$	210,744		$	213,278		$	284,316		$	266,268		$	220,646	$	195,499	$	187,233
Ratio of earnings to fixed charges	2.97			2.35			1.84			2.31			2.07		1.85		1.64
Ratio of earnings to fixed charges and preferred unit distributions	2.19			1.81			1.40			1.94			1.71		1.61		1.31

(1) Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, A. William Stein, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	November 6, 2015
By:	/s/    A. WILLIAM STEIN
	A. William Stein
	Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Andrew P. Power, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	November 6, 2015
By:	/s/    ANDREW P. POWER
	Andrew P. Power
	Chief Financial Officer
	(Principal Financial Officer)

EX-31.3

Exhibit 31.3

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, A. William Stein, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	November 6, 2015
By:	/s/    A. WILLIAM STEIN
	A. William Stein
	Chief Executive Officer
	(Principal Executive Officer)
	Digital Realty Trust, Inc., sole general partner of
	Digital Realty Trust, L.P.

EX-31.4

Exhibit 31.4

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Andrew P. Power, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	November 6, 2015
By:	/s/    ANDREW P. POWER
	Andrew P. Power
	Chief Financial Officer
	(Principal Financial Officer)
	Digital Realty Trust, Inc., sole general partner of
	Digital Realty Trust, L.P.

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated.

Dated:	November 6, 2015
	/s/    A. WILLIAM STEIN
	A. William Stein
	Chief Executive Officer
	(Principal Executive Officer)

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Company filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated.

Dated:	November 6, 2015
	/s/    ANDREW P. POWER
	Andrew P. Power
	Chief Financial Officer
	(Principal Financial Officer)

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Company filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.3

Exhibit 32.3

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, Inc., in its capacity as the sole general partner of Digital Realty Trust, L.P. (the “Operating Partnership”), hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarterly period ended September 30, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership at the dates and for the periods indicated.

Dated:	November 6, 2015
	/s/    A. WILLIAM STEIN
	A. William Stein
	Chief Executive Officer
	(Principal Executive Officer)
	Digital Realty Trust, Inc., sole general partner of
	Digital Realty Trust, L.P.

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Operating Partnership for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Operating Partnership filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.4

Exhibit 32.4

Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, Inc., in its capacity as the sole general partner of Digital Realty Trust, L.P. (the “Operating Partnership”), hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarterly period ended September 30, 2015 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership at the dates and for the periods indicated.

Dated:	November 6, 2015
	/s/    ANDREW P. POWER
	Andrew P. Power
	Chief Financial Officer
	(Principal Financial Officer)
	Digital Realty Trust, Inc., sole general partner of
	Digital Realty Trust, L.P.

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Operating Partnership for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Operating Partnership filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Organization And Description Of Business (Narrative) (Details)	Sep. 30, 2015 property
Organization and Description of Business [Line Items]
Number of properties owned	132
Common Interest
Organization and Description of Business [Line Items]
Ownership percentage in the Operating Partnership	98.00%
Preferred Interest
Organization and Description of Business [Line Items]
Ownership percentage in the Operating Partnership	100.00%
Joint Ventures
Organization and Description of Business [Line Items]
Number of properties held as investments in unconsolidated joint ventures	14
North America
Organization and Description of Business [Line Items]
Number of properties owned	103
Europe
Organization and Description of Business [Line Items]
Number of properties owned	23
Australia
Organization and Description of Business [Line Items]
Number of properties owned	3
Asia
Organization and Description of Business [Line Items]
Number of properties owned	3
Held-for-sale
Organization and Description of Business [Line Items]
Number of properties	3
Held-for-sale | Assets Identified for Disposal Subsequent to First Quarter 2015
Organization and Description of Business [Line Items]
Number of properties	8

XML

Debt of the Operating Partnership (Unsecured Term Loan) (Narrative) (Details) - Unsecured term loan	9 Months Ended
	Sep. 30, 2015 USD ($) extension	Dec. 31, 2014 USD ($)	Aug. 15, 2013 USD ($)	Aug. 14, 2013 USD ($)
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 938,276,000	$ 976,600,000
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1,000,000,000.0	$ 750,000,000.0
Maturity Date	Apr. 16, 2017
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Balance as of September 30, 2015	$ 938,276,000	$ 976,600,000
Capitalized financing costs	$ 8,400,000
Accordian Feature | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1,100,000,000.0

XML

Debt of the Company (Details) - Senior Notes:	9 Months Ended
	Sep. 30, 2015	Jun. 23, 2015
5.875% notes due 2020
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.875%
Maturity date	2020
5.25% notes due 2021
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.25%
Maturity date	2021
3.625% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	3.625%
Maturity date	2022
3.95% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	3.95%	3.95%
4.75% notes due 2023
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	4.75%
Maturity date	2023
4.25% notes due 2025
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	4.25%
Maturity date	2025
3.400% Notes Due 2020
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	3.40%
4.750% Notes Due 2025
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	4.75%

XML

Capital And Accumulated Other Comprehensive Income (Schedule Of Dividends/Distributions) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares
Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 15,093
Preferred stock dividend per share amount | $ / shares	$ 1.750
Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 9,069
Preferred stock dividend per share amount | $ / shares	$ 1.656
Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 11,016
Preferred stock dividend per share amount | $ / shares	$ 1.469
Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 20,190
Preferred stock dividend per share amount | $ / shares	$ 1.844
Common Units
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	$ 353,796
February 25, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	Feb. 25, 2015
Dividend/Distribution payment date	Mar. 31, 2015
February 25, 2015 | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Date dividend/distribution declared	Feb. 25, 2015
Dividend/Distribution payment date	Mar. 31, 2015
February 25, 2015 | Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 5,031
February 25, 2015 | Series E Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	5,031
February 25, 2015 | Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023
February 25, 2015 | Series F Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023
February 25, 2015 | Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672
February 25, 2015 | Series G Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672
February 25, 2015 | Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730
February 25, 2015 | Series H Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730
February 25, 2015 | Common Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	$ 117,896
May 12, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	May 12, 2015
Dividend/Distribution payment date	Jun. 30, 2015
May 12, 2015 | Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 5,031
May 12, 2015 | Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023
May 12, 2015 | Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672
May 12, 2015 | Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730
May 12, 2015 | Common Units
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	$ 117,938
August 11, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	Aug. 11, 2015
Dividend/Distribution payment date	Sep. 30, 2015
August 11, 2015 | Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 5,031
August 11, 2015 | Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023
August 11, 2015 | Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672
August 11, 2015 | Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730
August 11, 2015 | Common Units
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	$ 117,962
Annual rate | Series E Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Preferred stock dividend per share amount | $ / shares	$ 1.750
Annual rate | Series F Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Preferred stock dividend per share amount | $ / shares	1.656
Annual rate | Series G Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Preferred stock dividend per share amount | $ / shares	1.469
Annual rate | Series H Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Preferred stock dividend per share amount | $ / shares	1.844
Annual rate | Common Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Common stock dividend per share amount | $ / shares	$ 3.400

XML

Debt of the Operating Partnership (3.950% Notes due 2022) (Narrative) (Details) - Senior Notes: - 3.950% Notes Due 2022	Jun. 23, 2015 USD ($)	Sep. 30, 2015
Debt Instrument [Line Items]
Face amount	$ 500,000,000.0
Stated interest rate	3.95%	3.95%
Principal received relative to par value	99.236%
Unamortized discount	$ 3,800,000
Issuance cost	4,400,000
Proceeds from debt, net	$ 491,800,000
Maximum leverage ratio	60.00%
Maximum secured leverage ratio	40.00%
Minimum interest coverage ratio	1.50
Minimum unencumbered assets relative to aggregate principal of unsecured debt	150.00%

XML

Incentive Plan (Summary Of Stock Options Outstanding And Exercisable) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding (shares)	53,972	80,933
Weighted-average remaining contractual life (years)	566 days
Weighted average exercise price, Outstanding ($ per share)	$ 41.07
Aggregate intrinsic value	$ 1,308,896
$33.18
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit	$ 33.18
Exercise price, upper limit	$ 33.18
Number outstanding (shares)	4,175
Weighted-average remaining contractual life (years)	397 days
Weighted average exercise price, Outstanding ($ per share)	$ 33.18
Aggregate intrinsic value	$ 134,185
$41.73
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit	$ 41.73
Exercise price, upper limit	$ 41.73
Number outstanding (shares)	49,797
Weighted-average remaining contractual life (years)	580 days
Weighted average exercise price, Outstanding ($ per share)	$ 41.73
Aggregate intrinsic value	$ 1,174,711

XML

Acquired Intangible Assets And Liabilities (Schedule Of Estimated Annual Amortization Of Below Market Leases) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Below-market lease, net	$ 88,632	$ 104,235
Below-Market Leases, Net of Above-Market Leases
Finite-Lived Intangible Assets [Line Items]
Below-market leases, Remainder of 2015	1,994
Below-market leases, 2016	7,554
Below-market leases, 2017	6,143
Below-market leases, 2018	4,534
Below-market leases, 2019	4,610
Below-market leases, Thereafter	33,180
Below-market lease, net	$ 58,015

XML

Income per Unit (Tables)

9 Months Ended

Sep. 30, 2015

Summary Of Basic And Diluted Earnings Per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income available to common stockholders	$	38,522	$	109,314	$	257,305	$	185,010
Weighted average shares outstanding—basic	135,832,503		135,492,618		135,782,831		132,635,894
Potentially dilutive common shares:
Stock options	19,983		52,629		20,629		46,649
Unvested incentive units	86,190		129,024		65,752		61,122
Series I Cumulative Redeemable Preferred Stock	1,703,182		—		567,727		—
Market performance-based awards	618,078		272,262		483,538		109,301
Weighted average shares outstanding—diluted	138,259,936		135,946,533		136,920,477		132,852,966
Income per share:
Basic	$	0.28	$	0.81	$	1.89	$	1.39
Diluted	$	0.28	$	0.80	$	1.88	$	1.39

Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,635,444	2,815,512	2,698,215	2,745,730
Potentially dilutive 2029 Debentures	—	—	—	2,617,790
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	4,567,661	4,673,322	4,440,429	5,136,112
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	2,896,800	2,963,810	2,816,110	3,257,310
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	3,960,900	4,052,525	3,850,569	4,453,839
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	5,804,286	5,938,553	5,642,608	4,111,306
Shares subject to Forward Equity Offering	10,500,000	—	10,500,000	—
	30,365,091	20,443,722	29,947,931	22,322,087

Digital Realty Trust, L.P.

Summary Of Basic And Diluted Earnings Per Share

The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income available to common unitholders	$	38,116	$	111,586	$	261,302	$	188,848
Weighted average units outstanding—basic	138,467,947		138,308,130		138,481,046		135,381,624
Potentially dilutive common units:
Stock options	19,983		52,629		20,629		46,649
Unvested incentive units	86,190		129,024		65,752		61,122
Market performance-based awards	618,078		272,262		483,538		109,301
Weighted average units outstanding—diluted	139,192,198		138,762,045		139,050,965		135,598,696
Income per unit:
Basic	$	0.28	$	0.81	$	1.89	$	1.39
Diluted	$	0.27	$	0.80	$	1.88	$	1.39

Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Potentially dilutive 2029 Debentures	—	1,121,910	—	3,948,379
Potentially dilutive Series E Cumulative Redeemable Preferred Units	4,567,661	5,060,744	4,440,429	5,367,507
Potentially dilutive Series F Cumulative Redeemable Preferred Units	2,896,800	3,209,512	2,816,110	3,404,060
Potentially dilutive Series G Cumulative Redeemable Preferred Units	3,960,900	4,388,483	3,850,569	4,654,496
Potentially dilutive Series H Cumulative Redeemable Preferred Units	5,804,286	6,437,332	5,642,608	3,449,841
Units subject to Forward Equity Offering	10,500,000	—	10,500,000	—
	27,729,647	20,217,981	27,249,716	20,824,283

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Incentive Plan (Restricted Stock) (Narrative) (Details) - Restricted Stock - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock expense	$ 0.7	$ 0.4	$ 1.8	$ 1.9
Capitalized expense related to construction and leasing activities	0.6	$ 0.4	2.1	$ 2.0
Unearned compensation	$ 11.9		$ 11.9		$ 10.4
Unearned compensation, period of recognition			966 days
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years

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Incentive Plan (Long-Term Incentive Units) (Narrative) (Details) - Long-Term Incentive Units - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years
Share/unit compensation expense	$ 1.5	$ 1.5	$ 4.6	$ 5.2
Capitalized expense related to construction and leasing activities	0.0	$ 0.3	1.1	$ 1.1
Unearned compensation	$ 8.7		$ 8.7		$ 9.3
Unearned compensation, period of recognition			851 days

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Debt of the Operating Partnership (Due to Parent) (Narrative) (Details) - USD ($) $ in Millions				9 Months Ended
	Oct. 13, 2015	Oct. 08, 2015	Aug. 24, 2015	Sep. 30, 2015
Intercompany Loan
Debt Instrument [Line Items]
Stated interest rate				4.50%
Interest accrued				$ 1.2
Digital Realty Trust, L.P. | Subsequent Event | Intercompany Loan
Debt Instrument [Line Items]
Extinguishment of debt		$ 244.1
Series I Preferred Stock
Debt Instrument [Line Items]
Issued (shares)			10,000,000
Preferred Stock, dividend rate			6.35%	6.35%
Gross proceeds from the issuance of preferred stock			$ 242.7
Series I Preferred Stock | Digital Realty Trust, L.P. | Subsequent Event
Debt Instrument [Line Items]
Issued (shares)	10,000,000
Preferred Stock, dividend rate	6.35%

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Incentive Plan (Market Performance Based Awards) (Details)	9 Months Ended
	Sep. 30, 2015
2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage	0.00%
RMS Relative Market Performance	0.00%
2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance	(3.00%)
Threshold Level | 2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage	25.00%
RMS Relative Market Performance	0.00%
Threshold Level | 2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance	(3.00%)
Target Level | 2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage	50.00%
RMS Relative Market Performance	3.25%
Target Level | 2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance	1.00%
High Level | 2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage	100.00%
RMS Relative Market Performance	6.50%
High Level | 2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance	5.00%

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Derivative Instruments (Details) $ in Thousands		1 Months Ended	3 Months Ended			9 Months Ended
	Jan. 13, 2015 USD ($)	Jan. 31, 2014	Sep. 30, 2015 USD ($) $ / SGD	Mar. 31, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) $ / SGD	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) $ / SGD
Derivative [Line Items]
Notional Amount			$ 469,142			$ 469,142		$ 703,870
Fair Value at Significant Other Observable Inputs (Level 2)			(67)			(67)		$ (2,409)
Interest Expense			$ 48,138		$ 48,169	139,718	$ 144,689
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash flow hedge adjustments
Derivative [Line Items]
Interest Expense						$ 1,900
Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Term of contract		5 years
Loss on hedge				$ 1,600
Cash settlement	$ 5,700
SGD
Derivative [Line Items]
Exchange rate | $ / SGD			0.70			0.70		0.75
Currently-paying contracts
Derivative [Line Items]
Notional Amount			$ 469,142			$ 469,142		$ 553,870
Fair Value at Significant Other Observable Inputs (Level 2)			(67)			(67)		428
Currently-paying contracts | Swap 1
Derivative [Line Items]
Notional Amount			$ 335,905			$ 335,905		410,905
Type of Derivative						Swap
Strike Rate			0.717%			0.717%
Fair Value at Significant Other Observable Inputs (Level 2)			$ (1,502)			$ (1,502)		(241)
Currently-paying contracts | Swap 2
Derivative [Line Items]
Notional Amount			$ 133,237			$ 133,237		142,965
Type of Derivative						Swap
Strike Rate			0.925%			0.925%
Effective Date						Jul. 17, 2012
Expiration Date						Apr. 18, 2017
Fair Value at Significant Other Observable Inputs (Level 2)			$ 1,435			$ 1,435		669
Forward-starting contracts
Derivative [Line Items]
Notional Amount			$ 0			$ 0		150,000
Type of Derivative						Forward-starting Swap
Strike Rate			2.091%			2.091%
Effective Date						Jul. 15, 2014
Expiration Date						Jul. 15, 2019
Fair Value at Significant Other Observable Inputs (Level 2)			$ 0			$ 0		$ (2,837)

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Incentive Plan (Summary Of Incentive Award Plan's Stock Option) (Details)	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning of period, Shares	80,933
Exercised, Shares	(26,961)
Options outstanding, end of period, Shares	53,972
Exercisable, end of period, Shares	53,972
Options outstanding, beginning of period, Weighted average exercise price ($ per share) | $ / shares	$ 37.25
Exercised, Weighted average exercise price ($ per share) | $ / shares	29.61
Options outstanding, end of period, Weighted average exercise price ($ per share) | $ / shares	41.07
Exercisable, end of period, Weighted average exercise price ($ per share) | $ / shares	$ 41.07

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Capital And Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income (Loss)) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	$ (45,046)
Net current period change	(44,978)
Reclassification to interest expense from interest rate swaps	2,036
Balance as of September 30, 2015	(87,988)
Digital Realty Trust, L.P.
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(48,433)
Net current period change	(45,854)
Reclassification to interest expense from interest rate swaps	2,077
Balance as of September 30, 2015	(92,210)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(39,567)
Net current period change	(40,688)
Reclassification to interest expense from interest rate swaps	0
Balance as of September 30, 2015	(80,255)
Foreign currency translation adjustments | Digital Realty Trust, L.P.
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(42,138)
Net current period change	(41,480)
Balance as of September 30, 2015	(83,618)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(5,479)
Net current period change	(4,290)
Reclassification to interest expense from interest rate swaps	2,036
Balance as of September 30, 2015	(7,733)
Cash flow hedge adjustments | Digital Realty Trust, L.P.
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(6,295)
Net current period change	(4,374)
Reclassification to interest expense from interest rate swaps	2,077
Balance as of September 30, 2015	$ (8,592)

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

(a) Contingent liabilities

As part of the acquisition of 29A International Business Park, an asset acquisition in 2010, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined in the agreements for the acquisition. As of December 31, 2014, certain leases executed subsequent to the acquisition caused an amount to become probable of payment and therefore approximately $12.4 million had been accrued in accounts payable and accrued liabilities and capitalized to buildings and improvements in the condensed consolidated balance sheet as of December 31, 2014 and an earnout payment was made during the three months ended June 30, 2015 in the amount of $17.5 million SGD (or approximately $13.0 million based on the exchange rate on the date of payment). As of September 30, 2015, $18.9 million had been accrued and capitalized for additional earnout payments. The second and third tranches of the earnout payments are forecasted to be made in 2016 and 2020, respectively. The maximum amount that could be earned by the seller is $50.0 million SGD (or approximately $35.2 million based on the exchange rate as of September 30, 2015). The earnout contingency expires in November 2020.

One of the tenants at our Convergence Business Park property has an option to expand as part of their lease agreement, which expires in April 2017. As part of this option, development activities were not permitted on specifically identified expansion space within the property until April 2014. From April 2014 through April 2017, the tenant has the right of first refusal on any third party’s bona fide offer to buy the adjacent land. If the tenant exercises their option, we may either construct and lease to the tenant an additional shell building on the expansion space at a stipulated rate of return on cost or sell the existing building and the expansion space to the tenant for a price of approximately $24.0 million and $225,000 per square acre, respectively, plus additional adjustments as provided in the lease.

As part of the acquisition of the Sentrum Portfolio in July 2012, the seller could earn additional consideration based on future net returns on vacant space to be developed, but not currently leased, as defined in the purchase agreement for the acquisition. The initial estimate of fair value of contingent consideration was approximately £56.5 million (or approximately $87.6 million based on the exchange rate as of July 11, 2012, the acquisition date). We have adjusted the contingent consideration to fair value at each reporting date with changes in fair value recognized in operating income. During the nine months ended September 30, 2015, we reduced the fair value by approximately £30.3 million. The adjustment was the result of an evaluation by management that no additional leases would be executed for vacant space by July 11, 2015, the contingency expiration date. The final payment on the earnout was made in August 2015. We made earnout payments of approximately £6.2 million (or approximately $10.3 million based on the exchange rates as of the date of each payment) during the nine months ended September 30, 2014. We made earnout payments of approximately £0.7 million (or approximately $1.1 million based on the exchange rates as of the date of each payment) during the nine months ended September 30, 2015. The change in fair value of contingent consideration for Sentrum was recorded as an increase to operating expense of approximately $0 and $1.5 million for the three months ended September 30, 2015 and 2014, respectively. The change in fair value of contingent consideration for Sentrum was recorded as a reduction to operating expense of approximately $43.0 million and $4.1 million for the nine months ended September 30, 2015 and 2014, respectively.

(b) Construction Commitments

Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements. From time to time in the normal course of our business, we enter into various construction contracts with third parties that may obligate us to make payments. At September 30, 2015, we had open commitments related to construction contracts of approximately $135.6 million.

(c) Legal Proceedings

Although the Company is involved in legal proceedings arising in the ordinary course of business, as of September 30, 2015, the Company is not currently a party to any legal proceedings nor, to its knowledge, is any legal proceeding threatened against it that it believes would have a material adverse effect on its financial position, results of operations or liquidity.

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Debt of the Operating Partnership (Mortgage Loans) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Mortgage loans, including premiums	$ 304,987	$ 378,818
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Mortgage loans, including premiums	304,987	378,818
Unamortized net premiums	475
Total indebtedness	4,748,579	4,673,127
Digital Realty Trust, L.P. | Mortgage Loans
Debt Instrument [Line Items]
Unamortized net premiums	475	582
Total indebtedness	$ 304,987	378,818
Digital Realty Trust, L.P. | Mortgage Loans | 200 Paul Avenue
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.74%
Maturity Date	Oct. 08, 2015
Mortgage loans, including premiums	$ 0	68,665
Digital Realty Trust, L.P. | Mortgage Loans | 2045 & 2055 Lafayette Street
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.93%
Maturity Date	Feb. 06, 2017
Mortgage loans, including premiums	$ 61,728	62,563
Digital Realty Trust, L.P. | Mortgage Loans | 34551 Ardenwood Boulevard 1-4
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.95%
Maturity Date	Nov. 11, 2016
Mortgage loans, including premiums	$ 50,700	51,339
Digital Realty Trust, L.P. | Mortgage Loans | 1100 Space Park Drive
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.89%
Maturity Date	Dec. 11, 2016
Mortgage loans, including premiums	$ 50,648	51,295
Digital Realty Trust, L.P. | Mortgage Loans | 600 West Seventh Street
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.80%
Maturity Date	Mar. 15, 2016
Mortgage loans, including premiums	$ 46,466	47,825
Digital Realty Trust, L.P. | Mortgage Loans | 150 South First Street
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	6.30%
Maturity Date	Feb. 06, 2017
Mortgage loans, including premiums	$ 48,699	49,316
Digital Realty Trust, L.P. | Mortgage Loans | 2334 Lundy Place
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.96%
Maturity Date	Nov. 11, 2016
Mortgage loans, including premiums	$ 36,875	37,340
Digital Realty Trust, L.P. | Mortgage Loans | 8025 North Interstate 35
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	4.09%
Maturity Date	Mar. 06, 2016
Mortgage loans, including premiums	$ 5,857	6,057
Digital Realty Trust, L.P. | Mortgage Loans | 731 East Trade Street
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	8.22%
Maturity Date	Jul. 01, 2020
Mortgage loans, including premiums	$ 3,539	$ 3,836

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Investment In Unconsolidated Joint Ventures (Narrative) (Details) $ in Thousands			3 Months Ended	9 Months Ended
	Sep. 09, 2014 USD ($)	Mar. 05, 2014 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) extension property joint_venture	Dec. 31, 2014 USD ($)
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated joint ventures				$ 103,703	$ 94,729
2001 Sixth Avenue
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures				50.00%
Number of joint ventures | joint_venture				3
33 Chun Choi Street (Hong Kong)
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures				20.00%
Prudential
Schedule of Equity Method Investments [Line Items]
Number of joint ventures | joint_venture				2
Number of properties | property				10
Realized gain		$ 164,800
636 Pierce Street
Schedule of Equity Method Investments [Line Items]
Gross value		40,400
Property subject to debt		26,100
Proceeds received from contribution of property		$ 11,400
Share of net assets less book value percentage		80.00%
Investment in unconsolidated joint ventures		$ 14,300
Line of credit		23,000
Net proceeds from joint venture		17,500
Realized gain		$ 1,900
43915 Devin Shafron Drive
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	20.00%
Number of properties | property				1
Gross value	$ 185,500
Share of net assets less book value percentage	80.00%		80.00%
Transaction costs	$ 2,100
43915 Devin Shafron Drive | Secured Debt
Schedule of Equity Method Investments [Line Items]
Proceeds received from contribution of property	167,500
Realized gain			$ 93,500
Senior face amount	$ 102,000
Debt instrument, term	5 years
Investment, loan to value ratio	55.00%
Number of extension options | extension				2
Debt instrument, extension term				1 year
Interest rate basis spread	2.25%
43915 Devin Shafron Drive | Secured Debt | Interest Rate Swap
Schedule of Equity Method Investments [Line Items]
Senior face amount	$ 51,000

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Incentive Plan (Performance Based Awards) (Narrative) (Details) simulation in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) simulation shares	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period			3 years
Award vesting percentage			0.00%
Award vesting period			3 years
Number of trials | simulation			100
Expected volatility rate			33.00%
Risk-free interest rate			0.67%
Fair value of awards			$ 34.3
Requisite service period of share-based award			4 years
Unearned compensation	$ 18.9		$ 18.9		$ 9.5
Recognized compensation expense	2.1	$ 0.8	5.4	$ 2.2
Capitalized expense related to construction and leasing activities	$ 2.5	$ 0.4	$ 3.6	$ 1.0
2014 Performance Grant | Class D Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards to executive officers and other employees (shares/units) | shares			1,148,991
2014 Performance Grant | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards to executive officers and other employees (shares/units) | shares			368,878
2014 Performance Grant | Share-based Compensation Award, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage			50.00%
2014 Performance Grant | Share-based Compensation Award, Tranche Fifth
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage			50.00%
2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate			24.00%
Risk-free interest rate			1.00%

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Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule Of Outstanding Derivative Instruments

As of September 30, 2015 and December 31, 2014, we had the following outstanding interest rate derivatives that were designated as effective cash flow hedges of interest rate risk (in thousands):

Notional Amount										Fair Value at Significant Other Observable Inputs (Level 2)
As of September 30, 2015			As of December 31, 2014			Type of Derivative	Strike Rate	Effective Date	Expiration Date	As of September 30, 2015			As of December 31, 2014
Currently-paying contracts
$	335,905	(1)	$	410,905	(1)	Swap	0.717	Various	Various	$	(1,502	)	$	(241	)
133,237		(2)	142,965		(2)	Swap	0.925	July 17, 2012	April 18, 2017	1,435			669
469,142			553,870							(67		)	428
Forward-starting contracts
—		(3)	150,000			Forward-starting Swap	2.091	July 15, 2014	July 15, 2019	—			(2,837		)
Total
$	469,142		$	703,870						$	(67	)	$	(2,409	)

(1) Represents the U.S. dollar tranche of the unsecured term loan.

(2) Represents a portion of the Singapore dollar tranche of the unsecured term loan. Translation to U.S. dollars is based on exchange rate of $0.70 to 1.00 SGD as of September 30, 2015 and $0.75 to 1.00 SGD as of December 31, 2014.

(3) In January 2014, we entered into a forward-starting five-year swap contract to protect against adverse fluctuations in interest rates by reducing our exposure to variability in cash flows relating to interest payments on a forecasted issuance of debt. The accrual period of the swap contract was designed to match the tenor of the planned debt issuance. In the fourth quarter of 2014, changes in the forecasted transaction resulted in the discontinuation of cash flow hedge accounting. As such, changes in the fair value of the forward starting swap were recognized in earnings, within the other income (expense) line item. During the three months ended March 31, 2015, the total net loss recognized on the forward starting swap was approximately $1.6 million, and on January 13, 2015, we cash settled the forward starting swap for approximately $5.7 million, including accrued interest.

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Debt of the Operating Partnership (Outstanding Indebtedness - Unsecured Term Loan) (Details) $ in Thousands	Sep. 30, 2015 USD ($) $ / £ $ / SGD $ / € $ / AUD	Dec. 31, 2014 USD ($) $ / £ $ / SGD $ / € $ / AUD
SGD
Debt Instrument [Line Items]
Exchange rate | $ / SGD	0.70	0.75
Unsecured term loan
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 938,276	$ 976,600
Digital Realty Trust, L.P. | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £	1.51	1.56
Digital Realty Trust, L.P. | EUR
Debt Instrument [Line Items]
Exchange rate | $ / €	1.12	1.21
Digital Realty Trust, L.P. | AUD
Debt Instrument [Line Items]
Exchange rate | $ / AUD	0.70	0.82
Digital Realty Trust, L.P. | Unsecured term loan
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 938,276	$ 976,600
Weighted-average interest rate	1.72%	1.66%
Digital Realty Trust, L.P. | Unsecured term loan | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate	1.94%	2.00%
Digital Realty Trust, L.P. | Unsecured term loan | USD
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 410,905	$ 410,905
Weighted-average interest rate	1.40%	1.36%
Digital Realty Trust, L.P. | Unsecured term loan | USD | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate	1.88%	1.92%
Digital Realty Trust, L.P. | Unsecured term loan | SGD
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 160,659	$ 172,426
Weighted-average interest rate	2.08%	1.45%
Digital Realty Trust, L.P. | Unsecured term loan | SGD | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate	2.16%	2.01%
Digital Realty Trust, L.P. | Unsecured term loan | GBP
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 182,935	$ 188,365
Weighted-average interest rate	1.78%	1.76%
Digital Realty Trust, L.P. | Unsecured term loan | EUR
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 111,211	$ 120,375
Weighted-average interest rate	1.20%	1.22%
Digital Realty Trust, L.P. | Unsecured term loan | AUD
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 72,566	$ 84,529
Weighted-average interest rate	3.34%	3.98%

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Equity And Accumulated Other Comprehensive Income, Net (Schedule Of Dividends/Distributions) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares
February 25, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	Feb. 25, 2015
Dividend/Distribution payment date	Mar. 31, 2015
May 12, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	May 12, 2015
Dividend/Distribution payment date	Jun. 30, 2015
August 11, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	Aug. 11, 2015
Dividend/Distribution payment date	Sep. 30, 2015
Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 15,093
Preferred stock dividend per share amount | $ / shares	$ 1.750
Series E Preferred Units | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 5,031
Series E Preferred Units | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	5,031
Series E Preferred Units | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	5,031
Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 9,069
Preferred stock dividend per share amount | $ / shares	$ 1.656
Series F Preferred Units | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 3,023
Series F Preferred Units | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	3,023
Series F Preferred Units | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	3,023
Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 11,016
Preferred stock dividend per share amount | $ / shares	$ 1.469
Series G Preferred Units | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 3,672
Series G Preferred Units | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	3,672
Series G Preferred Units | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	3,672
Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 20,190
Preferred stock dividend per share amount | $ / shares	$ 1.844
Series H Preferred Units | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 6,730
Series H Preferred Units | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	6,730
Series H Preferred Units | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	6,730
Common Stock
Dividends Payable [Line Items]
Dividends/Distributions, common units	$ 346,331
Common stock dividend per share amount | $ / shares	$ 3.400
Common Stock | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, common units	$ 115,419
Common Stock | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, common units	115,458
Common Stock | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, common units	$ 115,454

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Income per Unit (Summary Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income available to common unitholders	$ 38,522	$ 109,314	$ 257,305	$ 185,010
Weighted average shares/units outstanding-basic (shares)	135,832,503	135,492,618	135,782,831	132,635,894
Stock options (units)	19,983	52,629	20,629	46,649
Unvested incentive units (units)	86,190	129,024	65,752	61,122
2014 market performance-based awards (units)	618,078	272,262	483,538	109,301
Weighted average shares/units outstanding-diluted (shares)	138,259,936	135,946,533	136,920,477	132,852,966
Basic ($ per share/unit)	$ 0.28	$ 0.81	$ 1.89	$ 1.39
Diluted ($ per share/unit)	$ 0.28	$ 0.80	$ 1.88	$ 1.39
Digital Realty Trust, L.P.
Net income available to common unitholders	$ 38,116	$ 111,586	$ 261,302	$ 188,848
Weighted average shares/units outstanding-basic (shares)	138,467,947	138,308,130	138,481,046	135,381,624
Stock options (units)	19,983	52,629	20,629	46,649
Unvested incentive units (units)	86,190	129,024	65,752	61,122
2014 market performance-based awards (units)	618,078	272,262	483,538	109,301
Weighted average shares/units outstanding-diluted (shares)	139,192,198	138,762,045	139,050,965	135,598,696
Basic ($ per share/unit)	$ 0.28	$ 0.81	$ 1.89	$ 1.39
Diluted ($ per share/unit)	$ 0.27	$ 0.80	$ 1.88	$ 1.39

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Acquired Intangible Assets And Liabilities (Schedule Of Estimated Annual Amortization Of Acquired In Place Leases) (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Acquired Intangible Assets And Liabilities [Abstract]
Remainder of 2015	$ 8,371
2016	31,893
2017	27,367
2018	25,100
2019	22,600
Thereafter	76,829
Net	$ 192,160

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Condensed Consolidated Statements Of Cash Flows (Parenthetical) - Senior Notes:	Sep. 30, 2015	Jun. 23, 2015
3.95% notes due 2022
Stated interest rate	3.95%	3.95%
4.75% notes due 2023
Stated interest rate	4.75%
Digital Realty Trust, L.P. | 3.95% notes due 2022
Stated interest rate	3.95%
Digital Realty Trust, L.P. | 4.75% notes due 2023
Stated interest rate	4.75%

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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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	30,365,091	20,443,722	29,947,931	22,322,087
Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	27,729,647	20,217,981	27,249,716	20,824,283
Potentially dilutive 2029 Debentures
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	0	0	0	2,617,790
Potentially dilutive 2029 Debentures | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	0	1,121,910	0	3,948,379
Series E Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	4,567,661	4,673,322	4,440,429	5,136,112
Series E Preferred Units | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	4,567,661	5,060,744	4,440,429	5,367,507
Series F Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	2,896,800	2,963,810	2,816,110	3,257,310
Series F Preferred Units | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	2,896,800	3,209,512	2,816,110	3,404,060
Series G Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	3,960,900	4,052,525	3,850,569	4,453,839
Series G Preferred Units | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	3,960,900	4,388,483	3,850,569	4,654,496
Series H Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	5,804,286	5,938,553	5,642,608	4,111,306
Series H Preferred Units | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	5,804,286	6,437,332	5,642,608	3,449,841
Units subject to Forward Equity Offering
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	10,500,000	0	10,500,000	0
Units subject to Forward Equity Offering | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	10,500,000	0	10,500,000	0

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Investment In Unconsolidated Joint Ventures (Summary Of Financial Information For Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Net investment in properties			$ 763,828		$ 779,752
Total assets	$ 939,481		939,481		942,107
Debt	460,418		460,418		461,548
Total liabilities	558,704		558,704		569,895
Equity (deficit)	380,777		380,777		372,212
Investment in unconsolidated joint ventures	103,703		103,703		$ 94,729
Revenues			96,407	$ 71,882
Property operating expense			(26,431)	(17,409)
Net operating income			69,976	54,473
Net income (loss)			28,303	23,350
Investment in and share of net income (loss)	$ 4,169	$ 3,455	$ 12,170	$ 9,513

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Investment In Unconsolidated Joint Ventures (Tables)

9 Months Ended

Sep. 30, 2015

Equity Method Investments and Joint Ventures [Abstract]

Summary Of Financial Information For Joint Ventures

The following tables present summarized financial information for the joint ventures as of September 30, 2015 and December 31, 2014 and for the nine months ended September 30, 2015 and 2014 (unaudited, in thousands):

	As of September 30, 2015										Nine Months Ended September 30, 2015
2015	Net Investment in Properties		Total Assets		Debt		Total Liabilities		Equity		Revenues		Property Operating Expense			Net Operating Income		Net Income
Total Unconsolidated Joint Ventures	$	763,828	$	939,481	$	460,418	$	558,704	$	380,777	$	96,407	$	(26,431	)	$	69,976	$	28,303
Our investment in and share of equity in earnings of unconsolidated joint ventures									$	103,703								$	12,170
	As of December 31, 2014										Nine Months Ended September 30, 2014
2014	Net Investment in Properties		Total Assets		Debt		Total Liabilities		Equity		Revenues		Property Operating Expense			Net Operating Income		Net Income
Total Unconsolidated Joint Ventures	$	779,752	$	942,107	$	461,548	$	569,895	$	372,212	$	71,882	$	(17,409	)	$	54,473	$	23,350
Our investment in and share of equity in earnings of unconsolidated joint ventures									$	94,729								$	9,513

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Investments In Real Estate (Tables)

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition

We acquired the following real estate properties during the nine months ended September 30, 2015:

Location	Metropolitan Area	Date Acquired	Amount (in millions) (1)
Deer Park 3 (2)	Melbourne	April 15, 2015	$	1.6
3 Loyang Way (3)(4)	Singapore	June 25, 2015	45.0
			$	46.6

(1) Purchase price in U.S. dollars and excludes capitalized closing costs on land acquisitions. Purchase prices for acquisitions outside the United States are based on the exchange rate at the date of acquisition.

(2) Represents currently vacant land which is not included in our operating property count.

(3) Represents a development property with an existing shell, which is included in our operating property count. This acquisition lacked key inputs to qualify as a business combination under purchase accounting guidance, and has therefore been accounted for as an asset acquisition, not a business combination.

(4) Property is subject to a ground lease, which expires in February 2024, with a renewal provision of an additional 28 years upon satisfaction of certain requirements.

Disposal Groups, Including Discontinued Operations

We sold the following real estate properties during the nine months ended September 30, 2015:

Location	Metropolitan Area	Date Sold	Gross Proceeds (in millions)			Gain on Sale (in millions)
100 Quannapowitt Parkway	Boston	February 5, 2015	$	31.1		$	10.1
3300 East Birch Street	Los Angeles	March 31, 2015	14.2			7.5
833 Chestnut Street	Philadelphia	April 30, 2015	160.8		(1)	76.7
			$	206.1		$	94.3

(1) Gross proceeds includes a $9.0 million note receivable, which is expected to be collected by year-end.

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Debt of the Operating Partnership (3.400% Notes due 2020 and 4.750% Notes due 2025) (Narrative) (Details) - Senior Notes: - USD ($)	Oct. 05, 2015	Sep. 30, 2015
Subsequent Event
Debt Instrument [Line Items]
Redemption price	100.00%
3.400% Notes Due 2020
Debt Instrument [Line Items]
Stated interest rate		3.40%
3.400% Notes Due 2020 | Subsequent Event
Debt Instrument [Line Items]
Face amount	$ 500,000,000.0
Stated interest rate	3.40%
Principal received relative to par value	99.777%
4.750% Notes Due 2025
Debt Instrument [Line Items]
Stated interest rate		4.75%
4.750% Notes Due 2025 | Subsequent Event
Debt Instrument [Line Items]
Face amount	$ 450,000,000.0
Stated interest rate	4.75%
Principal received relative to par value	100.00%

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Acquired Intangible Assets And Liabilities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of below market leases	$ 2,200	$ 2,400	$ 6,900	$ 7,700
Expected average remaining lives of acquired below market leases			2052 days
Amortization of intangible assets			$ 51,112	64,541
Acquired Above-Market Lease Value
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives			1223 days
Acquired-In Place Lease Value
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives			2179 days
Amortization of intangible assets	$ 10,100	$ 16,500	$ 32,200	$ 50,000
Weighted average remaining contractual life for acquired leases excluding renewals or extensions			1683 days

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Acquired Intangible Assets And Liabilities (Tables)

9 Months Ended

Sep. 30, 2015

Acquired Intangible Assets And Liabilities [Abstract]

Summary Of Acquired Intangible Assets

The following summarizes our acquired intangible assets (acquired in-place lease value and acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of September 30, 2015 and December 31, 2014.

	Balance as of
(Amounts in thousands)	September 30, 2015			December 31, 2014
Acquired in-place lease value:
Gross amount	$	652,629		$	680,419
Accumulated amortization	(460,469		)	(452,739		)
Net	$	192,160		$	227,680
Acquired above-market leases:
Gross amount	$	118,881		$	126,677
Accumulated amortization	(88,264		)	(88,072		)
Net	$	30,617		$	38,605
Acquired below-market leases:
Gross amount	$	278,514		$	282,670
Accumulated amortization	(189,882		)	(178,435		)
Net	$	88,632		$	104,235

Schedule Of Estimated Annual Amortization Of Below Market Leases

Estimated annual amortization of acquired below-market leases, net of acquired above-market leases, for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows:

(Amounts in thousands)
Remainder of 2015	$	1,994
2016	7,554
2017	6,143
2018	4,534
2019	4,610
Thereafter	33,180
Total	$	58,015

Schedule Of Estimated Annual Amortization Of Acquired In Place Leases

Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows:

(Amounts in thousands)
Remainder of 2015	$	8,371
2016	31,893
2017	27,367
2018	25,100
2019	22,600
Thereafter	76,829
Total	$	192,160

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Debt of the Operating Partnership (Tables) - Digital Realty Trust, L.P.

9 Months Ended

Sep. 30, 2015

Debt Instrument [Line Items]

Summary Of Outstanding Indebtedness Of The Operating Partnership

A summary of outstanding indebtedness of the Operating Partnership as of September 30, 2015 and December 31, 2014 is as follows (in thousands):

Indebtedness	Interest Rate at September 30, 2015		Maturity Date		Principal Outstanding September 30, 2015				Principal Outstanding December 31, 2014
Global revolving credit facility	Various	(1)	Nov 3, 2017		$	688,957		(2)	$	525,951		(2)
Unsecured term loan	Various	(3)(6)	Apr 16, 2017		938,276			(4)	976,600			(4)
Unsecured senior notes:
Prudential Shelf Facility:
Series C	9.680%		Jan 6, 2016		25,000				25,000
Series D	4.570%		Jan 20, 2015		—			(7)	50,000
Series E	5.730%		Jan 20, 2017		50,000				50,000
Series F	4.500%		Feb 3, 2015		—			(7)	17,000
Total Prudential Shelf Facility					75,000				142,000
Senior Notes:
4.50% notes due 2015	4.500%		Jul 15, 2015	(8)	—				375,000
5.875% notes due 2020	5.875%		Feb 1, 2020		500,000				500,000
5.25% notes due 2021	5.250%		Mar 15, 2021		400,000				400,000
3.95% notes due 2022	3.950%		Jul 1, 2022	(9)	500,000				—
3.625% notes due 2022	3.625%		Oct 1, 2022		300,000				300,000
4.75% notes due 2023	4.750%		Oct 13, 2023		453,840			(10)	467,310			(10)
4.25% notes due 2025	4.250%		Jan 17, 2025		605,120			(10)	623,080			(10)
Unamortized discounts					(17,601		)		(15,632		)
Total senior notes, net of discount					2,741,359				2,649,758
Total unsecured senior notes, net of discount					2,816,359				2,791,758

Indebtedness	Interest Rate at September 30, 2015	Maturity Date	Principal Outstanding September 30, 2015			Principal Outstanding December 31, 2014
Mortgage loans:
200 Paul Avenue 1-4 (5)	5.74%	Oct 8, 2015	—		(11)	68,665
2045 & 2055 Lafayette Street (5)	5.93%	Feb 6, 2017	61,728			62,563
34551 Ardenwood Boulevard 1-4 (5)	5.95%	Nov 11, 2016	50,700			51,339
1100 Space Park Drive (5)	5.89%	Dec 11, 2016	50,648			51,295
600 West Seventh Street	5.80%	Mar 15, 2016	46,466			47,825
150 South First Street (5)	6.30%	Feb 6, 2017	48,699			49,316
2334 Lundy Place (5)	5.96%	Nov 11, 2016	36,875			37,340
8025 North Interstate 35	4.09%	Mar 6, 2016	5,857			6,057
731 East Trade Street	8.22%	Jul 1, 2020	3,539			3,836
Unamortized net premiums			475			582
Total mortgage loans, including premiums			304,987			378,818
Total indebtedness			$	4,748,579		$	4,673,127

_________________________________ 

(1) The interest rate for borrowings under the global revolving credit facility equals the applicable index plus a margin of 110 basis points, which is based on the current credit ratings of our long-term debt. An annual facility fee of 20 basis points, which is based on the credit ratings of our long-term debt, is due and payable quarterly on the total commitment amount of the facility. Twosix-month extensions are available, which we may exercise if certain conditions are met.

(2) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands):

Denomination of Draw	Balance as of September 30, 2015			Weighted-average interest rate		Balance as of December 31, 2014			Weighted-average interest rate
Floating Rate Borrowing (a)
U.S. dollar ($)	$	50,000		1.29	%	$	90,000		1.27	%
British pound sterling (£)	110,434		(c)	1.62	%	132,716		(d)	1.61	%
Euro (€)	214,822		(c)	1.00	%	58,071		(d)	1.13	%
Australian dollar (AUD)	88,497		(c)	3.15	%	72,676		(d)	3.74	%
Hong Kong dollar (HKD)	88,476		(c)	1.36	%	79,336		(d)	1.34	%
Japanese yen (JPY)	14,265		(c)	1.13	%	13,201		(d)	1.17	%
Singapore dollar (SGD)	46,475		(c)	2.42	%	6,565		(d)	1.64	%
Canadian dollar (CAD)	70,988		(c)	1.86	%	62,386		(d)	2.39	%
Total	$	683,957		1.63	%	$	514,951		1.84	%
Base Rate Borrowing (b)
U.S. dollar ($)	$	5,000		3.35	%	$	11,000		3.35	%
Total borrowings	$	688,957		1.65	%	$	525,951		1.87	%

(a) The interest rates for floating rate borrowings under the global revolving credit facility equal the applicable index plus a margin of 110 basis points, which is based on the credit ratings of our long-term debt.

(b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt.

(c) Based on exchange rates of $1.51 to £1.00, $1.12 to €1.00, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.70 to 1.00 SGD and $0.75 to 1.00 CAD, respectively, as of September 30, 2015.

(d) Based on exchange rates of $1.56 to £1.00, $1.21 to €1.00, $0.82 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.75 to 1.00 SGD and $0.86 to 1.00 CAD, respectively, as of December 31, 2014.

(3) Interest rates are based on our current senior unsecured debt ratings and are 120 basis points over the applicable index for floating rate advances. Twosix-month extensions are available, which we may exercise if certain conditions are met.

(4) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands):

Denomination of Draw	Balance as of September 30, 2015			Weighted-average interest rate			Balance as of December 31, 2014			Weighted-average interest rate
U.S. dollar ($)	$	410,905		1.40	%	(b)	$	410,905		1.36	%	(d)
Singapore dollar (SGD)	160,659		(a)	2.08	%	(b)	172,426		(c)	1.45	%	(d)
British pound sterling (£)	182,935		(a)	1.78	%		188,365		(c)	1.76	%
Euro (€)	111,211		(a)	1.20	%		120,375		(c)	1.22	%
Australian dollar (AUD)	72,566		(a)	3.34	%		84,529		(c)	3.98	%
Total	$	938,276		1.72	%	(b)	$	976,600		1.66	%	(d)

(a) Based on exchange rates of $0.70 to 1.00 SGD, $1.51 to £1.00, $1.12 to €1.00 and $0.70 to 1.00 AUD, respectively, as of September 30, 2015.

(b) As of September 30, 2015, the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.16% (Singapore dollar) and 1.94% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps.

(c) Based on exchange rates of $0.75 to 1.00 SGD, $1.56 to £1.00, $1.21 to €1.00 and $0.82 to 1.00 AUD, respectively, as of December 31, 2014.

(d) As of December 31, 2014, the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.01% (Singapore dollar) and 2.00% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps.

(5) The respective borrower’s assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

(6) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by the U.S. dollar and Singapore dollar tranches of the unsecured term loan. See Note 14 "Derivative Instruments" for further information.

(7) These unsecured senior notes were repaid in full at maturity.

(8) On May 26, 2015, the Operating Partnership redeemed the entire outstanding principal amount of its 4.500% Notes due 2015 (2015 Notes), at a redemption price of 100% of the principal amount of the 2015 Notes plus accrued and unpaid interest thereon up to, but excluding, the redemption date.

(9) On June 23, 2015, the Operating Partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum. The purchase price paid by the initial purchasers was 99.236% of the principal amount.

(10) Based on exchange rate of $1.51 to £1.00 as of September 30, 2015 and $1.56 to £1.00 as of December 31, 2014.

(11) This loan was repaid in full in September 2015.

Schedule Of Balances And Foreign Currency Translation Revolving Credit Facilities

Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands):

Denomination of Draw	Balance as of September 30, 2015			Weighted-average interest rate			Balance as of December 31, 2014			Weighted-average interest rate
U.S. dollar ($)	$	410,905		1.40	%	(b)	$	410,905		1.36	%	(d)
Singapore dollar (SGD)	160,659		(a)	2.08	%	(b)	172,426		(c)	1.45	%	(d)
British pound sterling (£)	182,935		(a)	1.78	%		188,365		(c)	1.76	%
Euro (€)	111,211		(a)	1.20	%		120,375		(c)	1.22	%
Australian dollar (AUD)	72,566		(a)	3.34	%		84,529		(c)	3.98	%
Total	$	938,276		1.72	%	(b)	$	976,600		1.66	%	(d)

(a) Based on exchange rates of $0.70 to 1.00 SGD, $1.51 to £1.00, $1.12 to €1.00 and $0.70 to 1.00 AUD, respectively, as of September 30, 2015.

(b) As of September 30, 2015, the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.16% (Singapore dollar) and 1.94% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps.

(c) Based on exchange rates of $0.75 to 1.00 SGD, $1.56 to £1.00, $1.21 to €1.00 and $0.82 to 1.00 AUD, respectively, as of December 31, 2014.

(d) As of December 31, 2014, the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.01% (Singapore dollar) and 2.00% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps.

Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands):

Denomination of Draw	Balance as of September 30, 2015			Weighted-average interest rate		Balance as of December 31, 2014			Weighted-average interest rate
Floating Rate Borrowing (a)
U.S. dollar ($)	$	50,000		1.29	%	$	90,000		1.27	%
British pound sterling (£)	110,434		(c)	1.62	%	132,716		(d)	1.61	%
Euro (€)	214,822		(c)	1.00	%	58,071		(d)	1.13	%
Australian dollar (AUD)	88,497		(c)	3.15	%	72,676		(d)	3.74	%
Hong Kong dollar (HKD)	88,476		(c)	1.36	%	79,336		(d)	1.34	%
Japanese yen (JPY)	14,265		(c)	1.13	%	13,201		(d)	1.17	%
Singapore dollar (SGD)	46,475		(c)	2.42	%	6,565		(d)	1.64	%
Canadian dollar (CAD)	70,988		(c)	1.86	%	62,386		(d)	2.39	%
Total	$	683,957		1.63	%	$	514,951		1.84	%
Base Rate Borrowing (b)
U.S. dollar ($)	$	5,000		3.35	%	$	11,000		3.35	%
Total borrowings	$	688,957		1.65	%	$	525,951		1.87	%

(a) The interest rates for floating rate borrowings under the global revolving credit facility equal the applicable index plus a margin of 110 basis points, which is based on the credit ratings of our long-term debt.

(b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt.

(c) Based on exchange rates of $1.51 to £1.00, $1.12 to €1.00, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.70 to 1.00 SGD and $0.75 to 1.00 CAD, respectively, as of September 30, 2015.

(d) Based on exchange rates of $1.56 to £1.00, $1.21 to €1.00, $0.82 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.75 to 1.00 SGD and $0.86 to 1.00 CAD, respectively, as of December 31, 2014.

Schedule Of Debt Maturities And Principal Maturities

The table below summarizes our debt maturities and principal payments as of September 30, 2015 (in thousands):

	Global Revolving Credit Facility(1)		Unsecured Term Loan (1)		Prudential Shelf Facility		Senior Notes			Mortgage Loans		Total Debt
Remainder of 2015	$	—	$	—	$	—	$	—		$	1,768	$	1,768
2016	—		—		25,000		—			191,979		216,979
2017	688,957		938,276		50,000		—			108,395		1,785,628
2018	—		—		—		—			593		593
2019	—		—		—		—			644		644
Thereafter	—		—		—		2,758,960			1,133		2,760,093
Subtotal	$	688,957	$	938,276	$	75,000	$	2,758,960		$	304,512	$	4,765,705
Unamortized discount	—		—		—		(17,601		)	—		(17,601		)
Unamortized premium	—		—		—		—			475		475
Total	$	688,957	$	938,276	$	75,000	$	2,741,359		$	304,987	$	4,748,579

(1) Subject to twosix-month extension options exercisable by us. The bank group is obligated to grant the extension options provided we give proper notice, we make certain representations and warranties and no default exists under the global revolving credit facility and the unsecured term loan, as applicable.

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Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 318,164	$ 238,210
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of properties	(94,282)	(15,945)
Gain on contribution of investment property to unconsolidated joint venture	0	(95,404)
Impairment of investments in real estate	0	12,500
Equity in earnings of unconsolidated joint ventures	(12,170)	(9,513)
Change in fair value of accrued contingent consideration	(44,276)	(4,102)
Distributions from unconsolidated joint ventures	10,786	6,032
Write-off of net assets due to early lease terminations	(8)	2,239
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases	346,459	340,645
Amortization of share-based compensation	5,717	15,489
Allowance for doubtful accounts	739	2,076
Amortization of deferred financing costs	6,360	6,762
Loss on early extinguishment of debt	148	780
Amortization of debt discount/premium	1,472	1,352
Amortization of acquired in-place lease value and deferred leasing costs	51,112	64,541
Amortization of acquired above-market leases and acquired below-market leases, net	(6,856)	(7,710)
Changes in assets and liabilities:
Restricted cash	2,878	11,060
Accounts and other receivables	(1,382)	(16,377)
Deferred rent	(41,447)	(58,874)
Deferred leasing costs	(2,611)	(15,178)
Other assets	(14,869)	(12,895)
Accounts payable and other accrued liabilities	13,213	3,668
Security deposits and prepaid rents	60	3,211
Net cash provided by operating activities	539,207	472,567
Cash flows from investing activities:
Acquisitions of real estate	(48,424)	(24,305)
Proceeds from sale of properties, net	185,565	37,945
Proceeds from contribution of investment properties to unconsolidated joint ventures	0	178,933
Investment in unconsolidated joint ventures	(7,547)	(20,627)
Investment in equity securities	0	(2)
Receipt of value added tax refund	2,934	8,457
Refundable value added tax paid	(24,142)	(13,882)
Change in restricted cash	1,520	15,237
Improvements to investments in real estate	(535,141)	(644,637)
Improvement advances to tenants	(26,977)	(15,505)
Collection of advances from tenants for improvements	26,971	13,500
Net cash used in investing activities	(425,241)	(464,886)
Cash flows from financing activities:
Borrowings on revolving credit facility	1,430,671	952,590
Repayments on revolving credit facility	(1,240,340)	(1,182,341)
Principal payments on unsecured notes	(374,927)	0
Repayments on other unsecured loans	(67,000)	0
Principal payments on mortgage loans	(73,724)	(139,974)
Earnout payments related to acquisitions	(12,985)	(11,011)
Change in restricted cash	1,137	1,169
Payment of loan fees and costs	(5,116)	(5,209)
Capital distributions paid to noncontrolling interests in consolidated joint ventures, net	(372)	(501)
Gross proceeds from the issuance of preferred stock	250,000	365,000
Common and preferred stock offering costs paid, net	(5,934)	(11,921)
Proceeds from exercise of stock options	798	237
Payment of dividends/distributions to preferred stockholders/unitholders	(55,367)	(49,010)
Payment of dividends/distributions to common unit/stockholders and distributions to noncontrolling interests in operating partnership	(468,813)	(441,735)
Net cash used in financing activities	(125,782)	(26,834)
Net decrease in cash and cash equivalents	(11,816)	(19,153)
Cash and cash equivalents at beginning of period	34,814	50,080
Cash and cash equivalents at end of period	22,998	30,927
Supplemental disclosure of cash flow information:
Cash paid for interest	146,105	150,212
Cash paid for income taxes	2,979	3,012
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	(41,480)	(30,104)
Decrease in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps	(4,374)	(3,572)
Noncontrolling interests in operating partnership redeemed for or converted to shares of common stock	1,364	229
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses	115,632	199,916
Accrual for potential earnout contingency	18,900	12,816
Issuance of common units associated with exchange of exchangeable senior debentures	0	261,166
Note receivable related to sale of property	9,000	0
Investments in real estate	48,424	24,305
Cash paid for acquisition of real estate	48,424	24,305
Digital Realty Trust, L.P.
Cash flows from operating activities:
Net income	317,011	238,210
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of properties	(94,282)	(15,945)
Gain on contribution of investment property to unconsolidated joint venture	0	(95,404)
Impairment of investments in real estate	0	12,500
Equity in earnings of unconsolidated joint ventures	(12,170)	(9,513)
Change in fair value of accrued contingent consideration	(44,276)	(4,102)
Distributions from unconsolidated joint ventures	10,786	6,032
Write-off of net assets due to early lease terminations	(8)	2,239
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases	346,459	340,645
Amortization of share-based compensation	5,717	15,489
Allowance for doubtful accounts	739	2,076
Amortization of deferred financing costs	6,360	6,762
Loss on early extinguishment of debt	148	780
Amortization of debt discount/premium	1,472	1,352
Amortization of acquired in-place lease value and deferred leasing costs	51,112	64,541
Amortization of acquired above-market leases and acquired below-market leases, net	(6,856)	(7,710)
Changes in assets and liabilities:
Restricted cash	2,878	11,060
Accounts and other receivables	(1,382)	(16,377)
Deferred rent	(41,447)	(58,874)
Deferred leasing costs	(2,611)	(15,178)
Other assets	(14,869)	(12,895)
Accounts payable and other accrued liabilities	14,366	3,668
Security deposits and prepaid rents	60	3,211
Net cash provided by operating activities	539,207	472,567
Cash flows from investing activities:
Acquisitions of real estate	(48,424)	(24,305)
Proceeds from sale of properties, net	185,565	37,945
Proceeds from contribution of investment properties to unconsolidated joint ventures	0	178,933
Investment in unconsolidated joint ventures	(7,547)	(20,627)
Investment in equity securities	0	(2)
Receipt of value added tax refund	2,934	8,457
Refundable value added tax paid	(24,142)	(13,882)
Change in restricted cash	1,520	15,237
Improvements to investments in real estate	(535,141)	(644,637)
Improvement advances to tenants	(26,977)	(15,505)
Collection of advances from tenants for improvements	26,971	13,500
Net cash used in investing activities	(425,241)	(464,886)
Cash flows from financing activities:
Borrowings on revolving credit facility	1,430,671	952,590
Repayments on revolving credit facility	(1,240,340)	(1,182,341)
Principal payments on unsecured notes	(374,927)	0
Repayments on other unsecured loans	(67,000)	0
Principal payments on mortgage loans	(73,724)	(139,974)
Earnout payments related to acquisitions	(12,985)	(11,011)
Change in restricted cash	1,137	1,169
Payment of loan fees and costs	(5,116)	(5,209)
Capital distributions paid to noncontrolling interests in consolidated joint ventures, net	(372)	(501)
General partner contributions, net	2,175	353,316
Due to Parent	242,689	0
Payment of dividends/distributions to preferred stockholders/unitholders	(55,367)	(49,010)
Payment of dividends/distributions to common unit/stockholders and distributions to noncontrolling interests in operating partnership	(468,813)	(441,735)
Net cash used in financing activities	(125,782)	(26,834)
Net decrease in cash and cash equivalents	(11,816)	(19,153)
Cash and cash equivalents at beginning of period	34,814	50,080
Cash and cash equivalents at end of period	22,998	30,927
Supplemental disclosure of cash flow information:
Cash paid for interest	146,105	150,212
Cash paid for income taxes	2,979	3,012
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	(41,480)	(30,104)
Decrease in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps	(4,374)	(3,572)
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses	115,632	199,916
Accrual for potential earnout contingency	18,900	12,816
Issuance of common units associated with exchange of exchangeable senior debentures	0	261,166
Note receivable related to sale of property	9,000	0
Investments in real estate	48,424	24,305
Cash paid for acquisition of real estate	48,424	24,305
3.95% notes due 2022
Cash flows from financing activities:
Repayments on other unsecured loans	496,190	0
3.95% notes due 2022 | Digital Realty Trust, L.P.
Cash flows from financing activities:
Repayments on other unsecured loans	496,190	0
4.75% notes due 2023
Cash flows from financing activities:
Repayments on other unsecured loans	0	495,872
4.75% notes due 2023 | Digital Realty Trust, L.P.
Cash flows from financing activities:
Repayments on other unsecured loans	$ 0	$ 495,872

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Income per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Summary Of Basic And Diluted Earnings Per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income available to common stockholders	$	38,522	$	109,314	$	257,305	$	185,010
Weighted average shares outstanding—basic	135,832,503		135,492,618		135,782,831		132,635,894
Potentially dilutive common shares:
Stock options	19,983		52,629		20,629		46,649
Unvested incentive units	86,190		129,024		65,752		61,122
Series I Cumulative Redeemable Preferred Stock	1,703,182		—		567,727		—
Market performance-based awards	618,078		272,262		483,538		109,301
Weighted average shares outstanding—diluted	138,259,936		135,946,533		136,920,477		132,852,966
Income per share:
Basic	$	0.28	$	0.81	$	1.89	$	1.39
Diluted	$	0.28	$	0.80	$	1.88	$	1.39

Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,635,444	2,815,512	2,698,215	2,745,730
Potentially dilutive 2029 Debentures	—	—	—	2,617,790
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	4,567,661	4,673,322	4,440,429	5,136,112
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	2,896,800	2,963,810	2,816,110	3,257,310
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	3,960,900	4,052,525	3,850,569	4,453,839
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	5,804,286	5,938,553	5,642,608	4,111,306
Shares subject to Forward Equity Offering	10,500,000	—	10,500,000	—
	30,365,091	20,443,722	29,947,931	22,322,087

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Commitments and Contingencies (Details) £ in Millions, SGD in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2015 SGD	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2015 SGD	Sep. 30, 2015 GBP (£)	Sep. 30, 2014 USD ($)	Sep. 30, 2014 GBP (£)	Dec. 31, 2014 USD ($)	Jul. 11, 2012 USD ($)	Jul. 11, 2012 GBP (£)
Commitments and Contingencies [Line Items]
Accounts payable and other accrued liabilities	$ 513,555,000				$ 513,555,000					$ 605,923,000
Reduction in fair value | £							£ 30.3
Change in fair value of contingent consideration	1,594,000			$ 1,465,000	44,276,000			$ 4,102,000
Commitments related to construction contracts	135,600,000				135,600,000
Sentrum Portfolio
Commitments and Contingencies [Line Items]
Additional performance based consideration earned (maximum)					1,100,000		£ 0.7	10,300,000	£ 6.2
Contingent liability											$ 87,600,000	£ 56.5
Change in fair value of contingent consideration	0			$ (1,500,000)	43,000,000			$ (4,100,000)
29 A International Business Park
Commitments and Contingencies [Line Items]
Accounts payable and other accrued liabilities	18,900,000				18,900,000					$ 12,400,000
Earnout payments		$ 13,000,000	SGD 17.5
Additional performance based consideration earned (maximum)					35,200,000	SGD 50.0
Convergence Business Park
Commitments and Contingencies [Line Items]
Sale price of building	$ 24,000,000				24,000,000
Real estate price, per square acre					$ 225,000

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Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segment	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Period in which short-term investment become cash equivalents			90 days
Interest capitalized	$ 2,400	$ 5,400	$ 9,900	$ 15,600
Compensation costs, leasing and construction activities	18,200	14,400	46,600	42,300
Cash flows from capitalized leasing costs			$ 37,800	37,100
Number of reportable segments | segment			1
Total operating revenues	435,989	412,186	$ 1,262,893	1,204,222
Restatement Adjustment
Summary Of Significant Accounting Policies [Line Items]
Cash reclassified to restricted cash					$ 6,500
Other Expense
Summary Of Significant Accounting Policies [Line Items]
Construction management expense reclassified to other expense		100		300
United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues	334,500	314,900	971,600	915,700
Long-lived assets	5,400,000		5,400,000		5,400,000
Outside The United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues	101,400	97,300	291,300	288,600
Long-lived assets	2,600,000		2,600,000		2,700,000
United Kingdom
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues	55,200	$ 55,100	160,100	$ 164,500
Long-lived assets	$ 1,700,000		$ 1,700,000		$ 1,700,000
Sales
Summary Of Significant Accounting Policies [Line Items]
Concentration risk	12.70%	13.40%	12.70%	13.70%
Long-Lived Assets
Summary Of Significant Accounting Policies [Line Items]
Concentration risk			20.90%		21.30%
Digital Realty Trust, L.P.
Summary Of Significant Accounting Policies [Line Items]
Due to Parent	$ 242,689		$ 242,689		$ 0
Total operating revenues	$ 435,989	$ 412,186	$ 1,262,893	$ 1,204,222

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Debt of the Operating Partnership (Global Revolving Credit Facility) (Narrative) (Details)	9 Months Ended
	Sep. 30, 2015 USD ($) extension	Dec. 31, 2014 USD ($)	Aug. 15, 2013 USD ($)	Aug. 14, 2013 USD ($)
Unsecured term loan
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 938,276,000	$ 976,600,000
Unsecured term loan | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1,000,000,000.0	$ 750,000,000.0
Maturity Date	Apr. 16, 2017
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Interest rate basis spread	1.20%
Balance as of September 30, 2015	$ 938,276,000	976,600,000
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 688,957,000	525,951,000
Global revolving credit facility | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			2,000,000,000	$ 1,800,000,000
Maturity Date	Nov. 03, 2017
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Base rate percentage	3.35%
Capitalized financing costs related to global revolving facilities	$ 18,000,000
Balance as of September 30, 2015	688,957,000	$ 525,951,000
Letter of credit security amount	$ 5,500,000
Global revolving credit facility | Digital Realty Trust, L.P. | Prime Rate
Debt Instrument [Line Items]
Interest rate basis spread	0.10%
Accordian Feature | Unsecured term loan | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			1,100,000,000.0
Accordian Feature | Global revolving credit facility | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 2,550,000,000

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Incentive Plan (Narrative) (Details) - USD ($) $ in Millions	May. 02, 2007	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares granted per employee	1,500,000
Maximum amount of cash paid per employee	$ 10.0
2004 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and reserved for issuance under the "Incentive Plan"		4,474,102
Amended And Restated 2004 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and reserved for issuance under the "Incentive Plan"	9,474,102
Increase in number of shares reserved for issuance	5,000,000
2014 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares remaining for issuance under the "Incentive Plan"		4,775,319

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Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Properties:
Land	$ 640,971	$ 671,602
Acquired ground leases	12,950	12,196
Buildings and improvements	8,980,621	8,823,814
Tenant improvements	542,652	475,000
Total investments in properties	10,177,194	9,982,612
Accumulated depreciation and amortization	(2,137,631)	(1,874,054)
Net investments in properties	8,039,563	8,108,558
Investment in unconsolidated joint ventures	103,703	94,729
Net investments in real estate	8,143,266	8,203,287
Cash and cash equivalents	22,998	34,814
Accounts and other receivables, net of allowance for doubtful accounts	157,994	135,931
Deferred rent	475,796	447,643
Acquired above-market leases, net	30,617	38,605
Acquired in-place lease value and deferred leasing costs, net	405,824	456,962
Deferred financing costs, net	29,173	30,821
Restricted cash	12,500	18,062
Assets held for sale	173,461	120,471
Other assets	49,384	40,188
Total assets	9,501,013	9,526,784
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	2,816,359	2,791,758
Mortgage loans, including premiums	304,987	378,818
Accounts payable and other accrued liabilities	513,555	605,923
Accrued dividends and distributions	0	115,019
Acquired below-market leases, net	88,632	104,235
Security deposits and prepaid rents	107,704	108,478
Obligations associated with assets held for sale	6,892	5,764
Total liabilities	$ 5,465,362	$ 5,612,546
Commitments and contingencies
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Common Stock: $0.01 par value, 215,000,000 shares authorized, 135,843,684 and 135,626,255 shares issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	$ 1,351	$ 1,349
Additional paid-in capital	3,977,945	3,970,439
Accumulated dividends in excess of earnings	(1,185,633)	(1,096,607)
Accumulated other comprehensive loss, net	(87,988)	(45,046)
Total stockholders’ equity	3,995,479	3,878,256
Noncontrolling Interests:
Noncontrolling interests in operating partnership	33,411	29,191
Noncontrolling interests in consolidated joint ventures	6,761	6,791
Total noncontrolling interests	40,172	35,982
Total equity	4,035,651	3,914,238
Total liabilities and equity/capital	9,501,013	9,526,784
Digital Realty Trust, L.P.
Properties:
Land	640,971	671,602
Acquired ground leases	12,950	12,196
Buildings and improvements	8,980,621	8,823,814
Tenant improvements	542,652	475,000
Total investments in properties	10,177,194	9,982,612
Accumulated depreciation and amortization	(2,137,631)	(1,874,054)
Net investments in properties	8,039,563	8,108,558
Investment in unconsolidated joint ventures	103,703	94,729
Net investments in real estate	8,143,266	8,203,287
Cash and cash equivalents	22,998	34,814
Accounts and other receivables, net of allowance for doubtful accounts	157,994	135,931
Deferred rent	475,796	447,643
Acquired above-market leases, net	30,617	38,605
Acquired in-place lease value and deferred leasing costs, net	405,824	456,962
Deferred financing costs, net	29,173	30,821
Restricted cash	12,500	18,062
Assets held for sale	173,461	120,471
Other assets	49,384	40,188
Total assets	9,501,013	9,526,784
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	2,816,359	2,791,758
Mortgage loans, including premiums	304,987	378,818
Accounts payable and other accrued liabilities	513,702	605,923
Due to Parent	242,689	0
Accrued dividends and distributions	0	115,019
Acquired below-market leases, net	88,632	104,235
Security deposits and prepaid rents	107,704	108,478
Obligations associated with assets held for sale	6,892	5,764
Total liabilities	$ 5,708,198	$ 5,612,546
Commitments and contingencies
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
135,843,684 and 135,626,255 units issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	$ 2,792,510	$ 2,875,181
Limited partners, 1,421,314 and 1,463,814 common units, 1,035,062 and 1,170,610 profits interest units and 379,237 and 379,237 class C units outstanding as of September 30, 2015 and December 31, 2014, respectively	37,633	32,578
Accumulated other comprehensive loss, net	(92,210)	(48,433)
Total partners’ capital	3,786,054	3,907,447
Noncontrolling Interests:
Noncontrolling interests in consolidated joint ventures	6,761	6,791
Total capital	3,792,815	3,914,238
Total liabilities and equity/capital	9,501,013	9,526,784
Series E Preferred Units
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	277,172	277,172
Series E Preferred Units | Digital Realty Trust, L.P.
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	277,172	277,172
Series F Preferred Units
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	176,191	176,191
Series F Preferred Units | Digital Realty Trust, L.P.
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	176,191	176,191
Series G Preferred Units
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	241,468	241,468
Series G Preferred Units | Digital Realty Trust, L.P.
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	241,468	241,468
Series H Preferred Units
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	353,290	353,290
Series H Preferred Units | Digital Realty Trust, L.P.
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	353,290	353,290
Series I Preferred Stock
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	241,683	0
Global revolving credit facility
LIABILITIES AND EQUITY
Line of credit	688,957	525,951
Global revolving credit facility | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	688,957	525,951
Unsecured term loan
LIABILITIES AND EQUITY
Line of credit	938,276	976,600
Unsecured term loan | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	$ 938,276	$ 976,600

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Acquired Intangible Assets And Liabilities (Summary Of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Net	$ 192,160
Below-market lease, gross amount	278,514	$ 282,670
Below-market lease, accumulated amortization	(189,882)	(178,435)
Below-market lease, net	88,632	104,235
Acquired-In Place Lease Value
Finite-Lived Intangible Assets [Line Items]
Gross amount	652,629	680,419
Accumulated amortization	(460,469)	(452,739)
Net	192,160	227,680
Acquired Above-Market Lease Value
Finite-Lived Intangible Assets [Line Items]
Gross amount	118,881	126,677
Accumulated amortization	(88,264)	(88,072)
Net	$ 30,617	$ 38,605

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Condensed Consolidated Statement Of Equity - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Dividends in Excess of Earnings	Accumulated Other Comprehensive Loss, Net	Total Stockholders’ Equity	Noncontrolling Interests in Operating Partnership	Noncontrolling Interests in Consolidated Joint Ventures	Total Noncontrolling Interests
Balance as of December 31, 2014 at Dec. 31, 2014	$ 3,914,238	$ 1,048,121	$ 1,349	$ 3,970,439	$ (1,096,607)	$ (45,046)	$ 3,878,256	$ 29,191	$ 6,791	$ 35,982
Shares, Outstanding, Beginning Balance at Dec. 31, 2014			135,626,255
Conversion of units to common stock			$ 2	1,362			1,364	(1,364)		(1,364)
Conversion of units to common stock (shares)			118,587
Issuance of unvested restricted stock, net of forfeitures (shares)			71,881
Common stock offering costs, net	1,498			1,498			1,498
Exercise of stock options	$ 798			798			798
Exercise of stock options (shares)	26,961		26,961
Issuance of series I preferred stock, net of offering costs	$ 241,683	241,683					241,683
Amortization of share-based compensation	12,450			12,450			12,450
Reclassification of vested share-based awards				(8,602)			(8,602)	8,602		8,602
Dividends declared on preferred stock	(55,367)				(55,367)		(55,367)
Dividends and distributions on common stock and common and incentive units	(353,664)				(346,331)		(346,331)	(7,333)		(7,333)
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions	(372)								(372)	(372)
Net income	318,164				312,672		312,672	5,150	342	5,492
Other comprehensive income—foreign currency translation adjustments	(41,480)					(40,688)	(40,688)	(792)		(792)
Other comprehensive loss—fair value of interest rate swaps	(4,374)					(4,290)	(4,290)	(84)		(84)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense	2,077					2,036	2,036	41		41
Shares, Outstanding, Ending Balance at Sep. 30, 2015			135,843,684
Balance as of September 30, 2015 at Sep. 30, 2015	$ 4,035,651	$ 1,289,804	$ 1,351	$ 3,977,945	$ (1,185,633)	$ (87,988)	$ 3,995,479	$ 33,411	$ 6,761	$ 40,172

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Income per Share (Summary Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 38,522	$ 109,314	$ 257,305	$ 185,010
Weighted average shares/units outstanding-basic (shares)	135,832,503	135,492,618	135,782,831	132,635,894
Stock options (shares)	19,983	52,629	20,629	46,649
Unvested incentive units (shares)	86,190	129,024	65,752	61,122
Series I Cumulative Redeemable Preferred Stock (shares)	1,703,182	0	567,727	0
2014 market performance-based awards (shares)	618,078	272,262	483,538	109,301
Weighted average shares/units outstanding-diluted (shares)	138,259,936	135,946,533	136,920,477	132,852,966
Basic ($ per share/unit)	$ 0.28	$ 0.81	$ 1.89	$ 1.39
Diluted ($ per share/unit)	$ 0.28	$ 0.80	$ 1.88	$ 1.39

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Capital And Accumulated Other Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2015

Schedule Of Dividends/Distributions

We have declared and paid the following dividends on our common and preferred stock for the nine months ended September 30, 2015 (in thousands, except per share data):

Date dividend declared	Dividend payment date	Series E Preferred Stock		Series F Preferred Stock		Series G Preferred Stock		Series H Preferred Stock		Common Stock
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	115,419
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		115,458
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		115,454
		$	15,093	$	9,069	$	11,016	$	20,190	$	346,331
Annual rate of dividend per share		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

Schedule Of Accumulated Other Comprehensive Income, Net

The accumulated balances for each item within other comprehensive income, net are as follows (in thousands):

	Foreign currency translation adjustments				Cash flow hedge adjustments			Accumulated other comprehensive income (loss), net
Balance as of December 31, 2014	$	(39,567	)		$	(5,479	)	$	(45,046	)
Net current period change	(40,688		)	(1)	(4,290		)	(44,978		)
Reclassification to interest expense from interest rate swaps	—				2,036			2,036
Balance as of September 30, 2015	$	(80,255	)		$	(7,733	)	$	(87,988	)

(1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

Digital Realty Trust, L.P.

Schedule Of Dividends/Distributions

The Operating Partnership has declared and paid the following distributions on its common and preferred units for the nine months ended September 30, 2015 (in thousands, except for per unit data):

Date distribution declared	Distribution payment date	Series E Preferred Units		Series F Preferred Units		Series G Preferred Units		Series H Preferred Units		Common Units
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	117,896
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		117,938
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		117,962
		$	15,093	$	9,069	$	11,016	$	20,190	$	353,796
Annual rate of distribution per unit		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

Schedule Of Accumulated Other Comprehensive Income, Net

The accumulated balances for each item within other comprehensive income are as follows (in thousands):

	Foreign currency translation adjustments				Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance as of December 31, 2014	$	(42,138	)		$	(6,295	)	$	(48,433	)
Net current period change	(41,480		)	(1)	(4,374		)	(45,854		)
Reclassification to interest expense from interest rate swaps	—				2,077			2,077
Balance as of September 30, 2015	$	(83,618	)		$	(8,592	)	$	(92,210	)

(1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

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Equity And Accumulated Other Comprehensive Income, Net (Ownership Interest In The Operating Partnership) (Details) - shares	Sep. 30, 2015	Dec. 31, 2014
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Partners' capital account units	135,843,684	135,626,255
Percentage of total	98.00%	97.80%
Common units held by third parties
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Common units held by third parties	1,421,314	1,463,814
Percentage of total	1.00%	1.10%
Incentive Units Held By Employees And Directors
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Incentive units held by employees and directors	1,414,299	1,549,847
Percentage of total	1.00%	1.10%
Noncontrolling Interests in Operating Partnership
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Partners' capital account units	138,679,297	138,639,916
Percentage of total	100.00%	100.00%

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Incentive Plan

9 Months Ended

Sep. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Incentive Plan

Incentive Plan

Our Amended and Restated 2004 Incentive Award Plan (as defined below) previously provided for the grant of incentive awards to employees, directors and consultants. Awards issuable under the Amended and Restated 2004 Incentive Award Plan included stock options, restricted stock, dividend equivalents, stock appreciation rights, long-term incentive units, cash performance bonuses and other incentive awards. Only employees were eligible to receive incentive stock options under the Amended and Restated 2004 Incentive Award Plan. Initially, we had reserved a total of 4,474,102 shares of common stock for issuance pursuant to the Digital Realty Trust, Inc., Digital Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (the 2004 Incentive Award Plan), subject to certain adjustments set forth in the 2004 Incentive Award Plan. On May 2, 2007, Digital Realty Trust, Inc.’s stockholders approved the First Amended and Restated Digital Realty Trust, Inc., Digital Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (as amended, the Amended and Restated 2004 Incentive Award Plan). The Amended and Restated 2004 Incentive Award Plan increased the aggregate number of shares of stock which could have been issued or transferred under the plan by 5,000,000 shares to a total of 9,474,102 shares, and provided that the maximum number of shares of stock with respect to awards granted to any one participant during a calendar year was 1,500,000 shares and the maximum amount that could have been paid in cash during any calendar year with respect to any performance-based award not denominated in stock or otherwise for which the foregoing limitation would not be an effective limitation for purposes of Section 162(m) of the Code was $10.0 million.

On April 28, 2014, Digital Realty Trust, Inc. held its 2014 Annual Meeting of Stockholders, or the 2014 Annual Meeting, at which the Company’s stockholders approved the Digital Realty Trust, Inc., Digital Services, Inc., and Digital Realty Trust, L.P. 2014 Incentive Award Plan (as amended, the 2014 Incentive Award Plan), which had been previously adopted by the Board of Directors and recommended to the stockholders for approval by the Company’s Board of Directors. The 2014 Incentive Award Plan became effective and replaced the Amended and Restated 2004 Incentive Award Plan as of the date of such stockholder approval. The material features of the 2014 Incentive Award Plan are described in our definitive Proxy Statement filed on March 19, 2014 in connection with the 2014 Annual Meeting, which description is incorporated herein by reference.

As of September 30, 2015, 4,775,319 shares of common stock or awards convertible into or exchangeable for common stock remained available for future issuance under the 2014 Incentive Award Plan. Each long-term incentive unit and Class D Unit issued under the 2014 Incentive Award Plan counts as one share of common stock for purposes of calculating the limit on shares that may be issued under the 2014 Incentive Award Plan and the individual award limits set forth therein.

(a) Long-Term Incentive Units

Long-term incentive units, which are also referred to as profits interest units, may be issued to eligible participants for the performance of services to or for the benefit of the Operating Partnership. Long-term incentive units (other than Class D Units), whether vested or not, will receive the same quarterly per unit distributions as Operating Partnership common units, which equal per share distributions on Digital Realty Trust, Inc. common stock. Initially, long-term incentive units do not have full parity with common units with respect to liquidating distributions. If such parity is reached, vested long-term incentive units may be converted into an equal number of common units of the Operating Partnership at any time, and thereafter enjoy all the rights of common units of the Operating Partnership, including redemption rights. For a discussion of how long-term incentive units reach parity with common units, see note 13(a) to our consolidated financial statements for the fiscal year ended December 31, 2014, included in our Annual Report on 10-K for the year ended December 31, 2014.

Below is a summary of our long-term incentive unit activity for the nine months ended September 30, 2015.

Unvested Long-term Incentive Units	Units		Weighted-Average Grant Date Fair Value
Unvested, beginning of period	314,415		$	59.34
Granted	90,679		64.79
Vested	(157,300	)	60.25
Cancelled or expired	(22,496	)	58.13
Unvested, end of period	225,298		61.03

The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock on the grant date, are being expensed on a straight-line basis for service awards over four years, the current vesting period of the long-term incentive units.

Excluding the impact of our former Chief Executive Officer's equity acceleration in 2014 and subsequent cancellation in 2015, the expense recorded for the three months ended September 30, 2015 and 2014 related to long-term incentive units was approximately $1.5 million and $1.5 million, respectively, and approximately $4.6 million and $5.2 million for the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.0 million and $0.3 million for the three months ended September 30, 2015 and 2014, respectively, and approximately $1.1 million and $1.1 million for the nine months ended September 30, 2015 and 2014, respectively. Unearned compensation representing the unvested portion of the long-term incentive units totaled $8.7 million and $9.3 million as of September 30, 2015 and December 31, 2014, respectively. We expect to recognize this unearned compensation over the next 2.3 years on a weighted-average basis.

(b) Market Performance-Based Awards

During the nine months ended September 30, 2015 and 2014, the Compensation Committee of the Board of Directors of the Company approved the grant of market performance-based Class D Units of the Operating Partnership and market performance-based restricted stock units, or RSUs, covering shares of the Company’s common stock (collectively, the “awards”), under the Amended and Restated 2004 Incentive Award Plan and 2014 Incentive Plan, respectively, to officers and employees of the Company.

The awards, which were determined to contain a market condition, utilize total shareholder return, or TSR, over a three-year measurement period as the market performance metric. Awards will vest based on the Company’s TSR relative to the MSCI US REIT Index, or RMS, over a three-year market performance period, or the Market Performance Period, commencing in January 2014 or January 2015, as applicable (or, if earlier, ending on the date on which a change in control of the Company occurs), subject to continued services. Vesting with respect to the market condition is measured based on the difference between the Company’s TSR percentage and the TSR percentage of the RMS, or the RMS Relative Market Performance. In the event that the RMS Relative Market Performance during the Market Performance Period is achieved at the “threshold,” “target” or “high” level as set forth below, the awards will become vested as to the market condition with respect to the percentage of Class D units or RSUs, as applicable, set forth below:

Level	RMS Relative Market Performance (2014 Awards)	RMS Relative Market Performance (2015 Awards)	Market Performance Vesting Percentage
Below Threshold Level	< 0 basis points	< -300 basis points	0	%
Threshold Level	0 basis points	-300 basis points	25	%
Target Level	325 basis points	100 basis points	50	%
High Level	> 650 basis points	> 500 basis points	100	%

If the RMS Relative Market Performance falls between the levels specified above, the percentage of the award that will vest with respect to the market condition will be determined using straight-line linear interpolation between such levels.

Following the completion of the Market Performance Period, the 2014 awards that have satisfied the market condition, if any, will vest 50% on February 27, 2017 and 50% on February 27, 2018, subject to continued employment through each applicable vesting date. Following the completion of the Market Performance Period, the 2015 awards that have satisfied the market condition, if any, will vest 50% on February 27, 2018 and 50% on February 27, 2019, subject to continued employment through each applicable vesting date.

Service-based vesting will be accelerated, in full or on a pro rata basis, in the event of a change in control, termination of employment by the Company without cause, or termination of employment by the award recipient for good reason, death, disability or retirement, in any case prior to the completion of the Market Performance Period. However, vesting with respect to the market condition will continue to be measured based on RMS Relative Market Performance during the three-year Market Performance Period (or, in the case of a change in control, shortened Market Performance Period).

The fair values of the 2014 awards and 2015 awards were measured using a Monte Carlo simulation to estimate the probability of the market vesting condition being satisfied. The Company’s achievement of the market vesting condition is contingent on its TSR over a three-year market performance period, relative to the total shareholder return of the RMS. The Monte Carlo simulation is a probabilistic technique based on the underlying theory of the Black-Scholes formula, which was run for 100,000 trials to determine the fair value of the awards. For each trial, the payoff to an award is calculated at the settlement date and is then discounted to the grant date at a risk-free interest rate. The total expected value of the awards on the grant date was determined by multiplying the average value per award over all trials by the number of awards granted. Assumptions used in the 2014 valuation include expected stock price volatility of 33 percent and a risk-free interest rate of 0.67 percent. Assumptions used in the 2015 valuation include expected stock price volatility of 24 percent and a risk-free interest rate of 1.00 percent. The valuations were performed in a risk-neutral framework, so no assumption was made with respect to an equity risk premium.

As of September 30, 2015, 1,148,991 Class D Units and 368,878 market performance-based RSUs had been awarded to our executive officers and other employees. The number of units granted reflects the maximum number of Class D units or market performance-based RSUs, as applicable, which will become vested assuming the achievement of the highest level of RMS Relative Market Performance under the awards and, in the case of the Class D units, also includes dividend equivalent units. The fair value of these awards of approximately $34.3 million will be recognized as compensation expense on a straight-line basis over the expected service period of approximately four years. The unearned compensation as of September 30, 2015 and December 31, 2014 was $18.9 million and $9.5 million, respectively, net of cancellations. As of September 30, 2015, none of the above awards had vested. We recognized compensation expense related to these awards of approximately $2.1 million and $0.8 million in the three months ended September 30, 2015 and 2014, respectively, and approximately $5.4 million and $2.2 million in the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation expense of employees directly engaged in construction and leasing activities of approximately $2.5 million and $0.4 million for the three months ended September 30, 2015 and 2014, respectively, and approximately $3.6 million and $1.0 million for the nine months ended September 30, 2015 and 2014, respectively. If the market conditions are not met, at the end of the applicable performance periods, the unamortized amount will be recognized as an expense at that time.

(c) Stock Options

The following table summarizes the Amended and Restated 2004 Incentive Award Plan’s stock option activity for the nine-month period ended September 30, 2015:

	Period Ended September 30, 2015
	Shares		Weighted average exercise price
Options outstanding, beginning of period	80,933		$	37.25
Exercised	(26,961	)	29.61
Options outstanding, end of period	53,972		$	41.07
Exercisable, end of period	53,972		$	41.07

The following table summarizes information about stock options outstanding and exercisable as of September 30, 2015:

Options outstanding and exercisable
Exercise price	Number outstanding	Weighted-average remaining contractual  life (years)	Weighted-average exercise price		Aggregate intrinsic value
$33.18	4,175	1.09	33.18		$	134,185
$41.73	49,797	1.59	41.73		1,174,711
Total / Weighted-average	53,972	1.55	$	41.07	$	1,308,896

(d) Restricted Stock

Below is a summary of our restricted stock activity for the nine months ended September 30, 2015.

Unvested Restricted Stock	Shares		Weighted-Average Grant Date Fair Value
Unvested, beginning of period	302,298		$	57.10
Granted	105,165		66.65
Vested	(90,871	)	59.48
Cancelled or expired	(33,284	)	57.16
Unvested, end of period	283,308		61.25

The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock on the grant date, are being expensed on a straight-line basis for service awards over the vesting period of the restricted stock, which ranges from three to four years.

The expense recorded for the three months ended September 30, 2015 and 2014 related to grants of restricted stock was approximately $0.7 million and $0.4 million, respectively, and approximately $1.8 million and $1.9 million for the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.6 million and $0.4 million for the three months ended September 30, 2015 and 2014, respectively, and approximately $2.1 million and $2.0 million for the nine months ended September 30, 2015 and 2014, respectively. Unearned compensation representing the unvested portion of the restricted stock totaled $11.9 million and $10.4 million as of September 30, 2015 and December 31, 2014, respectively. We expect to recognize this unearned compensation over the next 2.6 years on a weighted-average basis.

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Incentive Plan (Tables)

9 Months Ended

Sep. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary Of Long-Term Incentive Unit Activity

Below is a summary of our long-term incentive unit activity for the nine months ended September 30, 2015.

Unvested Long-term Incentive Units	Units		Weighted-Average Grant Date Fair Value
Unvested, beginning of period	314,415		$	59.34
Granted	90,679		64.79
Vested	(157,300	)	60.25
Cancelled or expired	(22,496	)	58.13
Unvested, end of period	225,298		61.03

Market Performance Based Awards

In the event that the RMS Relative Market Performance during the Market Performance Period is achieved at the “threshold,” “target” or “high” level as set forth below, the awards will become vested as to the market condition with respect to the percentage of Class D units or RSUs, as applicable, set forth below:

Level	RMS Relative Market Performance (2014 Awards)	RMS Relative Market Performance (2015 Awards)	Market Performance Vesting Percentage
Below Threshold Level	< 0 basis points	< -300 basis points	0	%
Threshold Level	0 basis points	-300 basis points	25	%
Target Level	325 basis points	100 basis points	50	%
High Level	> 650 basis points	> 500 basis points	100	%

Summary Of Incentive Award Plan's Stock Option

The following table summarizes the Amended and Restated 2004 Incentive Award Plan’s stock option activity for the nine-month period ended September 30, 2015:

	Period Ended September 30, 2015
	Shares		Weighted average exercise price
Options outstanding, beginning of period	80,933		$	37.25
Exercised	(26,961	)	29.61
Options outstanding, end of period	53,972		$	41.07
Exercisable, end of period	53,972		$	41.07

Summary Of Stock Options Outstanding And Exercisable

The following table summarizes information about stock options outstanding and exercisable as of September 30, 2015:

Options outstanding and exercisable
Exercise price	Number outstanding	Weighted-average remaining contractual  life (years)	Weighted-average exercise price		Aggregate intrinsic value
$33.18	4,175	1.09	33.18		$	134,185
$41.73	49,797	1.59	41.73		1,174,711
Total / Weighted-average	53,972	1.55	$	41.07	$	1,308,896

Summary Of Restricted Stock Activity

Below is a summary of our restricted stock activity for the nine months ended September 30, 2015.

Unvested Restricted Stock	Shares		Weighted-Average Grant Date Fair Value
Unvested, beginning of period	302,298		$	57.10
Granted	105,165		66.65
Vested	(90,871	)	59.48
Cancelled or expired	(33,284	)	57.16
Unvested, end of period	283,308		61.25

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Fair Value Of Instruments

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Of Instruments

Fair Value of Instruments

We disclose fair value information about all financial instruments, whether or not recognized in the condensed consolidated balance sheets, for which it is practicable to estimate fair value. Current accounting guidance requires the Company to disclose fair value information about all financial instruments, whether or not recognized in the balance sheets, for which it is practicable to estimate fair value.

The Company’s disclosures of estimated fair value of financial instruments at September 30, 2015 and December 31, 2014 were determined using available market information and appropriate valuation methods. Considerable judgment is necessary to interpret market data and develop estimated fair value. The use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts.

The carrying amounts for cash and cash equivalents, restricted cash, accounts and other receivables, accounts payable and other accrued liabilities, accrued dividends and distributions, security deposits and prepaid rents approximate fair value because of the short-term nature of these instruments. As described in Note 14 "Derivative Instruments", the interest rate swaps are recorded at fair value.

We calculate the fair value of our mortgage loans, unsecured term loan, unsecured senior notes and exchangeable senior debentures based on currently available market rates assuming the loans are outstanding through maturity and considering the collateral and other loan terms. In determining the current market rate for fixed rate debt, a market spread is added to the quoted yields on federal government treasury securities with similar maturity dates to our debt. The carrying value of our global revolving credit facility approximates fair value, due to the variability of interest rates.

As of September 30, 2015 and December 31, 2014, the aggregate estimated fair value and carrying value of our global revolving credit facility, unsecured term loan, unsecured senior notes and mortgage loans were as follows (in thousands):

	Categorization under the fair value hierarchy	As of September 30, 2015				As of December 31, 2014
		Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value
Global revolving credit facility (1)	Level 2	$	688,957	$	688,957	$	525,951	$	525,951
Unsecured term loan (2)	Level 2	938,276		938,276		976,600		976,600
Unsecured senior notes (3)(4)	Level 2	2,963,204		2,816,359		2,968,073		2,791,758
Mortgage loans (3)	Level 2	319,222		304,987		399,569		378,818
		$	4,909,659	$	4,748,579	$	4,870,193	$	4,673,127

(1) The carrying value of our global revolving credit facility approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings.

(2) The carrying value of our unsecured term loan approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings.

(3) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2020 Notes, 2021 Notes, 3.950% 2022 Notes, 3.625% 2022 Notes, 2023 Notes and 2025 Notes are valued based on quoted market prices.

(4) The carrying value of the 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 2023 Notes and 2025 Notes are net of discount of $17,601 and $15,632 in the aggregate as of September 30, 2015 and December 31, 2014, respectively.

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Equity And Accumulated Other Comprehensive Income, Net (Schedule Of Accumulated Other Comprehensive Loss, Net) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	$ (45,046)
Net current period change	(44,978)
Reclassification to interest expense from interest rate swaps	2,036
Balance as of September 30, 2015	(87,988)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	(39,567)
Net current period change	(40,688)
Reclassification to interest expense from interest rate swaps	0
Balance as of September 30, 2015	(80,255)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	(5,479)
Net current period change	(4,290)
Reclassification to interest expense from interest rate swaps	2,036
Balance as of September 30, 2015	$ (7,733)

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Consolidated Statement Of Capital - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Balance (units)		135,626,255
Conversion of limited partner common units to general partner common units		$ 1,364
Amortization of share-based compensation		12,450
Net income	$ 57,842	318,164
Other comprehensive income—foreign currency translation adjustments	(19,105)	(41,480)
Other comprehensive loss—fair value of interest rate swaps	(2,534)	(4,374)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense	$ 574	$ 2,077
Balance (units)	135,843,684	135,843,684
Digital Realty Trust, L.P.
Balance as of December 31, 2014		$ 3,914,238
Common stock offering costs, net		1,498
Issuance of common units in connection with the exercise of stock options		798
Amortization of share-based compensation		12,450
Distributions		(409,031)
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions		(372)
Net income	$ 56,689	317,011
Other comprehensive income—foreign currency translation adjustments	(19,105)	(41,480)
Other comprehensive loss—fair value of interest rate swaps	(2,534)	(4,374)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense	574	2,077
Balance as of September 30, 2015	3,792,815	3,792,815
Accumulated Other Comprehensive Loss, Net | Digital Realty Trust, L.P.
Balance as of December 31, 2014		(48,433)
Other comprehensive income—foreign currency translation adjustments		(41,480)
Other comprehensive loss—fair value of interest rate swaps		(4,374)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense		2,077
Balance as of September 30, 2015	(92,210)	(92,210)
Noncontrolling Interests in Consolidated Joint Ventures | Digital Realty Trust, L.P.
Balance as of December 31, 2014		6,791
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions		(372)
Net income		342
Balance as of September 30, 2015	6,761	6,761
General Partner | Preferred Units | Digital Realty Trust, L.P.
Balance as of December 31, 2014		$ 1,048,121
Balance (units)		43,400,000
Distributions		$ (55,367)
Net income		55,367
Balance as of September 30, 2015	$ 1,048,121	$ 1,048,121
Balance (units)	43,400,000	43,400,000
General Partner | Common Units | Digital Realty Trust, L.P.
Balance as of December 31, 2014		$ 2,875,181
Balance (units)		135,626,255
Conversion of limited partner common units to general partner common units		$ 1,364
Conversion of limited partner common units to general partner common units (units)		118,587
Issuance of unvested restricted common units, net of forfeitures (units)		71,881
Common stock offering costs, net		$ 1,498
Issuance of common units in connection with the exercise of stock options		$ 798
Issuance of common units in connection with the exercise of stock options (units)		26,961
Amortization of share-based compensation		$ 12,450
Reclassification of vested share-based awards		(8,602)
Distributions		(346,331)
Net income		256,152
Balance as of September 30, 2015	$ 2,792,510	$ 2,792,510
Balance (units)	135,843,684	135,843,684
Limited Partners | Common Units | Digital Realty Trust, L.P.
Balance as of December 31, 2014		$ 32,578
Balance (units)		3,013,661
Conversion of limited partner common units to general partner common units		$ (1,364)
Conversion of limited partner common units to general partner common units (units)		(118,587)
Issuance of common units, net of forfeitures (units)		(59,461)
Reclassification of vested share-based awards		$ 8,602
Distributions		(7,333)
Net income		5,150
Balance as of September 30, 2015	$ 37,633	$ 37,633
Balance (units)	2,835,613	2,835,613

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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Accounts and other receivables, net of allowance for doubtful accounts	$ 7,041,000	$ 6,302,000
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, authorized	70,000,000	70,000,000
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, authorized	215,000,000	215,000,000
Common Stock, Shares, Issued	135,843,684	135,626,255
Common Stock, Shares, Outstanding	135,843,684	135,626,255
Series E Preferred Units
Preferred Stock, dividend rate	7.00%	7.00%
Preferred Stock, liquidation preference value	$ 287,500,000	$ 287,500,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, issued (shares)	11,500,000	11,500,000
Preferred Stock, outstanding	11,500,000	11,500,000
Series F Preferred Units
Preferred Stock, dividend rate	6.625%	6.625%
Preferred Stock, liquidation preference value	$ 182,500,000	$ 182,500,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, issued (shares)	7,300,000	7,300,000
Preferred Stock, outstanding	7,300,000	7,300,000
Series G Preferred Units
Preferred Stock, dividend rate	5.875%	5.875%
Preferred Stock, liquidation preference value	$ 250,000,000	$ 250,000,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, issued (shares)	10,000,000	10,000,000
Preferred Stock, outstanding	10,000,000	10,000,000
Series H Preferred Units
Preferred Stock, dividend rate	7.375%	7.375%
Preferred Stock, liquidation preference value	$ 365,000,000	$ 365,000,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, issued (shares)	14,600,000	14,600,000
Preferred Stock, outstanding	14,600,000	14,600,000
Series I Preferred Stock
Preferred Stock, dividend rate	6.35%
Preferred Stock, liquidation preference value	$ 250,000,000	$ 0
Preferred Stock, liquidation preference per share/unit	$ 25.00	$ 0.00
Preferred stock, issued (shares)	10,000,000	0
Preferred Stock, outstanding	10,000,000	0
Digital Realty Trust, L.P.
Accounts and other receivables, net of allowance for doubtful accounts	$ 7,041,000	$ 6,302,000
Common Units, issued	135,843,684	135,626,255
Common Units, outstanding	135,843,684	135,626,255
Limited Partners, common units	1,421,314	1,463,814
Limited Partners, profits interest units	1,035,062	1,170,610
Limited Partners, Class C units outstanding	379,237	379,237
Digital Realty Trust, L.P. | Series E Preferred Units
Preferred Stock, dividend rate	7.00%	7.00%
Preferred Stock, liquidation preference value	$ 287,500,000	$ 287,500,000
Preferred Stock, liquidation preference per share/unit	$ 25.00	$ 25.00
Preferred Units, issued	11,500,000	11,500,000
Preferred Units, outstanding	11,500,000	11,500,000
Digital Realty Trust, L.P. | Series F Preferred Units
Preferred Stock, dividend rate	6.625%	6.625%
Preferred Stock, liquidation preference value	$ 182,500,000	$ 182,500,000
Preferred Stock, liquidation preference per share/unit	$ 25.00	$ 25.00
Preferred Units, issued	7,300,000	7,300,000
Preferred Units, outstanding	7,300,000	7,300,000
Digital Realty Trust, L.P. | Series G Preferred Units
Preferred Stock, dividend rate	5.875%	5.875%
Preferred Stock, liquidation preference value	$ 250,000,000	$ 250,000,000
Preferred Stock, liquidation preference per share/unit	$ 25.00	$ 25.00
Preferred Units, issued	10,000,000	10,000,000
Preferred Units, outstanding	10,000,000	10,000,000
Digital Realty Trust, L.P. | Series H Preferred Units
Preferred Stock, dividend rate	7.375%	7.375%
Preferred Stock, liquidation preference value	$ 365,000,000	$ 365,000,000
Preferred Stock, liquidation preference per share/unit	$ 25.00	$ 25.00
Preferred Units, issued	14,600,000	14,600,000
Preferred Units, outstanding	14,600,000	14,600,000

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Income per Share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Income per Share

Income per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income available to common stockholders	$	38,522	$	109,314	$	257,305	$	185,010
Weighted average shares outstanding—basic	135,832,503		135,492,618		135,782,831		132,635,894
Potentially dilutive common shares:
Stock options	19,983		52,629		20,629		46,649
Unvested incentive units	86,190		129,024		65,752		61,122
Series I Cumulative Redeemable Preferred Stock	1,703,182		—		567,727		—
Market performance-based awards	618,078		272,262		483,538		109,301
Weighted average shares outstanding—diluted	138,259,936		135,946,533		136,920,477		132,852,966
Income per share:
Basic	$	0.28	$	0.81	$	1.89	$	1.39
Diluted	$	0.28	$	0.80	$	1.88	$	1.39

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,635,444	2,815,512	2,698,215	2,745,730
Potentially dilutive 2029 Debentures	—	—	—	2,617,790
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	4,567,661	4,673,322	4,440,429	5,136,112
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	2,896,800	2,963,810	2,816,110	3,257,310
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	3,960,900	4,052,525	3,850,569	4,453,839
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	5,804,286	5,938,553	5,642,608	4,111,306
Shares subject to Forward Equity Offering	10,500,000	—	10,500,000	—
	30,365,091	20,443,722	29,947,931	22,322,087

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Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 30, 2015
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Registrant Name	Digital Realty Trust, Inc.
Entity Central Index Key	0001297996
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		146,343,684
Digital Realty Trust, L.P.
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Registrant Name	Digital Realty Trust, L.P.
Entity Central Index Key	0001494877
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer

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Income per Unit

9 Months Ended

Sep. 30, 2015

Digital Realty Trust, L.P.

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

Income per Unit

Income per Unit

The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income available to common unitholders	$	38,116	$	111,586	$	261,302	$	188,848
Weighted average units outstanding—basic	138,467,947		138,308,130		138,481,046		135,381,624
Potentially dilutive common units:
Stock options	19,983		52,629		20,629		46,649
Unvested incentive units	86,190		129,024		65,752		61,122
Market performance-based awards	618,078		272,262		483,538		109,301
Weighted average units outstanding—diluted	139,192,198		138,762,045		139,050,965		135,598,696
Income per unit:
Basic	$	0.28	$	0.81	$	1.89	$	1.39
Diluted	$	0.27	$	0.80	$	1.88	$	1.39

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Potentially dilutive 2029 Debentures	—	1,121,910	—	3,948,379
Potentially dilutive Series E Cumulative Redeemable Preferred Units	4,567,661	5,060,744	4,440,429	5,367,507
Potentially dilutive Series F Cumulative Redeemable Preferred Units	2,896,800	3,209,512	2,816,110	3,404,060
Potentially dilutive Series G Cumulative Redeemable Preferred Units	3,960,900	4,388,483	3,850,569	4,654,496
Potentially dilutive Series H Cumulative Redeemable Preferred Units	5,804,286	6,437,332	5,642,608	3,449,841
Units subject to Forward Equity Offering	10,500,000	—	10,500,000	—
	27,729,647	20,217,981	27,249,716	20,824,283

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Incentive Plan (Summary Of Restricted Stock Activity) (Details) - Restricted Stock	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested Shares, beginning of period, Shares	302,298
Unvested Shares, Granted, Shares	105,165
Unvested Shares, Vested, Shares	(90,871)
Unvested Shares, Cancelled or expired, Shares	(33,284)
Unvested Shares, end of period, Shares	283,308
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	$ 57.10
Unvested Shares, Granted, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	66.65
Unvested Shares, Vested, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	59.48
Unvested Shares, Cancelled or expired, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	57.16
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	$ 61.25

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Condensed Consolidated Income Statements - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating Revenues:
Rental	$ 338,330	$ 317,064	$ 988,172	$ 936,270
Tenant reimbursements	95,484	92,209	268,885	261,517
Fee income	1,595	2,748	4,758	5,397
Other	580	165	1,078	1,038
Total operating revenues	435,989	412,186	1,262,893	1,204,222
Operating Expenses:
Rental property operating and maintenance	140,538	130,894	394,640	375,586
Property taxes	19,953	25,765	64,116	68,485
Insurance	2,140	2,145	6,449	6,463
Change in fair value of contingent consideration	(1,594)	(1,465)	(44,276)	(4,102)
Depreciation and amortization	136,974	137,474	397,571	405,186
General and administrative	22,755	20,709	69,562	71,708
Transactions	11,042	144	14,301	980
Impairment of investments in real estate	0	12,500	0	12,500
Other	51	1,648	29	2,584
Total operating expenses	331,859	329,814	902,392	939,390
Operating income	104,130	82,372	360,501	264,832
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	4,169	3,455	12,170	9,513
Gain (loss) on sale of properties	(207)	0	94,282	15,945
Gain on contribution of properties to unconsolidated joint ventures	0	93,498	0	95,404
Interest and other income (expense)	(358)	378	(2,879)	2,022
Interest expense	(48,138)	(48,169)	(139,718)	(144,689)
Tax expense	(1,754)	(1,178)	(6,044)	(4,037)
Loss from early extinguishment of debt	0	(195)	(148)	(780)
Net income	57,842	130,161	318,164	238,210
Net income attributable to noncontrolling interests	(864)	(2,392)	(5,492)	(4,190)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	56,978	127,769	312,672	234,020
Preferred stock/unit dividends/distributions	(18,456)	(18,455)	(55,367)	(49,010)
Net income available to common stock/unitholders	$ 38,522	$ 109,314	$ 257,305	$ 185,010
Net income per share/unit available to common stockholders/unitholders:
Basic ($ per share/unit)	$ 0.28	$ 0.81	$ 1.89	$ 1.39
Diluted ($ per share/unit)	$ 0.28	$ 0.80	$ 1.88	$ 1.39
Weighted average common shares/units outstanding:
Weighted average shares/units outstanding-basic (shares)	135,832,503	135,492,618	135,782,831	132,635,894
Weighted average shares/units outstanding-diluted (shares)	138,259,936	135,946,533	136,920,477	132,852,966
Digital Realty Trust, L.P.
Operating Revenues:
Rental	$ 338,330	$ 317,064	$ 988,172	$ 936,270
Tenant reimbursements	95,484	92,209	268,885	261,517
Fee income	1,595	2,748	4,758	5,397
Other	580	165	1,078	1,038
Total operating revenues	435,989	412,186	1,262,893	1,204,222
Operating Expenses:
Rental property operating and maintenance	140,538	130,894	394,640	375,586
Property taxes	19,953	25,765	64,116	68,485
Insurance	2,140	2,145	6,449	6,463
Change in fair value of contingent consideration	(1,594)	(1,465)	(44,276)	(4,102)
Depreciation and amortization	136,974	137,474	397,571	405,186
General and administrative	22,755	20,709	69,562	71,708
Transactions	11,042	144	14,301	980
Impairment of investments in real estate	0	12,500	0	12,500
Other	51	1,648	29	2,584
Total operating expenses	331,859	329,814	902,392	939,390
Operating income	104,130	82,372	360,501	264,832
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	4,169	3,455	12,170	9,513
Gain (loss) on sale of properties	(207)	0	94,282	15,945
Gain on contribution of properties to unconsolidated joint ventures	0	93,498	0	95,404
Interest and other income (expense)	(358)	378	(2,879)	2,022
Interest expense	(49,291)	(48,169)	(140,871)	(144,689)
Tax expense	(1,754)	(1,178)	(6,044)	(4,037)
Loss from early extinguishment of debt	0	(195)	(148)	(780)
Net income	56,689	130,161	317,011	238,210
Net income attributable to noncontrolling interests	(117)	(120)	(342)	(352)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	56,572	130,041	316,669	237,858
Preferred stock/unit dividends/distributions	(18,456)	(18,455)	(55,367)	(49,010)
Net income available to common stock/unitholders	$ 38,116	$ 111,586	$ 261,302	$ 188,848
Net income per share/unit available to common stockholders/unitholders:
Basic ($ per share/unit)	$ 0.28	$ 0.81	$ 1.89	$ 1.39
Diluted ($ per share/unit)	$ 0.27	$ 0.80	$ 1.88	$ 1.39
Weighted average common shares/units outstanding:
Weighted average shares/units outstanding-basic (shares)	138,467,947	138,308,130	138,481,046	135,381,624
Weighted average shares/units outstanding-diluted (shares)	139,192,198	138,762,045	139,050,965	135,598,696

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Investments In Real Estate

9 Months Ended

Sep. 30, 2015

Business Combinations [Abstract]

Investments In Real Estate

Investments in Real Estate

We acquired the following real estate properties during the nine months ended September 30, 2015:

Location	Metropolitan Area	Date Acquired	Amount (in millions) (1)
Deer Park 3 (2)	Melbourne	April 15, 2015	$	1.6
3 Loyang Way (3)(4)	Singapore	June 25, 2015	45.0
			$	46.6

(1) Purchase price in U.S. dollars and excludes capitalized closing costs on land acquisitions. Purchase prices for acquisitions outside the United States are based on the exchange rate at the date of acquisition.

(2) Represents currently vacant land which is not included in our operating property count.

(3) Represents a development property with an existing shell, which is included in our operating property count. This acquisition lacked key inputs to qualify as a business combination under purchase accounting guidance, and has therefore been accounted for as an asset acquisition, not a business combination.

(4) Property is subject to a ground lease, which expires in February 2024, with a renewal provision of an additional 28 years upon satisfaction of certain requirements.

Dispositions

We sold the following real estate properties during the nine months ended September 30, 2015:

Location	Metropolitan Area	Date Sold	Gross Proceeds (in millions)			Gain on Sale (in millions)
100 Quannapowitt Parkway	Boston	February 5, 2015	$	31.1		$	10.1
3300 East Birch Street	Los Angeles	March 31, 2015	14.2			7.5
833 Chestnut Street	Philadelphia	April 30, 2015	160.8		(1)	76.7
			$	206.1		$	94.3

(1) Gross proceeds includes a $9.0 million note receivable, which is expected to be collected by year-end.

We have identified certain non-core investment properties we intend to sell as part of our capital recycling strategy. Our capital recycling program is designed to identify non-strategic and underperforming assets that can be sold to generate proceeds that will support the funding of our core investment activity. We expect our capital recycling initiative will likewise have a meaningfully positive impact on overall return on invested capital. In addition, our capital recycling program does not represent a strategic shift, as we are not entirely exiting regions or property types. During this process, we are evaluating the carrying value of certain investment properties identified for potential sale to ensure the carrying value is recoverable in light of a potentially shorter holding period. As a result of our evaluation, during the year ended December 31, 2014, we recognized approximately $126.5 million of impairment losses on five properties located in the Central, East and West regions. The fair value of the five properties were primarily based on discounted cash flow analysis, and in certain cases, we supplemented the analysis by obtaining broker opinions of value. As of September 30, 2015, three of these five properties met the criteria to be classified as held for sale.

As of September 30, 2015, the Company had taken the necessary actions to conclude that an additional five properties (in addition to the three properties referenced above) to be disposed of as part of our capital recycling strategy met the criteria to be classified as held for sale. As of September 30, 2015, these eight properties had an aggregate carrying value of $173.5 million within total assets and $6.9 million within total liabilities and are shown as assets held for sale and obligations associated with assets held for sale on the condensed consolidated balance sheet. The eight properties are not representative of a significant component of our portfolio, nor do the potential sales represent a significant shift in our strategy.

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Summary Of Significant Accounting Policies

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

(a) Principles of Consolidation and Basis of Presentation

The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated.

The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014.

The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits:

• enhancing investors’ understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

• creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes.

There are a few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how we operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership and a $242.7 million intercompany loan, which was repaid subsequent to the period covered by this report. As a result, Digital Realty Trust, Inc. generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public securities from time to time and guaranteeing certain unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates. Digital Realty Trust, Inc. itself has not issued any indebtedness but guarantees the unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates, as disclosed in these notes.

The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company’s joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units or loaned to Digital Realty Trust, L.P. on a temporary basis prior to contribution in exchange for partnership units, the Operating Partnership generally generates the capital required by the Company’s business primarily through the Operating Partnership’s operations, by the Operating Partnership’s or its affiliates’ direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholders’ equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners’ capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner’s capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels.

To help investors understand the significant differences between the Company and the Operating Partnership, these consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership:

• condensed consolidated face financial statements; and

• the following notes to the condensed consolidated financial statements:

• "Debt of the Company" and "Debt of the Operating Partnership";

• "Income per Share" and "Income per Unit"; and

• "Equity and Accumulated Other Comprehensive Income, Net" and "Capital and Accumulated Other Comprehensive Income".

In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company generally operates the business through the Operating Partnership.

(b) Cash Equivalents

For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of September 30, 2015, cash equivalents consist of investments in money market instruments.

(c) Investment in Unconsolidated Joint Ventures

The Company’s investment in unconsolidated joint ventures is accounted for using the equity method, whereby the investment is increased for capital contributed and our share of the joint ventures’ net income and decreased by distributions we receive and our share of any losses of the joint ventures.

We amortize the difference between the cost of our investments in unconsolidated joint ventures and the book value of the underlying equity into equity in earnings from unconsolidated affiliates on a straight-line basis consistent with the lives of the underlying assets.

(d) Capitalization of Costs

Direct and indirect project costs that are clearly associated with the development of properties are capitalized as incurred. Project costs include all costs directly associated with the development of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development are not capitalized and are charged to expense as incurred.

Capitalization of costs begins when the activities necessary to get the development project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development project is substantially complete and ready for its intended use. Determining when a development project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development project to be substantially complete and ready for its intended use upon receipt of a certificate of occupancy. If and when development of a property is suspended pursuant to a formal change in the planned use of the property, we will evaluate whether the accumulated costs exceed the estimated value of the project and write off the amount of any such excess accumulated costs. For a development project that is suspended for reasons other than a formal change in the planned use of such property, the accumulated project costs are evaluated for impairment consistent with our impairment policies for long-lived assets. Capitalized costs are allocated to the specific components of a project that are benefited.

We capitalized interest of approximately $2.4 million and $5.4 million during the three months ended September 30, 2015 and 2014, respectively, and $9.9 million and $15.6 million during the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation and other overhead expense of employees direct and incremental to construction and successful leasing activities of approximately $18.2 million and $14.4 million, during the three months ended September 30, 2015 and 2014, respectively, and $46.6 million and $42.3 million during the nine months ended September 30, 2015 and 2014, respectively. Capitalized leasing costs of approximately $37.8 million and $37.1 million are included in improvements to investments in real estate in cash flows from investing activities in the condensed consolidated statements of cash flows for the nine months ended September 30, 2015 and 2014, respectively.

(e) Share-Based Compensation

The Company measures all share-based compensation awards at fair value on the date they are granted to employees and directors, and recognizes compensation cost, net of forfeitures, over the requisite service period for awards with only a service condition. The estimated fair value of the long-term incentive units and Class D Units (discussed in Note 13 "Incentive Plan") granted by us is being amortized on a straight-line basis over the expected service period.

The fair value of share-based compensation awards that contain a market condition is measured using a Monte Carlo simulation method and not adjusted based on actual achievement of the performance goals.

(f) Income Taxes

Digital Realty Trust, Inc. has elected to be treated as a real estate investment trust (a “REIT”) for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. generally is not required to pay federal corporate income tax to the extent taxable income is currently distributed to its stockholders. If Digital Realty Trust, Inc. fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.

The Company is subject to foreign, state and local income taxes in the jurisdictions in which it conducts business. The Company’s U.S. consolidated taxable REIT subsidiaries are subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes current and deferred income taxes for its taxable REIT subsidiaries, certain states and non-U.S. jurisdictions, as appropriate.

We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered “more-likely-than-not” to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of September 30, 2015 and December 31, 2014, we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated income statements. For the three and nine months ended September 30, 2015 and 2014, we had no such interest or penalties. The tax year 2012 and thereafter remain open to examination by the major taxing jurisdictions with which the Company files tax returns.

See Note 10 "Income Taxes" for further discussion on income taxes.

(g) Presentation of Transactional-based Taxes

We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis.

(h) Fee Income

Occasionally, customers engage the company for certain services. The nature of these services historically involves property management, construction management, and assistance with financing. The proper revenue recognition of these services can be different, depending on whether the arrangements are service revenue or contractor type revenue.

Service revenues are typically recognized on an equal monthly basis based on the minimum fee to be earned. The monthly amounts could be adjusted depending on if certain performance milestones are met.

Fee income also includes management fees. These fees arise from contractual agreements with entities in which we have a noncontrolling interest. The management fees are recognized as earned under the respective agreements. Management and other fee income related to partially owned entities are recognized to the extent attributable to the unaffiliated interest.

(i) Assets and Liabilities Measured at Fair Value

Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the lowest level input that is significant would be used to determine the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

(j) Transactions Expense

Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and significant transactions.

(k) Gains on Sale of Properties

Gains on sale of properties are recognized using the full accrual or partial sale methods, as applicable, in accordance with U.S. GAAP, provided various criteria relating to the terms of sale and any subsequent involvement with the real estate sold are satisfied.

(l) Management’s Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to the valuation of our real estate properties, contingent consideration, accounts receivable and deferred rent receivable, performance-based equity compensation plans, the completeness of accrued liabilities and Digital Realty Trust, Inc.’s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions.

(m) Segment and Geographic Information

All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of real estate services provided to them are standardized throughout the portfolio. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment.

Operating revenues from properties in the United States were $334.5 million and $314.9 million and outside the United States were $101.4 million and $97.3 million for the three months ended September 30, 2015 and 2014, respectively. Operating revenues from properties in the United States were $971.6 million and $915.7 million and outside the United States were $291.3 million and $288.6 million for the nine months ended September 30, 2015 and 2014, respectively. We had long-lived assets located in the United States of $5.4 billion and $5.4 billion and outside the United States of $2.6 billion and $2.7 billion as of September 30, 2015 and December 31, 2014, respectively.

Operating revenues from properties located in the United Kingdom were $55.2 million and $55.1 million, or 12.7% and 13.4% of total operating revenues, for the three months ended September 30, 2015 and 2014, respectively. Operating revenues from properties located in the United Kingdom were $160.1 million and $164.5 million, or 12.7% and 13.7% of total operating revenues, for the nine months ended September 30, 2015 and 2014, respectively. No other foreign country comprised more than 10% of total operating revenues for each of these periods. We had long-lived assets located in the United Kingdom of $1.7 billion and $1.7 billion, or 20.9% and 21.3% of total long-lived assets, as of September 30, 2015 and December 31, 2014, respectively. No other foreign country comprised more than 10% of total long-lived assets as of September 30, 2015 and December 31, 2014.

(n) Reclassifications

Certain reclassifications of prior year amounts have been made to conform to the current year presentation. During the three and nine months ended September 30, 2014, $0.1 million and $0.3 million, respectively, were reclassified from rental property operating and maintenance expense to other expense. Additionally, as of December 31, 2014, $6.5 million was reclassified from cash and cash equivalents to restricted cash to correct an immaterial classification error related to certain bank accounts for which certain mortgage lenders have disbursement approval rights.

(o) Recent Accounting Pronouncements

In February 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which provides guidance on the consolidation evaluation for reporting organizations that are required to evaluate whether they should consolidate certain legal entities. In accordance with the guidance, all legal entities are subject to reevaluation under the revised consolidation model. The guidance is effective in the first quarter of 2016, and early adoption is permitted. We are currently evaluating the potential impact of the adoption of ASU 2015-02 on our consolidated financial statements.

On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however, if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. We are currently assessing the impact of the guidance on our consolidated financial statements.

On April 17, 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the associated debt liability.  Currently, debt issuance costs are recorded as an asset and amortization of these deferred financing costs is recorded in interest expense.  Under the new standard, debt issuance costs will continue to be amortized over the life of the debt instrument and amortization will continue to be recorded in interest expense.  The new standard is effective for the Company on January 1, 2016 and will be applied on a retrospective basis.  The Company is currently evaluating ASU 2015-03, and anticipates a change in our presentation only since the standard does not alter the accounting for debt issuance costs.

In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement Period Adjustments (Topic 805). ASU 2015-16 requires an acquirer in a business combination to recognize provisional amounts when measurements were incomplete as of the end of a reporting period as an adjustment in the reporting period in which the provisional amount is determined. Prior to this standard, the acquirer was required to adjust such provisional amounts by restating prior period financial statements. ASU 2015-16 is effective for the annual period ending December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The Company elected to early adopt this standard effective with the interim period beginning July 1, 2015 and this standard did not have a material effect on the consolidated financial statements.

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Derivative Instruments

9 Months Ended

Sep. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

Currently, we use interest rate swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.

To comply with the provisions of fair value accounting guidance, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, as of September 30, 2015, we have assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and have determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. We do not have any fair value measurements on a recurring basis using significant unobservable inputs (Level 3) as of September 30, 2015 or December 31, 2014.

As of September 30, 2015 and December 31, 2014, we had the following outstanding interest rate derivatives that were designated as effective cash flow hedges of interest rate risk (in thousands):

Notional Amount										Fair Value at Significant Other Observable Inputs (Level 2)
As of September 30, 2015			As of December 31, 2014			Type of Derivative	Strike Rate	Effective Date	Expiration Date	As of September 30, 2015			As of December 31, 2014
Currently-paying contracts
$	335,905	(1)	$	410,905	(1)	Swap	0.717	Various	Various	$	(1,502	)	$	(241	)
133,237		(2)	142,965		(2)	Swap	0.925	July 17, 2012	April 18, 2017	1,435			669
469,142			553,870							(67		)	428
Forward-starting contracts
—		(3)	150,000			Forward-starting Swap	2.091	July 15, 2014	July 15, 2019	—			(2,837		)
Total
$	469,142		$	703,870						$	(67	)	$	(2,409	)

(1) Represents the U.S. dollar tranche of the unsecured term loan.

(2) Represents a portion of the Singapore dollar tranche of the unsecured term loan. Translation to U.S. dollars is based on exchange rate of $0.70 to 1.00 SGD as of September 30, 2015 and $0.75 to 1.00 SGD as of December 31, 2014.

(3) In January 2014, we entered into a forward-starting five-year swap contract to protect against adverse fluctuations in interest rates by reducing our exposure to variability in cash flows relating to interest payments on a forecasted issuance of debt. The accrual period of the swap contract was designed to match the tenor of the planned debt issuance. In the fourth quarter of 2014, changes in the forecasted transaction resulted in the discontinuation of cash flow hedge accounting. As such, changes in the fair value of the forward starting swap were recognized in earnings, within the other income (expense) line item. During the three months ended March 31, 2015, the total net loss recognized on the forward starting swap was approximately $1.6 million, and on January 13, 2015, we cash settled the forward starting swap for approximately $5.7 million, including accrued interest.

As of September 30, 2015, we estimate that an additional $1.9 million will be reclassified as an increase to interest expense during the twelve months ended September 30, 2016, when the hedged forecasted transactions impact earnings.

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Income Taxes

9 Months Ended

Sep. 30, 2015

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Digital Realty Trust, Inc. has elected to be treated and believes that it has been organized and has operated in a manner that has enabled it to qualify as a REIT for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. is generally not subject to corporate level federal income taxes on earnings distributed currently to its stockholders. Since inception, Digital Realty Trust, Inc. has distributed at least 100% of its taxable income annually and intends to do so for the tax year ending December 31, 2015. As such, no provision for federal income taxes has been included in the accompanying condensed consolidated financial statements for the three and nine months ended September 30, 2015 and 2014.

The Operating Partnership is a partnership and is not required to pay federal income tax. Instead, taxable income is allocated to its partners, who include such amounts on their federal income tax returns. As such, no provision for federal income taxes has been included in the Operating Partnership’s accompanying condensed consolidated financial statements.

We have elected taxable REIT subsidiary (“TRS”) status for some of our consolidated subsidiaries. In general, a TRS may provide services that would otherwise be considered impermissible for REITs to provide and may hold assets that REITs cannot hold directly. Income taxes for TRS entities were accrued, as necessary, for the three and nine months ended September 30, 2015 and 2014.

For our TRS entities and foreign subsidiaries that are subject to U.S. federal, state and foreign income taxes, deferred tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted tax rates expected to be in effect when the temporary differences reverse. A valuation allowance for deferred tax assets is provided if we believe it is more likely than not that the deferred tax asset may not be realized, based on available evidence at the time the determination is made. An increase or decrease in the valuation allowance that results from the change in circumstances that causes a change in our judgment about the realizability of the related deferred tax asset is included in the income statement. Deferred tax assets (net of valuation allowance) and liabilities for our TRS entities and foreign subsidiaries were accrued, as necessary, for the three and nine months ended September 30, 2015 and 2014. As of September 30, 2015, we had deferred tax liabilities, net of deferred tax assets, of approximately $135.4 million primarily related to our foreign properties. The majority of our net deferred tax liability relates to differences between tax basis and book basis of the assets acquired in the Sentrum Portfolio acquisition during 2012.

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Subsequent Events (Details) - USD ($)						9 Months Ended
	Oct. 13, 2015	Oct. 09, 2015	Oct. 08, 2015	Aug. 24, 2015	Jul. 20, 2015	Sep. 30, 2015	Oct. 05, 2015	Oct. 01, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Payments to acquire business						$ 46,600,000
Preferred Stock, par value						$ 0.01			$ 0.01
Series I Preferred Stock
Subsequent Event [Line Items]
Issued (shares)				10,000,000
Preferred Stock, dividend rate				6.35%		6.35%
Preferred Stock, liquidation preference per share/unit				$ 25.00		$ 25.00			$ 0.00
Common Stock
Subsequent Event [Line Items]
Issued (shares)					10,500,000
Senior Notes: | 3.400% Notes Due 2020
Subsequent Event [Line Items]
Stated interest rate						3.40%
Senior Notes: | 4.750% Notes Due 2025
Subsequent Event [Line Items]
Stated interest rate						4.75%
Telx | Series I Preferred Stock
Subsequent Event [Line Items]
Issued (shares)				10,000,000
Preferred Stock, dividend rate				6.35%
Preferred Stock, par value				$ 0.01
Preferred Stock, liquidation preference per share/unit				$ 25.00
Subsequent Event
Subsequent Event [Line Items]
Proceeds from common stock issuance			$ 674,100,000
Subsequent Event | Senior Notes: | 3.400% Notes Due 2020
Subsequent Event [Line Items]
Face amount							$ 500,000,000.0
Stated interest rate							3.40%
Subsequent Event | Senior Notes: | 4.750% Notes Due 2025
Subsequent Event [Line Items]
Face amount							$ 450,000,000.0
Stated interest rate							4.75%
Subsequent Event | Telx
Subsequent Event [Line Items]
Payments to acquire business		$ 1,886,000,000
Proceeds from common stock issuance			$ 674,100,000
Subsequent Event | Telx | Common Stock
Subsequent Event [Line Items]
Issued (shares)			10,500,000
Subsequent Event | Telx | Senior Notes: | 3.400% Notes Due 2020
Subsequent Event [Line Items]
Face amount								$ 500,000,000
Stated interest rate								3.40%
Subsequent Event | Telx | Senior Notes: | 4.750% Notes Due 2025
Subsequent Event [Line Items]
Face amount								$ 450,000,000
Stated interest rate								4.75%
Digital Realty Trust, L.P. | Subsequent Event | Series I Preferred Stock
Subsequent Event [Line Items]
Issued (shares)	10,000,000
Preferred Stock, dividend rate	6.35%

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Debt of the Company

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Debt of the Company

Debt of the Company

In this Note 6, the “Company” refers only to Digital Realty Trust, Inc. and not to any of its subsidiaries.

The Company itself does not currently have any indebtedness. All debt is currently held directly or indirectly by the Operating Partnership.

Guarantee of Debt

The Company guarantees the Operating Partnership’s obligations with respect to its 5.875% notes due 2020 (2020 Notes), 5.250% notes due 2021 (2021 Notes), 3.950% notes due 2022 (3.950% 2022 Notes), 3.625% notes due 2022 (3.625% 2022 Notes) and its unsecured senior notes sold to Prudential Investment Management, Inc. and certain of its affiliates pursuant to the Amended and Restated Note Purchase and Private Shelf Agreement, as amended, which we refer to as the Prudential Shelf Facility. The Company and the Operating Partnership guarantee the obligations of Digital Stout Holding, LLC, a wholly owned subsidiary of the Operating Partnership, with respect to its 4.750% notes due 2023 (2023 Notes) and 4.250% notes due 2025 (2025 Notes). Prior to the completion of the Operating Partnership Merger (as defined in Note 7 "Debt of the Operating Partnership"), the Company and the Operating Partnership guaranteed the obligations of Digital Delta Holdings, LLC, a wholly owned subsidiary of Digital Realty Trust, Inc., with respect to its 3.400% Notes due 2020 (3.400% 2020 Notes) and 4.750% Notes due 2025 (4.750% 2025 Notes). Following the completion of the Operating Partnership Merger, the 3.400% 2020 Notes and 4.750% 2025 Notes became the senior unsecured obligations of the Operating Partnership and remain guaranteed by the Company. The Company is also the guarantor of the Operating Partnership’s and its subsidiary borrowers’ obligations under the global revolving credit facility and unsecured term loan.

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Income per Share (Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	30,365,091	20,443,722	29,947,931	22,322,087
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	2,635,444	2,815,512	2,698,215	2,745,730
Potentially dilutive 2029 Debentures
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	0	0	0	2,617,790
Series E Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	4,567,661	4,673,322	4,440,429	5,136,112
Series F Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	2,896,800	2,963,810	2,816,110	3,257,310
Series G Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	3,960,900	4,052,525	3,850,569	4,453,839
Series H Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	5,804,286	5,938,553	5,642,608	4,111,306
Shares subject to Forward Equity Offering
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	10,500,000	0	10,500,000	0

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Investment In Unconsolidated Joint Ventures

9 Months Ended

Sep. 30, 2015

Equity Method Investments and Joint Ventures [Abstract]

Investment In Unconsolidated Joint Ventures

Investment in Unconsolidated Joint Ventures

As of September 30, 2015, our investment in unconsolidated joint ventures consists of effective 50% interests in three joint ventures that own data center properties at 2001 Sixth Avenue in Seattle, Washington, 2020 Fifth Avenue in Seattle, Washington and 33 Chun Choi Street in Hong Kong, and effective 20% interests in two joint ventures, one of which owns 10 data center properties with an investment fund managed by Prudential Real Estate Investors (PREI^®), and the other which owns one data center property with an affiliate of Griffin Capital Essential Asset REIT, Inc. (GCEAR). The following tables present summarized financial information for the joint ventures as of September 30, 2015 and December 31, 2014 and for the nine months ended September 30, 2015 and 2014 (unaudited, in thousands):

	As of September 30, 2015										Nine Months Ended September 30, 2015
2015	Net Investment in Properties		Total Assets		Debt		Total Liabilities		Equity		Revenues		Property Operating Expense			Net Operating Income		Net Income
Total Unconsolidated Joint Ventures	$	763,828	$	939,481	$	460,418	$	558,704	$	380,777	$	96,407	$	(26,431	)	$	69,976	$	28,303
Our investment in and share of equity in earnings of unconsolidated joint ventures									$	103,703								$	12,170
	As of December 31, 2014										Nine Months Ended September 30, 2014
2014	Net Investment in Properties		Total Assets		Debt		Total Liabilities		Equity		Revenues		Property Operating Expense			Net Operating Income		Net Income
Total Unconsolidated Joint Ventures	$	779,752	$	942,107	$	461,548	$	569,895	$	372,212	$	71,882	$	(17,409	)	$	54,473	$	23,350
Our investment in and share of equity in earnings of unconsolidated joint ventures									$	94,729								$	9,513

Prudential Real Estate Investors (PREI ^®) Joint Venture

On March 5, 2014, we contributed the property at 636 Pierce Street in Somerset, New Jersey, which we acquired in December 2013, to our unconsolidated joint venture with the PREI^® fund that was formed in September 2013. The property was valued at approximately $40.4 million and subject to $26.1 million in debt, which the joint venture assumed. The PREI^® fund contributed approximately $11.4 million in cash for their 80% share of the net asset value of $14.3 million. Subsequent to the closing, the joint venture refinanced the existing debt with $23.0 million drawn from the joint venture’s bank facility. Including the refinance costs, the PREI^® fund contributed $17.5 million for the 636 Pierce Street property, bringing their contributed capital in the joint venture to $164.8 million.

The transaction produced a $1.9 million gain for the Company representing the difference between the $11.4 million of cash proceeds received by the Company for its 80% share of the net asset less the Company’s book value.

Griffin Capital Essential Asset REIT, Inc. (GCEAR) Joint Venture

On September 9, 2014, we formed a joint venture with an affiliate of GCEAR. We contributed to the joint venture the property located at 43915 Devin Shafron Drive (Building A) in Ashburn, Virginia, which is a Turn-Key Flex® data center property valued at approximately $185.5 million (excluding approximately $2.1 million of closing costs). GCEAR contributed cash to the joint venture and holds an 80% interest in the joint venture. We retained a 20% interest in the joint venture. The joint venture agreement provides for a current annual preferred return from cash flow first to GCEAR and then to us, after which a portion of any excess cash flows is shared by the partners based on their respective interests and the remaining portion is paid to us as a promote interest. We perform the day-to-day accounting and property management functions for the joint venture and the property and, as such, earn management fees. Although we are the managing member of the joint venture and manage the day-to-day activities, certain major decisions, including approval of annual budgets, require approval of the GCEAR member. Thus, we concluded we do not own a controlling interest and account for our interest in the joint venture as an equity method investment.

The joint venture arranged a $102.0 millionfive-year secured bank loan at LIBOR plus 225 basis points, representing a loan-to-value ratio of approximately 55%. The joint venture entered into an interest rate swap agreement to effectively fix the interest rate on approximately $51.0 million of borrowings under the loan through September 2019.  Twoone-year extensions of the maturity date are available under the loan agreement, which the joint venture may exercise if certain conditions are met. Proceeds from this loan offset the initial cash capital contribution amount required from GCEAR and was used to provide us with a special distribution on account of a portion of the contribution value of the property. The transaction generated approximately $167.5 million of net proceeds to us, comprised of our share of the initial draw-down on the bank loan in addition to GCEAR’s equity contribution, less our share of closing costs. Accordingly we recognized a gain of approximately $93.5 million on the sale of the 80% interest in the joint venture during the three months ended September 30, 2014.

Differences between the Company’s investment in the joint ventures and the amount of the underlying equity in net assets of the joint ventures are due to basis differences resulting from the Company’s equity investment recorded at its historical basis versus the fair value of the Company’s contributed interest in the joint ventures. Our proportionate share of the earnings or losses related to these unconsolidated joint ventures is reflected as equity in earnings of unconsolidated joint ventures on the accompanying consolidated income statements.

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Acquired Intangible Assets And Liabilities

9 Months Ended

Sep. 30, 2015

Acquired Intangible Assets And Liabilities [Abstract]

Acquired Intangible Assets And Liabilities

Acquired Intangible Assets and Liabilities

The following summarizes our acquired intangible assets (acquired in-place lease value and acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of September 30, 2015 and December 31, 2014.

	Balance as of
(Amounts in thousands)	September 30, 2015			December 31, 2014
Acquired in-place lease value:
Gross amount	$	652,629		$	680,419
Accumulated amortization	(460,469		)	(452,739		)
Net	$	192,160		$	227,680
Acquired above-market leases:
Gross amount	$	118,881		$	126,677
Accumulated amortization	(88,264		)	(88,072		)
Net	$	30,617		$	38,605
Acquired below-market leases:
Gross amount	$	278,514		$	282,670
Accumulated amortization	(189,882		)	(178,435		)
Net	$	88,632		$	104,235

Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase to rental revenues of $2.2 million and $2.4 million for the three months ended September 30, 2015 and 2014, respectively, and $6.9 million and $7.7 million for the nine months ended September 30, 2015 and 2014, respectively. The expected average remaining lives for acquired below-market leases and acquired above-market leases is 5.6 years and 3.4 years, respectively, as of September 30, 2015. Estimated annual amortization of acquired below-market leases, net of acquired above-market leases, for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows:

(Amounts in thousands)
Remainder of 2015	$	1,994
2016	7,554
2017	6,143
2018	4,534
2019	4,610
Thereafter	33,180
Total	$	58,015

Amortization of acquired in-place lease value (a component of depreciation and amortization expense) was $10.1 million and $16.5 million for the three months ended September 30, 2015 and 2014, respectively, and $32.2 million and $50.0 million for the nine months ended September 30, 2015 and 2014, respectively. The expected average amortization period for acquired in-place lease value is 6.0 years as of September 30, 2015. The weighted average remaining contractual life for acquired leases excluding renewals or extensions is 4.6 years as of September 30, 2015. Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows:

(Amounts in thousands)
Remainder of 2015	$	8,371
2016	31,893
2017	27,367
2018	25,100
2019	22,600
Thereafter	76,829
Total	$	192,160

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Debt of the Operating Partnership

9 Months Ended

Sep. 30, 2015

Digital Realty Trust, L.P.

Debt Of The Operating Partnership

Debt of the Operating Partnership

A summary of outstanding indebtedness of the Operating Partnership as of September 30, 2015 and December 31, 2014 is as follows (in thousands):

Indebtedness	Interest Rate at September 30, 2015		Maturity Date		Principal Outstanding September 30, 2015				Principal Outstanding December 31, 2014
Global revolving credit facility	Various	(1)	Nov 3, 2017		$	688,957		(2)	$	525,951		(2)
Unsecured term loan	Various	(3)(6)	Apr 16, 2017		938,276			(4)	976,600			(4)
Unsecured senior notes:
Prudential Shelf Facility:
Series C	9.680%		Jan 6, 2016		25,000				25,000
Series D	4.570%		Jan 20, 2015		—			(7)	50,000
Series E	5.730%		Jan 20, 2017		50,000				50,000
Series F	4.500%		Feb 3, 2015		—			(7)	17,000
Total Prudential Shelf Facility					75,000				142,000
Senior Notes:
4.50% notes due 2015	4.500%		Jul 15, 2015	(8)	—				375,000
5.875% notes due 2020	5.875%		Feb 1, 2020		500,000				500,000
5.25% notes due 2021	5.250%		Mar 15, 2021		400,000				400,000
3.95% notes due 2022	3.950%		Jul 1, 2022	(9)	500,000				—
3.625% notes due 2022	3.625%		Oct 1, 2022		300,000				300,000
4.75% notes due 2023	4.750%		Oct 13, 2023		453,840			(10)	467,310			(10)
4.25% notes due 2025	4.250%		Jan 17, 2025		605,120			(10)	623,080			(10)
Unamortized discounts					(17,601		)		(15,632		)
Total senior notes, net of discount					2,741,359				2,649,758
Total unsecured senior notes, net of discount					2,816,359				2,791,758

Indebtedness	Interest Rate at September 30, 2015	Maturity Date	Principal Outstanding September 30, 2015			Principal Outstanding December 31, 2014
Mortgage loans:
200 Paul Avenue 1-4 (5)	5.74%	Oct 8, 2015	—		(11)	68,665
2045 & 2055 Lafayette Street (5)	5.93%	Feb 6, 2017	61,728			62,563
34551 Ardenwood Boulevard 1-4 (5)	5.95%	Nov 11, 2016	50,700			51,339
1100 Space Park Drive (5)	5.89%	Dec 11, 2016	50,648			51,295
600 West Seventh Street	5.80%	Mar 15, 2016	46,466			47,825
150 South First Street (5)	6.30%	Feb 6, 2017	48,699			49,316
2334 Lundy Place (5)	5.96%	Nov 11, 2016	36,875			37,340
8025 North Interstate 35	4.09%	Mar 6, 2016	5,857			6,057
731 East Trade Street	8.22%	Jul 1, 2020	3,539			3,836
Unamortized net premiums			475			582
Total mortgage loans, including premiums			304,987			378,818
Total indebtedness			$	4,748,579		$	4,673,127

_________________________________ 

(1) The interest rate for borrowings under the global revolving credit facility equals the applicable index plus a margin of 110 basis points, which is based on the current credit ratings of our long-term debt. An annual facility fee of 20 basis points, which is based on the credit ratings of our long-term debt, is due and payable quarterly on the total commitment amount of the facility. Twosix-month extensions are available, which we may exercise if certain conditions are met.

(2) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands):

Denomination of Draw	Balance as of September 30, 2015			Weighted-average interest rate		Balance as of December 31, 2014			Weighted-average interest rate
Floating Rate Borrowing (a)
U.S. dollar ($)	$	50,000		1.29	%	$	90,000		1.27	%
British pound sterling (£)	110,434		(c)	1.62	%	132,716		(d)	1.61	%
Euro (€)	214,822		(c)	1.00	%	58,071		(d)	1.13	%
Australian dollar (AUD)	88,497		(c)	3.15	%	72,676		(d)	3.74	%
Hong Kong dollar (HKD)	88,476		(c)	1.36	%	79,336		(d)	1.34	%
Japanese yen (JPY)	14,265		(c)	1.13	%	13,201		(d)	1.17	%
Singapore dollar (SGD)	46,475		(c)	2.42	%	6,565		(d)	1.64	%
Canadian dollar (CAD)	70,988		(c)	1.86	%	62,386		(d)	2.39	%
Total	$	683,957		1.63	%	$	514,951		1.84	%
Base Rate Borrowing (b)
U.S. dollar ($)	$	5,000		3.35	%	$	11,000		3.35	%
Total borrowings	$	688,957		1.65	%	$	525,951		1.87	%

(a) The interest rates for floating rate borrowings under the global revolving credit facility equal the applicable index plus a margin of 110 basis points, which is based on the credit ratings of our long-term debt.

(b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt.

(c) Based on exchange rates of $1.51 to £1.00, $1.12 to €1.00, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.70 to 1.00 SGD and $0.75 to 1.00 CAD, respectively, as of September 30, 2015.

(d) Based on exchange rates of $1.56 to £1.00, $1.21 to €1.00, $0.82 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.75 to 1.00 SGD and $0.86 to 1.00 CAD, respectively, as of December 31, 2014.

(3) Interest rates are based on our current senior unsecured debt ratings and are 120 basis points over the applicable index for floating rate advances. Twosix-month extensions are available, which we may exercise if certain conditions are met.

(4) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands):

Denomination of Draw	Balance as of September 30, 2015			Weighted-average interest rate			Balance as of December 31, 2014			Weighted-average interest rate
U.S. dollar ($)	$	410,905		1.40	%	(b)	$	410,905		1.36	%	(d)
Singapore dollar (SGD)	160,659		(a)	2.08	%	(b)	172,426		(c)	1.45	%	(d)
British pound sterling (£)	182,935		(a)	1.78	%		188,365		(c)	1.76	%
Euro (€)	111,211		(a)	1.20	%		120,375		(c)	1.22	%
Australian dollar (AUD)	72,566		(a)	3.34	%		84,529		(c)	3.98	%
Total	$	938,276		1.72	%	(b)	$	976,600		1.66	%	(d)

(a) Based on exchange rates of $0.70 to 1.00 SGD, $1.51 to £1.00, $1.12 to €1.00 and $0.70 to 1.00 AUD, respectively, as of September 30, 2015.

(b) As of September 30, 2015, the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.16% (Singapore dollar) and 1.94% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps.

(c) Based on exchange rates of $0.75 to 1.00 SGD, $1.56 to £1.00, $1.21 to €1.00 and $0.82 to 1.00 AUD, respectively, as of December 31, 2014.

(d) As of December 31, 2014, the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.01% (Singapore dollar) and 2.00% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps.

(5) The respective borrower’s assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

(6) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by the U.S. dollar and Singapore dollar tranches of the unsecured term loan. See Note 14 "Derivative Instruments" for further information.

(7) These unsecured senior notes were repaid in full at maturity.

(8) On May 26, 2015, the Operating Partnership redeemed the entire outstanding principal amount of its 4.500% Notes due 2015 (2015 Notes), at a redemption price of 100% of the principal amount of the 2015 Notes plus accrued and unpaid interest thereon up to, but excluding, the redemption date.

(9) On June 23, 2015, the Operating Partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum. The purchase price paid by the initial purchasers was 99.236% of the principal amount.

(10) Based on exchange rate of $1.51 to £1.00 as of September 30, 2015 and $1.56 to £1.00 as of December 31, 2014.

(11) This loan was repaid in full in September 2015.

Global Revolving Credit Facility

On August 15, 2013, the Operating Partnership refinanced its global revolving credit facility, increasing its total borrowing capacity to $2.0 billion from $1.8 billion. The global revolving credit facility has an accordion feature that would enable us to increase the borrowing capacity of the credit facility to $2.55 billion, subject to the receipt of lender commitments and other conditions precedent. The refinanced facility matures on November 3, 2017, with twosix-month extension options available. The interest rate for borrowings under the expanded facility equals the applicable index plus a margin which is based on the credit ratings of our long-term debt and is currently 110 basis points. An annual facility fee on the total commitment amount of the facility, based on the credit ratings of our long-term debt, currently 20 basis points, is payable quarterly. Funds may be drawn in U.S., Canadian, Singapore, Australian and Hong Kong dollars, as well as Euro, British pound sterling, Swiss franc, Japanese yen and Mexican peso denominations. As of September 30, 2015, interest rates are based on 1-month LIBOR, 1-month GBP LIBOR, 1-month EURIBOR, 1-month BBR, 1-month HIBOR, 1-month JPY LIBOR, 1-month SOR and 1-month CDOR plus a margin of 1.10%. The facility also bore a base borrowing rate of 3.35% (USD) which is based on U.S. Prime Rate plus a margin of 0.10%. We have used and intend to use available borrowings under the global revolving credit facility to acquire additional properties, to fund development opportunities and for general working capital and other corporate purposes, including potentially for the repurchase, redemption or retirement of outstanding debt or equity securities. As of September 30, 2015, we have capitalized approximately $18.0 million of financing costs related to the global revolving credit facility. As of September 30, 2015, approximately $689.0 million was drawn under the global revolving credit facility and $5.5 million of letters of credit were issued.

The global revolving credit facility contains various restrictive covenants, including limitations on our ability to incur additional indebtedness, make certain investments or merge with another company, and requirements to maintain financial coverage ratios, including with respect to unencumbered assets. In addition, the global revolving credit facility restricts Digital Realty Trust, Inc. from making distributions to its stockholders, or redeeming or otherwise repurchasing shares of its capital stock, after the occurrence and during the continuance of an event of default, except in limited circumstances including as necessary to enable Digital Realty Trust, Inc. to maintain its qualification as a REIT and to minimize the payment of income or excise tax. As of September 30, 2015, we were in compliance with all of such covenants.

Unsecured Term Loan

On August 15, 2013, we refinanced the senior unsecured multi-currency term loan facility, increasing its total borrowing capacity to $1.0 billion from $750.0 million. Pursuant to the accordion feature, total commitments can be increased to $1.1 billion, subject to the receipt of lender commitments and other conditions precedent. The facility matures on April 16, 2017, with twosix-month extension options available. Interest rates are based on our senior unsecured debt ratings and are currently 120 basis points over the applicable index for floating rate advances. Funds may be drawn in U.S., Singapore and Australian dollars, as well as Euro and British pound sterling denominations with the option to add Hong Kong dollars and Japanese yen upon an accordion exercise. Based on exchange rates in effect at September 30, 2015, the balance outstanding is approximately $938.3 million. We have used borrowings under the term loan for acquisitions, repayment of indebtedness, development, working capital and general corporate purposes. The covenants under this loan are consistent with our global revolving credit facility and, as of September 30, 2015, we were in compliance with all of such covenants. As of September 30, 2015, we have capitalized approximately $8.4 million of financing costs related to the unsecured term loan.

3.950% Notes due 2022

On June 23, 2015, the Operating Partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum (the 3.950% 2022 Notes). The public offering price was 99.236% of the principal amount. The 3.950% 2022 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 3.950% 2022 Notes is payable on January 1 and July 1 of each year, beginning on January 1, 2016. The net proceeds from the offering after deducting the original issue discount of approximately $3.8 million and underwriting commissions and expenses of approximately $4.4 million was approximately $491.8 million. The Operating Partnership will use the net proceeds from the offering of the 3.950% 2022 Notes to fund certain eligible green projects, including the development and redevelopment of such projects. Pending such uses, the Operating Partnership temporarily repaid borrowings under its global revolving credit facility. The 3.950% 2022 Notes have been reflected net of discount in the condensed consolidated balance sheet. The indenture governing the 3.950% 2022 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At September 30, 2015, we were in compliance with each of these financial covenants.

3.400% Notes due 2020 and 4.750% Notes due 2025

On October 1, 2015, Digital Delta Holdings, LLC, a Delaware limited liability company and wholly owned subsidiary of Digital Realty Trust, Inc., issued $500.0 million aggregate principal amount of its 3.400% Notes due 2020 (the “3.400% 2020 Notes”) and $450.0 million aggregate principal amount of its 4.750% Notes due 2025 (the “4.750% 2025 Notes” and together with the 3.400% 2020 Notes, the “Delta Holdings Notes”), fully and unconditionally guaranteed by Digital Realty Trust, Inc. and Digital Realty Trust, L.P. The terms of the Delta Holdings Notes are governed by an indenture, dated as of October 1, 2015, by and among Digital Delta Holdings, LLC, as issuer, Digital Realty Trust, Inc. and Digital Realty Trust, L.P., as guarantors, and Wells Fargo Bank, National Association, as trustee. The indenture contains various restrictive covenants, including limitations on the ability of Digital Realty Trust, L.P. and its subsidiaries to incur additional indebtedness and requirements to maintain a pool of unencumbered assets.

Digital Delta Holdings, LLC used the net proceeds from the offering to fund a portion of the aggregate purchase price for the acquisition of Telx Holdings, Inc. (the “Telx Acquisition”).

The purchase price paid by the initial purchasers for the 3.400% 2020 Notes and 4.750% 2025 Notes was 99.777% and 100.000% of the principal amount thereof, respectively. The 3.400% 2020 Notes and 4.750% 2025 Notes bear interest at 3.400% and 4.750% per annum, respectively. Interest is payable on April 1 and October 1 of each year, beginning April 1, 2016, until the respective maturity dates of October 1, 2020 and October 1, 2025.

Pursuant to the terms of the indenture, within five business days following the consummation of the Telx Acquisition, Digital Delta Holdings, LLC was required to merge with and into Digital Realty Trust, L.P., with Digital Realty Trust, L.P. surviving the merger (the “Operating Partnership Merger”) and to assume Digital Delta Holdings, LLC’s obligations under the Delta Holdings Notes and the related indenture and registration rights agreement by operation of law. The Operating Partnership Merger was consummated on October 13, 2015.

Subsequent to the Operating Partnership Merger, the Notes are the Operating Partnership’s senior unsecured obligations and rank equally in right of payment with all of the Operating Partnership’s other unsecured and unsubordinated indebtedness from time to time outstanding. However, the Delta Holdings Notes are effectively subordinated in right of payment to all of the operating partnership’s existing and future secured indebtedness (to the extent of the collateral securing the same) and to all existing and future liabilities and preferred equity of the Operating Partnership’s subsidiaries. Prior to the completion of the Operating Partnership Merger, Digital Realty Trust, Inc. and the Operating Partnership guaranteed the obligations of the Delta Holdings Notes. Following the completion of the Operating Partnership Merger, the Delta Holdings Notes became the senior unsecured obligations of the Operating Partnership and remained guaranteed by Digital Realty Trust, Inc.

The Delta Holdings Notes will be redeemable in whole at any time or in part from time to time, at the Operating Partnership’s option, at a redemption price equal to the sum of:

• an amount equal to 100% of the principal amount of the Delta Holdings Notes to be redeemed plus accrued and unpaid interest up to, but not including, the redemption date; and

• a make-whole premium calculated in accordance with the indenture.

Notwithstanding the foregoing, if any of the 3.400% 2020 Notes are redeemed on or after September 1, 2020 or if any of the 4.750% 2025 Notes are redeemed on or after July 1, 2025, the redemption price will not include a make-whole premium.

Due to Parent Company

On August 24, 2015, Digital Realty Trust, Inc. completed an underwritten public offering of 10,000,000 shares of 6.350% Series I Cumulative Redeemable Preferred Stock (the "Series I Preferred Stock"), for net proceeds of approximately $242.7 million after deducting the underwriting discount. Digital Realty Trust, Inc. used the net proceeds from the offering to fund a portion of the aggregate purchase price for the Telx Acquisition. Pending the closing of the Telx Acquisition, Digital Realty Trust, Inc. loaned the net proceeds from the Series I Preferred Stock offering of approximately $242.7 million to the Operating Partnership.  The intercompany note was scheduled to mature on January 11, 2016 with an interest rate of 4.50% per annum.  As of September 30, 2015, the full amount of the intercompany note was outstanding and approximately $1.2 million of accrued interest was recorded during the three months ended September 30, 2015.  On October 8, 2015, the Operating Partnership repaid the intercompany note in full, with accrued interest, in the amount of $244.1 million.  On October 13, 2015, in connection with the consummation of the Operating Partnership Merger, the Operating Partnership issued to Digital Realty Trust, Inc. 10,000,000 series I cumulative redeemable preferred units with substantially identical terms as the Series I Preferred Stock.

The table below summarizes our debt maturities and principal payments as of September 30, 2015 (in thousands):

	Global Revolving Credit Facility(1)		Unsecured Term Loan (1)		Prudential Shelf Facility		Senior Notes			Mortgage Loans		Total Debt
Remainder of 2015	$	—	$	—	$	—	$	—		$	1,768	$	1,768
2016	—		—		25,000		—			191,979		216,979
2017	688,957		938,276		50,000		—			108,395		1,785,628
2018	—		—		—		—			593		593
2019	—		—		—		—			644		644
Thereafter	—		—		—		2,758,960			1,133		2,760,093
Subtotal	$	688,957	$	938,276	$	75,000	$	2,758,960		$	304,512	$	4,765,705
Unamortized discount	—		—		—		(17,601		)	—		(17,601		)
Unamortized premium	—		—		—		—			475		475
Total	$	688,957	$	938,276	$	75,000	$	2,741,359		$	304,987	$	4,748,579

(1) Subject to twosix-month extension options exercisable by us. The bank group is obligated to grant the extension options provided we give proper notice, we make certain representations and warranties and no default exists under the global revolving credit facility and the unsecured term loan, as applicable.

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Equity And Accumulated Other Comprehensive Income, Net (Equity Distribution Agreements) (Narrative) (Details)					4 Months Ended	9 Months Ended
	Oct. 13, 2015 shares	Oct. 08, 2015 USD ($) shares	Aug. 24, 2015 USD ($) $ / shares shares	Jul. 20, 2015 shares	Dec. 31, 2015 $ / shares	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) $ / shares	Jun. 30, 2011 USD ($)
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Gross proceeds from the issuance of preferred stock						$ 250,000,000	$ 365,000,000
Minimum period without dividends to acquire voting rights					18 months
Subsequent Event
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from common stock issuance		$ 674,100,000
Common Stock
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issued (shares) | shares				10,500,000
Common Stock | Subsequent Event
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of shares issued in settlement | shares		10,500,000
Series I Preferred Stock
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issued (shares) | shares			10,000,000
Preferred Stock, dividend rate			6.35%			6.35%
Gross proceeds from the issuance of preferred stock			$ 241,700,000
Dividends ($ per share) | $ / shares			$ 1.5875
Preferred Stock, liquidation preference per share/unit | $ / shares			$ 25.00			$ 25.00		$ 0.00
Conversion ratio					0.76231
Series I Preferred Stock | Scenario, Forecast
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividends ($ per share) | $ / shares					$ 0.56003
2011 Equity Distribution Agreements
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Aggregate offering price of the distribution agreement maximum									$ 400,000,000
Net proceeds from sale of common stock						$ 342,700,000
Issuance of common shares (shares) | shares						5,700,000
Equity distribution agreements at an average price ($ per share) | $ / shares						$ 60.35
Payment of commissions to sales agents						$ 3,500,000
Aggregate offering price remaining available for offer and sale						53,800,000
Digital Realty Trust, L.P.
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Redemption value of OP units						$ 170,500,000		$ 179,000,000
Digital Realty Trust, L.P. | Series I Preferred Stock | Subsequent Event
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issued (shares) | shares	10,000,000
Preferred Stock, dividend rate	6.35%

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Equity And Accumulated Other Comprehensive Income, Net (Summary Of Activity For Noncontrolling Interests In The Operating Partnership) (Details)	9 Months Ended
	Sep. 30, 2015 shares
Common and Incentive Unit Activity [Roll Forward]
Beginning balance	3,013,661
Redemption of common units for shares of Digital Realty Trust, Inc. common stock	(42,500)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock	(76,087)
Cancellation of incentive units held by employees and directors	(150,140)
Grant of incentive units to employees and directors	90,679
Ending balance	2,835,613
Common Units
Common and Incentive Unit Activity [Roll Forward]
Beginning balance	1,463,814
Redemption of common units for shares of Digital Realty Trust, Inc. common stock	(42,500)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock	0
Cancellation of incentive units held by employees and directors	0
Grant of incentive units to employees and directors	0
Ending balance	1,421,314
Incentive Units
Common and Incentive Unit Activity [Roll Forward]
Beginning balance	1,549,847
Redemption of common units for shares of Digital Realty Trust, Inc. common stock	0
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock	(76,087)
Cancellation of incentive units held by employees and directors	(150,140)
Grant of incentive units to employees and directors	90,679
Ending balance	1,414,299

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Income Taxes (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Income Tax Disclosure [Abstract]
Income distributed	100.00%
Net deferred tax liability	$ 135.4

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Equity And Accumulated Other Comprehensive Income, Net (Tables)

9 Months Ended

Sep. 30, 2015

Equity And Accumulated Other Comprehensive Income, Net [Abstract]

Ownership Interest In The Operating Partnership

The following table shows the ownership interests in the Operating Partnership as of September 30, 2015 and December 31, 2014:

	September 30, 2015			December 31, 2014
	Number of units	Percentage of total		Number of units	Percentage of total
Digital Realty Trust, Inc.	135,843,684	98.0	%	135,626,255	97.8	%
Noncontrolling interests consist of:
Common units held by third parties	1,421,314	1.0		1,463,814	1.1
Incentive units held by employees and directors (see Note 13)	1,414,299	1.0		1,549,847	1.1
	138,679,297	100.0	%	138,639,916	100.0	%

Summary Of Activity For Noncontrolling Interests In The Operating Partnership

The following table shows activity for the noncontrolling interests in the Operating Partnership for the nine months ended September 30, 2015:

	Common Units		Incentive Units		Total
As of December 31, 2014	1,463,814		1,549,847		3,013,661
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1)	(42,500	)	—		(42,500	)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1)	—		(76,087	)	(76,087	)
Cancellation of incentive units held by employees and directors	—		(150,140	)	(150,140	)
Grant of incentive units to employees and directors	—		90,679		90,679
As of September 30, 2015	1,421,314		1,414,299		2,835,613

(1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.

Schedule Of Dividends/Distributions

We have declared and paid the following dividends on our common and preferred stock for the nine months ended September 30, 2015 (in thousands, except per share data):

Date dividend declared	Dividend payment date	Series E Preferred Stock		Series F Preferred Stock		Series G Preferred Stock		Series H Preferred Stock		Common Stock
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	115,419
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		115,458
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		115,454
		$	15,093	$	9,069	$	11,016	$	20,190	$	346,331
Annual rate of dividend per share		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

Schedule Of Accumulated Other Comprehensive Income, Net

The accumulated balances for each item within other comprehensive income, net are as follows (in thousands):

	Foreign currency translation adjustments				Cash flow hedge adjustments			Accumulated other comprehensive income (loss), net
Balance as of December 31, 2014	$	(39,567	)		$	(5,479	)	$	(45,046	)
Net current period change	(40,688		)	(1)	(4,290		)	(44,978		)
Reclassification to interest expense from interest rate swaps	—				2,036			2,036
Balance as of September 30, 2015	$	(80,255	)		$	(7,733	)	$	(87,988	)

(1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

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Debt of the Operating Partnership (Outstanding Indebtedness - Global Revolving Credit Facility) (Details) $ in Thousands	Sep. 30, 2015 USD ($) $ / ¥ $ / CAD $ / £ $ / HKD $ / SGD $ / € $ / AUD	Dec. 31, 2014 USD ($) $ / ¥ $ / CAD $ / £ $ / HKD $ / SGD $ / € $ / AUD
SGD
Debt Instrument [Line Items]
Exchange rate | $ / SGD	0.70	0.75
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 688,957	$ 525,951
Digital Realty Trust, L.P. | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £	1.51	1.56
Digital Realty Trust, L.P. | EUR
Debt Instrument [Line Items]
Exchange rate | $ / €	1.12	1.21
Digital Realty Trust, L.P. | AUD
Debt Instrument [Line Items]
Exchange rate | $ / AUD	0.70	0.82
Digital Realty Trust, L.P. | Global revolving credit facility
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 688,957	$ 525,951
Weighted-average interest rate	1.65%	1.87%
Digital Realty Trust, L.P. | Global revolving credit facility | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 683,957	$ 514,951
Weighted-average interest rate	1.63%	1.84%
Digital Realty Trust, L.P. | Global revolving credit facility | USD | Base Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 5,000	$ 11,000
Weighted-average interest rate	3.35%	3.35%
Digital Realty Trust, L.P. | Global revolving credit facility | USD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 50,000	$ 90,000
Weighted-average interest rate	1.29%	1.27%
Digital Realty Trust, L.P. | Global revolving credit facility | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £	1.51	1.56
Digital Realty Trust, L.P. | Global revolving credit facility | GBP | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 110,434	$ 132,716
Weighted-average interest rate	1.62%	1.61%
Digital Realty Trust, L.P. | Global revolving credit facility | EUR
Debt Instrument [Line Items]
Exchange rate | $ / €	1.12	1.21
Digital Realty Trust, L.P. | Global revolving credit facility | EUR | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 214,822	$ 58,071
Weighted-average interest rate	1.00%	1.13%
Digital Realty Trust, L.P. | Global revolving credit facility | AUD
Debt Instrument [Line Items]
Exchange rate | $ / AUD	0.70	0.82
Digital Realty Trust, L.P. | Global revolving credit facility | AUD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 88,497	$ 72,676
Weighted-average interest rate	3.15%	3.74%
Digital Realty Trust, L.P. | Global revolving credit facility | HKD
Debt Instrument [Line Items]
Exchange rate | $ / HKD	0.13	0.13
Digital Realty Trust, L.P. | Global revolving credit facility | HKD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 88,476	$ 79,336
Weighted-average interest rate	1.36%	1.34%
Digital Realty Trust, L.P. | Global revolving credit facility | JPY
Debt Instrument [Line Items]
Exchange rate | $ / ¥	0.01	0.01
Digital Realty Trust, L.P. | Global revolving credit facility | JPY | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 14,265	$ 13,201
Weighted-average interest rate	1.13%	1.17%
Digital Realty Trust, L.P. | Global revolving credit facility | SGD
Debt Instrument [Line Items]
Exchange rate | $ / SGD	0.70	0.75
Digital Realty Trust, L.P. | Global revolving credit facility | SGD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 46,475	$ 6,565
Weighted-average interest rate	2.42%	1.64%
Digital Realty Trust, L.P. | Global revolving credit facility | CAD
Debt Instrument [Line Items]
Exchange rate | $ / CAD	0.75	0.86
Digital Realty Trust, L.P. | Global revolving credit facility | CAD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 70,988	$ 62,386
Weighted-average interest rate	1.86%	2.39%

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Capital And Accumulated Other Comprehensive Income

9 Months Ended

Sep. 30, 2015

Partners' Capital Notes [Abstract]

Capital And Accumulated Other Comprehensive Income

Capital and Accumulated Other Comprehensive Income

(a) Allocations of Net Income and Net Losses to Partners

Except for special allocations to holders of profits interest units described below in Note 13 “Incentive Plan—Long-Term Incentive Units,” the Operating Partnership’s net income will generally be allocated to the General Partner to the extent of the accrued preferred return on its preferred units, and then to the General Partner and the Operating Partnership’s limited partners in accordance with the respective percentage interests in the common units issued by the Operating Partnership. Net loss will generally be allocated to the General Partner and the Operating Partnership’s limited partners in accordance with the respective common percentage interests in the Operating Partnership until the limited partner’s capital is reduced to zero and any remaining net loss would be allocated to the General Partner. However, in some cases, losses may be disproportionately allocated to partners who have guaranteed our debt. The allocations described above are subject to special allocations relating to depreciation deductions and to compliance with the provisions of Sections 704(b) and 704(c) of the Code, and the associated Treasury Regulations.

(b) Partnership Units

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of the General Partner’s common stock at the time of redemption. Alternatively, the General Partner may elect to acquire those common units in exchange for shares of the General Partner’s common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, the Operating Partnership evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the limited partners’ common units and the vested incentive units. Based on the results of this analysis, the Operating Partnership concluded that the common and vested incentive Operating Partnership units met the criteria to be classified within capital.

The redemption value of the limited partners’ common units and the vested incentive units was approximately $170.5 million and $179.0 million based on the closing market price of Digital Realty Trust, Inc.’s common stock on September 30, 2015 and December 31, 2014, respectively.

(c) Distributions

All distributions on the Operating Partnership’s units are at the discretion of Digital Realty Trust, Inc.’s board of directors. The Operating Partnership has declared and paid the following distributions on its common and preferred units for the nine months ended September 30, 2015 (in thousands, except for per unit data):

Date distribution declared	Distribution payment date	Series E Preferred Units		Series F Preferred Units		Series G Preferred Units		Series H Preferred Units		Common Units
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	117,896
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		117,938
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		117,962
		$	15,093	$	9,069	$	11,016	$	20,190	$	353,796
Annual rate of distribution per unit		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

(d) Accumulated Other Comprehensive Income

The accumulated balances for each item within other comprehensive income are as follows (in thousands):

	Foreign currency translation adjustments				Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance as of December 31, 2014	$	(42,138	)		$	(6,295	)	$	(48,433	)
Net current period change	(41,480		)	(1)	(4,374		)	(45,854		)
Reclassification to interest expense from interest rate swaps	—				2,077			2,077
Balance as of September 30, 2015	$	(83,618	)		$	(8,592	)	$	(92,210	)

(1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

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Subsequent Events

9 Months Ended

Sep. 30, 2015

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On October 9, 2015, the Company completed the Telx Acquisition, pursuant to an Agreement and Plan of Merger (the “Merger Agreement”), dated as of July 13, 2015, by and among the Company, Digital Delta, Inc., a Delaware corporation and wholly owned subsidiary of the Company, Telx Holdings, Inc. and BSR LLC, as representative of the sellers. The purchase price for the Telx Acquisition was approximately $1.886 billion (subject to certain adjustments contemplated by the Merger Agreement). The purchase price was paid in cash and was funded with the net proceeds from the (i) public offering of 10,000,000 shares of the Company’s 6.350% series I cumulative redeemable preferred stock, par value $0.01 per share, with a liquidation preference of $25.00 per share, completed on August 24, 2015, (ii) private placement by Digital Delta Holdings, LLC, a Delaware limited liability company and then-wholly owned subsidiary of the Company, of $500 million aggregate principal amount of its 3.400% Notes due 2020 and $450 million aggregate principal amount of its 4.750% Notes due 2025 completed on October 1, 2015, and (iii) sale of 10,500,000 shares of the Company’s common stock on October 8, 2015 for net proceeds of approximately $674.1 million pursuant to certain forward sale agreements entered into in connection with the underwritten public offering of the Company’s common stock completed on July 20, 2015.

On October 13, 2015, the Company, as sole general partner of the Operating Partnership executed the Fourteenth Amended and Restated Agreement of Limited Partnership of the Operating Partnership in connection with the Operating Partnership’s issuance to the Company of 10,000,000 of its 6.350% series I cumulative redeemable preferred units of partnership interests, or the series I preferred units, as partial consideration for the Operating Partnership Merger. The series I preferred units have substantially similar rights, preferences and other privileges as the series I preferred stock.

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Debt of the Operating Partnership (Summary of Outstanding Indebtedness) (Details)			9 Months Ended
	Jun. 23, 2015 USD ($)	May. 26, 2015	Sep. 30, 2015 USD ($) extension $ / £	Dec. 31, 2014 USD ($) $ / £
Debt Instrument [Line Items]
Unsecured senior notes, net of discount			$ 2,816,359,000	$ 2,791,758,000
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of September 30, 2015			688,957,000	525,951,000
Unsecured term loan
Debt Instrument [Line Items]
Balance as of September 30, 2015			$ 938,276,000	976,600,000
Senior Notes: | 5.875% notes due 2020
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.875%
Senior Notes: | 5.25% notes due 2021
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.25%
Senior Notes: | 3.95% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	3.95%		3.95%
Unamortized discounts	$ (3,800,000)
Face amount	$ 500,000,000.0
Principal received relative to par value	99.236%
Senior Notes: | 3.625% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			3.625%
Senior Notes: | 4.75% notes due 2023
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.75%
Senior Notes: | 4.25% notes due 2025
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.25%
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Subtotal			$ 4,765,705,000
Unamortized discounts			(17,601,000)
Unsecured senior notes, net of discount			$ 2,816,359,000	$ 2,791,758,000
Digital Realty Trust, L.P. | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £			1.51	1.56
Digital Realty Trust, L.P. | Global revolving credit facility
Debt Instrument [Line Items]
Maturity Date			Nov. 03, 2017
Balance as of September 30, 2015			$ 688,957,000	$ 525,951,000
Subtotal			688,957,000
Unamortized discounts			$ 0
Number of extension options | extension			2
Debt instrument, extension term			6 months
Facility fee			0.20%
Digital Realty Trust, L.P. | Global revolving credit facility | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £			1.51	1.56
Digital Realty Trust, L.P. | Global revolving credit facility | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015			$ 683,957,000	$ 514,951,000
Interest rate basis spread			1.10%
Digital Realty Trust, L.P. | Global revolving credit facility | Floating Rate | GBP
Debt Instrument [Line Items]
Balance as of September 30, 2015			$ 110,434,000	132,716,000
Digital Realty Trust, L.P. | Unsecured term loan
Debt Instrument [Line Items]
Maturity Date			Apr. 16, 2017
Balance as of September 30, 2015			$ 938,276,000	976,600,000
Subtotal			938,276,000
Unamortized discounts			$ 0
Number of extension options | extension			2
Debt instrument, extension term			6 months
Interest rate basis spread			1.20%
Digital Realty Trust, L.P. | Unsecured term loan | GBP
Debt Instrument [Line Items]
Balance as of September 30, 2015			$ 182,935,000	188,365,000
Digital Realty Trust, L.P. | Unsecured term loan | Floating Rate
Debt Instrument [Line Items]
Number of extension options | extension			2
Debt instrument, extension term			6 months
Digital Realty Trust, L.P. | Prudential Shelf Facility:
Debt Instrument [Line Items]
Subtotal			$ 75,000,000	142,000,000
Unamortized discounts			$ 0
Digital Realty Trust, L.P. | Prudential Shelf Facility: | Series C
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			9.68%
Maturity Date			Jan. 06, 2016
Subtotal			$ 25,000,000	25,000,000
Digital Realty Trust, L.P. | Prudential Shelf Facility: | Series D
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.57%
Maturity Date			Jan. 20, 2015
Subtotal			$ 0	50,000,000
Digital Realty Trust, L.P. | Prudential Shelf Facility: | Series E
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.73%
Maturity Date			Jan. 20, 2017
Subtotal			$ 50,000,000	50,000,000
Digital Realty Trust, L.P. | Prudential Shelf Facility: | Series F
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.50%
Maturity Date			Feb. 03, 2015
Subtotal			$ 0	17,000,000
Digital Realty Trust, L.P. | Senior Notes:
Debt Instrument [Line Items]
Subtotal			2,758,960,000
Unamortized discounts			(17,601,000)	(15,632,000)
Unsecured senior notes, net of discount			$ 2,741,359,000	2,649,758,000
Digital Realty Trust, L.P. | Senior Notes: | 4.50% notes due 2015
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.50%
Maturity Date			Jul. 15, 2015
Subtotal			$ 0	375,000,000
Redemption price		100.00%
Digital Realty Trust, L.P. | Senior Notes: | 5.875% notes due 2020
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.875%
Maturity Date			Feb. 01, 2020
Subtotal			$ 500,000,000	500,000,000
Digital Realty Trust, L.P. | Senior Notes: | 5.25% notes due 2021
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.25%
Maturity Date			Mar. 15, 2021
Subtotal			$ 400,000,000	400,000,000
Digital Realty Trust, L.P. | Senior Notes: | 3.95% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			3.95%
Maturity Date			Jul. 01, 2022
Subtotal			$ 500,000,000	0
Digital Realty Trust, L.P. | Senior Notes: | 3.625% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			3.625%
Maturity Date			Oct. 01, 2022
Subtotal			$ 300,000,000	300,000,000
Digital Realty Trust, L.P. | Senior Notes: | 4.75% notes due 2023
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.75%
Maturity Date			Oct. 13, 2023
Subtotal			$ 453,840,000	467,310,000
Digital Realty Trust, L.P. | Senior Notes: | 4.25% notes due 2025
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.25%
Maturity Date			Jan. 17, 2025
Subtotal			$ 605,120,000	$ 623,080,000

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Investments In Real Estate (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) property	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) property	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire property			$ 46,600
Gross Proceeds	$ 206,100		206,100
Gain on Sale			94,300
Impairment of investments in real estate	0	$ 12,500	0	$ 12,500	$ 126,500
Assets	9,501,013		9,501,013		9,526,784
Total liabilities	5,465,362		5,465,362		$ 5,612,546
Deer Park 3
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire property			1,600
3 Loyang Way
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire property			$ 45,000
Renewal term			28 years
100 Quannapowitt Parkway
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	31,100		$ 31,100
Gain on Sale			10,100
3300 East Birch Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	14,200		14,200
Gain on Sale			7,500
833 Chestnut Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	160,800		160,800
Gain on Sale			76,700
833 Chestnut Street | Notes Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	$ 9,000		$ 9,000
Midwest and Northeast Regions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property					5
Fiscal Year-End 2014 Identified Properties for Disposal
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property	5		5
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property	3		3
Assets	$ 173,500		$ 173,500
Total liabilities	$ 6,900		$ 6,900
Held-for-sale | Assets Identified for Disposal Subsequent to First Quarter 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property	8		8

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Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 57,842	$ 130,161	$ 318,164	$ 238,210
Other comprehensive income:
Foreign currency translation adjustments	(19,105)	(39,470)	(41,480)	(30,730)
Increase (decrease) in fair value of interest rate swaps	(2,534)	2,435	(4,374)	(3,647)
Reclassification to interest expense from interest rate swaps	574	867	2,077	2,567
Comprehensive income	36,777	93,993	274,387	206,400
Comprehensive income attributable to noncontrolling interests	(463)	(1,656)	(4,657)	(3,541)
Comprehensive income attributable to Digital Realty Trust, Inc.	36,314	92,337	269,730	202,859
Digital Realty Trust, L.P.
Net income	56,689	130,161	317,011	238,210
Other comprehensive income:
Foreign currency translation adjustments	(19,105)	(39,470)	(41,480)	(30,730)
Increase (decrease) in fair value of interest rate swaps	(2,534)	2,435	(4,374)	(3,647)
Reclassification to interest expense from interest rate swaps	574	867	2,077	2,567
Comprehensive income	$ 35,624	$ 93,993	$ 273,234	$ 206,400

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Organization And Description Of Business

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization And Description Of Business

Organization and Description of Business

Digital Realty Trust, Inc. through its controlling interest in Digital Realty Trust, L.P. (the Operating Partnership) and the subsidiaries of the Operating Partnership (collectively, we, our, us or the Company) is engaged in the business of owning, acquiring, developing and managing technology-related real estate. The Company is focused on providing data center and colocation solutions for domestic and international tenants across a variety of industry verticals ranging from financial services, cloud and information technology services, to manufacturing, energy, healthcare, and consumer products. As of September 30, 2015, our portfolio consisted of 132 properties, including eight properties held for sale, 14 properties held as investments in unconsolidated joint ventures and developable land, of which 103 are located throughout North America, 23 are located in Europe, three are located in Australia and three are located in Asia. We are diversified in major metropolitan areas where corporate data center and technology tenants are concentrated, including the Boston, Chicago, Dallas, Los Angeles, New York Metro, Northern Virginia, Phoenix, San Francisco and Silicon Valley metropolitan areas in the United States, the Amsterdam, Dublin, London and Paris metropolitan areas in Europe and the Singapore, Sydney, Melbourne, Hong Kong and Osaka metropolitan areas in the Asia Pacific region. The portfolio consists of Internet gateway and corporate data center properties, technology manufacturing properties and regional or national offices of technology companies.

The Operating Partnership was formed on July 21, 2004 in anticipation of Digital Realty Trust, Inc.’s initial public offering (IPO) on November 3, 2004 and commenced operations on that date. As of September 30, 2015, Digital Realty Trust, Inc. owns a 98.0% common interest and a 100.0% preferred interest in the Operating Partnership. As sole general partner of the Operating Partnership, Digital Realty Trust, Inc. has the full, exclusive and complete responsibility for the Operating Partnership’s day-to-day management and control. The limited partners of the Operating Partnership do not have rights to replace Digital Realty Trust, Inc. as the general partner nor do they have participating rights, although they do have certain protective rights.

On October 9, 2015, we completed the acquisition of Telx Holdings, Inc. from private equity firms ABRY Partners and Berkshire Partners. See Note 17 "Subsequent Events" for further discussion of the acquisition.

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Debt of the Operating Partnership (Schedule Of Debt Maturities And Principal Maturities) (Details) - Digital Realty Trust, L.P. $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) extension	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Remainder of 2015	$ 1,768
2016	216,979
2017	1,785,628
2018	593
2019	644
Thereafter	2,760,093
Subtotal	4,765,705
Unamortized discounts	(17,601)
Unamortized net premiums	475
Total Indebtedness	4,748,579	$ 4,673,127
Global revolving credit facility
Debt Instrument [Line Items]
Remainder of 2015	0
2016	0
2017	688,957
2018	0
2019	0
Thereafter	0
Subtotal	688,957
Unamortized discounts	0
Unamortized net premiums	0
Total Indebtedness	$ 688,957
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Unsecured term loan
Debt Instrument [Line Items]
Remainder of 2015	$ 0
2016	0
2017	938,276
2018	0
2019	0
Thereafter	0
Subtotal	938,276
Unamortized discounts	0
Unamortized net premiums	0
Total Indebtedness	$ 938,276
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Prudential Shelf Facility:
Debt Instrument [Line Items]
Remainder of 2015	$ 0
2016	25,000
2017	50,000
2018	0
2019	0
Thereafter	0
Subtotal	75,000	142,000
Unamortized discounts	0
Unamortized net premiums	0
Total Indebtedness	75,000
Senior Notes:
Debt Instrument [Line Items]
Remainder of 2015	0
2016	0
2017	0
2018	0
2019	0
Thereafter	2,758,960
Subtotal	2,758,960
Unamortized discounts	(17,601)	(15,632)
Unamortized net premiums	0
Total Indebtedness	2,741,359
Mortgage Loans
Debt Instrument [Line Items]
Remainder of 2015	1,768
2016	191,979
2017	108,395
2018	593
2019	644
Thereafter	1,133
Subtotal	304,512
Unamortized discounts	0
Unamortized net premiums	475	582
Total Indebtedness	$ 304,987	$ 378,818

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Fair Value Of Instruments (Estimated Fair Value And Carrying Amounts) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 23, 2015	Dec. 31, 2014
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	$ 2,963,204		$ 2,968,073
Mortgage Loans	319,222		399,569
Long-term Debt, Fair Value	4,909,659		4,870,193
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	2,816,359		2,791,758
Mortgage Loans	304,987		378,818
Long-term Debt, Fair Value	4,748,579		4,673,127
Global revolving credit facility | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	688,957		525,951
Global revolving credit facility | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	688,957		525,951
Unsecured term loan | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	938,276		976,600
Unsecured term loan | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	938,276		976,600
Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 17,601		$ 15,632
3.625% notes due 2022 | Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	3.625%
3.95% notes due 2022 | Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	3.95%	3.95%

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Capital And Accumulated Other Comprehensive Income (Partnership Units) (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Digital Realty Trust, L.P.
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Redemption value of common units	$ 170.5	$ 179.0

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Summary Of Significant Accounting Policies (Policy)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Principles Of Consolidation And Basis Of Presentation

(a) Principles of Consolidation and Basis of Presentation

The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated.

The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014.

The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits:

• enhancing investors’ understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

• creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes.

There are a few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how we operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership and a $242.7 million intercompany loan, which was repaid subsequent to the period covered by this report. As a result, Digital Realty Trust, Inc. generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public securities from time to time and guaranteeing certain unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates. Digital Realty Trust, Inc. itself has not issued any indebtedness but guarantees the unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates, as disclosed in these notes.

The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company’s joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units or loaned to Digital Realty Trust, L.P. on a temporary basis prior to contribution in exchange for partnership units, the Operating Partnership generally generates the capital required by the Company’s business primarily through the Operating Partnership’s operations, by the Operating Partnership’s or its affiliates’ direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholders’ equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners’ capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner’s capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels.

To help investors understand the significant differences between the Company and the Operating Partnership, these consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership:

• condensed consolidated face financial statements; and

• the following notes to the condensed consolidated financial statements:

• "Debt of the Company" and "Debt of the Operating Partnership";

• "Income per Share" and "Income per Unit"; and

• "Equity and Accumulated Other Comprehensive Income, Net" and "Capital and Accumulated Other Comprehensive Income".

In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company generally operates the business through the Operating Partnership.

Cash Equivalents

(b) Cash Equivalents

For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of September 30, 2015, cash equivalents consist of investments in money market instruments.

Investment In Unconsolidated Joint Ventures

(c) Investment in Unconsolidated Joint Ventures

The Company’s investment in unconsolidated joint ventures is accounted for using the equity method, whereby the investment is increased for capital contributed and our share of the joint ventures’ net income and decreased by distributions we receive and our share of any losses of the joint ventures.

We amortize the difference between the cost of our investments in unconsolidated joint ventures and the book value of the underlying equity into equity in earnings from unconsolidated affiliates on a straight-line basis consistent with the lives of the underlying assets.

Capitalization Of Costs

(d) Capitalization of Costs

Direct and indirect project costs that are clearly associated with the development of properties are capitalized as incurred. Project costs include all costs directly associated with the development of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development are not capitalized and are charged to expense as incurred.

Capitalization of costs begins when the activities necessary to get the development project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development project is substantially complete and ready for its intended use. Determining when a development project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development project to be substantially complete and ready for its intended use upon receipt of a certificate of occupancy. If and when development of a property is suspended pursuant to a formal change in the planned use of the property, we will evaluate whether the accumulated costs exceed the estimated value of the project and write off the amount of any such excess accumulated costs. For a development project that is suspended for reasons other than a formal change in the planned use of such property, the accumulated project costs are evaluated for impairment consistent with our impairment policies for long-lived assets. Capitalized costs are allocated to the specific components of a project that are benefited.

Share Based Compensation

(e) Share-Based Compensation

The Company measures all share-based compensation awards at fair value on the date they are granted to employees and directors, and recognizes compensation cost, net of forfeitures, over the requisite service period for awards with only a service condition. The estimated fair value of the long-term incentive units and Class D Units (discussed in Note 13 "Incentive Plan") granted by us is being amortized on a straight-line basis over the expected service period.

The fair value of share-based compensation awards that contain a market condition is measured using a Monte Carlo simulation method and not adjusted based on actual achievement of the performance goals.

Income Taxes

(f) Income Taxes

Digital Realty Trust, Inc. has elected to be treated as a real estate investment trust (a “REIT”) for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. generally is not required to pay federal corporate income tax to the extent taxable income is currently distributed to its stockholders. If Digital Realty Trust, Inc. fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.

The Company is subject to foreign, state and local income taxes in the jurisdictions in which it conducts business. The Company’s U.S. consolidated taxable REIT subsidiaries are subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes current and deferred income taxes for its taxable REIT subsidiaries, certain states and non-U.S. jurisdictions, as appropriate.

We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered “more-likely-than-not” to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of September 30, 2015 and December 31, 2014, we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated income statements. For the three and nine months ended September 30, 2015 and 2014, we had no such interest or penalties. The tax year 2012 and thereafter remain open to examination by the major taxing jurisdictions with which the Company files tax returns.

See Note 10 "Income Taxes" for further discussion on income taxes.

Presentation Of Transactional-Based Taxes

(g) Presentation of Transactional-based Taxes

We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis.

Fee Income

(h) Fee Income

Occasionally, customers engage the company for certain services. The nature of these services historically involves property management, construction management, and assistance with financing. The proper revenue recognition of these services can be different, depending on whether the arrangements are service revenue or contractor type revenue.

Service revenues are typically recognized on an equal monthly basis based on the minimum fee to be earned. The monthly amounts could be adjusted depending on if certain performance milestones are met.

Fee income also includes management fees. These fees arise from contractual agreements with entities in which we have a noncontrolling interest. The management fees are recognized as earned under the respective agreements. Management and other fee income related to partially owned entities are recognized to the extent attributable to the unaffiliated interest.

Assets And Liabilities Measured At Fair Value

(i) Assets and Liabilities Measured at Fair Value

Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the lowest level input that is significant would be used to determine the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

Transactions Expense

(j) Transactions Expense

Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and significant transactions.

Management's Estimates

(l) Management’s Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to the valuation of our real estate properties, contingent consideration, accounts receivable and deferred rent receivable, performance-based equity compensation plans, the completeness of accrued liabilities and Digital Realty Trust, Inc.’s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions.

Segment And Geographic Information

(m) Segment and Geographic Information

All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of real estate services provided to them are standardized throughout the portfolio. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment.

Recent Accounting Pronouncements

(o) Recent Accounting Pronouncements

In February 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which provides guidance on the consolidation evaluation for reporting organizations that are required to evaluate whether they should consolidate certain legal entities. In accordance with the guidance, all legal entities are subject to reevaluation under the revised consolidation model. The guidance is effective in the first quarter of 2016, and early adoption is permitted. We are currently evaluating the potential impact of the adoption of ASU 2015-02 on our consolidated financial statements.

On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however, if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. We are currently assessing the impact of the guidance on our consolidated financial statements.

On April 17, 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the associated debt liability.  Currently, debt issuance costs are recorded as an asset and amortization of these deferred financing costs is recorded in interest expense.  Under the new standard, debt issuance costs will continue to be amortized over the life of the debt instrument and amortization will continue to be recorded in interest expense.  The new standard is effective for the Company on January 1, 2016 and will be applied on a retrospective basis.  The Company is currently evaluating ASU 2015-03, and anticipates a change in our presentation only since the standard does not alter the accounting for debt issuance costs.

In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement Period Adjustments (Topic 805). ASU 2015-16 requires an acquirer in a business combination to recognize provisional amounts when measurements were incomplete as of the end of a reporting period as an adjustment in the reporting period in which the provisional amount is determined. Prior to this standard, the acquirer was required to adjust such provisional amounts by restating prior period financial statements. ASU 2015-16 is effective for the annual period ending December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The Company elected to early adopt this standard effective with the interim period beginning July 1, 2015 and this standard did not have a material effect on the consolidated financial statements.

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Incentive Plan (Summary Of Long-Term Incentive Units) (Details) - Long-Term Incentive Units	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Long-Term Incentive Unit Activity [Roll Forward]
Unvested Shares, beginning of period, Shares	314,415
Unvested Shares, Granted, Shares	90,679
Unvested Shares, Vested, Shares	(157,300)
Unvested Shares, Cancelled or expired, Shares	(22,496)
Unvested Shares, end of period, Shares	225,298
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	$ 59.34
Unvested Shares, Granted, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	64.79
Unvested Shares, Vested, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	60.25
Unvested Shares, Cancelled or expired, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	58.13
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	$ 61.03

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Fair Value Of Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Estimated Fair Value And Carrying Amounts

As of September 30, 2015 and December 31, 2014, the aggregate estimated fair value and carrying value of our global revolving credit facility, unsecured term loan, unsecured senior notes and mortgage loans were as follows (in thousands):

	Categorization under the fair value hierarchy	As of September 30, 2015				As of December 31, 2014
		Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value
Global revolving credit facility (1)	Level 2	$	688,957	$	688,957	$	525,951	$	525,951
Unsecured term loan (2)	Level 2	938,276		938,276		976,600		976,600
Unsecured senior notes (3)(4)	Level 2	2,963,204		2,816,359		2,968,073		2,791,758
Mortgage loans (3)	Level 2	319,222		304,987		399,569		378,818
		$	4,909,659	$	4,748,579	$	4,870,193	$	4,673,127

(1) The carrying value of our global revolving credit facility approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings.

(2) The carrying value of our unsecured term loan approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings.

(3) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2020 Notes, 2021 Notes, 3.950% 2022 Notes, 3.625% 2022 Notes, 2023 Notes and 2025 Notes are valued based on quoted market prices.

(4) The carrying value of the 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 2023 Notes and 2025 Notes are net of discount of $17,601 and $15,632 in the aggregate as of September 30, 2015 and December 31, 2014, respectively.

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Equity And Accumulated Other Comprehensive Income, Net

9 Months Ended

Sep. 30, 2015

Equity And Accumulated Other Comprehensive Income, Net [Abstract]

Equity And Accumulated Other Comprehensive Income, Net

Equity and Accumulated Other Comprehensive Income, Net

(a) Equity Distribution Agreements

Digital Realty Trust, Inc. entered into equity distribution agreements in June 2011, which we refer to as the 2011 Equity Distribution Agreements, with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC, or the Agents, under which it can issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Agents as its sales agents. The sales of common stock made under the 2011 Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act. Cumulatively through September 30, 2015, Digital Realty Trust, Inc. has generated net proceeds of approximately $342.7 million from the issuance of approximately 5.7 million common shares under the 2011 Equity Distribution Agreements at an average price of $60.35 per share after payment of approximately $3.5 million of commissions to the sales agents and before offering expenses. No sales were made under the program during the nine months ended September 30, 2015 and 2014. As of September 30, 2015, shares of common stock having an aggregate offering price of $53.8 million remained available for offer and sale under the program.

(b) Forward Equity Sale

On July 20, 2015, Digital Realty Trust, Inc. completed an underwritten public offering of 10,500,000 shares of its common stock, all of which were offered in connection with forward sale agreements it entered into with certain financial institutions acting as forward purchasers. The forward purchasers borrowed and sold 10,500,000 shares of Digital Realty Trust, Inc.’s common stock in the public offering.

Digital Realty Trust, Inc. did not receive any proceeds from the sale of our common stock by the forward purchasers in the public offering. On October 8, 2015, Digital Realty Trust, Inc. physically settled in full the forward sale agreements by issuing an aggregate of 10,500,000 shares of its common stock to the forward counterparties in exchange for net proceeds of approximately $674.1 million. Digital Realty Trust, Inc. used the net proceeds from the physical settlement of the forward sale agreements to fund a portion of the Telx Acquisition.

(c) Redeemable Preferred Stock

6.350% Series I Cumulative Redeemable Preferred Stock

On August 24, 2015, Digital Realty Trust, Inc. issued 10,000,000 shares of its 6.350% series I cumulative redeemable preferred stock (the "Series I Preferred Stock") for net proceeds of approximately $241.7 million. We used the net proceeds from the offering to fund a portion of the aggregate purchase price for the Telx Acquisition. Prior to the closing of the Telx Acquisition, we loaned the net proceeds from the offering to the Operating Partnership. Dividends are cumulative on the Series I Preferred Stock from the date of original issuance in the amount of $1.5875 per share each year, which is equivalent to 6.350% of the $25.00 liquidation preference per share. Dividends on the Series I Preferred Stock are payable quarterly in arrears. The first dividend payable on the Series I Preferred Stock on December 31, 2015 will be a pro rata dividend from and including the original issue date to and including December 31, 2015 in the amount of $0.56003 per share. The Series I Preferred Stock does not have a stated maturity date and is not subject to any sinking fund or mandatory redemption provisions. Upon liquidation, dissolution or winding up, the Series I Preferred Stock will rank senior to Digital Realty Trust, Inc. common stock and rank on parity with Digital Realty Trust, Inc.’s series E cumulative redeemable preferred stock, series F cumulative redeemable preferred stock, series G cumulative redeemable preferred stock and series H cumulative redeemable preferred stock with respect to the payment of distributions and other amounts. Digital Realty Trust, Inc. is not allowed to redeem the Series I Preferred Stock before August 24, 2020, except in limited circumstances to preserve its status as a REIT. On or after August 24, 2020, Digital Realty Trust, Inc. may, at its option, redeem the Series I Preferred Stock, in whole or in part, at any time or from time to time, for cash at a redemption price of $25.00 per share, plus all accrued and unpaid dividends on such Series I Preferred Stock up to but excluding the redemption date. Holders of the Series I Preferred Stock generally have no voting rights except for limited voting rights if Digital Realty Trust, Inc. fails to pay dividends for six or more quarterly periods (whether or not consecutive) and in certain other circumstances. Upon the occurrence of specified changes of control, as a result of which neither Digital Realty Trust, Inc.’s common stock nor the common securities of the acquiring or surviving entity (or American Depositary Receipts representing such securities) is listed on the New York Stock Exchange, the NYSE MKT, LLC or the NASDAQ Stock Market or listed or quoted on a successor exchange or quotation system, each holder of Series I Preferred Stock will have the right (unless, prior to the change of control conversion date specified in the Articles Supplementary governing the Series I Preferred Stock, Digital Realty Trust, Inc. has provided or provides notice of its election to redeem the Series I Preferred Stock) to convert some or all of the Series I Preferred Stock held by it into a number of shares of Digital Realty Trust, Inc.’s common stock per share of Series I Preferred Stock to be converted equal to the lesser of:

the quotient obtained by dividing (i) the sum of the $25.00 liquidation preference plus the amount of any accrued and unpaid dividends to, but not including, the change of control conversion date (unless the change of control conversion date is after a record date for a Series I Preferred Stock dividend payment and prior to the corresponding Series I Preferred Stock dividend payment date, in which case no additional amount for such accrued and unpaid dividend will be included in this sum) by (ii) the common stock price specified in the Articles Supplementary governing the Series I Preferred Stock; and 0.76231, or the share cap, subject to certain adjustments;

subject, in each case, to provisions for the receipt of alternative consideration as described in the Articles Supplementary governing the Series I Preferred Stock. Except in connection with specified change of control transactions, the Series I Preferred Stock is not convertible into or exchangeable for any other property or securities of Digital Realty Trust, Inc.

(d) Noncontrolling Interests in Operating Partnership

Noncontrolling interests in the Operating Partnership relate to the interests that are not owned by Digital Realty Trust, Inc. The following table shows the ownership interests in the Operating Partnership as of September 30, 2015 and December 31, 2014:

	September 30, 2015			December 31, 2014
	Number of units	Percentage of total		Number of units	Percentage of total
Digital Realty Trust, Inc.	135,843,684	98.0	%	135,626,255	97.8	%
Noncontrolling interests consist of:
Common units held by third parties	1,421,314	1.0		1,463,814	1.1
Incentive units held by employees and directors (see Note 13)	1,414,299	1.0		1,549,847	1.1
	138,679,297	100.0	%	138,639,916	100.0	%

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of Digital Realty Trust, Inc. common stock at the time of redemption. Alternatively, Digital Realty Trust, Inc. may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, Digital Realty Trust, Inc. evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the noncontrolling Operating Partnership common and incentive units. Based on the results of this analysis, we concluded that the common and incentive Operating Partnership units met the criteria to be classified within equity.

The redemption value of the noncontrolling Operating Partnership common units and the vested incentive units was approximately $170.5 million and $179.0 million based on the closing market price of Digital Realty Trust, Inc. common stock on September 30, 2015 and December 31, 2014, respectively.

The following table shows activity for the noncontrolling interests in the Operating Partnership for the nine months ended September 30, 2015:

	Common Units		Incentive Units		Total
As of December 31, 2014	1,463,814		1,549,847		3,013,661
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1)	(42,500	)	—		(42,500	)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1)	—		(76,087	)	(76,087	)
Cancellation of incentive units held by employees and directors	—		(150,140	)	(150,140	)
Grant of incentive units to employees and directors	—		90,679		90,679
As of September 30, 2015	1,421,314		1,414,299		2,835,613

(1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.

(e) Dividends

We have declared and paid the following dividends on our common and preferred stock for the nine months ended September 30, 2015 (in thousands, except per share data):

Date dividend declared	Dividend payment date	Series E Preferred Stock		Series F Preferred Stock		Series G Preferred Stock		Series H Preferred Stock		Common Stock
February 25, 2015	March 31, 2015	$	5,031	$	3,023	$	3,672	$	6,730	$	115,419
May 12, 2015	June 30, 2015	5,031		3,023		3,672		6,730		115,458
August 11, 2015	September 30, 2015	5,031		3,023		3,672		6,730		115,454
		$	15,093	$	9,069	$	11,016	$	20,190	$	346,331
Annual rate of dividend per share		$	1.750	$	1.656	$	1.469	$	1.844	$	3.400

Distributions out of Digital Realty Trust, Inc.’s current or accumulated earnings and profits are generally classified as dividends whereas distributions in excess of its current and accumulated earnings and profits, to the extent of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock, are generally classified as a return of capital. Distributions in excess of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock are generally characterized as capital gain. Cash provided by operating activities has generally been sufficient to fund all distributions; however, in the future we may also need to utilize borrowings under the global revolving credit facility to fund all or a portion of distributions.

(f) Accumulated Other Comprehensive Income, Net

The accumulated balances for each item within other comprehensive income, net are as follows (in thousands):

	Foreign currency translation adjustments				Cash flow hedge adjustments			Accumulated other comprehensive income (loss), net
Balance as of December 31, 2014	$	(39,567	)		$	(5,479	)	$	(45,046	)
Net current period change	(40,688		)	(1)	(4,290		)	(44,978		)
Reclassification to interest expense from interest rate swaps	—				2,036			2,036
Balance as of September 30, 2015	$	(80,255	)		$	(7,733	)	$	(87,988	)

(1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.