Digital Realty Trust (DLR) 10-Q 6 Aug 15 2015 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Registrant Name	Digital Realty Trust, Inc.
Entity Central Index Key	1,297,996
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		135,833,978
Digital Realty Trust, L.P.
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Registrant Name	Digital Realty Trust, L.P.
Entity Central Index Key	1,494,877
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Properties:
Land	$ 645,918	$ 671,602
Acquired ground leases	13,225	12,196
Buildings and improvements	8,938,019	8,823,814
Tenant improvements	543,964	475,000
Total investments in properties	10,141,126	9,982,612
Accumulated depreciation and amortization	(2,033,289)	(1,874,054)
Net investments in properties	8,107,837	8,108,558
Investment in unconsolidated joint ventures	103,410	94,729
Net investments in real estate	8,211,247	8,203,287
Cash and cash equivalents	59,152	41,321
Accounts and other receivables, net of allowance for doubtful accounts	126,734	135,931
Deferred rent	467,262	447,643
Acquired above-market leases, net	33,936	38,605
Acquired in-place lease value and deferred leasing costs, net	424,229	456,962
Deferred financing costs, net	30,203	30,821
Restricted cash	9,394	11,555
Assets held for sale	171,990	120,471
Other assets	51,862	40,188
Total assets	9,586,009	9,526,784
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	2,856,408	2,791,758
Mortgage loans, including premiums	374,307	378,818
Accounts payable and other accrued liabilities	516,232	605,923
Accrued dividends and distributions	0	115,019
Acquired below-market leases, net	94,312	104,235
Security deposits and prepaid rents	109,005	108,478
Obligations associated with assets held for sale	7,441	5,764
Total liabilities	$ 5,695,816	$ 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, 135,832,492 and 135,626,255 shares issued and outstanding as of June 30, 2015 and December 31, 2014, respectively	$ 1,351	$ 1,349
Additional paid-in capital	3,974,398	3,970,439
Accumulated dividends in excess of earnings	(1,108,701)	(1,096,607)
Accumulated other comprehensive (loss) income	(67,324)	(45,046)
Total stockholders’ equity	3,847,845	3,878,256
Noncontrolling Interests:
Noncontrolling interests in operating partnership	35,577	29,191
Noncontrolling interests in consolidated joint ventures	6,771	6,791
Total noncontrolling interests	42,348	35,982
Total equity	3,890,193	3,914,238
Total liabilities and equity/capital	9,586,009	9,526,784
Digital Realty Trust, L.P.
Properties:
Land	645,918	671,602
Acquired ground leases	13,225	12,196
Buildings and improvements	8,938,019	8,823,814
Tenant improvements	543,964	475,000
Total investments in properties	10,141,126	9,982,612
Accumulated depreciation and amortization	(2,033,289)	(1,874,054)
Net investments in properties	8,107,837	8,108,558
Investment in unconsolidated joint ventures	103,410	94,729
Net investments in real estate	8,211,247	8,203,287
Cash and cash equivalents	59,152	41,321
Accounts and other receivables, net of allowance for doubtful accounts	126,734	135,931
Deferred rent	467,262	447,643
Acquired above-market leases, net	33,936	38,605
Acquired in-place lease value and deferred leasing costs, net	424,229	456,962
Deferred financing costs, net	30,203	30,821
Restricted cash	9,394	11,555
Assets held for sale	171,990	120,471
Other assets	51,862	40,188
Total assets	9,586,009	9,526,784
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	2,856,408	2,791,758
Mortgage loans, including premiums	374,307	378,818
Accounts payable and other accrued liabilities	516,232	605,923
Accrued dividends and distributions	0	115,019
Acquired below-market leases, net	94,312	104,235
Security deposits and prepaid rents	109,005	108,478
Obligations associated with assets held for sale	7,441	5,764
Total liabilities	$ 5,695,816	$ 5,612,546
Commitments and contingencies
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
135,832,492 and 135,626,255 units issued and outstanding as of June 30, 2015 and December 31, 2014, respectively	$ 2,867,048	$ 2,875,181
Limited partners, 1,425,314 and 1,463,814 common units, 1,126,429 and 1,170,610 profits interest units and 379,237 and 379,237 class C units outstanding as of June 30, 2015 and December 31, 2014, respectively	39,398	32,578
Accumulated other comprehensive (loss) income	(71,145)	(48,433)
Total partners’ capital	3,883,422	3,907,447
Noncontrolling Interests:
Noncontrolling interests in consolidated joint ventures	6,771	6,791
Total capital	3,890,193	3,914,238
Total liabilities and equity/capital	9,586,009	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
Global revolving credit facility
LIABILITIES AND EQUITY
Line of credit	777,013	525,951
Global revolving credit facility | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	777,013	525,951
Unsecured term loan
LIABILITIES AND EQUITY
Line of credit	961,098	976,600
Unsecured term loan | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	$ 961,098	$ 976,600

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Accounts and other receivables, net of allowance for doubtful accounts	$ 6,263,000	$ 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	135,832,492	135,626,255
Common Stock, Shares, Outstanding	135,832,492	135,626,255
Series E Preferred Units
Preferred Stock, dividend rate	7.00%	7.00%
Preferred Stock, liquidation preference value	$ 287,500	$ 287,500
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	$ 182,500
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	$ 250,000
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	$ 365,000
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
Digital Realty Trust, L.P.
Accounts and other receivables, net of allowance for doubtful accounts	$ 6,263,000	$ 6,302,000
Common Units, issued	135,832,492	135,626,255
Common Units, outstanding	135,832,492	135,626,255
Limited Partners, common units	1,425,314	1,463,814
Limited Partners, profits interest units	1,126,429	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	$ 25
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	$ 25
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	$ 25
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	$ 25
Preferred Units, issued	14,600,000	14,600,000
Preferred Units, outstanding	14,600,000	14,600,000

Condensed Consolidated Income S

Condensed Consolidated Income Statements - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating Revenues:
Rental	$ 330,676	$ 313,420	$ 649,842	$ 619,206
Tenant reimbursements	87,572	85,687	173,401	169,308
Fee income	1,549	1,466	3,163	2,649
Other	498	873	498	873
Total operating revenues	420,295	401,446	826,904	792,036
Operating Expenses:
Rental property operating and maintenance	129,539	126,796	254,102	244,692
Property taxes	20,900	20,595	44,163	42,720
Insurance	2,154	1,896	4,309	4,318
Change in fair value of contingent consideration	352	766	(42,682)	(2,637)
Depreciation and amortization	131,524	137,092	260,597	267,712
General and administrative	25,613	20,321	46,807	50,999
Transactions	3,166	755	3,259	836
Other	(6)	772	(22)	936
Total operating expenses	313,242	308,993	570,533	609,576
Operating income	107,053	92,453	256,371	182,460
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	3,383	3,477	8,001	6,058
Gain on sale of property	76,669	15,945	94,489	15,945
Gain on contribution of property to unconsolidated joint venture	0	0	0	1,906
Interest and other income (expense)	(231)	(83)	(2,521)	1,644
Interest expense	(46,114)	(49,146)	(91,580)	(96,520)
Tax expense	(2,615)	(1,021)	(4,290)	(2,859)
Loss from early extinguishment of debt	(148)	(293)	(148)	(585)
Net income	137,997	61,332	260,322	108,049
Net income attributable to noncontrolling interests	(2,486)	(993)	(4,628)	(1,798)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	135,511	60,339	255,694	106,251
Preferred stock/unit dividends/distributions	(18,456)	(18,829)	(36,911)	(30,555)
Net income available to common stock/unitholders	$ 117,055	$ 41,510	$ 218,783	$ 75,696
Net income per share/unit available to common stockholders/unitholders:
Basic ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58
Diluted ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58
Weighted average common shares/units outstanding:
Weighted average shares/units outstanding-basic (shares)	135,810,060	133,802,622	135,757,584	131,183,857
Weighted average shares/units outstanding-diluted (shares)	136,499,004	133,977,885	136,260,995	131,320,547
Digital Realty Trust, L.P.
Operating Revenues:
Rental	$ 330,676	$ 313,420	$ 649,842	$ 619,206
Tenant reimbursements	87,572	85,687	173,401	169,308
Fee income	1,549	1,466	3,163	2,649
Other	498	873	498	873
Total operating revenues	420,295	401,446	826,904	792,036
Operating Expenses:
Rental property operating and maintenance	129,539	126,796	254,102	244,692
Property taxes	20,900	20,595	44,163	42,720
Insurance	2,154	1,896	4,309	4,318
Change in fair value of contingent consideration	352	766	(42,682)	(2,637)
Depreciation and amortization	131,524	137,092	260,597	267,712
General and administrative	25,613	20,321	46,807	50,999
Transactions	3,166	755	3,259	836
Other	(6)	772	(22)	936
Total operating expenses	313,242	308,993	570,533	609,576
Operating income	107,053	92,453	256,371	182,460
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	3,383	3,477	8,001	6,058
Gain on sale of property	76,669	15,945	94,489	15,945
Gain on contribution of property to unconsolidated joint venture	0	0	0	1,906
Interest and other income (expense)	(231)	(83)	(2,521)	1,644
Interest expense	(46,114)	(49,146)	(91,580)	(96,520)
Tax expense	(2,615)	(1,021)	(4,290)	(2,859)
Loss from early extinguishment of debt	(148)	(293)	(148)	(585)
Net income	137,997	61,332	260,322	108,049
Net income attributable to noncontrolling interests	(109)	(120)	(225)	(232)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	137,888	61,212	260,097	107,817
Preferred stock/unit dividends/distributions	(18,456)	(18,829)	(36,911)	(30,555)
Net income available to common stock/unitholders	$ 119,432	$ 42,383	$ 223,186	$ 77,262
Net income per share/unit available to common stockholders/unitholders:
Basic ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58
Diluted ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58
Weighted average common shares/units outstanding:
Weighted average shares/units outstanding-basic (shares)	138,567,526	136,615,338	138,487,704	133,894,119
Weighted average shares/units outstanding-diluted (shares)	139,256,470	136,790,601	138,991,115	134,030,809

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 137,997	$ 61,332	$ 260,322	$ 108,049
Other comprehensive income:
Foreign currency translation adjustments	23,468	4,921	(22,375)	8,740
Increase (decrease) in fair value of interest rate swaps	577	(4,739)	(1,840)	(6,082)
Reclassification to interest expense from interest rate swaps	685	854	1,503	1,700
Comprehensive income	162,727	62,368	237,610	112,407
Comprehensive income attributable to noncontrolling interests	(2,978)	(1,014)	(4,194)	(1,885)
Comprehensive income attributable to Digital Realty Trust, Inc.	159,749	61,354	233,416	110,522
Digital Realty Trust, L.P.
Net income	137,997	61,332	260,322	108,049
Other comprehensive income:
Foreign currency translation adjustments	23,468	4,921	(22,375)	8,740
Increase (decrease) in fair value of interest rate swaps	577	(4,739)	(1,840)	(6,082)
Reclassification to interest expense from interest rate swaps	685	854	1,503	1,700
Comprehensive income	$ 162,727	$ 62,368	$ 237,610	$ 112,407

Condensed Consolidated Stateme6

Condensed Consolidated Statements Of Equity - 6 months ended Jun. 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	1,310			1,312	(1,312)		(1,312)
Conversion of units to common stock (shares)			114,587
Issuance of unvested restricted stock, net of forfeitures (shares)			79,689
Common stock offering costs	(273)			(273)			(273)
Exercise of stock options	$ 493			493			493
Exercise of stock options (shares)	11,961		11,961
Amortization of unearned compensation on share-based awards	$ 11,031			11,031			11,031
Reclassification of vested share-based awards				(8,602)			(8,602)	8,602		8,602
Dividends declared and paid on preferred stock	(36,911)				(36,911)		(36,911)
Dividends and distributions on common stock and common and incentive units	(235,750)				(230,877)		(230,877)	(4,873)		(4,873)
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions	(245)								(245)	(245)
Net income	260,322				255,694		255,694	4,403	225	4,628
Other comprehensive income—foreign currency translation adjustments	(22,375)					(21,947)	(21,947)	(428)		(428)
Other comprehensive loss—fair value of interest rate swaps	(1,840)					(1,804)	(1,804)	(36)		(36)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense	1,503					1,473	1,473	30		30
Shares, Outstanding, Ending Balance at Jun. 30, 2015			135,832,492
Balance as of June 30, 2015 at Jun. 30, 2015	$ 3,890,193	$ 1,048,121	$ 1,351	$ 3,974,398	$ (1,108,701)	$ (67,324)	$ 3,847,845	$ 35,577	$ 6,771	$ 42,348

Consolidated Statements Of Capi

Consolidated Statements Of Capital - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015
Balance (units)		135,626,255
Conversion of limited partner common units to general partner common units		$ 1,312
Amortization of unearned compensation on share-based awards		11,031
Net income	$ 137,997	260,322
Other comprehensive income—foreign currency translation adjustments	23,468	(22,375)
Other comprehensive loss—fair value of interest rate swaps	577	(1,840)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense	$ 685	$ 1,503
Balance (units)	135,832,492	135,832,492
Digital Realty Trust, L.P.
Balance as of December 31, 2014		$ 3,914,238
Common stock offering costs		(273)
Issuance of common units in connection with the exercise of stock options		493
Amortization of unearned compensation on share-based awards		11,031
Distributions		(272,661)
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions		(245)
Net income	$ 137,997	260,322
Other comprehensive income—foreign currency translation adjustments	23,468	(22,375)
Other comprehensive loss—fair value of interest rate swaps	577	(1,840)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense	685	1,503
Balance as of June 30, 2015	3,890,193	3,890,193
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		(22,375)
Other comprehensive loss—fair value of interest rate swaps		(1,840)
Other comprehensive income—reclassification of accumulated other comprehensive loss to interest expense		1,503
Balance as of June 30, 2015	(71,145)	(71,145)
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		(245)
Net income		225
Balance as of June 30, 2015	6,771	6,771
General Partner | Preferred Units | Digital Realty Trust, L.P.
Balance as of December 31, 2014		$ 1,048,121
Balance (units)		43,400,000
Distributions		$ (36,911)
Net income		36,911
Balance as of June 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		$ 1,312
Conversion of limited partner common units to general partner common units (units)		114,587
Issuance of unvested restricted common units, net of forfeitures (units)		79,689
Common stock offering costs		$ (273)
Issuance of common units in connection with the exercise of stock options		$ 493
Issuance of common units in connection with the exercise of stock options (units)		11,961
Amortization of unearned compensation on share-based awards		$ 11,031
Reclassification of vested share-based awards		(8,602)
Distributions		(230,877)
Net income		218,783
Balance as of June 30, 2015	$ 2,867,048	$ 2,867,048
Balance (units)	135,832,492	135,832,492
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		$ (1,312)
Conversion of limited partner common units to general partner common units (units)		(114,587)
Issuance of common units, net of forfeitures (units)		31,906
Reclassification of vested share-based awards		$ 8,602
Distributions		(4,873)
Net income		4,403
Balance as of June 30, 2015	$ 39,398	$ 39,398
Balance (units)	2,930,980	2,930,980

Condensed Consolidated Stateme8

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 260,322	$ 108,049
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of properties	(94,489)	(15,945)
Gain on contribution of investment property to unconsolidated joint venture	0	(1,906)
Equity in earnings of unconsolidated joint ventures	(8,001)	(6,058)
Change in fair value of accrued contingent consideration	(42,682)	(2,637)
Distributions from unconsolidated joint ventures	6,898	4,603
Write-off of net assets due to early lease terminations	(59)	651
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases	226,767	225,025
Amortization of share-based unearned compensation	7,483	12,640
Allowance for doubtful accounts	(39)	954
Amortization of deferred financing costs	4,285	4,487
Loss on early extinguishment of debt	148	585
Amortization of debt discount/premium	915	864
Amortization of acquired in-place lease value and deferred leasing costs	33,830	42,687
Amortization of acquired above-market leases and acquired below-market leases, net	(4,683)	(5,340)
Changes in assets and liabilities:
Restricted cash	566	1,922
Accounts and other receivables	4,826	20,583
Deferred rent	(27,868)	(41,283)
Deferred leasing costs	(4,675)	(7,663)
Other assets	(15,429)	(13,328)
Accounts payable and other accrued liabilities	4,344	3,718
Security deposits and prepaid rents	2,692	(17,344)
Net cash provided by operating activities	355,151	315,264
Cash flows from investing activities:
Acquisitions of real estate	(48,424)	0
Proceeds from sale of properties, net	185,565	37,945
Proceeds from contribution of investment properties to unconsolidated joint ventures	0	11,408
Investment in unconsolidated joint ventures	(7,547)	(20,627)
Investment in equity securities	0	(3)
Receipt of value added tax refund	13,422	4,956
Refundable value added tax paid	(2,771)	(3,816)
Change in restricted cash	1,484	(1,340)
Improvements to and advances for investments in real estate	(380,148)	(431,217)
Improvement advances to tenants	(17,881)	(7,091)
Collection of advances from tenants for improvements	14,441	5,969
Net cash used in investing activities	(241,859)	(403,816)
Cash flows from financing activities:
Borrowings on revolving credit facility	1,291,832	677,264
Repayments on revolving credit facility	(1,032,798)	(1,033,838)
Principal payments on unsecured notes	(374,927)	0
Repayments on other unsecured loans	(67,000)	0
Principal payments on mortgage loans	(4,440)	(6,349)
Earnout payments related to acquisitions	(12,985)	(5,706)
Change in restricted cash	113	51
Payment of loan fees and costs	(3,741)	(5,311)
Capital distributions paid to noncontrolling interests in consolidated joint ventures, net	(245)	(274)
Gross proceeds from the issuance of preferred stock	0	365,000
Common stock offering costs paid	(273)	(93)
Preferred stock offering costs paid	0	(11,622)
Proceeds from exercise of stock options	493	237
Payment of dividends/distributions to preferred stockholders/unitholders	(36,911)	(30,555)
Payment of dividends/distributions to common unit/stockholders and distributions to noncontrolling interests in operating partnership	(350,769)	(326,772)
Net cash (used in) provided by financing activities	(95,461)	112,670
Net increase (decrease) in cash and cash equivalents	17,831	24,118
Cash and cash equivalents at beginning of period	41,321	56,808
Cash and cash equivalents at end of period	59,152	80,926
Supplemental disclosure of cash flow information:
Cash paid for interest	101,036	98,240
Cash paid for income taxes	1,785	2,800
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	(22,375)	8,740
(Decrease) increase in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps	(1,840)	(6,082)
Noncontrolling interests in operating partnership redeemed for or converted to shares of common stock	1,312	191
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses	134,625	191,148
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	0
Cash paid for acquisition of real estate	48,424	0
Digital Realty Trust, L.P.
Cash flows from operating activities:
Net income	260,322	108,049
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of properties	(94,489)	(15,945)
Gain on contribution of investment property to unconsolidated joint venture	0	(1,906)
Equity in earnings of unconsolidated joint ventures	(8,001)	(6,058)
Change in fair value of accrued contingent consideration	(42,682)	(2,637)
Distributions from unconsolidated joint ventures	6,898	4,603
Write-off of net assets due to early lease terminations	(59)	651
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases	226,767	225,025
Amortization of share-based unearned compensation	7,483	12,640
Allowance for doubtful accounts	(39)	954
Amortization of deferred financing costs	4,285	4,487
Loss on early extinguishment of debt	148	585
Amortization of debt discount/premium	915	864
Amortization of acquired in-place lease value and deferred leasing costs	33,830	42,687
Amortization of acquired above-market leases and acquired below-market leases, net	(4,683)	(5,340)
Changes in assets and liabilities:
Restricted cash	566	1,922
Accounts and other receivables	4,826	20,583
Deferred rent	(27,868)	(41,283)
Deferred leasing costs	(4,675)	(7,663)
Other assets	(15,429)	(13,328)
Accounts payable and other accrued liabilities	4,344	3,718
Security deposits and prepaid rents	2,692	(17,344)
Net cash provided by operating activities	355,151	315,264
Cash flows from investing activities:
Acquisitions of real estate	(48,424)	0
Proceeds from sale of properties, net	185,565	37,945
Proceeds from contribution of investment properties to unconsolidated joint ventures	0	11,408
Investment in unconsolidated joint ventures	(7,547)	(20,627)
Investment in equity securities	0	(3)
Receipt of value added tax refund	13,422	4,956
Refundable value added tax paid	(2,771)	(3,816)
Change in restricted cash	1,484	(1,340)
Improvements to and advances for investments in real estate	(380,148)	(431,217)
Improvement advances to tenants	(17,881)	(7,091)
Collection of advances from tenants for improvements	14,441	5,969
Net cash used in investing activities	(241,859)	(403,816)
Cash flows from financing activities:
Borrowings on revolving credit facility	1,291,832	677,264
Repayments on revolving credit facility	(1,032,798)	(1,033,838)
Principal payments on unsecured notes	(374,927)	0
Repayments on other unsecured loans	(67,000)	0
Principal payments on mortgage loans	(4,440)	(6,349)
Principal repayments on exchangeable senior debentures	0	(5,234)
Earnout payments related to acquisitions	(12,985)	(5,706)
Change in restricted cash	113	51
Payment of loan fees and costs	(3,741)	(5,311)
Capital distributions paid to noncontrolling interests in consolidated joint ventures, net	(245)	(274)
General partner contributions, net	220	353,522
Payment of dividends/distributions to preferred stockholders/unitholders	(36,911)	(30,555)
Payment of dividends/distributions to common unit/stockholders and distributions to noncontrolling interests in operating partnership	(350,769)	(326,772)
Net cash (used in) provided by financing activities	(95,461)	112,670
Net increase (decrease) in cash and cash equivalents	17,831	24,118
Cash and cash equivalents at beginning of period	41,321	56,808
Cash and cash equivalents at end of period	59,152	80,926
Supplemental disclosure of cash flow information:
Cash paid for interest	101,036	98,240
Cash paid for income taxes	1,785	2,800
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	(22,375)	8,740
(Decrease) increase in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps	(1,840)	(6,082)
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses	134,625	191,148
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	0
Cash paid for acquisition of real estate	48,424	0
3.950% notes due 2022
Cash flows from financing activities:
Repayments on other unsecured loans	496,190	0
3.950% notes due 2022 | Digital Realty Trust, L.P.
Cash flows from financing activities:
Repayments on other unsecured loans	496,190	0
4.750% notes due 2023
Cash flows from financing activities:
Repayments on other unsecured loans	0	495,872
4.750% notes due 2023 | Digital Realty Trust, L.P.
Cash flows from financing activities:
Repayments on other unsecured loans	$ 0	$ 495,872

Condensed Consolidated Stateme9

Condensed Consolidated Statements Of Cash Flows (Parenthetical) - Senior Notes:	Jun. 30, 2015	Jun. 23, 2015
3.950% notes due 2022
Stated interest rate	3.95%	3.95%
4.750% notes due 2023
Stated interest rate	4.75%
Digital Realty Trust, L.P. | 3.950% notes due 2022
Stated interest rate	3.95%
Digital Realty Trust, L.P. | 4.750% notes due 2023
Stated interest rate	4.75%

Organization And Description Of

Organization And Description Of Business	6 Months Ended
	Jun. 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 June 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 June 30, 2015 , Digital Realty Trust, Inc. owns a 97.9% 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.

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	6 Months Ended
	Jun. 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. 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. Digital Realty Trust, Inc. itself has not issued any indebtedness but guarantees the unsecured debt of the Operating Partnership and certain of its subsidiaries, 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, the Operating Partnership generates the capital required by the Company’s business primarily through the Operating Partnership’s operations, by the Operating Partnership’s 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 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 June 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. During the three months ended June 30, 2015 and 2014 , we capitalized interest of approximately $3.2 million and $4.9 million , respectively, and $7.5 million and $10.2 million during the six months ended June 30, 2015 and 2014 , respectively. During the three months ended June 30, 2015 and 2014 , we capitalized amounts relating to compensation and other overhead expense of employees direct and incremental to construction and successful leasing activities of approximately $14.0 million and $14.1 million , respectively, and $28.3 million and $27.9 million during the six months ended June 30, 2015 and 2014 , respectively. Capitalized leasing costs of approximately $26.4 million and $21.8 million are included in improvements to and advances for investments in real estate in cash flows from investing activities in the condensed consolidated statements of cash flows for the six months ended June 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 June 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 six months ended June 30, 2015 and 2014 , we had no such interest or penalties. The tax year 2011 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 $322.4 million and $305.5 million and outside the United States were $97.9 million and $95.9 million for the three months ended June 30, 2015 and 2014, respectively. Operating revenues from properties in the United States were $637.1 million and $600.7 million and outside the United States were $189.8 million and $191.3 million for the six months ended June 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 $2.7 billion and $2.7 billion as of June 30, 2015 and December 31, 2014, respectively. Operating revenues from properties located in the United Kingdom were $54.8 million and $54.5 million , or 13.0% and 13.6% of total operating revenues, for the three months ended June 30, 2015 and 2014, respectively. Operating revenues from properties located in the United Kingdom were $104.9 million and $109.4 million , or 12.7% and 13.8% of total operating revenues, for the six months ended June 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 $1.8 billion and $1.7 billion , or 21.7% and 21.3% of total long-lived assets, as of June 30, 2015 and December 31, 2014, respectively. No other foreign country comprised more than 10% of total long-lived assets as of June 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 six months ended June 30, 2014 , $0.1 million and $0.3 million , respectively, were reclassified from rental property operating and maintenance expense to other expense. (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.

Investments In Real Estate

Investments In Real Estate	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Investments In Real Estate	Investments in Real Estate We acquired the following real estate properties during the six months ended June 30, 2015 : Location Metropolitan Area Date Acquired Amount (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 six months ended June 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 $ 10.2 3300 East Birch Street Los Angeles March 31, 2015 14.2 7.6 833 Chestnut Street Philadelphia April 30, 2015 160.8 (1) 76.7 $ 206.1 $ 94.5 (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 Midwest, Northeast 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 June 30, 2015 , three of these properties met the criteria to be classified as held for sale. As of June 30, 2015 , the Company had taken the necessary actions to conclude that five properties (in addition to the 3 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 June 30, 2015 , these eight properties had an aggregate carrying value of $172.0 million within total assets and $7.4 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.

Investment In Unconsolidated Jo

Investment In Unconsolidated Joint Ventures	6 Months Ended
	Jun. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Investment In Unconsolidated Joint Ventures	Investment in Unconsolidated Joint Ventures As of June 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 June 30, 2015 and December 31, 2014 and for the six months ended June 30, 2015 and 2014 (unaudited, in thousands): As of June 30, 2015 Six Months Ended June 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 $ 768,673 $ 943,900 $ 460,789 $ 559,118 $ 384,782 $ 63,976 $ (17,718 ) $ 46,258 $ 18,360 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 103,410 $ 8,001 As of December 31, 2014 Six Months Ended June 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 $ 46,188 $ (10,940 ) $ 35,248 $ 14,896 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 94,729 $ 6,058 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 million five -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. Two one -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.

Acquired Intangible Assets And

Acquired Intangible Assets And Liabilities	6 Months Ended
	Jun. 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 June 30, 2015 and December 31, 2014 . Balance as of (Amounts in thousands) June 30, 2015 December 31, 2014 Acquired in-place lease value: Gross amount $ 657,024 $ 680,419 Accumulated amortization (451,744 ) (452,739 ) Net $ 205,280 $ 227,680 Acquired above-market leases: Gross amount $ 120,553 $ 126,677 Accumulated amortization (86,617 ) (88,072 ) Net $ 33,936 $ 38,605 Acquired below-market leases: Gross amount $ 280,090 $ 282,670 Accumulated amortization (185,778 ) (178,435 ) Net $ 94,312 $ 104,235 Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase to rental revenues of $2.4 million and $2.6 million for the three months ended June 30, 2015 and 2014 , respectively, and $4.7 million and $5.3 million for the six months ended June 30, 2015 and 2014 , respectively. The expected average remaining lives for acquired below-market leases and acquired above-market leases is 5.9 years and 3.5 years, respectively, as of June 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 July 1, 2015 is as follows: (Amounts in thousands) Remainder of 2015 $ 4,296 2016 7,485 2017 6,054 2018 4,443 2019 4,545 Thereafter 33,553 Total $ 60,376 Amortization of acquired in-place lease value (a component of depreciation and amortization expense) was $10.5 million and $18.4 million for the three months ended June 30, 2015 and 2014 , respectively, and $22.1 million and $33.4 million for the six months ended June 30, 2015 and 2014 , respectively. The expected average amortization period for acquired in-place lease value is 6.0 years as of June 30, 2015 . The weighted average remaining contractual life for acquired leases excluding renewals or extensions is 4.6 years as of June 30, 2015 . Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing July 1, 2015 is as follows: (Amounts in thousands) Remainder of 2015 $ 18,617 2016 32,302 2017 27,768 2018 25,455 2019 22,932 Thereafter 78,206 Total $ 205,280

Debt of the Company

Debt of the Company	6 Months Ended
	Jun. 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 ). 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.

Debt of the Operating Partnersh

Debt of the Operating Partnership	6 Months Ended
	Jun. 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 June 30, 2015 and December 31, 2014 is as follows (in thousands): Indebtedness Interest Rate at June 30, 2015 Maturity Date Principal Outstanding June 30, 2015 Principal Outstanding December 31, 2014 Global revolving credit facility Various (1) Nov 3, 2017 $ 777,013 (2) $ 525,951 (2) Unsecured term loan Various (3)(6) Apr 16, 2017 961,098 (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: 4.500% 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 5.250% notes due 2021 5.250% Mar 15, 2021 400,000 400,000 3.950% 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 4.750% notes due 2023 4.750% Oct 13, 2023 471,360 (10) 467,310 (10) 4.250% notes due 2025 4.250% Jan 17, 2025 628,480 (10) 623,080 (10) Unamortized discounts (18,432 ) (15,632 ) Total senior notes, net of discount 2,781,408 2,649,758 Total unsecured senior notes, net of discount 2,856,408 2,791,758 Indebtedness Interest Rate at June 30, 2015 Maturity Date Principal Outstanding June 30, 2015 Principal Outstanding December 31, 2014 Mortgage loans: 200 Paul Avenue 1-4 (5) 5.74% Oct 8, 2015 67,591 68,665 2045 & 2055 Lafayette Street (5) 5.93% Feb 6, 2017 62,003 62,563 34551 Ardenwood Boulevard 1-4 (5) 5.95% Nov 11, 2016 50,910 51,339 1100 Space Park Drive (5) 5.89% Dec 11, 2016 50,861 51,295 600 West Seventh Street 5.80% Mar 15, 2016 46,926 47,825 150 South First Street (5) 6.30% Feb 6, 2017 48,902 49,316 2334 Lundy Place (5) 5.96% Nov 11, 2016 37,029 37,340 8025 North Interstate 35 4.09% Mar 6, 2016 5,924 6,057 731 East Trade Street 8.22% Jul 1, 2020 3,650 3,836 Unamortized net premiums 511 582 Total mortgage loans, including premiums 374,307 378,818 Total indebtedness $ 4,968,826 $ 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. Two six -month extensions are available, which we may exercise if certain conditions are met. (2) Balances as of June 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of June 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate Floating Rate Borrowing (a) U.S. dollar ($) $ 115,000 1.29 % $ 90,000 1.27 % British pound sterling (£) 124,125 (c) 1.62 % 132,716 (d) 1.61 % Euro (€) 214,245 (c) 1.04 % 58,071 (d) 1.13 % Australian dollar (AUD) 86,396 (c) 3.14 % 72,676 (d) 3.74 % Hong Kong dollar (HKD) 88,075 (c) 1.34 % 79,336 (d) 1.34 % Japanese yen (JPY) 13,877 (c) 1.16 % 13,201 (d) 1.17 % Singapore dollar (SGD) 53,067 (c) 1.85 % 6,565 (d) 1.64 % Canadian dollar (CAD) 73,228 (c) 2.09 % 62,386 (d) 2.39 % Total $ 768,013 1.60 % $ 514,951 1.84 % Base Rate Borrowing (b) U.S. dollar ($) $ 9,000 3.35 % $ 11,000 3.35 % Total borrowings $ 777,013 1.62 % $ 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 $1.57 to £1.00 , $1.11 to €1.00 , $0.77 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.74 to 1.00 SGD and $0.80 to 1.00 CAD, respectively, as of June 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 $0.86 to 1.00 CAD, respectively, as of December 31, 2014 . (3) Interest rates are based on our current senior unsecured debt ratings and are 120 basis points over the applicable index for floating rate advances. Two six -month extensions are available, which we may exercise if certain conditions are met. (4) Balances as of June 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of June 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate U.S. dollar ($) $ 410,905 1.38 % (b) $ 410,905 1.36 % (d) Singapore dollar (SGD) 169,593 (a) 1.98 % (b) 172,426 (c) 1.45 % (d) British pound sterling (£) 189,997 (a) 1.77 % 188,365 (c) 1.76 % Euro (€) 110,913 (a) 1.15 % 120,375 (c) 1.22 % Australian dollar (AUD) 79,690 (a) 3.34 % 84,529 (c) 3.98 % Total $ 961,098 1.70 % (b) $ 976,600 1.66 % (d) (a) Based on exchange rates of $0.74 to 1.00 SGD, $1.57 to £1.00 , $1.11 to €1.00 and $0.77 to 1.00 AUD, respectively, as of June 30, 2015 . (b) As of June 30, 2015 , the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.11% (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 is 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 $1.57 to £1.00 as of June 30, 2015 and $1.56 to £1.00 as of December 31, 2014 . 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 two six -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 June 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 June 30, 2015 , we have capitalized approximately $18.0 million of financing costs related to the global revolving credit facility. As of June 30, 2015 , approximately $777.0 million was drawn under the global revolving credit facility and $8.1 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 June 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 two six -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 June 30, 2015 , the balance outstanding is approximately $961.1 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 June 30, 2015 , we were in compliance with all of such covenants. As of June 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 June 30, 2015, we were in compliance with each of these financial covenants. The table below summarizes our debt maturities and principal payments as of June 30, 2015 (in thousands): Global Revolving Credit Facility (1) Unsecured (1) Prudential Shelf Facility Senior Notes Mortgage Loans Total Debt Remainder of 2015 $ — $ — $ — $ — $ 71,052 $ 71,052 2016 — — 25,000 — 191,979 216,979 2017 777,013 961,098 50,000 — 108,395 1,896,506 2018 — — — — 593 593 2019 — — — — 644 644 Thereafter — — — 2,799,840 1,133 2,800,973 Subtotal $ 777,013 $ 961,098 $ 75,000 $ 2,799,840 $ 373,796 $ 4,986,747 Unamortized discount — — — (18,432 ) — (18,432 ) Unamortized premium — — — — 511 511 Total $ 777,013 $ 961,098 $ 75,000 $ 2,781,408 $ 374,307 $ 4,968,826 (1) Subject to two six -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.

Income per Share

Income per Share	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Net income available to common stockholders $ 117,055 $ 41,510 $ 218,783 $ 75,696 Weighted average shares outstanding—basic 135,810,060 133,802,622 135,757,584 131,183,857 Potentially dilutive common shares: Stock options 30,601 45,278 31,402 43,023 Unvested incentive units 68,371 74,345 55,742 65,847 Market performance-based awards 589,972 55,640 416,267 27,820 Weighted average shares outstanding—diluted 136,499,004 133,977,885 136,260,995 131,320,547 Income per share: Basic $ 0.86 $ 0.31 $ 1.61 $ 0.58 Diluted $ 0.86 $ 0.31 $ 1.61 $ 0.58 We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 2,757,466 2,812,716 2,730,120 2,710,262 Potentially dilutive 2029 Debentures — 1,121,910 — 3,948,379 Potentially dilutive Series E Cumulative Redeemable Preferred Stock 4,360,736 5,060,744 4,376,813 5,367,507 Potentially dilutive Series F Cumulative Redeemable Preferred Stock 2,765,569 3,209,512 2,775,765 3,404,060 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 3,781,463 4,388,483 3,795,404 4,654,496 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 5,541,340 6,437,332 5,561,769 3,449,841 19,206,574 23,030,697 19,239,871 23,534,545

Income per Unit

Income per Unit	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Net income available to common unitholders $ 119,432 $ 42,383 $ 223,186 $ 77,262 Weighted average units outstanding—basic 138,567,526 136,615,338 138,487,704 133,894,119 Potentially dilutive common units: Stock options 30,601 45,278 31,402 43,023 Unvested incentive units 68,371 74,345 55,742 65,847 Market performance-based awards 589,972 55,640 416,267 27,820 Weighted average units outstanding—diluted 139,256,470 136,790,601 138,991,115 134,030,809 Income per unit: Basic $ 0.86 $ 0.31 $ 1.61 $ 0.58 Diluted $ 0.86 $ 0.31 $ 1.61 $ 0.58 We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Potentially dilutive 2029 Debentures — 1,121,910 — 3,948,379 Potentially dilutive Series E Cumulative Redeemable Preferred Units 4,360,736 5,060,744 4,376,813 5,367,507 Potentially dilutive Series F Cumulative Redeemable Preferred Units 2,765,569 3,209,512 2,775,765 3,404,060 Potentially dilutive Series G Cumulative Redeemable Preferred Units 3,781,463 4,388,483 3,795,404 4,654,496 Potentially dilutive Series H Cumulative Redeemable Preferred Units 5,541,340 6,437,332 5,561,769 3,449,841 16,449,108 20,217,981 16,509,751 20,824,283

Income Taxes

Income Taxes	6 Months Ended
	Jun. 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 six months ended June 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 six months ended June 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 six months ended June 30, 2015 and 2014 . As of June 30, 2015 , we had deferred tax liabilities, net of deferred tax assets, of approximately $139.4 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.

Equity And Accumulated Other Co

Equity And Accumulated Other Comprehensive Income, Net	6 Months Ended
	Jun. 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 June 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 six months ended June 30, 2015 and 2014 . As of June 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) 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 June 30, 2015 and December 31, 2014 : June 30, 2015 December 31, 2014 Number of units Percentage of total Number of units Percentage of total Digital Realty Trust, Inc. 135,832,492 97.9 % 135,626,255 97.8 % Noncontrolling interests consist of: Common units held by third parties 1,425,314 1.0 1,463,814 1.1 Incentive units held by employees and directors (see Note 13) 1,505,666 1.1 1,549,847 1.1 138,763,472 100.0 % 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 $182.8 million and $179.0 million based on the closing market price of Digital Realty Trust, Inc. common stock on June 30, 2015 and December 31, 2014 , respectively. The following table shows activity for the noncontrolling interests in the Operating Partnership for the six months ended June 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) (38,500 ) — (38,500 ) 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 — (15,150 ) (15,150 ) Grant of incentive units to employees and directors — 47,056 47,056 As of June 30, 2015 1,425,314 1,505,666 2,930,980 (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. (c) Dividends We have declared and paid the following dividends on our common and preferred stock for the six months ended June 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 $ 10,062 $ 6,046 $ 7,344 $ 13,460 $ 230,877 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. (d) Accumulated Other Comprehensive Income, Net The accumulated balances for each item within other comprehensive income, net are as follows (in thousands): Foreign currency Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (39,567 ) $ (5,479 ) $ (45,046 ) Net current period change (21,947 ) (1) (1,804 ) (23,751 ) Reclassification to interest expense from interest rate swaps — 1,473 1,473 Balance as of June 30, 2015 $ (61,514 ) $ (5,810 ) $ (67,324 ) (1) During the first six 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.

Capital And Accumulated Other C

Capital And Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 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 $182.8 million and $179.0 million based on the closing market price of Digital Realty Trust, Inc.’s common stock on June 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 six months ended June 30, 2015 (in thousands, except for per unit data): Date distribution declared Distribution Series E Series F Series G Series H Common 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 $ 10,062 $ 6,046 $ 7,344 $ 13,460 $ 235,834 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 Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (42,138 ) $ (6,295 ) $ (48,433 ) Net current period change (22,375 ) (1) (1,840 ) (24,215 ) Reclassification to interest expense from interest rate swaps — 1,503 1,503 Balance as of June 30, 2015 $ (64,513 ) $ (6,632 ) $ (71,145 ) (1) During the first six 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.

Incentive Plan

Incentive Plan	6 Months Ended
	Jun. 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 June 30, 2015 , 4,683,490 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 six months ended June 30, 2015 . Unvested Long-term Incentive Units Units Weighted-Average Grant Date Fair Value Unvested, beginning of period 314,415 $ 59.34 Granted 47,056 64.81 Vested (157,300 ) 60.25 Cancelled or expired (15,150 ) 58.26 Unvested, end of period 189,021 60.04 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. The expense recorded for the three months ended June 30, 2015 and 2014 related to long-term incentive units was approximately $1.8 million and $2.0 million , respectively, and approximately $3.1 million and $9.9 million for the six months ended June 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 $0.1 million and $0.4 million for the three months ended June 30, 2015 and 2014 , respectively, and approximately $1.0 million and $0.9 million for the six months ended June 30, 2015 and 2014 , respectively. Unearned compensation representing the unvested portion of the long-term incentive units totaled $7.4 million and $9.3 million as of June 30, 2015 and December 31, 2014 , respectively. We expect to recognize this unearned compensation over the next 2.2 years on a weighted-average basis. (b) Market Performance-Based Awards During the six months ended June 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 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 June 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 June 30, 2015 and December 31, 2014 was $21.7 million and $9.5 million , respectively, net of cancellations. As of June 30, 2015 , none of the above awards had vested. We recognized compensation expense related to these awards of approximately $2.1 million and $1.0 million in the three months ended June 30, 2015 and 2014, respectively, and approximately $3.3 million and $1.4 million in the six months ended June 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation expense of employees directly engaged in construction and leasing activities of approximately $0.6 million and $0.4 million for the three months ended June 30, 2015 and 2014, respectively, and approximately $1.0 million and $0.6 million for the six months ended June 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 six-month period ended June 30, 2015 : Period Ended June 30, 2015 Shares Weighted average exercise price Options outstanding, beginning of period 80,933 $ 37.25 Exercised (11,961 ) 41.19 Options outstanding, end of period 68,972 $ 36.57 Exercisable, end of period 68,972 $ 36.57 The following table summarizes information about stock options outstanding and exercisable as of June 30, 2015 : Options outstanding and exercisable Exercise price Number outstanding Weighted-average remaining contractual life (years) Weighted-average exercise price Aggregate intrinsic value $20.37 15,000 0.36 20.37 $ 694,650 $33.18-41.73 53,972 1.80 41.07 1,382,298 Total / Weighted-average 68,972 1.49 $ 36.57 $ 2,076,948 (d) Restricted Stock Below is a summary of our restricted stock activity for the six months ended June 30, 2015 . Unvested Restricted Stock Shares Weighted-Average Grant Date Fair Value Unvested, beginning of period 300,502 $ 57.10 Granted 101,227 66.72 Vested (88,869 ) 59.45 Cancelled or expired (19,742 ) 58.99 Unvested, end of period 293,118 60.91 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 June 30, 2015 and 2014 related to grants of restricted stock was approximately $0.7 million and $0.6 million , respectively, and approximately $1.2 million and $1.4 million for the six months ended June 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 $0.8 million and $0.8 million for the three months ended June 30, 2015 and 2014 , respectively, and approximately $1.5 million and $1.6 million for the six months ended June 30, 2015 and 2014 , respectively. Unearned compensation representing the unvested portion of the restricted stock totaled $13.5 million and $10.4 million as of June 30, 2015 and December 31, 2014, respectively. We expect to recognize this unearned compensation over the next 2.8 years on a weighted-average basis.

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 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 June 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 June 30, 2015 or December 31, 2014 . As of June 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 June 30, 2015 As of December 31, 2014 Type of Derivative Strike Rate Effective Date Expiration Date As of As of December 31, 2014 Currently-paying contracts $ 335,905 (1) $ 410,905 (1) Swap 0.717 Various Various $ (999 ) $ (241 ) 140,647 (2) 142,965 (2) Swap 0.925 July 17, 2012 April 18, 2017 884 669 476,552 553,870 (115 ) 428 Forward-starting contracts — (3) 150,000 Forward-starting Swap 2.091 July 15, 2014 July 15, 2019 — (2,837 ) Total $ 476,552 $ 703,870 $ (115 ) $ (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 $0.74 to 1.00 SGD as of June 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 June 30, 2015 , we estimate that an additional $2.3 million will be reclassified as an increase to interest expense during the twelve months ended June 30, 2016 , when the hedged forecasted transactions impact earnings.

Fair Value Of Instruments

Fair Value Of Instruments	6 Months Ended
	Jun. 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 June 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 June 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 June 30, 2015 As of December 31, 2014 Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Global revolving credit facility (1) Level 2 $ 777,013 $ 777,013 $ 525,951 $ 525,951 Unsecured term loan (2) Level 2 961,098 961,098 976,600 976,600 Unsecured senior notes (3)(4) Level 2 3,002,157 2,856,408 2,968,073 2,791,758 Mortgage loans (3) Level 2 391,893 374,307 399,569 378,818 $ 5,132,161 $ 4,968,826 $ 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 2015 Notes, 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 2015 Notes, 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 2023 Notes and 2025 Notes are net of discount of $18,432 and $15,632 in the aggregate as of June 30, 2015 and December 31, 2014 , respectively.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 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 June 30, 2015 , $12.4 million had been accrued and capitalized for an additional earnout payment. The maximum amount that could be earned by the seller is $50.0 million SGD (or approximately $37.1 million based on the exchange rate as of June 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 six months ended June 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. At June 30, 2015 , the fair value of the contingent consideration for the Sentrum Portfolio was £1.4 million (or approximately $2.1 million based on the exchange rate as of June 30, 2015 ) and is currently accrued in accounts payable and other accrued expenses in the condensed consolidated balance sheet. The final payment is expected to be made by the end of 2015. We made earnout payments of approximately £3.4 million (or approximately $5.7 million based on the exchange rates as of the date of each payment) during the six months ended June 30, 2014. We made no earnout payments during the six months ended June 30, 2015 . The change in fair value of contingent consideration for Sentrum was recorded as an increase to operating expense of approximately $0 and $0.8 million for the three months ended June 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 $2.6 million for the six months ended June 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 June 30, 2015 , we had open commitments related to construction contracts of approximately $113.4 million . (c) Legal Proceedings Although the Company is involved in legal proceedings arising in the ordinary course of business, as of June 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.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On July 13, 2015, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Telx Holdings, Inc. (“Telx”), and BSR LLC, as representative of the sellers, pursuant to which the Company agreed to acquire 100% of Telx for approximately $1.886 billion in cash, excluding transaction related expenses, subject to customary closing adjustments (the “Telx Acquisition”). The Merger Agreement contains customary representations and warranties as well as covenants by each of the parties. The Telx Acquisition is expected to close later this year, subject to the satisfaction of closing conditions, including among others the continuing accuracy of representations and warranties and compliance with covenants and agreements in the Merger Agreement. On July 13, 2015, in connection with the execution of the Merger Agreement, the Company entered into a commitment letter, pursuant to which the initial commitment parties agreed to provide a senior unsecured bridge loan facility in the original principal amount of $1.85 billion to fund the Telx Acquisition. On July 14, 2015, the Company commenced an underwritten public offering of 10,500,000 shares of its common stock, all of which were offered in connection with forward sale agreements the Company entered into with certain financial institutions acting as forward purchasers (the “Forward Equity Sale”). Each of the three forward purchasers borrowed and sold approximately 3,500,000 shares of the Company’s common stock in the public offering. Pursuant to the terms of the forward sale agreements, and subject to its right to elect cash or net share settlement, the Company intends to sell, upon physical settlement of such forward sale agreements, an aggregate of 10,500,000 shares of its common stock to the forward purchasers. In addition, the Company granted the underwriters a 30 -day option to purchase an additional 1,575,000 shares of its common stock to cover overallotments, if any. The Company did not receive any proceeds from the sale of its common stock by the forward purchasers. Assuming full physical settlement of the forward sale agreements (by the delivery of shares of the Company’s common stock) at the initial forward sale price of $65.28 per share and that the underwriters have not exercised their option to purchase additional shares, the Company expects to receive net proceeds of approximately $686.4 million (after deducting fees and net estimated expenses related to the forward sale agreements and the offering), subject to certain adjustments pursuant to the forward sale agreements, upon settlement of the forward sale agreements, which settlement the Company expects will occur prior to or concurrently with the consummation of the Telx Acquisition. The Company intends to use the net proceeds from the Forward Equity Sale to fund a portion of the Telx Acquisition. On July 22, 2015, the Company 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 the Company 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. The Company previously recorded an expense of approximately $12.7 million in connection with Mr. Foust’s severance payments and expects to reverse the excess expense of approximately $4.7 million in the three months ending September 30, 2015.

Summary Of Significant Accoun27

Summary Of Significant Accounting Policies (Policy)	6 Months Ended
	Jun. 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. 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. Digital Realty Trust, Inc. itself has not issued any indebtedness but guarantees the unsecured debt of the Operating Partnership and certain of its subsidiaries, 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, the Operating Partnership generates the capital required by the Company’s business primarily through the Operating Partnership’s operations, by the Operating Partnership’s 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 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 June 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 June 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 six months ended June 30, 2015 and 2014 , we had no such interest or penalties. The tax year 2011 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.

Investments In Real Estate (Tab

Investments In Real Estate (Tables)	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	We acquired the following real estate properties during the six months ended June 30, 2015 : Location Metropolitan Area Date Acquired Amount (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 six months ended June 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 $ 10.2 3300 East Birch Street Los Angeles March 31, 2015 14.2 7.6 833 Chestnut Street Philadelphia April 30, 2015 160.8 (1) 76.7 $ 206.1 $ 94.5 (1) Gross proceeds includes a $9.0 million note receivable, which is expected to be collected by year-end.

Investment In Unconsolidated 29

Investment In Unconsolidated Joint Ventures (Tables)	6 Months Ended
	Jun. 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 June 30, 2015 and December 31, 2014 and for the six months ended June 30, 2015 and 2014 (unaudited, in thousands): As of June 30, 2015 Six Months Ended June 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 $ 768,673 $ 943,900 $ 460,789 $ 559,118 $ 384,782 $ 63,976 $ (17,718 ) $ 46,258 $ 18,360 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 103,410 $ 8,001 As of December 31, 2014 Six Months Ended June 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 $ 46,188 $ (10,940 ) $ 35,248 $ 14,896 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 94,729 $ 6,058

Acquired Intangible Assets An30

Acquired Intangible Assets And Liabilities (Tables)	6 Months Ended
	Jun. 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 June 30, 2015 and December 31, 2014 . Balance as of (Amounts in thousands) June 30, 2015 December 31, 2014 Acquired in-place lease value: Gross amount $ 657,024 $ 680,419 Accumulated amortization (451,744 ) (452,739 ) Net $ 205,280 $ 227,680 Acquired above-market leases: Gross amount $ 120,553 $ 126,677 Accumulated amortization (86,617 ) (88,072 ) Net $ 33,936 $ 38,605 Acquired below-market leases: Gross amount $ 280,090 $ 282,670 Accumulated amortization (185,778 ) (178,435 ) Net $ 94,312 $ 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 July 1, 2015 is as follows: (Amounts in thousands) Remainder of 2015 $ 4,296 2016 7,485 2017 6,054 2018 4,443 2019 4,545 Thereafter 33,553 Total $ 60,376
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 July 1, 2015 is as follows: (Amounts in thousands) Remainder of 2015 $ 18,617 2016 32,302 2017 27,768 2018 25,455 2019 22,932 Thereafter 78,206 Total $ 205,280

Debt of the Operating Partner31

Debt of the Operating Partnership (Tables) - Digital Realty Trust, L.P.	6 Months Ended
	Jun. 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 June 30, 2015 and December 31, 2014 is as follows (in thousands): Indebtedness Interest Rate at June 30, 2015 Maturity Date Principal Outstanding June 30, 2015 Principal Outstanding December 31, 2014 Global revolving credit facility Various (1) Nov 3, 2017 $ 777,013 (2) $ 525,951 (2) Unsecured term loan Various (3)(6) Apr 16, 2017 961,098 (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: 4.500% 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 5.250% notes due 2021 5.250% Mar 15, 2021 400,000 400,000 3.950% 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 4.750% notes due 2023 4.750% Oct 13, 2023 471,360 (10) 467,310 (10) 4.250% notes due 2025 4.250% Jan 17, 2025 628,480 (10) 623,080 (10) Unamortized discounts (18,432 ) (15,632 ) Total senior notes, net of discount 2,781,408 2,649,758 Total unsecured senior notes, net of discount 2,856,408 2,791,758 Indebtedness Interest Rate at June 30, 2015 Maturity Date Principal Outstanding June 30, 2015 Principal Outstanding December 31, 2014 Mortgage loans: 200 Paul Avenue 1-4 (5) 5.74% Oct 8, 2015 67,591 68,665 2045 & 2055 Lafayette Street (5) 5.93% Feb 6, 2017 62,003 62,563 34551 Ardenwood Boulevard 1-4 (5) 5.95% Nov 11, 2016 50,910 51,339 1100 Space Park Drive (5) 5.89% Dec 11, 2016 50,861 51,295 600 West Seventh Street 5.80% Mar 15, 2016 46,926 47,825 150 South First Street (5) 6.30% Feb 6, 2017 48,902 49,316 2334 Lundy Place (5) 5.96% Nov 11, 2016 37,029 37,340 8025 North Interstate 35 4.09% Mar 6, 2016 5,924 6,057 731 East Trade Street 8.22% Jul 1, 2020 3,650 3,836 Unamortized net premiums 511 582 Total mortgage loans, including premiums 374,307 378,818 Total indebtedness $ 4,968,826 $ 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. Two six -month extensions are available, which we may exercise if certain conditions are met. (2) Balances as of June 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of June 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate Floating Rate Borrowing (a) U.S. dollar ($) $ 115,000 1.29 % $ 90,000 1.27 % British pound sterling (£) 124,125 (c) 1.62 % 132,716 (d) 1.61 % Euro (€) 214,245 (c) 1.04 % 58,071 (d) 1.13 % Australian dollar (AUD) 86,396 (c) 3.14 % 72,676 (d) 3.74 % Hong Kong dollar (HKD) 88,075 (c) 1.34 % 79,336 (d) 1.34 % Japanese yen (JPY) 13,877 (c) 1.16 % 13,201 (d) 1.17 % Singapore dollar (SGD) 53,067 (c) 1.85 % 6,565 (d) 1.64 % Canadian dollar (CAD) 73,228 (c) 2.09 % 62,386 (d) 2.39 % Total $ 768,013 1.60 % $ 514,951 1.84 % Base Rate Borrowing (b) U.S. dollar ($) $ 9,000 3.35 % $ 11,000 3.35 % Total borrowings $ 777,013 1.62 % $ 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 $1.57 to £1.00 , $1.11 to €1.00 , $0.77 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.74 to 1.00 SGD and $0.80 to 1.00 CAD, respectively, as of June 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 $0.86 to 1.00 CAD, respectively, as of December 31, 2014 . (3) Interest rates are based on our current senior unsecured debt ratings and are 120 basis points over the applicable index for floating rate advances. Two six -month extensions are available, which we may exercise if certain conditions are met. (4) Balances as of June 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of June 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate U.S. dollar ($) $ 410,905 1.38 % (b) $ 410,905 1.36 % (d) Singapore dollar (SGD) 169,593 (a) 1.98 % (b) 172,426 (c) 1.45 % (d) British pound sterling (£) 189,997 (a) 1.77 % 188,365 (c) 1.76 % Euro (€) 110,913 (a) 1.15 % 120,375 (c) 1.22 % Australian dollar (AUD) 79,690 (a) 3.34 % 84,529 (c) 3.98 % Total $ 961,098 1.70 % (b) $ 976,600 1.66 % (d) (a) Based on exchange rates of $0.74 to 1.00 SGD, $1.57 to £1.00 , $1.11 to €1.00 and $0.77 to 1.00 AUD, respectively, as of June 30, 2015 . (b) As of June 30, 2015 , the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.11% (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 is 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 $1.57 to £1.00 as of June 30, 2015 and $1.56 to £1.00 as of December 31, 2014 .
Schedule Of Balances And Foreign Currency Translation Revolving Credit Facilities	Balances as of June 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of June 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate Floating Rate Borrowing (a) U.S. dollar ($) $ 115,000 1.29 % $ 90,000 1.27 % British pound sterling (£) 124,125 (c) 1.62 % 132,716 (d) 1.61 % Euro (€) 214,245 (c) 1.04 % 58,071 (d) 1.13 % Australian dollar (AUD) 86,396 (c) 3.14 % 72,676 (d) 3.74 % Hong Kong dollar (HKD) 88,075 (c) 1.34 % 79,336 (d) 1.34 % Japanese yen (JPY) 13,877 (c) 1.16 % 13,201 (d) 1.17 % Singapore dollar (SGD) 53,067 (c) 1.85 % 6,565 (d) 1.64 % Canadian dollar (CAD) 73,228 (c) 2.09 % 62,386 (d) 2.39 % Total $ 768,013 1.60 % $ 514,951 1.84 % Base Rate Borrowing (b) U.S. dollar ($) $ 9,000 3.35 % $ 11,000 3.35 % Total borrowings $ 777,013 1.62 % $ 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 $1.57 to £1.00 , $1.11 to €1.00 , $0.77 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.74 to 1.00 SGD and $0.80 to 1.00 CAD, respectively, as of June 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 $0.86 to 1.00 CAD, respectively, as of December 31, 2014 . Balances as of June 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of June 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate U.S. dollar ($) $ 410,905 1.38 % (b) $ 410,905 1.36 % (d) Singapore dollar (SGD) 169,593 (a) 1.98 % (b) 172,426 (c) 1.45 % (d) British pound sterling (£) 189,997 (a) 1.77 % 188,365 (c) 1.76 % Euro (€) 110,913 (a) 1.15 % 120,375 (c) 1.22 % Australian dollar (AUD) 79,690 (a) 3.34 % 84,529 (c) 3.98 % Total $ 961,098 1.70 % (b) $ 976,600 1.66 % (d) (a) Based on exchange rates of $0.74 to 1.00 SGD, $1.57 to £1.00 , $1.11 to €1.00 and $0.77 to 1.00 AUD, respectively, as of June 30, 2015 . (b) As of June 30, 2015 , the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.11% (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.
Schedule Of Debt Maturities And Principal Maturities	The table below summarizes our debt maturities and principal payments as of June 30, 2015 (in thousands): Global Revolving Credit Facility (1) Unsecured (1) Prudential Shelf Facility Senior Notes Mortgage Loans Total Debt Remainder of 2015 $ — $ — $ — $ — $ 71,052 $ 71,052 2016 — — 25,000 — 191,979 216,979 2017 777,013 961,098 50,000 — 108,395 1,896,506 2018 — — — — 593 593 2019 — — — — 644 644 Thereafter — — — 2,799,840 1,133 2,800,973 Subtotal $ 777,013 $ 961,098 $ 75,000 $ 2,799,840 $ 373,796 $ 4,986,747 Unamortized discount — — — (18,432 ) — (18,432 ) Unamortized premium — — — — 511 511 Total $ 777,013 $ 961,098 $ 75,000 $ 2,781,408 $ 374,307 $ 4,968,826 (1) Subject to two six -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.

Income per Share (Tables)

Income per Share (Tables)	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Net income available to common stockholders $ 117,055 $ 41,510 $ 218,783 $ 75,696 Weighted average shares outstanding—basic 135,810,060 133,802,622 135,757,584 131,183,857 Potentially dilutive common shares: Stock options 30,601 45,278 31,402 43,023 Unvested incentive units 68,371 74,345 55,742 65,847 Market performance-based awards 589,972 55,640 416,267 27,820 Weighted average shares outstanding—diluted 136,499,004 133,977,885 136,260,995 131,320,547 Income per share: Basic $ 0.86 $ 0.31 $ 1.61 $ 0.58 Diluted $ 0.86 $ 0.31 $ 1.61 $ 0.58
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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 2,757,466 2,812,716 2,730,120 2,710,262 Potentially dilutive 2029 Debentures — 1,121,910 — 3,948,379 Potentially dilutive Series E Cumulative Redeemable Preferred Stock 4,360,736 5,060,744 4,376,813 5,367,507 Potentially dilutive Series F Cumulative Redeemable Preferred Stock 2,765,569 3,209,512 2,775,765 3,404,060 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 3,781,463 4,388,483 3,795,404 4,654,496 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 5,541,340 6,437,332 5,561,769 3,449,841 19,206,574 23,030,697 19,239,871 23,534,545

Income per Unit (Tables)

Income per Unit (Tables)	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Net income available to common stockholders $ 117,055 $ 41,510 $ 218,783 $ 75,696 Weighted average shares outstanding—basic 135,810,060 133,802,622 135,757,584 131,183,857 Potentially dilutive common shares: Stock options 30,601 45,278 31,402 43,023 Unvested incentive units 68,371 74,345 55,742 65,847 Market performance-based awards 589,972 55,640 416,267 27,820 Weighted average shares outstanding—diluted 136,499,004 133,977,885 136,260,995 131,320,547 Income per share: Basic $ 0.86 $ 0.31 $ 1.61 $ 0.58 Diluted $ 0.86 $ 0.31 $ 1.61 $ 0.58
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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 2,757,466 2,812,716 2,730,120 2,710,262 Potentially dilutive 2029 Debentures — 1,121,910 — 3,948,379 Potentially dilutive Series E Cumulative Redeemable Preferred Stock 4,360,736 5,060,744 4,376,813 5,367,507 Potentially dilutive Series F Cumulative Redeemable Preferred Stock 2,765,569 3,209,512 2,775,765 3,404,060 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 3,781,463 4,388,483 3,795,404 4,654,496 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 5,541,340 6,437,332 5,561,769 3,449,841 19,206,574 23,030,697 19,239,871 23,534,545
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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Net income available to common unitholders $ 119,432 $ 42,383 $ 223,186 $ 77,262 Weighted average units outstanding—basic 138,567,526 136,615,338 138,487,704 133,894,119 Potentially dilutive common units: Stock options 30,601 45,278 31,402 43,023 Unvested incentive units 68,371 74,345 55,742 65,847 Market performance-based awards 589,972 55,640 416,267 27,820 Weighted average units outstanding—diluted 139,256,470 136,790,601 138,991,115 134,030,809 Income per unit: Basic $ 0.86 $ 0.31 $ 1.61 $ 0.58 Diluted $ 0.86 $ 0.31 $ 1.61 $ 0.58
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 June 30, Six Months Ended June 30, 2015 2014 2015 2014 Potentially dilutive 2029 Debentures — 1,121,910 — 3,948,379 Potentially dilutive Series E Cumulative Redeemable Preferred Units 4,360,736 5,060,744 4,376,813 5,367,507 Potentially dilutive Series F Cumulative Redeemable Preferred Units 2,765,569 3,209,512 2,775,765 3,404,060 Potentially dilutive Series G Cumulative Redeemable Preferred Units 3,781,463 4,388,483 3,795,404 4,654,496 Potentially dilutive Series H Cumulative Redeemable Preferred Units 5,541,340 6,437,332 5,561,769 3,449,841 16,449,108 20,217,981 16,509,751 20,824,283

Equity And Accumulated Other 34

Equity And Accumulated Other Comprehensive Income, Net (Tables)	6 Months Ended
	Jun. 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 June 30, 2015 and December 31, 2014 : June 30, 2015 December 31, 2014 Number of units Percentage of total Number of units Percentage of total Digital Realty Trust, Inc. 135,832,492 97.9 % 135,626,255 97.8 % Noncontrolling interests consist of: Common units held by third parties 1,425,314 1.0 1,463,814 1.1 Incentive units held by employees and directors (see Note 13) 1,505,666 1.1 1,549,847 1.1 138,763,472 100.0 % 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 six months ended June 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) (38,500 ) — (38,500 ) 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 — (15,150 ) (15,150 ) Grant of incentive units to employees and directors — 47,056 47,056 As of June 30, 2015 1,425,314 1,505,666 2,930,980 (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 six months ended June 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 $ 10,062 $ 6,046 $ 7,344 $ 13,460 $ 230,877 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 Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (39,567 ) $ (5,479 ) $ (45,046 ) Net current period change (21,947 ) (1) (1,804 ) (23,751 ) Reclassification to interest expense from interest rate swaps — 1,473 1,473 Balance as of June 30, 2015 $ (61,514 ) $ (5,810 ) $ (67,324 ) (1) During the first six 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.

Capital And Accumulated Other35

Capital And Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2015
Schedule Of Dividends/Distributions	We have declared and paid the following dividends on our common and preferred stock for the six months ended June 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 $ 10,062 $ 6,046 $ 7,344 $ 13,460 $ 230,877 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 Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (39,567 ) $ (5,479 ) $ (45,046 ) Net current period change (21,947 ) (1) (1,804 ) (23,751 ) Reclassification to interest expense from interest rate swaps — 1,473 1,473 Balance as of June 30, 2015 $ (61,514 ) $ (5,810 ) $ (67,324 ) (1) During the first six 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 six months ended June 30, 2015 (in thousands, except for per unit data): Date distribution declared Distribution Series E Series F Series G Series H Common 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 $ 10,062 $ 6,046 $ 7,344 $ 13,460 $ 235,834 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 Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (42,138 ) $ (6,295 ) $ (48,433 ) Net current period change (22,375 ) (1) (1,840 ) (24,215 ) Reclassification to interest expense from interest rate swaps — 1,503 1,503 Balance as of June 30, 2015 $ (64,513 ) $ (6,632 ) $ (71,145 ) (1) During the first six 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.

Incentive Plan (Tables)

Incentive Plan (Tables)	6 Months Ended
	Jun. 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 six months ended June 30, 2015 . Unvested Long-term Incentive Units Units Weighted-Average Grant Date Fair Value Unvested, beginning of period 314,415 $ 59.34 Granted 47,056 64.81 Vested (157,300 ) 60.25 Cancelled or expired (15,150 ) 58.26 Unvested, end of period 189,021 60.04
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 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 six-month period ended June 30, 2015 : Period Ended June 30, 2015 Shares Weighted average exercise price Options outstanding, beginning of period 80,933 $ 37.25 Exercised (11,961 ) 41.19 Options outstanding, end of period 68,972 $ 36.57 Exercisable, end of period 68,972 $ 36.57
Summary Of Stock Options Outstanding And Exercisable	The following table summarizes information about stock options outstanding and exercisable as of June 30, 2015 : Options outstanding and exercisable Exercise price Number outstanding Weighted-average remaining contractual life (years) Weighted-average exercise price Aggregate intrinsic value $20.37 15,000 0.36 20.37 $ 694,650 $33.18-41.73 53,972 1.80 41.07 1,382,298 Total / Weighted-average 68,972 1.49 $ 36.57 $ 2,076,948
Summary Of Restricted Stock Activity	Below is a summary of our restricted stock activity for the six months ended June 30, 2015 . Unvested Restricted Stock Shares Weighted-Average Grant Date Fair Value Unvested, beginning of period 300,502 $ 57.10 Granted 101,227 66.72 Vested (88,869 ) 59.45 Cancelled or expired (19,742 ) 58.99 Unvested, end of period 293,118 60.91

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of Outstanding Derivative Instruments	As of June 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 June 30, 2015 As of December 31, 2014 Type of Derivative Strike Rate Effective Date Expiration Date As of As of December 31, 2014 Currently-paying contracts $ 335,905 (1) $ 410,905 (1) Swap 0.717 Various Various $ (999 ) $ (241 ) 140,647 (2) 142,965 (2) Swap 0.925 July 17, 2012 April 18, 2017 884 669 476,552 553,870 (115 ) 428 Forward-starting contracts — (3) 150,000 Forward-starting Swap 2.091 July 15, 2014 July 15, 2019 — (2,837 ) Total $ 476,552 $ 703,870 $ (115 ) $ (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 $0.74 to 1.00 SGD as of June 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.

Fair Value Of Instruments (Tabl

Fair Value Of Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Estimated Fair Value And Carrying Amounts	As of June 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 June 30, 2015 As of December 31, 2014 Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Global revolving credit facility (1) Level 2 $ 777,013 $ 777,013 $ 525,951 $ 525,951 Unsecured term loan (2) Level 2 961,098 961,098 976,600 976,600 Unsecured senior notes (3)(4) Level 2 3,002,157 2,856,408 2,968,073 2,791,758 Mortgage loans (3) Level 2 391,893 374,307 399,569 378,818 $ 5,132,161 $ 4,968,826 $ 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 2015 Notes, 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 2015 Notes, 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 2023 Notes and 2025 Notes are net of discount of $18,432 and $15,632 in the aggregate as of June 30, 2015 and December 31, 2014 , respectively.

Organization And Description 39

Organization And Description Of Business (Narrative) (Details) - Jun. 30, 2015 - property	Total
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	97.90%
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

Summary Of Significant Accoun40

Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)segment	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)
Summary Of Significant Accounting Policies [Line Items]
Period in which short-term investment become cash equivalents			90 days
Interest capitalized	$ 3,200	$ 4,900	$ 7,500	$ 10,200
Compensation costs, leasing and construction activities	14,000	14,100	28,300	27,900
Cash flows from capitalized leasing costs			$ 26,400	21,800
Number of reportable segments | segment			1
Total operating revenues	420,295	401,446	$ 826,904	792,036
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	322,400	305,500	637,100	600,700
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	97,900	95,900	189,800	191,300
Long-lived assets	2,700,000		2,700,000		2,700,000
United Kingdom
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues	54,800	$ 54,500	104,900	$ 109,400
Long-lived assets	$ 1,800,000		$ 1,800,000		$ 1,700,000
Sales
Summary Of Significant Accounting Policies [Line Items]
Concentration risk	13.00%	13.60%	12.70%	13.80%
Long-Lived Assets
Summary Of Significant Accounting Policies [Line Items]
Concentration risk			21.70%		21.30%

Investments In Real Estate (Det

Investments In Real Estate (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015USD ($)property	Dec. 31, 2014USD ($)property	Mar. 31, 2015property
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
Gain on Sale	94,500
Impairment of investments in real estate		$ 126,500
Assets	9,586,009	9,526,784
Total liabilities	5,695,816	$ 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
Gain on Sale	10,200
3300 East Birch Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	14,200
Gain on Sale	7,600
833 Chestnut Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	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
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
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property	3
Assets	$ 172,000
Total liabilities	$ 7,400
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

Investment In Unconsolidated 42

Investment In Unconsolidated Joint Ventures (Narrative) (Details) $ in Thousands	Sep. 09, 2014USD ($)	Mar. 05, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2015USD ($)extensionpropertyjoint_venture	Dec. 31, 2014USD ($)
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated joint ventures				$ 103,410	$ 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
Balance as of June 30, 2015		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

Investment In Unconsolidated 43

Investment In Unconsolidated Joint Ventures (Summary Of Financial Information For Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Net investment in properties			$ 768,673		$ 779,752
Total assets	$ 943,900		943,900		942,107
Debt	460,789		460,789		461,548
Total liabilities	559,118		559,118		569,895
Equity (deficit)	384,782		384,782		372,212
Investment in unconsolidated joint ventures	103,410		103,410		$ 94,729
Revenues			63,976	$ 46,188
Property operating expense			(17,718)	(10,940)
Net operating income			46,258	35,248
Net income (loss)			18,360	14,896
Investment in and share of net income (loss)	$ 3,383	$ 3,477	$ 8,001	$ 6,058

Acquired Intangible Assets An44

Acquired Intangible Assets And Liabilities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of below market leases	$ 2,400	$ 2,600	$ 4,700	$ 5,300
Expected average remaining lives of acquired below market leases			2142 days
Amortization of intangible assets			$ 33,830	42,687
Acquired Above-Market Lease Value
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives			1277 days
Acquired-In Place Lease Value
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives			2174 days
Amortization of intangible assets	$ 10,500	$ 18,400	$ 22,100	$ 33,400
Weighted average remaining contractual life for acquired leases excluding renewals or extensions			1684 days

Acquired Intangible Assets An45

Acquired Intangible Assets And Liabilities (Summary Of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Net	$ 205,280
Below-market lease, gross amount	280,090	$ 282,670
Below-market lease, accumulated amortization	(185,778)	(178,435)
Below-market lease, net	94,312	104,235
Acquired-In Place Lease Value
Finite-Lived Intangible Assets [Line Items]
Gross amount	657,024	680,419
Accumulated amortization	(451,744)	(452,739)
Net	205,280	227,680
Acquired Above-Market Lease Value
Finite-Lived Intangible Assets [Line Items]
Gross amount	120,553	126,677
Accumulated amortization	(86,617)	(88,072)
Net	$ 33,936	$ 38,605

Acquired Intangible Assets An46

Acquired Intangible Assets And Liabilities (Schedule Of Estimated Annual Amortization Of Below Market Leases) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Below-market lease, net	$ 94,312	$ 104,235
Below-Market Leases, Net of Above-Market Leases
Finite-Lived Intangible Assets [Line Items]
Below-market leases, Remainder of 2015	4,296
Below-market leases, 2016	7,485
Below-market leases, 2017	6,054
Below-market leases, 2018	4,443
Below-market leases, 2019	4,545
Below-market leases, Thereafter	33,553
Below-market lease, net	$ 60,376

Acquired Intangible Assets An47

Acquired Intangible Assets And Liabilities (Schedule Of Estimated Annual Amortization Of Acquired In Place Leases) (Details) $ in Thousands	Jun. 30, 2015USD ($)
Acquired Intangible Assets And Liabilities [Abstract]
Remainder of 2015	$ 18,617
2,016	32,302
2,017	27,768
2,018	25,455
2,019	22,932
Thereafter	78,206
Net	$ 205,280

Debt of the Company (Details)

Debt of the Company (Details) - Senior Notes:	6 Months Ended
	Jun. 30, 2015	Jun. 23, 2015
5.875% notes due 2020
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	5.875%
Maturity date	2,020
5.250% notes due 2021
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	5.25%
Maturity date	2,021
3.625% notes due 2022
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	3.625%
Maturity date	2,022
3.950% notes due 2022
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	3.95%	3.95%
4.750% notes due 2023
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	4.75%
Maturity date	2,023
4.250% notes due 2025
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	4.25%
Maturity date	2,025

Debt of the Operating Partner49

Debt of the Operating Partnership (Summary of Outstanding Indebtedness) (Details)	Jun. 23, 2015USD ($)	May. 26, 2015	Jun. 30, 2015USD ($)extension$ / £	Dec. 31, 2014USD ($)$ / £
Debt Instrument [Line Items]
Unsecured senior notes, net of discount			$ 2,856,408,000	$ 2,791,758,000
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of June 30, 2015			777,013,000	525,951,000
Unsecured term loan
Debt Instrument [Line Items]
Balance as of June 30, 2015			$ 961,098,000	976,600,000
Senior Notes: | 5.875% notes due 2020
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			5.875%
Senior Notes: | 5.250% notes due 2021
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			5.25%
Senior Notes: | 3.950% notes due 2022
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	3.95%		3.95%
Unamortized discounts	$ (3,800,000)
Face amount	$ 500,000,000
Principal received relative to par value	99.236%
Senior Notes: | 3.625% notes due 2022
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			3.625%
Senior Notes: | 4.750% notes due 2023
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			4.75%
Senior Notes: | 4.250% notes due 2025
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			4.25%
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Subtotal			$ 4,986,747,000
Unamortized discounts			(18,432,000)
Unsecured senior notes, net of discount			$ 2,856,408,000	$ 2,791,758,000
Digital Realty Trust, L.P. | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £			1.57	1.56
Digital Realty Trust, L.P. | Global revolving credit facility
Debt Instrument [Line Items]
Maturity Date			Nov. 3, 2017
Balance as of June 30, 2015			$ 777,013,000	$ 525,951,000
Subtotal			777,013,000
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 | $ / £			1.57	1.56
Digital Realty Trust, L.P. | Global revolving credit facility | Floating Rate
Debt Instrument [Line Items]
Balance as of June 30, 2015			$ 768,013,000	$ 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 June 30, 2015			$ 124,125,000	132,716,000
Digital Realty Trust, L.P. | Unsecured term loan
Debt Instrument [Line Items]
Maturity Date			Apr. 16, 2017
Balance as of June 30, 2015			$ 961,098,000	976,600,000
Subtotal			961,098,000
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 June 30, 2015			$ 189,997,000	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 June 30, 2015			9.68%
Maturity Date			Jan. 6, 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 June 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 June 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 June 30, 2015			4.50%
Maturity Date			Feb. 3, 2015
Subtotal			$ 0	17,000,000
Digital Realty Trust, L.P. | Senior Notes:
Debt Instrument [Line Items]
Subtotal			2,799,840,000
Unamortized discounts			(18,432,000)	(15,632,000)
Unsecured senior notes, net of discount			$ 2,781,408,000	2,649,758,000
Digital Realty Trust, L.P. | Senior Notes: | 4.500% notes due 2015
Debt Instrument [Line Items]
Interest Rate at June 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 June 30, 2015			5.875%
Maturity Date			Feb. 1, 2020
Subtotal			$ 500,000,000	500,000,000
Digital Realty Trust, L.P. | Senior Notes: | 5.250% notes due 2021
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			5.25%
Maturity Date			Mar. 15, 2021
Subtotal			$ 400,000,000	400,000,000
Digital Realty Trust, L.P. | Senior Notes: | 3.950% notes due 2022
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			3.95%
Maturity Date			Jul. 1, 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 June 30, 2015			3.625%
Maturity Date			Oct. 1, 2022
Subtotal			$ 300,000,000	300,000,000
Digital Realty Trust, L.P. | Senior Notes: | 4.750% notes due 2023
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			4.75%
Maturity Date			Oct. 13, 2023
Subtotal			$ 471,360,000	467,310,000
Digital Realty Trust, L.P. | Senior Notes: | 4.250% notes due 2025
Debt Instrument [Line Items]
Interest Rate at June 30, 2015			4.25%
Maturity Date			Jan. 17, 2025
Subtotal			$ 628,480,000	$ 623,080,000

Debt of the Operating Partner50

Debt of the Operating Partnership (Mortgage Loans) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Mortgage loans, including premiums	$ 374,307	$ 378,818
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Mortgage loans, including premiums	374,307	378,818
Unamortized net premiums	511
Total indebtedness	4,968,826	4,673,127
Digital Realty Trust, L.P. | Mortgage Loans
Debt Instrument [Line Items]
Unamortized net premiums	511	582
Total indebtedness	$ 374,307	378,818
Digital Realty Trust, L.P. | Mortgage Loans | 200 Paul Avenue
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	5.74%
Maturity Date	Oct. 8, 2015
Mortgage loans, including premiums	$ 67,591	68,665
Digital Realty Trust, L.P. | Mortgage Loans | 2045 & 2055 Lafayette Street
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	5.93%
Maturity Date	Feb. 6, 2017
Mortgage loans, including premiums	$ 62,003	62,563
Digital Realty Trust, L.P. | Mortgage Loans | 34551 Ardenwood Boulevard 1-4
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	5.95%
Maturity Date	Nov. 11, 2016
Mortgage loans, including premiums	$ 50,910	51,339
Digital Realty Trust, L.P. | Mortgage Loans | 1100 Space Park Drive
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	5.89%
Maturity Date	Dec. 11, 2016
Mortgage loans, including premiums	$ 50,861	51,295
Digital Realty Trust, L.P. | Mortgage Loans | 600 West Seventh Street
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	5.80%
Maturity Date	Mar. 15, 2016
Mortgage loans, including premiums	$ 46,926	47,825
Digital Realty Trust, L.P. | Mortgage Loans | 150 South First Street
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	6.30%
Maturity Date	Feb. 6, 2017
Mortgage loans, including premiums	$ 48,902	49,316
Digital Realty Trust, L.P. | Mortgage Loans | 2334 Lundy Place
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	5.96%
Maturity Date	Nov. 11, 2016
Mortgage loans, including premiums	$ 37,029	37,340
Digital Realty Trust, L.P. | Mortgage Loans | 8025 North Interstate 35
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	4.09%
Maturity Date	Mar. 6, 2016
Mortgage loans, including premiums	$ 5,924	6,057
Digital Realty Trust, L.P. | Mortgage Loans | 731 East Trade Street
Debt Instrument [Line Items]
Interest Rate at June 30, 2015	8.22%
Maturity Date	Jul. 1, 2020
Mortgage loans, including premiums	$ 3,650	$ 3,836

Debt of the Operating Partner51

Debt of the Operating Partnership (Outstanding Indebtedness - Global Revolving Credit Facility) (Details) $ in Thousands	Jun. 30, 2015USD ($)$ / ¥$ / HKD$ / £$ / CAD$ / SGD$ / €$ / AUD	Dec. 31, 2014USD ($)$ / ¥$ / HKD$ / £$ / CAD$ / SGD$ / €$ / AUD
SGD
Debt Instrument [Line Items]
Exchange rate | $ / SGD	0.74	0.75
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 777,013	$ 525,951
Digital Realty Trust, L.P. | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £	1.57	1.56
Digital Realty Trust, L.P. | EUR
Debt Instrument [Line Items]
Exchange rate | $ / €	1.11	1.21
Digital Realty Trust, L.P. | AUD
Debt Instrument [Line Items]
Exchange rate | $ / AUD	0.77	0.82
Digital Realty Trust, L.P. | Global revolving credit facility
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 777,013	$ 525,951
Weighted-average interest rate	1.62%	1.87%
Digital Realty Trust, L.P. | Global revolving credit facility | Floating Rate
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 768,013	$ 514,951
Weighted-average interest rate	1.60%	1.84%
Digital Realty Trust, L.P. | Global revolving credit facility | USD | Base Rate
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 9,000	$ 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 June 30, 2015	$ 115,000	$ 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 | $ / £	1.57	1.56
Digital Realty Trust, L.P. | Global revolving credit facility | GBP | Floating Rate
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 124,125	$ 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 | $ / €	1.11	1.21
Digital Realty Trust, L.P. | Global revolving credit facility | EUR | Floating Rate
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 214,245	$ 58,071
Weighted-average interest rate	1.04%	1.13%
Digital Realty Trust, L.P. | Global revolving credit facility | AUD
Debt Instrument [Line Items]
Exchange rate | $ / AUD	0.77	0.82
Digital Realty Trust, L.P. | Global revolving credit facility | AUD | Floating Rate
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 86,396	$ 72,676
Weighted-average interest rate	3.14%	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 June 30, 2015	$ 88,075	$ 79,336
Weighted-average interest rate	1.34%	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 June 30, 2015	$ 13,877	$ 13,201
Weighted-average interest rate	1.16%	1.17%
Digital Realty Trust, L.P. | Global revolving credit facility | SGD
Debt Instrument [Line Items]
Exchange rate | $ / SGD	0.74	0.75
Digital Realty Trust, L.P. | Global revolving credit facility | SGD | Floating Rate
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 53,067	$ 6,565
Weighted-average interest rate	1.85%	1.64%
Digital Realty Trust, L.P. | Global revolving credit facility | CAD
Debt Instrument [Line Items]
Exchange rate | $ / CAD	0.8	0.86
Digital Realty Trust, L.P. | Global revolving credit facility | CAD | Floating Rate
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 73,228	$ 62,386
Weighted-average interest rate	2.09%	2.39%

Debt of the Operating Partner52

Debt of the Operating Partnership (Outstanding Indebtedness - Unsecured Term Loan) (Details) $ in Thousands	Jun. 30, 2015USD ($)$ / £$ / SGD$ / €$ / AUD	Dec. 31, 2014USD ($)$ / £$ / SGD$ / €$ / AUD
SGD
Debt Instrument [Line Items]
Exchange rate | $ / SGD	0.74	0.75
Unsecured term loan
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 961,098	$ 976,600
Digital Realty Trust, L.P. | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £	1.57	1.56
Digital Realty Trust, L.P. | EUR
Debt Instrument [Line Items]
Exchange rate | $ / €	1.11	1.21
Digital Realty Trust, L.P. | AUD
Debt Instrument [Line Items]
Exchange rate | $ / AUD	0.77	0.82
Digital Realty Trust, L.P. | Unsecured term loan
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 961,098	$ 976,600
Weighted-average interest rate	1.70%	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 June 30, 2015	$ 410,905	$ 410,905
Weighted-average interest rate	1.38%	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 June 30, 2015	$ 169,593	$ 172,426
Weighted-average interest rate	1.98%	1.45%
Digital Realty Trust, L.P. | Unsecured term loan | SGD | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate	2.11%	2.01%
Digital Realty Trust, L.P. | Unsecured term loan | GBP
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 189,997	$ 188,365
Weighted-average interest rate	1.77%	1.76%
Digital Realty Trust, L.P. | Unsecured term loan | EUR
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 110,913	$ 120,375
Weighted-average interest rate	1.15%	1.22%
Digital Realty Trust, L.P. | Unsecured term loan | AUD
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 79,690	$ 84,529
Weighted-average interest rate	3.34%	3.98%

Debt of the Operating Partner53

Debt of the Operating Partnership (Global Revolving Credit Facility) (Narrative) (Details)	6 Months Ended
	Jun. 30, 2015USD ($)extension	Dec. 31, 2014USD ($)	Aug. 15, 2013USD ($)	Aug. 14, 2013USD ($)
Unsecured term loan
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 961,098,000	$ 976,600,000
Unsecured term loan | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1,000,000,000	$ 750,000,000
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 June 30, 2015	$ 961,098,000	976,600,000
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 777,013,000	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. 3, 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 June 30, 2015	777,013,000	$ 525,951,000
Letter of credit security amount	$ 8,100,000
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
Accordian Feature | Global revolving credit facility | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 2,550,000,000

Debt of the Operating Partner54

Debt of the Operating Partnership (Unsecured Term Loan) (Narrative) (Details) - Unsecured term loan	6 Months Ended
	Jun. 30, 2015USD ($)extension	Dec. 31, 2014USD ($)	Aug. 15, 2013USD ($)	Aug. 14, 2013USD ($)
Debt Instrument [Line Items]
Balance as of June 30, 2015	$ 961,098,000	$ 976,600,000
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1,000,000,000	$ 750,000,000
Maturity Date	Apr. 16, 2017
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Balance as of June 30, 2015	$ 961,098,000	$ 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

Debt of the Operating Partner55

Debt of the Operating Partnership (3.950% Notes due 2022) (Narrative) (Details) - Senior Notes: - 3.950% Notes Due 2022	Jun. 23, 2015USD ($)	Jun. 30, 2015
Debt Instrument [Line Items]
Face amount	$ 500,000,000
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%

Debt of the Operating Partner56

Debt of the Operating Partnership (Schedule Of Debt Maturities And Principal Maturities) (Details) - Digital Realty Trust, L.P. $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)extension	Dec. 31, 2014USD ($)
Debt Instrument [Line Items]
Remainder of 2015	$ 71,052
2,016	216,979
2,017	1,896,506
2,018	593
2,019	644
Thereafter	2,800,973
Subtotal	4,986,747
Unamortized discounts	(18,432)
Unamortized net premiums	511
Total Indebtedness	4,968,826	$ 4,673,127
Global revolving credit facility
Debt Instrument [Line Items]
Remainder of 2015	0
2,016	0
2,017	777,013
2,018	0
2,019	0
Thereafter	0
Subtotal	777,013
Unamortized discounts	0
Unamortized net premiums	0
Total Indebtedness	$ 777,013
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Unsecured term loan
Debt Instrument [Line Items]
Remainder of 2015	$ 0
2,016	0
2,017	961,098
2,018	0
2,019	0
Thereafter	0
Subtotal	961,098
Unamortized discounts	0
Unamortized net premiums	0
Total Indebtedness	$ 961,098
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Prudential Shelf Facility:
Debt Instrument [Line Items]
Remainder of 2015	$ 0
2,016	25,000
2,017	50,000
2,018	0
2,019	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
2,016	0
2,017	0
2,018	0
2,019	0
Thereafter	2,799,840
Subtotal	2,799,840
Unamortized discounts	(18,432)	(15,632)
Unamortized net premiums	0
Total Indebtedness	2,781,408
Mortgage Loans
Debt Instrument [Line Items]
Remainder of 2015	71,052
2,016	191,979
2,017	108,395
2,018	593
2,019	644
Thereafter	1,133
Subtotal	373,796
Unamortized discounts	0
Unamortized net premiums	511	582
Total Indebtedness	$ 374,307	$ 378,818

Income per Share (Summary Of Ba

Income per Share (Summary Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 117,055	$ 41,510	$ 218,783	$ 75,696
Weighted average shares/units outstanding-basic (shares)	135,810,060	133,802,622	135,757,584	131,183,857
Stock options (shares)	30,601	45,278	31,402	43,023
Unvested incentive units	68,371	74,345	55,742	65,847
2014 market performance-based awards (shares)	589,972	55,640	416,267	27,820
Weighted average shares/units outstanding-diluted (shares)	136,499,004	133,977,885	136,260,995	131,320,547
Basic ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58
Diluted ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58

Income per Share (Schedule Of A

Income per Share (Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	19,206,574	23,030,697	19,239,871	23,534,545
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)	2,757,466	2,812,716	2,730,120	2,710,262

Income per Unit (Summary Of Bas

Income per Unit (Summary Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income available to common unitholders	$ 117,055	$ 41,510	$ 218,783	$ 75,696
Weighted average shares/units outstanding-basic (shares)	135,810,060	133,802,622	135,757,584	131,183,857
Stock options (units)	30,601	45,278	31,402	43,023
Unvested incentive units	68,371	74,345	55,742	65,847
2014 market performance-based awards (units)	589,972	55,640	416,267	27,820
Weighted average shares/units outstanding-diluted (shares)	136,499,004	133,977,885	136,260,995	131,320,547
Basic ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58
Diluted ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58
Digital Realty Trust, L.P.
Net income available to common unitholders	$ 119,432	$ 42,383	$ 223,186	$ 77,262
Weighted average shares/units outstanding-basic (shares)	138,567,526	136,615,338	138,487,704	133,894,119
Stock options (units)	30,601	45,278	31,402	43,023
Unvested incentive units	68,371	74,345	55,742	65,847
2014 market performance-based awards (units)	589,972	55,640	416,267	27,820
Weighted average shares/units outstanding-diluted (shares)	139,256,470	136,790,601	138,991,115	134,030,809
Basic ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58
Diluted ($ per share/unit)	$ 0.86	$ 0.31	$ 1.61	$ 0.58

Income per Unit (Schedule Of An

Income per Unit (Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	19,206,574	23,030,697	19,239,871	23,534,545
Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	16,449,108	20,217,981	16,509,751	20,824,283
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 | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	4,360,736	5,060,744	4,376,813	5,367,507
Series F Preferred Units | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	2,765,569	3,209,512	2,775,765	3,404,060
Series G Preferred Units | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	3,781,463	4,388,483	3,795,404	4,654,496
Series H Preferred Units | Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	5,541,340	6,437,332	5,561,769	3,449,841

Income Taxes (Details)

Income Taxes (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total
Income Tax Disclosure [Abstract]
Income distributed	100.00%
Net deferred tax liability	$ 139.4

Equity And Accumulated Other 62

Equity And Accumulated Other Comprehensive Income, Net (Equity Distribution Agreements) (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2011
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)	5.7
Equity distribution agreements at an average price ($ per share)	$ 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	$ 182,800,000	$ 179,000,000

Equity And Accumulated Other 63

Equity And Accumulated Other Comprehensive Income, Net (Ownership Interest In The Operating Partnership) (Details) - shares	Jun. 30, 2015	Dec. 31, 2014
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Partners' capital account units	135,832,492	135,626,255
Percentage of total	97.90%	97.80%
Common units held by third parties
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Common units held by third parties	1,425,314	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	1,505,666	1,549,847
Percentage of total	1.10%	1.10%
Noncontrolling Interests in Operating Partnership
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Partners' capital account units	138,763,472	138,639,916
Percentage of total	100.00%	100.00%

Equity And Accumulated Other 64

Equity And Accumulated Other Comprehensive Income, Net (Summary Of Activity For Noncontrolling Interests In The Operating Partnership) (Details)	6 Months Ended
	Jun. 30, 2015shares
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	(38,500)
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	(15,150)
Grant of incentive units to employees and directors	47,056
Ending balance	2,930,980
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	(38,500)
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	1,425,314
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	(15,150)
Grant of incentive units to employees and directors	47,056
Ending balance	1,505,666

Equity And Accumulated Other 65

Equity And Accumulated Other Comprehensive Income, Net (Schedule Of Dividends/Distributions) (Details) - 6 months ended Jun. 30, 2015 - USD ($) $ / shares in Units, $ in Thousands	Total
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
Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 10,062
Preferred stock dividend per share amount	$ 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 F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 6,046
Preferred stock dividend per share amount	$ 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 G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 7,344
Preferred stock dividend per share amount	$ 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 H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 13,460
Preferred stock dividend per share amount	$ 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
Common Stock
Dividends Payable [Line Items]
Dividends/Distributions, common units	$ 230,877
Common stock dividend per share amount	$ 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

Equity And Accumulated Other 66

Equity And Accumulated Other Comprehensive Income, Net (Schedule Of Accumulated Other Comprehensive Loss, Net) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	$ (45,046)
Net current period change	(23,751)
Reclassification to interest expense from interest rate swaps	1,473
Balance as of June 30, 2015	(67,324)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	(39,567)
Net current period change	(21,947)
Reclassification to interest expense from interest rate swaps	0
Balance as of June 30, 2015	(61,514)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	(5,479)
Net current period change	(1,804)
Reclassification to interest expense from interest rate swaps	1,473
Balance as of June 30, 2015	$ (5,810)

Capital And Accumulated Other67

Capital And Accumulated Other Comprehensive Income (Partnership Units) (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Digital Realty Trust, L.P.
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Redemption value of common units	$ 182.8	$ 179

Capital And Accumulated Other68

Capital And Accumulated Other Comprehensive Income (Schedule Of Dividends/Distributions) (Details) - 6 months ended Jun. 30, 2015 - USD ($)	Total
Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 10,062,000
Preferred stock dividend per share amount	$ 1.750
Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 6,046,000
Preferred stock dividend per share amount	$ 1.656
Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 7,344,000
Preferred stock dividend per share amount	$ 1.469
Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	$ 13,460,000
Preferred stock dividend per share amount	$ 1.844
Common Units
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	$ 235,834,000
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	$ 5,031,000
February 25, 2015 | Series E Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	5,031,000
February 25, 2015 | Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023,000
February 25, 2015 | Series F Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023,000
February 25, 2015 | Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672,000
February 25, 2015 | Series G Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672,000
February 25, 2015 | Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730,000
February 25, 2015 | Series H Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730,000
February 25, 2015 | Common Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	$ 117,896,000
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	$ 5,031,000
May 12, 2015 | Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,023,000
May 12, 2015 | Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	3,672,000
May 12, 2015 | Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	6,730,000
May 12, 2015 | Common Units
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	117,938,000
Annual rate | Series E Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	1.750
Annual rate | Series F Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	1.656
Annual rate | Series G Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	1.469
Annual rate | Series H Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred units	1.844
Annual rate | Common Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units	$ 3.400

Capital And Accumulated Other69

Capital And Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income (Loss)) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	$ (45,046)
Net current period change	(23,751)
Reclassification to interest expense from interest rate swaps	1,473
Balance as of June 30, 2015	(67,324)
Digital Realty Trust, L.P.
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(48,433)
Net current period change	(24,215)
Reclassification to interest expense from interest rate swaps	1,503
Balance as of June 30, 2015	(71,145)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(39,567)
Net current period change	(21,947)
Reclassification to interest expense from interest rate swaps	0
Balance as of June 30, 2015	(61,514)
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	(22,375)
Balance as of June 30, 2015	(64,513)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(5,479)
Net current period change	(1,804)
Reclassification to interest expense from interest rate swaps	1,473
Balance as of June 30, 2015	(5,810)
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	(1,840)
Reclassification to interest expense from interest rate swaps	1,503
Balance as of June 30, 2015	$ (6,632)

Incentive Plan (Narrative) (Det

Incentive Plan (Narrative) (Details) - USD ($) $ in Millions	May. 02, 2007	Jun. 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
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"		4,683,490

Incentive Plan (Long-Term Incen

Incentive Plan (Long-Term Incentive Units) (Narrative) (Details) - Long-Term Incentive Units - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 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	$ 1.8	$ 2	$ 3.1	$ 9.9
Capitalized expense related to construction and leasing activities	0.1	$ 0.4	1	$ 0.9
Unearned compensation	$ 7.4		$ 7.4		$ 9.3
Unearned compensation, period of recognition			794 days

Incentive Plan (Summary Of Long

Incentive Plan (Summary Of Long-Term Incentive Units) (Details) - 6 months ended Jun. 30, 2015 - Long-Term Incentive Units - $ / shares	Total
Long-Term Incentive Unit Activity [Roll Forward]
Unvested Shares, beginning of period, Shares	314,415
Unvested Shares, Granted, Shares	47,056
Unvested Shares, Vested, Shares	(157,300)
Unvested Shares, Cancelled or expired, Shares	(15,150)
Unvested Shares, end of period, Shares	189,021
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share)	$ 59.34
Unvested Shares, Granted, Weighted-Average Grant Date Fair Value ($ per share)	64.81
Unvested Shares, Vested, Weighted-Average Grant Date Fair Value ($ per share)	60.25
Unvested Shares, Cancelled or expired, Weighted-Average Grant Date Fair Value ($ per share)	58.26
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share)	$ 60.04

Incentive Plan (Performance Bas

Incentive Plan (Performance Based Awards) (Narrative) (Details) simulation in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)simulationshares	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)
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	$ 21.7		$ 21.7		$ 9.5
Recognized compensation expense	2.1	$ 1	3.3	$ 1.4
Capitalized expense related to construction and leasing activities	$ 0.6	$ 0.4	$ 1	$ 0.6
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%

Incentive Plan (Market Performa

Incentive Plan (Market Performance Based Awards) (Details)	6 Months Ended
	Jun. 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%

Incentive Plan (Summary Of Ince

Incentive Plan (Summary Of Incentive Award Plan's Stock Option) (Details) - Jun. 30, 2015 - $ / shares	Total
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning of period, Shares	80,933
Exercised, Shares	(11,961)
Options outstanding, end of period, Shares	68,972
Exercisable, end of period, Shares	68,972
Options outstanding, beginning of period, Weighted average exercise price ($ per share)	$ 37.25
Exercised, Weighted average exercise price ($ per share)	41.19
Options outstanding, end of period, Weighted average exercise price ($ per share)	36.57
Exercisable, end of period, Weighted average exercise price ($ per share)	$ 36.57

Incentive Plan (Summary Of Stoc

Incentive Plan (Summary Of Stock Options Outstanding And Exercisable) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding (shares)	68,972	80,933
Weighted-average remaining contractual life (years)	543 days
Weighted average exercise price, Outstanding ($ per share)	$ 36.57
Aggregate intrinsic value	$ 2,076,948
$ 20.37
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit	$ 20.37
Exercise price, upper limit	$ 20.37
Number outstanding (shares)	15,000
Weighted-average remaining contractual life (years)	131 days
Weighted average exercise price, Outstanding ($ per share)	$ 20.37
Aggregate intrinsic value	$ 694,650
$33.18-41.73
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower limit	$ 33.18
Exercise price, upper limit	$ 41.73
Number outstanding (shares)	53,972
Weighted-average remaining contractual life (years)	657 days
Weighted average exercise price, Outstanding ($ per share)	$ 41.07
Aggregate intrinsic value	$ 1,382,298

Incentive Plan (Restricted Stoc

Incentive Plan (Restricted Stock) (Narrative) (Details) - Restricted Stock - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock expense	$ 0.7	$ 0.6	$ 1.2	$ 1.4
Capitalized expense related to construction and leasing activities	0.8	$ 0.8	1.5	$ 1.6
Unearned compensation	$ 13.5		$ 13.5		$ 10.4
Unearned compensation, period of recognition			1009 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

Incentive Plan (Summary Of Rest

Incentive Plan (Summary Of Restricted Stock Activity) (Details) - 6 months ended Jun. 30, 2015 - Restricted Stock - $ / shares	Total
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	300,502
Unvested Shares, Granted, Shares	101,227
Unvested Shares, Vested, Shares	(88,869)
Unvested Shares, Cancelled or expired, Shares	(19,742)
Unvested Shares, end of period, Shares	293,118
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share)	$ 57.10
Unvested Shares, Granted, Weighted-Average Grant Date Fair Value ($ per share)	66.72
Unvested Shares, Vested, Weighted-Average Grant Date Fair Value ($ per share)	59.45
Unvested Shares, Cancelled or expired, Weighted-Average Grant Date Fair Value ($ per share)	58.99
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share)	$ 60.91

Derivative Instruments (Details

Derivative Instruments (Details) $ in Thousands	Jan. 13, 2015USD ($)	Jan. 31, 2014	Jun. 30, 2015USD ($)$ / SGD	Mar. 31, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)$ / SGD	Jun. 30, 2014USD ($)	Dec. 31, 2014USD ($)$ / SGD
Derivative [Line Items]
Notional Amount			$ 476,552			$ 476,552		$ 703,870
Fair Value at Significant Other Observable Inputs (Level 2)			(115)			(115)		$ (2,409)
Interest Expense			$ 46,114		$ 49,146	91,580	$ 96,520
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash flow hedge adjustments
Derivative [Line Items]
Interest Expense						$ 2,300
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			0.74			0.74		0.75
Currently-paying contracts
Derivative [Line Items]
Notional Amount			$ 476,552			$ 476,552		$ 553,870
Fair Value at Significant Other Observable Inputs (Level 2)			(115)			(115)		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)			$ (999)			$ (999)		(241)
Currently-paying contracts | Swap 2
Derivative [Line Items]
Notional Amount			$ 140,647			$ 140,647		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)			$ 884			$ 884		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)

Fair Value Of Instruments (Esti

Fair Value Of Instruments (Estimated Fair Value And Carrying Amounts) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 23, 2015	Dec. 31, 2014
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	$ 3,002,157		$ 2,968,073
Mortgage Loans	391,893		399,569
Long-term Debt, Fair Value	5,132,161		4,870,193
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	2,856,408		2,791,758
Mortgage Loans	374,307		378,818
Long-term Debt, Fair Value	4,968,826		4,673,127
Global revolving credit facility | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	777,013		525,951
Global revolving credit facility | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	777,013		525,951
Unsecured term loan | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	961,098		976,600
Unsecured term loan | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	961,098		976,600
Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 18,432		$ 15,632
3.625% notes due 2022 | Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	3.625%
3.950% notes due 2022 | Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	3.95%	3.95%

Commitments and Contingencies (

Commitments and Contingencies (Details) £ in Millions, SGD in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2015SGD	Jun. 30, 2014USD ($)	Jun. 30, 2014GBP (£)	Jun. 30, 2015USD ($)	Jun. 30, 2015GBP (£)	Jun. 30, 2015SGD	Jun. 30, 2014USD ($)	Jun. 30, 2015GBP (£)	Dec. 31, 2014USD ($)	Jul. 11, 2012USD ($)	Jul. 11, 2012GBP (£)
Commitments and Contingencies [Line Items]
Accounts payable and other accrued liabilities	$ 516,232,000				$ 516,232,000					$ 605,923,000
Reduction in fair value | £						£ 30.3
Change in fair value of contingent consideration	352,000		$ 766,000		(42,682,000)			$ (2,637,000)
Commitments related to construction contracts	113,400,000				113,400,000
Sentrum Portfolio
Commitments and Contingencies [Line Items]
Additional performance based consideration earned (maximum)			5,700,000	£ 3.4
Contingent liability	2,100,000				2,100,000				£ 1.4		$ 87,600,000	£ 56.5
Change in fair value of contingent consideration	0		$ 766,000		(43,034,000)			$ (2,637,000)
29 A International Business Park
Commitments and Contingencies [Line Items]
Accounts payable and other accrued liabilities	12,400,000				12,400,000					$ 12,400,000
Earnout payments	13,000,000	SGD 17.5
Additional performance based consideration earned (maximum)					37,100,000		SGD 50
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

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Jul. 22, 2015	Jul. 14, 2015	Sep. 30, 2015	Dec. 31, 2015	Jun. 30, 2015	Jul. 13, 2015
Subsequent Event [Line Items]
Payments to acquire business					$ 46.6
Subsequent Event
Subsequent Event [Line Items]
Proceeds from common stock issuance		$ 686.4
Subsequent Event | Separation Arrangement With Former Employee
Subsequent Event [Line Items]
Cancelled (units)	127,644
Cash payment	$ 8
Previously accrued					$ 12.7
Excess accrual to be reversed			$ 4.7
Subsequent Event | Common Stock
Subsequent Event [Line Items]
Issued (shares)		10,500,000
Over-allotment option		30 days
Subsequent Event | Common Stock | Forward Equity Sale
Subsequent Event [Line Items]
Issued (shares)		3,500,000
Issued ($ per share)						$ 65.28
Subsequent Event | Common Stock | Over-Allotment Option
Subsequent Event [Line Items]
Issued (shares)		1,575,000
Subsequent Event | Telx | Senior Unsecured Bridge Loan Facility in Connection With Tex Acquisition
Subsequent Event [Line Items]
Credit facility						$ 1,850
Scenario, Forecast | Subsequent Event | Telx
Subsequent Event [Line Items]
Voting interest acquired				100.00%
Payments to acquire business				$ 1,886