Digital Realty Trust 10-Q 6 Nov 15 2015 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 30, 2015
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
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		146,343,684
Digital Realty Trust, L.P.
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
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	Sep. 30, 2015	Dec. 31, 2014
Properties:
Land	$ 640,971	$ 671,602
Acquired ground leases	12,950	12,196
Buildings and improvements	8,980,621	8,823,814
Tenant improvements	542,652	475,000
Total investments in properties	10,177,194	9,982,612
Accumulated depreciation and amortization	(2,137,631)	(1,874,054)
Net investments in properties	8,039,563	8,108,558
Investment in unconsolidated joint ventures	103,703	94,729
Net investments in real estate	8,143,266	8,203,287
Cash and cash equivalents	22,998	34,814
Accounts and other receivables, net of allowance for doubtful accounts	157,994	135,931
Deferred rent	475,796	447,643
Acquired above-market leases, net	30,617	38,605
Acquired in-place lease value and deferred leasing costs, net	405,824	456,962
Deferred financing costs, net	29,173	30,821
Restricted cash	12,500	18,062
Assets held for sale	173,461	120,471
Other assets	49,384	40,188
Total assets	9,501,013	9,526,784
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	2,816,359	2,791,758
Mortgage loans, including premiums	304,987	378,818
Accounts payable and other accrued liabilities	513,555	605,923
Accrued dividends and distributions	0	115,019
Acquired below-market leases, net	88,632	104,235
Security deposits and prepaid rents	107,704	108,478
Obligations associated with assets held for sale	6,892	5,764
Total liabilities	$ 5,465,362	$ 5,612,546
Commitments and contingencies
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Common Stock: $0.01 par value, 215,000,000 shares authorized, 135,843,684 and 135,626,255 shares issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	$ 1,351	$ 1,349
Additional paid-in capital	3,977,945	3,970,439
Accumulated dividends in excess of earnings	(1,185,633)	(1,096,607)
Accumulated other comprehensive loss, net	(87,988)	(45,046)
Total stockholders’ equity	3,995,479	3,878,256
Noncontrolling Interests:
Noncontrolling interests in operating partnership	33,411	29,191
Noncontrolling interests in consolidated joint ventures	6,761	6,791
Total noncontrolling interests	40,172	35,982
Total equity	4,035,651	3,914,238
Total liabilities and equity/capital	9,501,013	9,526,784
Digital Realty Trust, L.P.
Properties:
Land	640,971	671,602
Acquired ground leases	12,950	12,196
Buildings and improvements	8,980,621	8,823,814
Tenant improvements	542,652	475,000
Total investments in properties	10,177,194	9,982,612
Accumulated depreciation and amortization	(2,137,631)	(1,874,054)
Net investments in properties	8,039,563	8,108,558
Investment in unconsolidated joint ventures	103,703	94,729
Net investments in real estate	8,143,266	8,203,287
Cash and cash equivalents	22,998	34,814
Accounts and other receivables, net of allowance for doubtful accounts	157,994	135,931
Deferred rent	475,796	447,643
Acquired above-market leases, net	30,617	38,605
Acquired in-place lease value and deferred leasing costs, net	405,824	456,962
Deferred financing costs, net	29,173	30,821
Restricted cash	12,500	18,062
Assets held for sale	173,461	120,471
Other assets	49,384	40,188
Total assets	9,501,013	9,526,784
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	2,816,359	2,791,758
Mortgage loans, including premiums	304,987	378,818
Accounts payable and other accrued liabilities	513,702	605,923
Due to Parent	242,689	0
Accrued dividends and distributions	0	115,019
Acquired below-market leases, net	88,632	104,235
Security deposits and prepaid rents	107,704	108,478
Obligations associated with assets held for sale	6,892	5,764
Total liabilities	$ 5,708,198	$ 5,612,546
Commitments and contingencies
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
135,843,684 and 135,626,255 units issued and outstanding as of September 30, 2015 and December 31, 2014, respectively	$ 2,792,510	$ 2,875,181
Limited partners, 1,421,314 and 1,463,814 common units, 1,035,062 and 1,170,610 profits interest units and 379,237 and 379,237 class C units outstanding as of September 30, 2015 and December 31, 2014, respectively	37,633	32,578
Accumulated other comprehensive loss, net	(92,210)	(48,433)
Total partners’ capital	3,786,054	3,907,447
Noncontrolling Interests:
Noncontrolling interests in consolidated joint ventures	6,761	6,791
Total capital	3,792,815	3,914,238
Total liabilities and equity/capital	9,501,013	9,526,784
Series E Preferred Units
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	277,172	277,172
Series E Preferred Units | Digital Realty Trust, L.P.
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	277,172	277,172
Series F Preferred Units
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	176,191	176,191
Series F Preferred Units | Digital Realty Trust, L.P.
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	176,191	176,191
Series G Preferred Units
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	241,468	241,468
Series G Preferred Units | Digital Realty Trust, L.P.
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	241,468	241,468
Series H Preferred Units
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	353,290	353,290
Series H Preferred Units | Digital Realty Trust, L.P.
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	353,290	353,290
Series I Preferred Stock
Preferred Stock: $0.01 par value per share, 70,000,000 shares authorized:
Preferred Stock	241,683	0
Global revolving credit facility
LIABILITIES AND EQUITY
Line of credit	688,957	525,951
Global revolving credit facility | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	688,957	525,951
Unsecured term loan
LIABILITIES AND EQUITY
Line of credit	938,276	976,600
Unsecured term loan | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	$ 938,276	$ 976,600

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Accounts and other receivables, net of allowance for doubtful accounts	$ 7,041,000	$ 6,302,000
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, authorized	70,000,000	70,000,000
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, authorized	215,000,000	215,000,000
Common Stock, Shares, Issued	135,843,684	135,626,255
Common Stock, Shares, Outstanding	135,843,684	135,626,255
Series E Preferred Units
Preferred Stock, dividend rate	7.00%	7.00%
Preferred Stock, liquidation preference value	$ 287,500,000	$ 287,500,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, issued (shares)	11,500,000	11,500,000
Preferred Stock, outstanding	11,500,000	11,500,000
Series F Preferred Units
Preferred Stock, dividend rate	6.625%	6.625%
Preferred Stock, liquidation preference value	$ 182,500,000	$ 182,500,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, issued (shares)	7,300,000	7,300,000
Preferred Stock, outstanding	7,300,000	7,300,000
Series G Preferred Units
Preferred Stock, dividend rate	5.875%	5.875%
Preferred Stock, liquidation preference value	$ 250,000,000	$ 250,000,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, issued (shares)	10,000,000	10,000,000
Preferred Stock, outstanding	10,000,000	10,000,000
Series H Preferred Units
Preferred Stock, dividend rate	7.375%	7.375%
Preferred Stock, liquidation preference value	$ 365,000,000	$ 365,000,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 25
Preferred stock, issued (shares)	14,600,000	14,600,000
Preferred Stock, outstanding	14,600,000	14,600,000
Series I Preferred Stock
Preferred Stock, dividend rate	6.35%
Preferred Stock, liquidation preference value	$ 250,000,000	$ 0
Preferred Stock, liquidation preference per share/unit	$ 25	$ 0
Preferred stock, issued (shares)	10,000,000	0
Preferred Stock, outstanding	10,000,000	0
Digital Realty Trust, L.P.
Accounts and other receivables, net of allowance for doubtful accounts	$ 7,041,000	$ 6,302,000
Common Units, issued	135,843,684	135,626,255
Common Units, outstanding	135,843,684	135,626,255
Limited Partners, common units	1,421,314	1,463,814
Limited Partners, profits interest units	1,035,062	1,170,610
Limited Partners, Class C units outstanding	379,237	379,237
Digital Realty Trust, L.P. | Series E Preferred Units
Preferred Stock, dividend rate	7.00%	7.00%
Preferred Stock, liquidation preference value	$ 287,500,000	$ 287,500,000
Preferred Stock, liquidation preference per share/unit	$ 25	$ 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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating Revenues:
Rental	$ 338,330	$ 317,064	$ 988,172	$ 936,270
Tenant reimbursements	95,484	92,209	268,885	261,517
Fee income	1,595	2,748	4,758	5,397
Other	580	165	1,078	1,038
Total operating revenues	435,989	412,186	1,262,893	1,204,222
Operating Expenses:
Rental property operating and maintenance	140,538	130,894	394,640	375,586
Property taxes	19,953	25,765	64,116	68,485
Insurance	2,140	2,145	6,449	6,463
Change in fair value of contingent consideration	(1,594)	(1,465)	(44,276)	(4,102)
Depreciation and amortization	136,974	137,474	397,571	405,186
General and administrative	22,755	20,709	69,562	71,708
Transactions	11,042	144	14,301	980
Impairment of investments in real estate	0	12,500	0	12,500
Other	51	1,648	29	2,584
Total operating expenses	331,859	329,814	902,392	939,390
Operating income	104,130	82,372	360,501	264,832
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	4,169	3,455	12,170	9,513
Gain (loss) on sale of properties	(207)	0	94,282	15,945
Gain on contribution of properties to unconsolidated joint ventures	0	93,498	0	95,404
Interest and other income (expense)	(358)	378	(2,879)	2,022
Interest expense	(48,138)	(48,169)	(139,718)	(144,689)
Tax expense	(1,754)	(1,178)	(6,044)	(4,037)
Loss from early extinguishment of debt	0	(195)	(148)	(780)
Net income	57,842	130,161	318,164	238,210
Net income attributable to noncontrolling interests	(864)	(2,392)	(5,492)	(4,190)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	56,978	127,769	312,672	234,020
Preferred stock/unit dividends/distributions	(18,456)	(18,455)	(55,367)	(49,010)
Net income available to common stock/unitholders	$ 38,522	$ 109,314	$ 257,305	$ 185,010
Net income per share/unit available to common stockholders/unitholders:
Basic ($ per share/unit)	$ 0.28	$ 0.81	$ 1.89	$ 1.39
Diluted ($ per share/unit)	$ 0.28	$ 0.80	$ 1.88	$ 1.39
Weighted average common shares/units outstanding:
Weighted average shares/units outstanding-basic (shares)	135,832,503	135,492,618	135,782,831	132,635,894
Weighted average shares/units outstanding-diluted (shares)	138,259,936	135,946,533	136,920,477	132,852,966
Digital Realty Trust, L.P.
Operating Revenues:
Rental	$ 338,330	$ 317,064	$ 988,172	$ 936,270
Tenant reimbursements	95,484	92,209	268,885	261,517
Fee income	1,595	2,748	4,758	5,397
Other	580	165	1,078	1,038
Total operating revenues	435,989	412,186	1,262,893	1,204,222
Operating Expenses:
Rental property operating and maintenance	140,538	130,894	394,640	375,586
Property taxes	19,953	25,765	64,116	68,485
Insurance	2,140	2,145	6,449	6,463
Change in fair value of contingent consideration	(1,594)	(1,465)	(44,276)	(4,102)
Depreciation and amortization	136,974	137,474	397,571	405,186
General and administrative	22,755	20,709	69,562	71,708
Transactions	11,042	144	14,301	980
Impairment of investments in real estate	0	12,500	0	12,500
Other	51	1,648	29	2,584
Total operating expenses	331,859	329,814	902,392	939,390
Operating income	104,130	82,372	360,501	264,832
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	4,169	3,455	12,170	9,513
Gain (loss) on sale of properties	(207)	0	94,282	15,945
Gain on contribution of properties to unconsolidated joint ventures	0	93,498	0	95,404
Interest and other income (expense)	(358)	378	(2,879)	2,022
Interest expense	(49,291)	(48,169)	(140,871)	(144,689)
Tax expense	(1,754)	(1,178)	(6,044)	(4,037)
Loss from early extinguishment of debt	0	(195)	(148)	(780)
Net income	56,689	130,161	317,011	238,210
Net income attributable to noncontrolling interests	(117)	(120)	(342)	(352)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	56,572	130,041	316,669	237,858
Preferred stock/unit dividends/distributions	(18,456)	(18,455)	(55,367)	(49,010)
Net income available to common stock/unitholders	$ 38,116	$ 111,586	$ 261,302	$ 188,848
Net income per share/unit available to common stockholders/unitholders:
Basic ($ per share/unit)	$ 0.28	$ 0.81	$ 1.89	$ 1.39
Diluted ($ per share/unit)	$ 0.27	$ 0.80	$ 1.88	$ 1.39
Weighted average common shares/units outstanding:
Weighted average shares/units outstanding-basic (shares)	138,467,947	138,308,130	138,481,046	135,381,624
Weighted average shares/units outstanding-diluted (shares)	139,192,198	138,762,045	139,050,965	135,598,696

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 57,842	$ 130,161	$ 318,164	$ 238,210
Other comprehensive income:
Foreign currency translation adjustments	(19,105)	(39,470)	(41,480)	(30,730)
Increase (decrease) in fair value of interest rate swaps	(2,534)	2,435	(4,374)	(3,647)
Reclassification to interest expense from interest rate swaps	574	867	2,077	2,567
Comprehensive income	36,777	93,993	274,387	206,400
Comprehensive income attributable to noncontrolling interests	(463)	(1,656)	(4,657)	(3,541)
Comprehensive income attributable to Digital Realty Trust, Inc.	36,314	92,337	269,730	202,859
Digital Realty Trust, L.P.
Net income	56,689	130,161	317,011	238,210
Other comprehensive income:
Foreign currency translation adjustments	(19,105)	(39,470)	(41,480)	(30,730)
Increase (decrease) in fair value of interest rate swaps	(2,534)	2,435	(4,374)	(3,647)
Reclassification to interest expense from interest rate swaps	574	867	2,077	2,567
Comprehensive income	$ 35,624	$ 93,993	$ 273,234	$ 206,400

Condensed Consolidated Stateme6

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

Consolidated Statement Of Capit

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

Condensed Consolidated Stateme8

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

Condensed Consolidated Stateme9

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

Organization And Description Of

Organization And Description Of Business	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization And Description Of Business	Organization and Description of Business Digital Realty Trust, Inc. through its controlling interest in Digital Realty Trust, L.P. (the Operating Partnership) and the subsidiaries of the Operating Partnership (collectively, we, our, us or the Company) is engaged in the business of owning, acquiring, developing and managing technology-related real estate. The Company is focused on providing data center and colocation solutions for domestic and international tenants across a variety of industry verticals ranging from financial services, cloud and information technology services, to manufacturing, energy, healthcare, and consumer products. As of September 30, 2015 , our portfolio consisted of 132 properties, including eight properties held for sale, 14 properties held as investments in unconsolidated joint ventures and developable land, of which 103 are located throughout North America, 23 are located in Europe, three are located in Australia and three are located in Asia. We are diversified in major metropolitan areas where corporate data center and technology tenants are concentrated, including the Boston, Chicago, Dallas, Los Angeles, New York Metro, Northern Virginia, Phoenix, San Francisco and Silicon Valley metropolitan areas in the United States, the Amsterdam, Dublin, London and Paris metropolitan areas in Europe and the Singapore, Sydney, Melbourne, Hong Kong and Osaka metropolitan areas in the Asia Pacific region. The portfolio consists of Internet gateway and corporate data center properties, technology manufacturing properties and regional or national offices of technology companies. The Operating Partnership was formed on July 21, 2004 in anticipation of Digital Realty Trust, Inc.’s initial public offering (IPO) on November 3, 2004 and commenced operations on that date. As of September 30, 2015 , Digital Realty Trust, Inc. owns a 98.0% common interest and a 100.0% preferred interest in the Operating Partnership. As sole general partner of the Operating Partnership, Digital Realty Trust, Inc. has the full, exclusive and complete responsibility for the Operating Partnership’s day-to-day management and control. The limited partners of the Operating Partnership do not have rights to replace Digital Realty Trust, Inc. as the general partner nor do they have participating rights, although they do have certain protective rights. On October 9, 2015, we completed the acquisition of Telx Holdings, Inc. from private equity firms ABRY Partners and Berkshire Partners. See Note 17 "Subsequent Events" for further discussion of the acquisition.

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies (a) Principles of Consolidation and Basis of Presentation The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated. The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014 . The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits: • enhancing investors’ understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business; • eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and • creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes. There are a few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how we operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership and a $242.7 million intercompany loan, which was repaid subsequent to the period covered by this report. As a result, Digital Realty Trust, Inc. generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public securities from time to time and guaranteeing certain unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates. Digital Realty Trust, Inc. itself has not issued any indebtedness but guarantees the unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates, as disclosed in these notes. The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company’s joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units or loaned to Digital Realty Trust, L.P. on a temporary basis prior to contribution in exchange for partnership units, the Operating Partnership generally generates the capital required by the Company’s business primarily through the Operating Partnership’s operations, by the Operating Partnership’s or its affiliates’ direct or indirect incurrence of indebtedness or through the issuance of partnership units. The presentation of noncontrolling interests in operating partnership, stockholders’ equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners’ capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner’s capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels. To help investors understand the significant differences between the Company and the Operating Partnership, these consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership: • condensed consolidated face financial statements; and • the following notes to the condensed consolidated financial statements: • "Debt of the Company" and "Debt of the Operating Partnership"; • "Income per Share" and "Income per Unit"; and • "Equity and Accumulated Other Comprehensive Income, Net" and "Capital and Accumulated Other Comprehensive Income". In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company generally operates the business through the Operating Partnership. (b) Cash Equivalents For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of September 30, 2015 , cash equivalents consist of investments in money market instruments. (c) Investment in Unconsolidated Joint Ventures The Company’s investment in unconsolidated joint ventures is accounted for using the equity method, whereby the investment is increased for capital contributed and our share of the joint ventures’ net income and decreased by distributions we receive and our share of any losses of the joint ventures. We amortize the difference between the cost of our investments in unconsolidated joint ventures and the book value of the underlying equity into equity in earnings from unconsolidated affiliates on a straight-line basis consistent with the lives of the underlying assets. (d) Capitalization of Costs Direct and indirect project costs that are clearly associated with the development of properties are capitalized as incurred. Project costs include all costs directly associated with the development of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development are not capitalized and are charged to expense as incurred. Capitalization of costs begins when the activities necessary to get the development project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development project is substantially complete and ready for its intended use. Determining when a development project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development project to be substantially complete and ready for its intended use upon receipt of a certificate of occupancy. If and when development of a property is suspended pursuant to a formal change in the planned use of the property, we will evaluate whether the accumulated costs exceed the estimated value of the project and write off the amount of any such excess accumulated costs. For a development project that is suspended for reasons other than a formal change in the planned use of such property, the accumulated project costs are evaluated for impairment consistent with our impairment policies for long-lived assets. Capitalized costs are allocated to the specific components of a project that are benefited. We capitalized interest of approximately $2.4 million and $5.4 million during the three months ended September 30, 2015 and 2014 , respectively, and $9.9 million and $15.6 million during the nine months ended September 30, 2015 and 2014 , respectively. We capitalized amounts relating to compensation and other overhead expense of employees direct and incremental to construction and successful leasing activities of approximately $18.2 million and $14.4 million , during the three months ended September 30, 2015 and 2014 , respectively, and $46.6 million and $42.3 million during the nine months ended September 30, 2015 and 2014 , respectively. Capitalized leasing costs of approximately $37.8 million and $37.1 million are included in improvements to investments in real estate in cash flows from investing activities in the condensed consolidated statements of cash flows for the nine months ended September 30, 2015 and 2014 , respectively. (e) Share-Based Compensation The Company measures all share-based compensation awards at fair value on the date they are granted to employees and directors, and recognizes compensation cost, net of forfeitures, over the requisite service period for awards with only a service condition. The estimated fair value of the long-term incentive units and Class D Units (discussed in Note 13 "Incentive Plan") granted by us is being amortized on a straight-line basis over the expected service period. The fair value of share-based compensation awards that contain a market condition is measured using a Monte Carlo simulation method and not adjusted based on actual achievement of the performance goals. (f) Income Taxes Digital Realty Trust, Inc. has elected to be treated as a real estate investment trust (a “REIT”) for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. generally is not required to pay federal corporate income tax to the extent taxable income is currently distributed to its stockholders. If Digital Realty Trust, Inc. fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates. The Company is subject to foreign, state and local income taxes in the jurisdictions in which it conducts business. The Company’s U.S. consolidated taxable REIT subsidiaries are subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes current and deferred income taxes for its taxable REIT subsidiaries, certain states and non-U.S. jurisdictions, as appropriate. We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered “more-likely-than-not” to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of September 30, 2015 and December 31, 2014 , we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated income statements. For the three and nine months ended September 30, 2015 and 2014 , we had no such interest or penalties. The tax year 2012 and thereafter remain open to examination by the major taxing jurisdictions with which the Company files tax returns. See Note 10 "Income Taxes" for further discussion on income taxes. (g) Presentation of Transactional-based Taxes We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis. (h) Fee Income Occasionally, customers engage the company for certain services. The nature of these services historically involves property management, construction management, and assistance with financing. The proper revenue recognition of these services can be different, depending on whether the arrangements are service revenue or contractor type revenue. Service revenues are typically recognized on an equal monthly basis based on the minimum fee to be earned. The monthly amounts could be adjusted depending on if certain performance milestones are met. Fee income also includes management fees. These fees arise from contractual agreements with entities in which we have a noncontrolling interest. The management fees are recognized as earned under the respective agreements. Management and other fee income related to partially owned entities are recognized to the extent attributable to the unaffiliated interest. (i) Assets and Liabilities Measured at Fair Value Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy). Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the lowest level input that is significant would be used to determine the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability. (j) Transactions Expense Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and significant transactions. (k) Gains on Sale of Properties Gains on sale of properties are recognized using the full accrual or partial sale methods, as applicable, in accordance with U.S. GAAP, provided various criteria relating to the terms of sale and any subsequent involvement with the real estate sold are satisfied. (l) Management’s Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to the valuation of our real estate properties, contingent consideration, accounts receivable and deferred rent receivable, performance-based equity compensation plans, the completeness of accrued liabilities and Digital Realty Trust, Inc.’s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions. (m) Segment and Geographic Information All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of real estate services provided to them are standardized throughout the portfolio. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment. Operating revenues from properties in the United States were $334.5 million and $314.9 million and outside the United States were $101.4 million and $97.3 million for the three months ended September 30, 2015 and 2014, respectively. Operating revenues from properties in the United States were $971.6 million and $915.7 million and outside the United States were $291.3 million and $288.6 million for the nine months ended September 30, 2015 and 2014, respectively. We had long-lived assets located in the United States of $5.4 billion and $5.4 billion and outside the United States of $2.6 billion and $2.7 billion as of September 30, 2015 and December 31, 2014, respectively. Operating revenues from properties located in the United Kingdom were $55.2 million and $55.1 million , or 12.7% and 13.4% of total operating revenues, for the three months ended September 30, 2015 and 2014, respectively. Operating revenues from properties located in the United Kingdom were $160.1 million and $164.5 million , or 12.7% and 13.7% of total operating revenues, for the nine months ended September 30, 2015 and 2014, respectively. No other foreign country comprised more than 10% of total operating revenues for each of these periods. We had long-lived assets located in the United Kingdom of $1.7 billion and $1.7 billion , or 20.9% and 21.3% of total long-lived assets, as of September 30, 2015 and December 31, 2014, respectively. No other foreign country comprised more than 10% of total long-lived assets as of September 30, 2015 and December 31, 2014. (n) Reclassifications Certain reclassifications of prior year amounts have been made to conform to the current year presentation. During the three and nine months ended September 30, 2014 , $0.1 million and $0.3 million , respectively, were reclassified from rental property operating and maintenance expense to other expense. Additionally, as of December 31, 2014, $6.5 million was reclassified from cash and cash equivalents to restricted cash to correct an immaterial classification error related to certain bank accounts for which certain mortgage lenders have disbursement approval rights. (o) Recent Accounting Pronouncements In February 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which provides guidance on the consolidation evaluation for reporting organizations that are required to evaluate whether they should consolidate certain legal entities. In accordance with the guidance, all legal entities are subject to reevaluation under the revised consolidation model. The guidance is effective in the first quarter of 2016, and early adoption is permitted. We are currently evaluating the potential impact of the adoption of ASU 2015-02 on our consolidated financial statements. On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however, if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. We are currently assessing the impact of the guidance on our consolidated financial statements. On April 17, 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs , which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the associated debt liability. Currently, debt issuance costs are recorded as an asset and amortization of these deferred financing costs is recorded in interest expense. Under the new standard, debt issuance costs will continue to be amortized over the life of the debt instrument and amortization will continue to be recorded in interest expense. The new standard is effective for the Company on January 1, 2016 and will be applied on a retrospective basis. The Company is currently evaluating ASU 2015-03, and anticipates a change in our presentation only since the standard does not alter the accounting for debt issuance costs. In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement Period Adjustments (Topic 805) . ASU 2015-16 requires an acquirer in a business combination to recognize provisional amounts when measurements were incomplete as of the end of a reporting period as an adjustment in the reporting period in which the provisional amount is determined. Prior to this standard, the acquirer was required to adjust such provisional amounts by restating prior period financial statements. ASU 2015-16 is effective for the annual period ending December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The Company elected to early adopt this standard effective with the interim period beginning July 1, 2015 and this standard did not have a material effect on the consolidated financial statements.

Investments In Real Estate

Investments In Real Estate	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Investments In Real Estate	Investments in Real Estate We acquired the following real estate properties during the nine months ended September 30, 2015 : Location Metropolitan Area Date Acquired Amount (1) Deer Park 3 (2) Melbourne April 15, 2015 $ 1.6 3 Loyang Way (3)(4) Singapore June 25, 2015 45.0 $ 46.6 (1) Purchase price in U.S. dollars and excludes capitalized closing costs on land acquisitions. Purchase prices for acquisitions outside the United States are based on the exchange rate at the date of acquisition. (2) Represents currently vacant land which is not included in our operating property count. (3) Represents a development property with an existing shell, which is included in our operating property count. This acquisition lacked key inputs to qualify as a business combination under purchase accounting guidance, and has therefore been accounted for as an asset acquisition, not a business combination. (4) Property is subject to a ground lease, which expires in February 2024, with a renewal provision of an additional 28 years upon satisfaction of certain requirements. Dispositions We sold the following real estate properties during the nine months ended September 30, 2015 : Location Metropolitan Area Date Sold Gross Proceeds (in millions) Gain on Sale (in millions) 100 Quannapowitt Parkway Boston February 5, 2015 $ 31.1 $ 10.1 3300 East Birch Street Los Angeles March 31, 2015 14.2 7.5 833 Chestnut Street Philadelphia April 30, 2015 160.8 (1) 76.7 $ 206.1 $ 94.3 (1) Gross proceeds includes a $9.0 million note receivable, which is expected to be collected by year-end. We have identified certain non-core investment properties we intend to sell as part of our capital recycling strategy. Our capital recycling program is designed to identify non-strategic and underperforming assets that can be sold to generate proceeds that will support the funding of our core investment activity. We expect our capital recycling initiative will likewise have a meaningfully positive impact on overall return on invested capital. In addition, our capital recycling program does not represent a strategic shift, as we are not entirely exiting regions or property types. During this process, we are evaluating the carrying value of certain investment properties identified for potential sale to ensure the carrying value is recoverable in light of a potentially shorter holding period. As a result of our evaluation, during the year ended December 31, 2014, we recognized approximately $126.5 million of impairment losses on five properties located in the Central, East and West regions. The fair value of the five properties were primarily based on discounted cash flow analysis, and in certain cases, we supplemented the analysis by obtaining broker opinions of value. As of September 30, 2015 , three of these five properties met the criteria to be classified as held for sale. As of September 30, 2015 , the Company had taken the necessary actions to conclude that an additional five properties (in addition to the three properties referenced above) to be disposed of as part of our capital recycling strategy met the criteria to be classified as held for sale. As of September 30, 2015 , these eight properties had an aggregate carrying value of $173.5 million within total assets and $6.9 million within total liabilities and are shown as assets held for sale and obligations associated with assets held for sale on the condensed consolidated balance sheet. The eight properties are not representative of a significant component of our portfolio, nor do the potential sales represent a significant shift in our strategy.

Investment In Unconsolidated Jo

Investment In Unconsolidated Joint Ventures	9 Months Ended
	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Investment In Unconsolidated Joint Ventures	Investment in Unconsolidated Joint Ventures As of September 30, 2015 , our investment in unconsolidated joint ventures consists of effective 50% interests in three joint ventures that own data center properties at 2001 Sixth Avenue in Seattle, Washington, 2020 Fifth Avenue in Seattle, Washington and 33 Chun Choi Street in Hong Kong, and effective 20% interests in two joint ventures, one of which owns 10 data center properties with an investment fund managed by Prudential Real Estate Investors (PREI ® ), and the other which owns one data center property with an affiliate of Griffin Capital Essential Asset REIT, Inc. (GCEAR). The following tables present summarized financial information for the joint ventures as of September 30, 2015 and December 31, 2014 and for the nine months ended September 30, 2015 and 2014 (unaudited, in thousands): As of September 30, 2015 Nine Months Ended September 30, 2015 2015 Net Investment in Properties Total Assets Debt Total Liabilities Equity Revenues Property Operating Expense Net Operating Income Net Income Total Unconsolidated Joint Ventures $ 763,828 $ 939,481 $ 460,418 $ 558,704 $ 380,777 $ 96,407 $ (26,431 ) $ 69,976 $ 28,303 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 103,703 $ 12,170 As of December 31, 2014 Nine Months Ended September 30, 2014 2014 Net Investment in Properties Total Assets Debt Total Liabilities Equity Revenues Property Operating Expense Net Operating Income Net Income Total Unconsolidated Joint Ventures $ 779,752 $ 942,107 $ 461,548 $ 569,895 $ 372,212 $ 71,882 $ (17,409 ) $ 54,473 $ 23,350 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 94,729 $ 9,513 Prudential Real Estate Investors (PREI ® ) Joint Venture On March 5, 2014, we contributed the property at 636 Pierce Street in Somerset, New Jersey, which we acquired in December 2013, to our unconsolidated joint venture with the PREI ® fund that was formed in September 2013. The property was valued at approximately $40.4 million and subject to $26.1 million in debt, which the joint venture assumed. The PREI ® fund contributed approximately $11.4 million in cash for their 80% share of the net asset value of $14.3 million . Subsequent to the closing, the joint venture refinanced the existing debt with $23.0 million drawn from the joint venture’s bank facility. Including the refinance costs, the PREI ® fund contributed $17.5 million for the 636 Pierce Street property, bringing their contributed capital in the joint venture to $164.8 million . The transaction produced a $1.9 million gain for the Company representing the difference between the $11.4 million of cash proceeds received by the Company for its 80% share of the net asset less the Company’s book value. Griffin Capital Essential Asset REIT, Inc. (GCEAR) Joint Venture On September 9, 2014, we formed a joint venture with an affiliate of GCEAR. We contributed to the joint venture the property located at 43915 Devin Shafron Drive (Building A) in Ashburn, Virginia, which is a Turn-Key Flex® data center property valued at approximately $185.5 million (excluding approximately $2.1 million of closing costs). GCEAR contributed cash to the joint venture and holds an 80% interest in the joint venture. We retained a 20% interest in the joint venture. The joint venture agreement provides for a current annual preferred return from cash flow first to GCEAR and then to us, after which a portion of any excess cash flows is shared by the partners based on their respective interests and the remaining portion is paid to us as a promote interest. We perform the day-to-day accounting and property management functions for the joint venture and the property and, as such, earn management fees. Although we are the managing member of the joint venture and manage the day-to-day activities, certain major decisions, including approval of annual budgets, require approval of the GCEAR member. Thus, we concluded we do not own a controlling interest and account for our interest in the joint venture as an equity method investment. The joint venture arranged a $102.0 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	9 Months Ended
	Sep. 30, 2015
Acquired Intangible Assets And Liabilities [Abstract]
Acquired Intangible Assets And Liabilities	Acquired Intangible Assets and Liabilities The following summarizes our acquired intangible assets (acquired in-place lease value and acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of September 30, 2015 and December 31, 2014 . Balance as of (Amounts in thousands) September 30, 2015 December 31, 2014 Acquired in-place lease value: Gross amount $ 652,629 $ 680,419 Accumulated amortization (460,469 ) (452,739 ) Net $ 192,160 $ 227,680 Acquired above-market leases: Gross amount $ 118,881 $ 126,677 Accumulated amortization (88,264 ) (88,072 ) Net $ 30,617 $ 38,605 Acquired below-market leases: Gross amount $ 278,514 $ 282,670 Accumulated amortization (189,882 ) (178,435 ) Net $ 88,632 $ 104,235 Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase to rental revenues of $2.2 million and $2.4 million for the three months ended September 30, 2015 and 2014 , respectively, and $6.9 million and $7.7 million for the nine months ended September 30, 2015 and 2014 , respectively. The expected average remaining lives for acquired below-market leases and acquired above-market leases is 5.6 years and 3.4 years, respectively, as of September 30, 2015 . Estimated annual amortization of acquired below-market leases, net of acquired above-market leases, for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows: (Amounts in thousands) Remainder of 2015 $ 1,994 2016 7,554 2017 6,143 2018 4,534 2019 4,610 Thereafter 33,180 Total $ 58,015 Amortization of acquired in-place lease value (a component of depreciation and amortization expense) was $10.1 million and $16.5 million for the three months ended September 30, 2015 and 2014 , respectively, and $32.2 million and $50.0 million for the nine months ended September 30, 2015 and 2014 , respectively. The expected average amortization period for acquired in-place lease value is 6.0 years as of September 30, 2015 . The weighted average remaining contractual life for acquired leases excluding renewals or extensions is 4.6 years as of September 30, 2015 . Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows: (Amounts in thousands) Remainder of 2015 $ 8,371 2016 31,893 2017 27,367 2018 25,100 2019 22,600 Thereafter 76,829 Total $ 192,160

Debt of the Company

Debt of the Company	9 Months Ended
	Sep. 30, 2015
Debt Disclosure [Abstract]
Debt of the Company	Debt of the Company In this Note 6, the “Company” refers only to Digital Realty Trust, Inc. and not to any of its subsidiaries. The Company itself does not currently have any indebtedness. All debt is currently held directly or indirectly by the Operating Partnership. Guarantee of Debt The Company guarantees the Operating Partnership’s obligations with respect to its 5.875% notes due 2020 ( 2020 Notes ), 5.250% notes due 2021 ( 2021 Notes ), 3.950% notes due 2022 ( 3.950% 2022 Notes ), 3.625% notes due 2022 ( 3.625% 2022 Notes ) and its unsecured senior notes sold to Prudential Investment Management, Inc. and certain of its affiliates pursuant to the Amended and Restated Note Purchase and Private Shelf Agreement, as amended, which we refer to as the Prudential Shelf Facility. The Company and the Operating Partnership guarantee the obligations of Digital Stout Holding, LLC, a wholly owned subsidiary of the Operating Partnership, with respect to its 4.750% notes due 2023 ( 2023 Notes ) and 4.250% notes due 2025 ( 2025 Notes ). Prior to the completion of the Operating Partnership Merger (as defined in Note 7 "Debt of the Operating Partnership"), the Company and the Operating Partnership guaranteed the obligations of Digital Delta Holdings, LLC, a wholly owned subsidiary of Digital Realty Trust, Inc., with respect to its 3.400% Notes due 2020 (3.400% 2020 Notes) and 4.750% Notes due 2025 (4.750% 2025 Notes). Following the completion of the Operating Partnership Merger, the 3.400% 2020 Notes and 4.750% 2025 Notes became the senior unsecured obligations of the Operating Partnership and remain guaranteed by the Company. The Company is also the guarantor of the Operating Partnership’s and its subsidiary borrowers’ obligations under the global revolving credit facility and unsecured term loan.

Debt of the Operating Partnersh

Debt of the Operating Partnership	9 Months Ended
	Sep. 30, 2015
Digital Realty Trust, L.P.
Debt Of The Operating Partnership	Debt of the Operating Partnership A summary of outstanding indebtedness of the Operating Partnership as of September 30, 2015 and December 31, 2014 is as follows (in thousands): Indebtedness Interest Rate at September 30, 2015 Maturity Date Principal Outstanding September 30, 2015 Principal Outstanding December 31, 2014 Global revolving credit facility Various (1) Nov 3, 2017 $ 688,957 (2) $ 525,951 (2) Unsecured term loan Various (3)(6) Apr 16, 2017 938,276 (4) 976,600 (4) Unsecured senior notes: Prudential Shelf Facility: Series C 9.680% Jan 6, 2016 25,000 25,000 Series D 4.570% Jan 20, 2015 — (7) 50,000 Series E 5.730% Jan 20, 2017 50,000 50,000 Series F 4.500% Feb 3, 2015 — (7) 17,000 Total Prudential Shelf Facility 75,000 142,000 Senior Notes: 4.50% notes due 2015 4.500% Jul 15, 2015 (8) — 375,000 5.875% notes due 2020 5.875% Feb 1, 2020 500,000 500,000 5.25% notes due 2021 5.250% Mar 15, 2021 400,000 400,000 3.95% notes due 2022 3.950% Jul 1, 2022 (9) 500,000 — 3.625% notes due 2022 3.625% Oct 1, 2022 300,000 300,000 4.75% notes due 2023 4.750% Oct 13, 2023 453,840 (10) 467,310 (10) 4.25% notes due 2025 4.250% Jan 17, 2025 605,120 (10) 623,080 (10) Unamortized discounts (17,601 ) (15,632 ) Total senior notes, net of discount 2,741,359 2,649,758 Total unsecured senior notes, net of discount 2,816,359 2,791,758 Indebtedness Interest Rate at September 30, 2015 Maturity Date Principal Outstanding September 30, 2015 Principal Outstanding December 31, 2014 Mortgage loans: 200 Paul Avenue 1-4 (5) 5.74% Oct 8, 2015 — (11) 68,665 2045 & 2055 Lafayette Street (5) 5.93% Feb 6, 2017 61,728 62,563 34551 Ardenwood Boulevard 1-4 (5) 5.95% Nov 11, 2016 50,700 51,339 1100 Space Park Drive (5) 5.89% Dec 11, 2016 50,648 51,295 600 West Seventh Street 5.80% Mar 15, 2016 46,466 47,825 150 South First Street (5) 6.30% Feb 6, 2017 48,699 49,316 2334 Lundy Place (5) 5.96% Nov 11, 2016 36,875 37,340 8025 North Interstate 35 4.09% Mar 6, 2016 5,857 6,057 731 East Trade Street 8.22% Jul 1, 2020 3,539 3,836 Unamortized net premiums 475 582 Total mortgage loans, including premiums 304,987 378,818 Total indebtedness $ 4,748,579 $ 4,673,127 _________________________________ (1) The interest rate for borrowings under the global revolving credit facility equals the applicable index plus a margin of 110 basis points, which is based on the current credit ratings of our long-term debt. An annual facility fee of 20 basis points, which is based on the credit ratings of our long-term debt, is due and payable quarterly on the total commitment amount of the facility. Two six -month extensions are available, which we may exercise if certain conditions are met. (2) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of September 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate Floating Rate Borrowing (a) U.S. dollar ($) $ 50,000 1.29 % $ 90,000 1.27 % British pound sterling (£) 110,434 (c) 1.62 % 132,716 (d) 1.61 % Euro (€) 214,822 (c) 1.00 % 58,071 (d) 1.13 % Australian dollar (AUD) 88,497 (c) 3.15 % 72,676 (d) 3.74 % Hong Kong dollar (HKD) 88,476 (c) 1.36 % 79,336 (d) 1.34 % Japanese yen (JPY) 14,265 (c) 1.13 % 13,201 (d) 1.17 % Singapore dollar (SGD) 46,475 (c) 2.42 % 6,565 (d) 1.64 % Canadian dollar (CAD) 70,988 (c) 1.86 % 62,386 (d) 2.39 % Total $ 683,957 1.63 % $ 514,951 1.84 % Base Rate Borrowing (b) U.S. dollar ($) $ 5,000 3.35 % $ 11,000 3.35 % Total borrowings $ 688,957 1.65 % $ 525,951 1.87 % (a) The interest rates for floating rate borrowings under the global revolving credit facility equal the applicable index plus a margin of 110 basis points, which is based on the credit ratings of our long-term debt. (b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt. (c) Based on exchange rates of $1.51 to £1.00 , $1.12 to €1.00 , $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.70 to 1.00 SGD and $0.75 to 1.00 CAD, respectively, as of September 30, 2015 . (d) Based on exchange rates of $1.56 to £1.00 , $1.21 to €1.00 , $0.82 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.75 to 1.00 SGD and $0.86 to 1.00 CAD, respectively, as of December 31, 2014 . (3) Interest rates are based on our current senior unsecured debt ratings and are 120 basis points over the applicable index for floating rate advances. Two six -month extensions are available, which we may exercise if certain conditions are met. (4) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of September 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate U.S. dollar ($) $ 410,905 1.40 % (b) $ 410,905 1.36 % (d) Singapore dollar (SGD) 160,659 (a) 2.08 % (b) 172,426 (c) 1.45 % (d) British pound sterling (£) 182,935 (a) 1.78 % 188,365 (c) 1.76 % Euro (€) 111,211 (a) 1.20 % 120,375 (c) 1.22 % Australian dollar (AUD) 72,566 (a) 3.34 % 84,529 (c) 3.98 % Total $ 938,276 1.72 % (b) $ 976,600 1.66 % (d) (a) Based on exchange rates of $0.70 to 1.00 SGD, $1.51 to £1.00 , $1.12 to €1.00 and $0.70 to 1.00 AUD, respectively, as of September 30, 2015 . (b) As of September 30, 2015 , the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.16% (Singapore dollar) and 1.94% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps. (c) Based on exchange rates of $0.75 to 1.00 SGD, $1.56 to £1.00 , $1.21 to €1.00 and $0.82 to 1.00 AUD, respectively, as of December 31, 2014 . (d) As of December 31, 2014 , the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.01% (Singapore dollar) and 2.00% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps. (5) The respective borrower’s assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person. (6) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by the U.S. dollar and Singapore dollar tranches of the unsecured term loan. See Note 14 "Derivative Instruments" for further information. (7) These unsecured senior notes were repaid in full at maturity. (8) On May 26, 2015, the Operating Partnership redeemed the entire outstanding principal amount of its 4.500% Notes due 2015 (2015 Notes), at a redemption price of 100% of the principal amount of the 2015 Notes plus accrued and unpaid interest thereon up to, but excluding, the redemption date. (9) On June 23, 2015, the Operating Partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum. The purchase price paid by the initial purchasers was 99.236% of the principal amount. (10) Based on exchange rate of $1.51 to £1.00 as of September 30, 2015 and $1.56 to £1.00 as of December 31, 2014 . (11) This loan was repaid in full in September 2015. Global Revolving Credit Facility On August 15, 2013, the Operating Partnership refinanced its global revolving credit facility, increasing its total borrowing capacity to $2.0 billion from $1.8 billion . The global revolving credit facility has an accordion feature that would enable us to increase the borrowing capacity of the credit facility to $2.55 billion , subject to the receipt of lender commitments and other conditions precedent. The refinanced facility matures on November 3, 2017 , with 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 September 30, 2015 , interest rates are based on 1-month LIBOR, 1-month GBP LIBOR, 1-month EURIBOR, 1-month BBR, 1-month HIBOR, 1-month JPY LIBOR, 1-month SOR and 1-month CDOR plus a margin of 1.10% . The facility also bore a base borrowing rate of 3.35% (USD) which is based on U.S. Prime Rate plus a margin of 0.10% . We have used and intend to use available borrowings under the global revolving credit facility to acquire additional properties, to fund development opportunities and for general working capital and other corporate purposes, including potentially for the repurchase, redemption or retirement of outstanding debt or equity securities. As of September 30, 2015 , we have capitalized approximately $18.0 million of financing costs related to the global revolving credit facility. As of September 30, 2015 , approximately $689.0 million was drawn under the global revolving credit facility and $5.5 million of letters of credit were issued. The global revolving credit facility contains various restrictive covenants, including limitations on our ability to incur additional indebtedness, make certain investments or merge with another company, and requirements to maintain financial coverage ratios, including with respect to unencumbered assets. In addition, the global revolving credit facility restricts Digital Realty Trust, Inc. from making distributions to its stockholders, or redeeming or otherwise repurchasing shares of its capital stock, after the occurrence and during the continuance of an event of default, except in limited circumstances including as necessary to enable Digital Realty Trust, Inc. to maintain its qualification as a REIT and to minimize the payment of income or excise tax. As of September 30, 2015 , we were in compliance with all of such covenants. Unsecured Term Loan On August 15, 2013, we refinanced the senior unsecured multi-currency term loan facility, increasing its total borrowing capacity to $1.0 billion from $750.0 million . Pursuant to the accordion feature, total commitments can be increased to $1.1 billion , subject to the receipt of lender commitments and other conditions precedent. The facility matures on April 16, 2017 , with 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 September 30, 2015 , the balance outstanding is approximately $938.3 million . We have used borrowings under the term loan for acquisitions, repayment of indebtedness, development, working capital and general corporate purposes. The covenants under this loan are consistent with our global revolving credit facility and, as of September 30, 2015 , we were in compliance with all of such covenants. As of September 30, 2015 , we have capitalized approximately $8.4 million of financing costs related to the unsecured term loan. 3.950% Notes due 2022 On June 23, 2015, the Operating Partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum (the 3.950% 2022 Notes). The public offering price was 99.236% of the principal amount. The 3.950% 2022 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 3.950% 2022 Notes is payable on January 1 and July 1 of each year, beginning on January 1, 2016. The net proceeds from the offering after deducting the original issue discount of approximately $3.8 million and underwriting commissions and expenses of approximately $4.4 million was approximately $491.8 million . The Operating Partnership will use the net proceeds from the offering of the 3.950% 2022 Notes to fund certain eligible green projects, including the development and redevelopment of such projects. Pending such uses, the Operating Partnership temporarily repaid borrowings under its global revolving credit facility. The 3.950% 2022 Notes have been reflected net of discount in the condensed consolidated balance sheet. The indenture governing the 3.950% 2022 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60% , (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50 , and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At September 30, 2015 , we were in compliance with each of these financial covenants. 3.400% Notes due 2020 and 4.750% Notes due 2025 On October 1, 2015, Digital Delta Holdings, LLC, a Delaware limited liability company and wholly owned subsidiary of Digital Realty Trust, Inc., issued $500.0 million aggregate principal amount of its 3.400% Notes due 2020 (the “3.400% 2020 Notes”) and $450.0 million aggregate principal amount of its 4.750% Notes due 2025 (the “4.750% 2025 Notes” and together with the 3.400% 2020 Notes, the “Delta Holdings Notes”), fully and unconditionally guaranteed by Digital Realty Trust, Inc. and Digital Realty Trust, L.P. The terms of the Delta Holdings Notes are governed by an indenture, dated as of October 1, 2015, by and among Digital Delta Holdings, LLC, as issuer, Digital Realty Trust, Inc. and Digital Realty Trust, L.P., as guarantors, and Wells Fargo Bank, National Association, as trustee. The indenture contains various restrictive covenants, including limitations on the ability of Digital Realty Trust, L.P. and its subsidiaries to incur additional indebtedness and requirements to maintain a pool of unencumbered assets. Digital Delta Holdings, LLC used the net proceeds from the offering to fund a portion of the aggregate purchase price for the acquisition of Telx Holdings, Inc. (the “Telx Acquisition”). The purchase price paid by the initial purchasers for the 3.400% 2020 Notes and 4.750% 2025 Notes was 99.777% and 100.000% of the principal amount thereof, respectively. The 3.400% 2020 Notes and 4.750% 2025 Notes bear interest at 3.400% and 4.750% per annum, respectively. Interest is payable on April 1 and October 1 of each year, beginning April 1, 2016, until the respective maturity dates of October 1, 2020 and October 1, 2025. Pursuant to the terms of the indenture, within five business days following the consummation of the Telx Acquisition, Digital Delta Holdings, LLC was required to merge with and into Digital Realty Trust, L.P., with Digital Realty Trust, L.P. surviving the merger (the “Operating Partnership Merger”) and to assume Digital Delta Holdings, LLC’s obligations under the Delta Holdings Notes and the related indenture and registration rights agreement by operation of law. The Operating Partnership Merger was consummated on October 13, 2015. Subsequent to the Operating Partnership Merger, the Notes are the Operating Partnership’s senior unsecured obligations and rank equally in right of payment with all of the Operating Partnership’s other unsecured and unsubordinated indebtedness from time to time outstanding. However, the Delta Holdings Notes are effectively subordinated in right of payment to all of the operating partnership’s existing and future secured indebtedness (to the extent of the collateral securing the same) and to all existing and future liabilities and preferred equity of the Operating Partnership’s subsidiaries. Prior to the completion of the Operating Partnership Merger, Digital Realty Trust, Inc. and the Operating Partnership guaranteed the obligations of the Delta Holdings Notes. Following the completion of the Operating Partnership Merger, the Delta Holdings Notes became the senior unsecured obligations of the Operating Partnership and remained guaranteed by Digital Realty Trust, Inc. The Delta Holdings Notes will be redeemable in whole at any time or in part from time to time, at the Operating Partnership’s option, at a redemption price equal to the sum of: • an amount equal to 100% of the principal amount of the Delta Holdings Notes to be redeemed plus accrued and unpaid interest up to, but not including, the redemption date; and • a make-whole premium calculated in accordance with the indenture. Notwithstanding the foregoing, if any of the 3.400% 2020 Notes are redeemed on or after September 1, 2020 or if any of the 4.750% 2025 Notes are redeemed on or after July 1, 2025, the redemption price will not include a make-whole premium. Due to Parent Company On August 24, 2015, Digital Realty Trust, Inc. completed an underwritten public offering of 10,000,000 shares of 6.350% Series I Cumulative Redeemable Preferred Stock (the "Series I Preferred Stock"), for net proceeds of approximately $242.7 million after deducting the underwriting discount. Digital Realty Trust, Inc. used the net proceeds from the offering to fund a portion of the aggregate purchase price for the Telx Acquisition. Pending the closing of the Telx Acquisition, Digital Realty Trust, Inc. loaned the net proceeds from the Series I Preferred Stock offering of approximately $242.7 million to the Operating Partnership. The intercompany note was scheduled to mature on January 11, 2016 with an interest rate of 4.50% per annum. As of September 30, 2015, the full amount of the intercompany note was outstanding and approximately $1.2 million of accrued interest was recorded during the three months ended September 30, 2015. On October 8, 2015, the Operating Partnership repaid the intercompany note in full, with accrued interest, in the amount of $244.1 million . On October 13, 2015, in connection with the consummation of the Operating Partnership Merger, the Operating Partnership issued to Digital Realty Trust, Inc. 10,000,000 series I cumulative redeemable preferred units with substantially identical terms as the Series I Preferred Stock. The table below summarizes our debt maturities and principal payments as of September 30, 2015 (in thousands): Global Revolving Credit Facility (1) Unsecured (1) Prudential Shelf Facility Senior Notes Mortgage Loans Total Debt Remainder of 2015 $ — $ — $ — $ — $ 1,768 $ 1,768 2016 — — 25,000 — 191,979 216,979 2017 688,957 938,276 50,000 — 108,395 1,785,628 2018 — — — — 593 593 2019 — — — — 644 644 Thereafter — — — 2,758,960 1,133 2,760,093 Subtotal $ 688,957 $ 938,276 $ 75,000 $ 2,758,960 $ 304,512 $ 4,765,705 Unamortized discount — — — (17,601 ) — (17,601 ) Unamortized premium — — — — 475 475 Total $ 688,957 $ 938,276 $ 75,000 $ 2,741,359 $ 304,987 $ 4,748,579 (1) Subject to 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	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Income per Share	Income per Share The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Net income available to common stockholders $ 38,522 $ 109,314 $ 257,305 $ 185,010 Weighted average shares outstanding—basic 135,832,503 135,492,618 135,782,831 132,635,894 Potentially dilutive common shares: Stock options 19,983 52,629 20,629 46,649 Unvested incentive units 86,190 129,024 65,752 61,122 Series I Cumulative Redeemable Preferred Stock 1,703,182 — 567,727 — Market performance-based awards 618,078 272,262 483,538 109,301 Weighted average shares outstanding—diluted 138,259,936 135,946,533 136,920,477 132,852,966 Income per share: Basic $ 0.28 $ 0.81 $ 1.89 $ 1.39 Diluted $ 0.28 $ 0.80 $ 1.88 $ 1.39 We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 2,635,444 2,815,512 2,698,215 2,745,730 Potentially dilutive 2029 Debentures — — — 2,617,790 Potentially dilutive Series E Cumulative Redeemable Preferred Stock 4,567,661 4,673,322 4,440,429 5,136,112 Potentially dilutive Series F Cumulative Redeemable Preferred Stock 2,896,800 2,963,810 2,816,110 3,257,310 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 3,960,900 4,052,525 3,850,569 4,453,839 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 5,804,286 5,938,553 5,642,608 4,111,306 Shares subject to Forward Equity Offering 10,500,000 — 10,500,000 — 30,365,091 20,443,722 29,947,931 22,322,087

Income per Unit

Income per Unit	9 Months Ended
	Sep. 30, 2015
Digital Realty Trust, L.P.
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Income per Unit	Income per Unit The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Net income available to common unitholders $ 38,116 $ 111,586 $ 261,302 $ 188,848 Weighted average units outstanding—basic 138,467,947 138,308,130 138,481,046 135,381,624 Potentially dilutive common units: Stock options 19,983 52,629 20,629 46,649 Unvested incentive units 86,190 129,024 65,752 61,122 Market performance-based awards 618,078 272,262 483,538 109,301 Weighted average units outstanding—diluted 139,192,198 138,762,045 139,050,965 135,598,696 Income per unit: Basic $ 0.28 $ 0.81 $ 1.89 $ 1.39 Diluted $ 0.27 $ 0.80 $ 1.88 $ 1.39 We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Potentially dilutive 2029 Debentures — 1,121,910 — 3,948,379 Potentially dilutive Series E Cumulative Redeemable Preferred Units 4,567,661 5,060,744 4,440,429 5,367,507 Potentially dilutive Series F Cumulative Redeemable Preferred Units 2,896,800 3,209,512 2,816,110 3,404,060 Potentially dilutive Series G Cumulative Redeemable Preferred Units 3,960,900 4,388,483 3,850,569 4,654,496 Potentially dilutive Series H Cumulative Redeemable Preferred Units 5,804,286 6,437,332 5,642,608 3,449,841 Units subject to Forward Equity Offering 10,500,000 — 10,500,000 — 27,729,647 20,217,981 27,249,716 20,824,283

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Digital Realty Trust, Inc. has elected to be treated and believes that it has been organized and has operated in a manner that has enabled it to qualify as a REIT for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. is generally not subject to corporate level federal income taxes on earnings distributed currently to its stockholders. Since inception, Digital Realty Trust, Inc. has distributed at least 100% of its taxable income annually and intends to do so for the tax year ending December 31, 2015 . As such, no provision for federal income taxes has been included in the accompanying condensed consolidated financial statements for the three and nine months ended September 30, 2015 and 2014 . The Operating Partnership is a partnership and is not required to pay federal income tax. Instead, taxable income is allocated to its partners, who include such amounts on their federal income tax returns. As such, no provision for federal income taxes has been included in the Operating Partnership’s accompanying condensed consolidated financial statements. We have elected taxable REIT subsidiary (“TRS”) status for some of our consolidated subsidiaries. In general, a TRS may provide services that would otherwise be considered impermissible for REITs to provide and may hold assets that REITs cannot hold directly. Income taxes for TRS entities were accrued, as necessary, for the three and nine months ended September 30, 2015 and 2014 . For our TRS entities and foreign subsidiaries that are subject to U.S. federal, state and foreign income taxes, deferred tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted tax rates expected to be in effect when the temporary differences reverse. A valuation allowance for deferred tax assets is provided if we believe it is more likely than not that the deferred tax asset may not be realized, based on available evidence at the time the determination is made. An increase or decrease in the valuation allowance that results from the change in circumstances that causes a change in our judgment about the realizability of the related deferred tax asset is included in the income statement. Deferred tax assets (net of valuation allowance) and liabilities for our TRS entities and foreign subsidiaries were accrued, as necessary, for the three and nine months ended September 30, 2015 and 2014 . As of September 30, 2015 , we had deferred tax liabilities, net of deferred tax assets, of approximately $135.4 million primarily related to our foreign properties. The majority of our net deferred tax liability relates to differences between tax basis and book basis of the assets acquired in the Sentrum Portfolio acquisition during 2012.

Equity And Accumulated Other Co

Equity And Accumulated Other Comprehensive Income, Net	9 Months Ended
	Sep. 30, 2015
Equity And Accumulated Other Comprehensive Income, Net [Abstract]
Equity And Accumulated Other Comprehensive Income, Net	Equity and Accumulated Other Comprehensive Income, Net (a) Equity Distribution Agreements Digital Realty Trust, Inc. entered into equity distribution agreements in June 2011, which we refer to as the 2011 Equity Distribution Agreements, with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC, or the Agents, under which it can issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Agents as its sales agents. The sales of common stock made under the 2011 Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act. Cumulatively through September 30, 2015 , Digital Realty Trust, Inc. has generated net proceeds of approximately $342.7 million from the issuance of approximately 5.7 million common shares under the 2011 Equity Distribution Agreements at an average price of $60.35 per share after payment of approximately $3.5 million of commissions to the sales agents and before offering expenses. No sales were made under the program during the nine months ended September 30, 2015 and 2014 . As of September 30, 2015 , shares of common stock having an aggregate offering price of $53.8 million remained available for offer and sale under the program. (b) Forward Equity Sale On July 20, 2015, Digital Realty Trust, Inc. completed an underwritten public offering of 10,500,000 shares of its common stock, all of which were offered in connection with forward sale agreements it entered into with certain financial institutions acting as forward purchasers. The forward purchasers borrowed and sold 10,500,000 shares of Digital Realty Trust, Inc.’s common stock in the public offering. Digital Realty Trust, Inc. did not receive any proceeds from the sale of our common stock by the forward purchasers in the public offering. On October 8, 2015, Digital Realty Trust, Inc. physically settled in full the forward sale agreements by issuing an aggregate of 10,500,000 shares of its common stock to the forward counterparties in exchange for net proceeds of approximately $674.1 million . Digital Realty Trust, Inc. used the net proceeds from the physical settlement of the forward sale agreements to fund a portion of the Telx Acquisition. (c) Redeemable Preferred Stock 6.350% Series I Cumulative Redeemable Preferred Stock On August 24, 2015, Digital Realty Trust, Inc. issued 10,000,000 shares of its 6.350% series I cumulative redeemable preferred stock (the "Series I Preferred Stock") for net proceeds of approximately $241.7 million . We used the net proceeds from the offering to fund a portion of the aggregate purchase price for the Telx Acquisition. Prior to the closing of the Telx Acquisition, we loaned the net proceeds from the offering to the Operating Partnership. Dividends are cumulative on the Series I Preferred Stock from the date of original issuance in the amount of $1.5875 per share each year, which is equivalent to 6.350% of the $25.00 liquidation preference per share. Dividends on the Series I Preferred Stock are payable quarterly in arrears. The first dividend payable on the Series I Preferred Stock on December 31, 2015 will be a pro rata dividend from and including the original issue date to and including December 31, 2015 in the amount of $0.56003 per share. The Series I Preferred Stock does not have a stated maturity date and is not subject to any sinking fund or mandatory redemption provisions. Upon liquidation, dissolution or winding up, the Series I Preferred Stock will rank senior to Digital Realty Trust, Inc. common stock and rank on parity with Digital Realty Trust, Inc.’s series E cumulative redeemable preferred stock, series F cumulative redeemable preferred stock, series G cumulative redeemable preferred stock and series H cumulative redeemable preferred stock with respect to the payment of distributions and other amounts. Digital Realty Trust, Inc. is not allowed to redeem the Series I Preferred Stock before August 24, 2020, except in limited circumstances to preserve its status as a REIT. On or after August 24, 2020, Digital Realty Trust, Inc. may, at its option, redeem the Series I Preferred Stock, in whole or in part, at any time or from time to time, for cash at a redemption price of $25.00 per share, plus all accrued and unpaid dividends on such Series I Preferred Stock up to but excluding the redemption date. Holders of the Series I Preferred Stock generally have no voting rights except for limited voting rights if Digital Realty Trust, Inc. fails to pay dividends for six or more quarterly periods (whether or not consecutive) and in certain other circumstances. Upon the occurrence of specified changes of control, as a result of which neither Digital Realty Trust, Inc.’s common stock nor the common securities of the acquiring or surviving entity (or American Depositary Receipts representing such securities) is listed on the New York Stock Exchange, the NYSE MKT, LLC or the NASDAQ Stock Market or listed or quoted on a successor exchange or quotation system, each holder of Series I Preferred Stock will have the right (unless, prior to the change of control conversion date specified in the Articles Supplementary governing the Series I Preferred Stock, Digital Realty Trust, Inc. has provided or provides notice of its election to redeem the Series I Preferred Stock) to convert some or all of the Series I Preferred Stock held by it into a number of shares of Digital Realty Trust, Inc.’s common stock per share of Series I Preferred Stock to be converted equal to the lesser of: the quotient obtained by dividing (i) the sum of the $25.00 liquidation preference plus the amount of any accrued and unpaid dividends to, but not including, the change of control conversion date (unless the change of control conversion date is after a record date for a Series I Preferred Stock dividend payment and prior to the corresponding Series I Preferred Stock dividend payment date, in which case no additional amount for such accrued and unpaid dividend will be included in this sum) by (ii) the common stock price specified in the Articles Supplementary governing the Series I Preferred Stock; and 0.76231, or the share cap, subject to certain adjustments; subject, in each case, to provisions for the receipt of alternative consideration as described in the Articles Supplementary governing the Series I Preferred Stock. Except in connection with specified change of control transactions, the Series I Preferred Stock is not convertible into or exchangeable for any other property or securities of Digital Realty Trust, Inc. (d) Noncontrolling Interests in Operating Partnership Noncontrolling interests in the Operating Partnership relate to the interests that are not owned by Digital Realty Trust, Inc. The following table shows the ownership interests in the Operating Partnership as of September 30, 2015 and December 31, 2014 : September 30, 2015 December 31, 2014 Number of units Percentage of total Number of units Percentage of total Digital Realty Trust, Inc. 135,843,684 98.0 % 135,626,255 97.8 % Noncontrolling interests consist of: Common units held by third parties 1,421,314 1.0 1,463,814 1.1 Incentive units held by employees and directors (see Note 13) 1,414,299 1.0 1,549,847 1.1 138,679,297 100.0 % 138,639,916 100.0 % Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of Digital Realty Trust, Inc. common stock at the time of redemption. Alternatively, Digital Realty Trust, Inc. may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, Digital Realty Trust, Inc. evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the noncontrolling Operating Partnership common and incentive units. Based on the results of this analysis, we concluded that the common and incentive Operating Partnership units met the criteria to be classified within equity. The redemption value of the noncontrolling Operating Partnership common units and the vested incentive units was approximately $170.5 million and $179.0 million based on the closing market price of Digital Realty Trust, Inc. common stock on September 30, 2015 and December 31, 2014 , respectively. The following table shows activity for the noncontrolling interests in the Operating Partnership for the nine months ended September 30, 2015 : Common Units Incentive Units Total As of December 31, 2014 1,463,814 1,549,847 3,013,661 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (42,500 ) — (42,500 ) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) — (76,087 ) (76,087 ) Cancellation of incentive units held by employees and directors — (150,140 ) (150,140 ) Grant of incentive units to employees and directors — 90,679 90,679 As of September 30, 2015 1,421,314 1,414,299 2,835,613 (1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc. (e) Dividends We have declared and paid the following dividends on our common and preferred stock for the nine months ended September 30, 2015 (in thousands, except per share data): Date dividend declared Dividend payment date Series E Preferred Stock Series F Preferred Stock Series G Preferred Stock Series H Preferred Stock Common Stock February 25, 2015 March 31, 2015 $ 5,031 $ 3,023 $ 3,672 $ 6,730 $ 115,419 May 12, 2015 June 30, 2015 5,031 3,023 3,672 6,730 115,458 August 11, 2015 September 30, 2015 5,031 3,023 3,672 6,730 115,454 $ 15,093 $ 9,069 $ 11,016 $ 20,190 $ 346,331 Annual rate of dividend per share $ 1.750 $ 1.656 $ 1.469 $ 1.844 $ 3.400 Distributions out of Digital Realty Trust, Inc.’s current or accumulated earnings and profits are generally classified as dividends whereas distributions in excess of its current and accumulated earnings and profits, to the extent of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock, are generally classified as a return of capital. Distributions in excess of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock are generally characterized as capital gain. Cash provided by operating activities has generally been sufficient to fund all distributions; however, in the future we may also need to utilize borrowings under the global revolving credit facility to fund all or a portion of distributions. (f) Accumulated Other Comprehensive Income, Net The accumulated balances for each item within other comprehensive income, net are as follows (in thousands): Foreign currency Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (39,567 ) $ (5,479 ) $ (45,046 ) Net current period change (40,688 ) (1) (4,290 ) (44,978 ) Reclassification to interest expense from interest rate swaps — 2,036 2,036 Balance as of September 30, 2015 $ (80,255 ) $ (7,733 ) $ (87,988 ) (1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

Capital And Accumulated Other C

Capital And Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2015
Partners' Capital Notes [Abstract]
Capital And Accumulated Other Comprehensive Income	Capital and Accumulated Other Comprehensive Income (a) Allocations of Net Income and Net Losses to Partners Except for special allocations to holders of profits interest units described below in Note 13 “Incentive Plan—Long-Term Incentive Units,” the Operating Partnership’s net income will generally be allocated to the General Partner to the extent of the accrued preferred return on its preferred units, and then to the General Partner and the Operating Partnership’s limited partners in accordance with the respective percentage interests in the common units issued by the Operating Partnership. Net loss will generally be allocated to the General Partner and the Operating Partnership’s limited partners in accordance with the respective common percentage interests in the Operating Partnership until the limited partner’s capital is reduced to zero and any remaining net loss would be allocated to the General Partner. However, in some cases, losses may be disproportionately allocated to partners who have guaranteed our debt. The allocations described above are subject to special allocations relating to depreciation deductions and to compliance with the provisions of Sections 704(b) and 704(c) of the Code, and the associated Treasury Regulations. (b) Partnership Units Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of the General Partner’s common stock at the time of redemption. Alternatively, the General Partner may elect to acquire those common units in exchange for shares of the General Partner’s common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, the Operating Partnership evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the limited partners’ common units and the vested incentive units. Based on the results of this analysis, the Operating Partnership concluded that the common and vested incentive Operating Partnership units met the criteria to be classified within capital. The redemption value of the limited partners’ common units and the vested incentive units was approximately $170.5 million and $179.0 million based on the closing market price of Digital Realty Trust, Inc.’s common stock on September 30, 2015 and December 31, 2014 , respectively. (c) Distributions All distributions on the Operating Partnership’s units are at the discretion of Digital Realty Trust, Inc.’s board of directors. The Operating Partnership has declared and paid the following distributions on its common and preferred units for the nine months ended September 30, 2015 (in thousands, except for per unit data): Date distribution declared Distribution 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 August 11, 2015 September 30, 2015 5,031 3,023 3,672 6,730 117,962 $ 15,093 $ 9,069 $ 11,016 $ 20,190 $ 353,796 Annual rate of distribution per unit $ 1.750 $ 1.656 $ 1.469 $ 1.844 $ 3.400 (d) Accumulated Other Comprehensive Income The accumulated balances for each item within other comprehensive income are as follows (in thousands): Foreign currency Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (42,138 ) $ (6,295 ) $ (48,433 ) Net current period change (41,480 ) (1) (4,374 ) (45,854 ) Reclassification to interest expense from interest rate swaps — 2,077 2,077 Balance as of September 30, 2015 $ (83,618 ) $ (8,592 ) $ (92,210 ) (1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

Incentive Plan

Incentive Plan	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Incentive Plan	Incentive Plan Our Amended and Restated 2004 Incentive Award Plan (as defined below) previously provided for the grant of incentive awards to employees, directors and consultants. Awards issuable under the Amended and Restated 2004 Incentive Award Plan included stock options, restricted stock, dividend equivalents, stock appreciation rights, long-term incentive units, cash performance bonuses and other incentive awards. Only employees were eligible to receive incentive stock options under the Amended and Restated 2004 Incentive Award Plan. Initially, we had reserved a total of 4,474,102 shares of common stock for issuance pursuant to the Digital Realty Trust, Inc., Digital Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (the 2004 Incentive Award Plan), subject to certain adjustments set forth in the 2004 Incentive Award Plan. On May 2, 2007, Digital Realty Trust, Inc.’s stockholders approved the First Amended and Restated Digital Realty Trust, Inc., Digital Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (as amended, the Amended and Restated 2004 Incentive Award Plan). The Amended and Restated 2004 Incentive Award Plan increased the aggregate number of shares of stock which could have been issued or transferred under the plan by 5,000,000 shares to a total of 9,474,102 shares, and provided that the maximum number of shares of stock with respect to awards granted to any one participant during a calendar year was 1,500,000 shares and the maximum amount that could have been paid in cash during any calendar year with respect to any performance-based award not denominated in stock or otherwise for which the foregoing limitation would not be an effective limitation for purposes of Section 162(m) of the Code was $10.0 million . On April 28, 2014, Digital Realty Trust, Inc. held its 2014 Annual Meeting of Stockholders, or the 2014 Annual Meeting, at which the Company’s stockholders approved the Digital Realty Trust, Inc., Digital Services, Inc., and Digital Realty Trust, L.P. 2014 Incentive Award Plan (as amended, the 2014 Incentive Award Plan), which had been previously adopted by the Board of Directors and recommended to the stockholders for approval by the Company’s Board of Directors. The 2014 Incentive Award Plan became effective and replaced the Amended and Restated 2004 Incentive Award Plan as of the date of such stockholder approval. The material features of the 2014 Incentive Award Plan are described in our definitive Proxy Statement filed on March 19, 2014 in connection with the 2014 Annual Meeting, which description is incorporated herein by reference. As of September 30, 2015 , 4,775,319 shares of common stock or awards convertible into or exchangeable for common stock remained available for future issuance under the 2014 Incentive Award Plan. Each long-term incentive unit and Class D Unit issued under the 2014 Incentive Award Plan counts as one share of common stock for purposes of calculating the limit on shares that may be issued under the 2014 Incentive Award Plan and the individual award limits set forth therein. (a) Long-Term Incentive Units Long-term incentive units, which are also referred to as profits interest units, may be issued to eligible participants for the performance of services to or for the benefit of the Operating Partnership. Long-term incentive units (other than Class D Units), whether vested or not, will receive the same quarterly per unit distributions as Operating Partnership common units, which equal per share distributions on Digital Realty Trust, Inc. common stock. Initially, long-term incentive units do not have full parity with common units with respect to liquidating distributions. If such parity is reached, vested long-term incentive units may be converted into an equal number of common units of the Operating Partnership at any time, and thereafter enjoy all the rights of common units of the Operating Partnership, including redemption rights. For a discussion of how long-term incentive units reach parity with common units, see note 13(a) to our consolidated financial statements for the fiscal year ended December 31, 2014 , included in our Annual Report on 10-K for the year ended December 31, 2014 . Below is a summary of our long-term incentive unit activity for the nine months ended September 30, 2015 . Unvested Long-term Incentive Units Units Weighted-Average Grant Date Fair Value Unvested, beginning of period 314,415 $ 59.34 Granted 90,679 64.79 Vested (157,300 ) 60.25 Cancelled or expired (22,496 ) 58.13 Unvested, end of period 225,298 61.03 The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock on the grant date, are being expensed on a straight-line basis for service awards over four years, the current vesting period of the long-term incentive units. Excluding the impact of our former Chief Executive Officer's equity acceleration in 2014 and subsequent cancellation in 2015, the expense recorded for the three months ended September 30, 2015 and 2014 related to long-term incentive units was approximately $1.5 million and $1.5 million , respectively, and approximately $4.6 million and $5.2 million for the nine months ended September 30, 2015 and 2014 , respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.0 million and $0.3 million for the three months ended September 30, 2015 and 2014 , respectively, and approximately $1.1 million and $1.1 million for the nine months ended September 30, 2015 and 2014 , respectively. Unearned compensation representing the unvested portion of the long-term incentive units totaled $8.7 million and $9.3 million as of September 30, 2015 and December 31, 2014 , respectively. We expect to recognize this unearned compensation over the next 2.3 years on a weighted-average basis. (b) Market Performance-Based Awards During the nine months ended September 30, 2015 and 2014 , the Compensation Committee of the Board of Directors of the Company approved the grant of market performance-based Class D Units of the Operating Partnership and market performance-based restricted stock units, or RSUs, covering shares of the Company’s common stock (collectively, the “awards”), under the Amended and Restated 2004 Incentive Award Plan and 2014 Incentive Plan, respectively, to officers and employees of the Company. The awards, which were determined to contain a market condition, utilize total shareholder return, or TSR, over a three-year measurement period as the market performance metric. Awards will vest based on the Company’s TSR relative to the MSCI US REIT Index, or RMS, over a three -year market performance period, or the Market Performance Period, commencing in January 2014 or January 2015, as applicable (or, if earlier, ending on the date on which a change in control of the Company occurs), subject to continued services. Vesting with respect to the market condition is measured based on the difference between the Company’s TSR percentage and the TSR percentage of the RMS, or the RMS Relative Market Performance. In the event that the RMS Relative Market Performance during the Market Performance Period is achieved at the “threshold,” “target” or “high” level as set forth below, the awards will become vested as to the market condition with respect to the percentage of Class D units or RSUs, as applicable, set forth below: Level RMS Relative Market Performance (2014 Awards) RMS Relative Market Performance Vesting Percentage Below Threshold Level < 0 basis points < -300 basis points 0 % Threshold Level 0 basis points -300 basis points 25 % Target Level 325 basis points 100 basis points 50 % High Level > 650 basis points > 500 basis points 100 % If the RMS Relative Market Performance falls between the levels specified above, the percentage of the award that will vest with respect to the market condition will be determined using straight-line linear interpolation between such levels. Following the completion of the Market Performance Period, the 2014 awards that have satisfied the market condition, if any, will vest 50% on February 27, 2017 and 50% on February 27, 2018, subject to continued employment through each applicable vesting date. Following the completion of the Market Performance Period, the 2015 awards that have satisfied the market condition, if any, will vest 50% on February 27, 2018 and 50% on February 27, 2019, subject to continued employment through each applicable vesting date. Service-based vesting will be accelerated, in full or on a pro rata basis, in the event of a change in control, termination of employment by the Company without cause, or termination of employment by the award recipient for good reason, death, disability or retirement, in any case prior to the completion of the Market Performance Period. However, vesting with respect to the market condition will continue to be measured based on RMS Relative Market Performance during the three-year Market Performance Period (or, in the case of a change in control, shortened Market Performance Period). The fair values of the 2014 awards and 2015 awards were measured using a Monte Carlo simulation to estimate the probability of the market vesting condition being satisfied. The Company’s achievement of the market vesting condition is contingent on its TSR over a three -year market performance period, relative to the total shareholder return of the RMS. The Monte Carlo simulation is a probabilistic technique based on the underlying theory of the Black-Scholes formula, which was run for 100,000 trials to determine the fair value of the awards. For each trial, the payoff to an award is calculated at the settlement date and is then discounted to the grant date at a risk-free interest rate. The total expected value of the awards on the grant date was determined by multiplying the average value per award over all trials by the number of awards granted. Assumptions used in the 2014 valuation include expected stock price volatility of 33 percent and a risk-free interest rate of 0.67 percent . Assumptions used in the 2015 valuation include expected stock price volatility of 24 percent and a risk-free interest rate of 1.00 percent . The valuations were performed in a risk-neutral framework, so no assumption was made with respect to an equity risk premium. As of September 30, 2015 , 1,148,991 Class D Units and 368,878 market performance-based RSUs had been awarded to our executive officers and other employees. The number of units granted reflects the maximum number of Class D units or market performance-based RSUs, as applicable, which will become vested assuming the achievement of the highest level of RMS Relative Market Performance under the awards and, in the case of the Class D units, also includes dividend equivalent units. The fair value of these awards of approximately $34.3 million will be recognized as compensation expense on a straight-line basis over the expected service period of approximately four years. The unearned compensation as of September 30, 2015 and December 31, 2014 was $18.9 million and $9.5 million , respectively, net of cancellations. As of September 30, 2015 , none of the above awards had vested. We recognized compensation expense related to these awards of approximately $2.1 million and $0.8 million in the three months ended September 30, 2015 and 2014, respectively, and approximately $5.4 million and $2.2 million in the nine months ended September 30, 2015 and 2014, respectively. We capitalized amounts relating to compensation expense of employees directly engaged in construction and leasing activities of approximately $2.5 million and $0.4 million for the three months ended September 30, 2015 and 2014, respectively, and approximately $3.6 million and $1.0 million for the nine months ended September 30, 2015 and 2014, respectively. If the market conditions are not met, at the end of the applicable performance periods, the unamortized amount will be recognized as an expense at that time. (c) Stock Options The following table summarizes the Amended and Restated 2004 Incentive Award Plan’s stock option activity for the nine -month period ended September 30, 2015 : Period Ended September 30, 2015 Shares Weighted average exercise price Options outstanding, beginning of period 80,933 $ 37.25 Exercised (26,961 ) 29.61 Options outstanding, end of period 53,972 $ 41.07 Exercisable, end of period 53,972 $ 41.07 The following table summarizes information about stock options outstanding and exercisable as of September 30, 2015 : Options outstanding and exercisable Exercise price Number outstanding Weighted-average remaining contractual life (years) Weighted-average exercise price Aggregate intrinsic value $33.18 4,175 1.09 33.18 $ 134,185 $41.73 49,797 1.59 41.73 1,174,711 Total / Weighted-average 53,972 1.55 $ 41.07 $ 1,308,896 (d) Restricted Stock Below is a summary of our restricted stock activity for the nine months ended September 30, 2015 . Unvested Restricted Stock Shares Weighted-Average Grant Date Fair Value Unvested, beginning of period 302,298 $ 57.10 Granted 105,165 66.65 Vested (90,871 ) 59.48 Cancelled or expired (33,284 ) 57.16 Unvested, end of period 283,308 61.25 The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock on the grant date, are being expensed on a straight-line basis for service awards over the vesting period of the restricted stock, which ranges from three to four years. The expense recorded for the three months ended September 30, 2015 and 2014 related to grants of restricted stock was approximately $0.7 million and $0.4 million , respectively, and approximately $1.8 million and $1.9 million for the nine months ended September 30, 2015 and 2014 , respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.6 million and $0.4 million for the three months ended September 30, 2015 and 2014 , respectively, and approximately $2.1 million and $2.0 million for the nine months ended September 30, 2015 and 2014 , respectively. Unearned compensation representing the unvested portion of the restricted stock totaled $11.9 million and $10.4 million as of September 30, 2015 and December 31, 2014, respectively. We expect to recognize this unearned compensation over the next 2.6 years on a weighted-average basis.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments Currently, we use interest rate swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. To comply with the provisions of fair value accounting guidance, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, as of September 30, 2015 , we have assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and have determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. We do not have any fair value measurements on a recurring basis using significant unobservable inputs (Level 3) as of September 30, 2015 or December 31, 2014 . As of September 30, 2015 and December 31, 2014 , we had the following outstanding interest rate derivatives that were designated as effective cash flow hedges of interest rate risk (in thousands): Notional Amount Fair Value at Significant Other Observable Inputs (Level 2) As of September 30, 2015 As of December 31, 2014 Type of Derivative Strike Rate Effective Date Expiration Date As of As of December 31, 2014 Currently-paying contracts $ 335,905 (1) $ 410,905 (1) Swap 0.717 Various Various $ (1,502 ) $ (241 ) 133,237 (2) 142,965 (2) Swap 0.925 July 17, 2012 April 18, 2017 1,435 669 469,142 553,870 (67 ) 428 Forward-starting contracts — (3) 150,000 Forward-starting Swap 2.091 July 15, 2014 July 15, 2019 — (2,837 ) Total $ 469,142 $ 703,870 $ (67 ) $ (2,409 ) (1) Represents the U.S. dollar tranche of the unsecured term loan. (2) Represents a portion of the Singapore dollar tranche of the unsecured term loan. Translation to U.S. dollars is based on exchange rate of $0.70 to 1.00 SGD as of September 30, 2015 and $0.75 to 1.00 SGD as of December 31, 2014 . (3) In January 2014, we entered into a forward-starting five -year swap contract to protect against adverse fluctuations in interest rates by reducing our exposure to variability in cash flows relating to interest payments on a forecasted issuance of debt. The accrual period of the swap contract was designed to match the tenor of the planned debt issuance. In the fourth quarter of 2014, changes in the forecasted transaction resulted in the discontinuation of cash flow hedge accounting. As such, changes in the fair value of the forward starting swap were recognized in earnings, within the other income (expense) line item. During the three months ended March 31, 2015, the total net loss recognized on the forward starting swap was approximately $1.6 million , and on January 13, 2015, we cash settled the forward starting swap for approximately $5.7 million , including accrued interest. As of September 30, 2015 , we estimate that an additional $1.9 million will be reclassified as an increase to interest expense during the twelve months ended September 30, 2016 , when the hedged forecasted transactions impact earnings.

Fair Value Of Instruments

Fair Value Of Instruments	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Of Instruments	Fair Value of Instruments We disclose fair value information about all financial instruments, whether or not recognized in the condensed consolidated balance sheets, for which it is practicable to estimate fair value. Current accounting guidance requires the Company to disclose fair value information about all financial instruments, whether or not recognized in the balance sheets, for which it is practicable to estimate fair value. The Company’s disclosures of estimated fair value of financial instruments at September 30, 2015 and December 31, 2014 were determined using available market information and appropriate valuation methods. Considerable judgment is necessary to interpret market data and develop estimated fair value. The use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts. The carrying amounts for cash and cash equivalents, restricted cash, accounts and other receivables, accounts payable and other accrued liabilities, accrued dividends and distributions, security deposits and prepaid rents approximate fair value because of the short-term nature of these instruments. As described in Note 14 "Derivative Instruments", the interest rate swaps are recorded at fair value. We calculate the fair value of our mortgage loans, unsecured term loan, unsecured senior notes and exchangeable senior debentures based on currently available market rates assuming the loans are outstanding through maturity and considering the collateral and other loan terms. In determining the current market rate for fixed rate debt, a market spread is added to the quoted yields on federal government treasury securities with similar maturity dates to our debt. The carrying value of our global revolving credit facility approximates fair value, due to the variability of interest rates. As of September 30, 2015 and December 31, 2014 , the aggregate estimated fair value and carrying value of our global revolving credit facility, unsecured term loan, unsecured senior notes and mortgage loans were as follows (in thousands): Categorization under the fair value hierarchy As of September 30, 2015 As of December 31, 2014 Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Global revolving credit facility (1) Level 2 $ 688,957 $ 688,957 $ 525,951 $ 525,951 Unsecured term loan (2) Level 2 938,276 938,276 976,600 976,600 Unsecured senior notes (3)(4) Level 2 2,963,204 2,816,359 2,968,073 2,791,758 Mortgage loans (3) Level 2 319,222 304,987 399,569 378,818 $ 4,909,659 $ 4,748,579 $ 4,870,193 $ 4,673,127 (1) The carrying value of our global revolving credit facility approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings. (2) The carrying value of our unsecured term loan approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings. (3) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2020 Notes, 2021 Notes, 3.950% 2022 Notes, 3.625% 2022 Notes, 2023 Notes and 2025 Notes are valued based on quoted market prices. (4) The carrying value of the 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 2023 Notes and 2025 Notes are net of discount of $17,601 and $15,632 in the aggregate as of September 30, 2015 and December 31, 2014 , respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies (a) Contingent liabilities As part of the acquisition of 29A International Business Park, an asset acquisition in 2010, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined in the agreements for the acquisition. As of December 31, 2014 , certain leases executed subsequent to the acquisition caused an amount to become probable of payment and therefore approximately $12.4 million had been accrued in accounts payable and accrued liabilities and capitalized to buildings and improvements in the condensed consolidated balance sheet as of December 31, 2014 and an earnout payment was made during the three months ended June 30, 2015 in the amount of $17.5 million SGD (or approximately $13.0 million based on the exchange rate on the date of payment). As of September 30, 2015 , $18.9 million had been accrued and capitalized for additional earnout payments. The second and third tranches of the earnout payments are forecasted to be made in 2016 and 2020, respectively. The maximum amount that could be earned by the seller is $50.0 million SGD (or approximately $35.2 million based on the exchange rate as of September 30, 2015 ). The earnout contingency expires in November 2020 . One of the tenants at our Convergence Business Park property has an option to expand as part of their lease agreement, which expires in April 2017 . As part of this option, development activities were not permitted on specifically identified expansion space within the property until April 2014. From April 2014 through April 2017, the tenant has the right of first refusal on any third party’s bona fide offer to buy the adjacent land. If the tenant exercises their option, we may either construct and lease to the tenant an additional shell building on the expansion space at a stipulated rate of return on cost or sell the existing building and the expansion space to the tenant for a price of approximately $24.0 million and $225,000 per square acre, respectively, plus additional adjustments as provided in the lease. As part of the acquisition of the Sentrum Portfolio in July 2012, the seller could earn additional consideration based on future net returns on vacant space to be developed, but not currently leased, as defined in the purchase agreement for the acquisition. The initial estimate of fair value of contingent consideration was approximately £56.5 million (or approximately $87.6 million based on the exchange rate as of July 11, 2012, the acquisition date). We have adjusted the contingent consideration to fair value at each reporting date with changes in fair value recognized in operating income. During the nine months ended September 30, 2015 , we reduced the fair value by approximately £30.3 million . The adjustment was the result of an evaluation by management that no additional leases would be executed for vacant space by July 11, 2015, the contingency expiration date. The final payment on the earnout was made in August 2015. We made earnout payments of approximately £6.2 million (or approximately $10.3 million based on the exchange rates as of the date of each payment) during the nine months ended September 30, 2014 . We made earnout payments of approximately £0.7 million (or approximately $1.1 million based on the exchange rates as of the date of each payment) during the nine months ended September 30, 2015 . The change in fair value of contingent consideration for Sentrum was recorded as an increase to operating expense of approximately $0 and $1.5 million for the three months ended September 30, 2015 and 2014 , respectively. The change in fair value of contingent consideration for Sentrum was recorded as a reduction to operating expense of approximately $43.0 million and $4.1 million for the nine months ended September 30, 2015 and 2014 , respectively. (b) Construction Commitments Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements. From time to time in the normal course of our business, we enter into various construction contracts with third parties that may obligate us to make payments. At September 30, 2015 , we had open commitments related to construction contracts of approximately $135.6 million . (c) Legal Proceedings Although the Company is involved in legal proceedings arising in the ordinary course of business, as of September 30, 2015 , the Company is not currently a party to any legal proceedings nor, to its knowledge, is any legal proceeding threatened against it that it believes would have a material adverse effect on its financial position, results of operations or liquidity.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On October 9, 2015, the Company completed the Telx Acquisition, pursuant to an Agreement and Plan of Merger (the “Merger Agreement”), dated as of July 13, 2015, by and among the Company, Digital Delta, Inc., a Delaware corporation and wholly owned subsidiary of the Company, Telx Holdings, Inc. and BSR LLC, as representative of the sellers. The purchase price for the Telx Acquisition was approximately $1.886 billion (subject to certain adjustments contemplated by the Merger Agreement). The purchase price was paid in cash and was funded with the net proceeds from the (i) public offering of 10,000,000 shares of the Company’s 6.350% series I cumulative redeemable preferred stock, par value $0.01 per share, with a liquidation preference of $25.00 per share, completed on August 24, 2015, (ii) private placement by Digital Delta Holdings, LLC, a Delaware limited liability company and then-wholly owned subsidiary of the Company, of $500 million aggregate principal amount of its 3.400% Notes due 2020 and $450 million aggregate principal amount of its 4.750% Notes due 2025 completed on October 1, 2015, and (iii) sale of 10,500,000 shares of the Company’s common stock on October 8, 2015 for net proceeds of approximately $674.1 million pursuant to certain forward sale agreements entered into in connection with the underwritten public offering of the Company’s common stock completed on July 20, 2015. On October 13, 2015, the Company, as sole general partner of the Operating Partnership executed the Fourteenth Amended and Restated Agreement of Limited Partnership of the Operating Partnership in connection with the Operating Partnership’s issuance to the Company of 10,000,000 of its 6.350% series I cumulative redeemable preferred units of partnership interests, or the series I preferred units, as partial consideration for the Operating Partnership Merger. The series I preferred units have substantially similar rights, preferences and other privileges as the series I preferred stock.

Summary Of Significant Accoun27

Summary Of Significant Accounting Policies (Policy)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Principles Of Consolidation And Basis Of Presentation	(a) Principles of Consolidation and Basis of Presentation The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated. The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014 . The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits: • enhancing investors’ understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business; • eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and • creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes. There are a few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how we operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership and a $242.7 million intercompany loan, which was repaid subsequent to the period covered by this report. As a result, Digital Realty Trust, Inc. generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public securities from time to time and guaranteeing certain unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates. Digital Realty Trust, Inc. itself has not issued any indebtedness but guarantees the unsecured debt of the Operating Partnership and certain of its subsidiaries and affiliates, as disclosed in these notes. The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company’s joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units or loaned to Digital Realty Trust, L.P. on a temporary basis prior to contribution in exchange for partnership units, the Operating Partnership generally generates the capital required by the Company’s business primarily through the Operating Partnership’s operations, by the Operating Partnership’s or its affiliates’ direct or indirect incurrence of indebtedness or through the issuance of partnership units. The presentation of noncontrolling interests in operating partnership, stockholders’ equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners’ capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner’s capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels. To help investors understand the significant differences between the Company and the Operating Partnership, these consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership: • condensed consolidated face financial statements; and • the following notes to the condensed consolidated financial statements: • "Debt of the Company" and "Debt of the Operating Partnership"; • "Income per Share" and "Income per Unit"; and • "Equity and Accumulated Other Comprehensive Income, Net" and "Capital and Accumulated Other Comprehensive Income". In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company generally operates the business through the Operating Partnership.
Cash Equivalents	(b) Cash Equivalents For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of September 30, 2015 , cash equivalents consist of investments in money market instruments.
Investment In Unconsolidated Joint Ventures	(c) Investment in Unconsolidated Joint Ventures The Company’s investment in unconsolidated joint ventures is accounted for using the equity method, whereby the investment is increased for capital contributed and our share of the joint ventures’ net income and decreased by distributions we receive and our share of any losses of the joint ventures. We amortize the difference between the cost of our investments in unconsolidated joint ventures and the book value of the underlying equity into equity in earnings from unconsolidated affiliates on a straight-line basis consistent with the lives of the underlying assets.
Capitalization Of Costs	(d) Capitalization of Costs Direct and indirect project costs that are clearly associated with the development of properties are capitalized as incurred. Project costs include all costs directly associated with the development of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development are not capitalized and are charged to expense as incurred. Capitalization of costs begins when the activities necessary to get the development project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development project is substantially complete and ready for its intended use. Determining when a development project commences, and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development project to be substantially complete and ready for its intended use upon receipt of a certificate of occupancy. If and when development of a property is suspended pursuant to a formal change in the planned use of the property, we will evaluate whether the accumulated costs exceed the estimated value of the project and write off the amount of any such excess accumulated costs. For a development project that is suspended for reasons other than a formal change in the planned use of such property, the accumulated project costs are evaluated for impairment consistent with our impairment policies for long-lived assets. Capitalized costs are allocated to the specific components of a project that are benefited.
Share Based Compensation	(e) Share-Based Compensation The Company measures all share-based compensation awards at fair value on the date they are granted to employees and directors, and recognizes compensation cost, net of forfeitures, over the requisite service period for awards with only a service condition. The estimated fair value of the long-term incentive units and Class D Units (discussed in Note 13 "Incentive Plan") granted by us is being amortized on a straight-line basis over the expected service period. The fair value of share-based compensation awards that contain a market condition is measured using a Monte Carlo simulation method and not adjusted based on actual achievement of the performance goals.
Income Taxes	(f) Income Taxes Digital Realty Trust, Inc. has elected to be treated as a real estate investment trust (a “REIT”) for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. generally is not required to pay federal corporate income tax to the extent taxable income is currently distributed to its stockholders. If Digital Realty Trust, Inc. fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates. The Company is subject to foreign, state and local income taxes in the jurisdictions in which it conducts business. The Company’s U.S. consolidated taxable REIT subsidiaries are subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes current and deferred income taxes for its taxable REIT subsidiaries, certain states and non-U.S. jurisdictions, as appropriate. We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered “more-likely-than-not” to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of September 30, 2015 and December 31, 2014 , we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated income statements. For the three and nine months ended September 30, 2015 and 2014 , we had no such interest or penalties. The tax year 2012 and thereafter remain open to examination by the major taxing jurisdictions with which the Company files tax returns. See Note 10 "Income Taxes" for further discussion on income taxes.
Presentation Of Transactional-Based Taxes	(g) Presentation of Transactional-based Taxes We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis.
Fee Income	(h) Fee Income Occasionally, customers engage the company for certain services. The nature of these services historically involves property management, construction management, and assistance with financing. The proper revenue recognition of these services can be different, depending on whether the arrangements are service revenue or contractor type revenue. Service revenues are typically recognized on an equal monthly basis based on the minimum fee to be earned. The monthly amounts could be adjusted depending on if certain performance milestones are met. Fee income also includes management fees. These fees arise from contractual agreements with entities in which we have a noncontrolling interest. The management fees are recognized as earned under the respective agreements. Management and other fee income related to partially owned entities are recognized to the extent attributable to the unaffiliated interest.
Assets And Liabilities Measured At Fair Value	(i) Assets and Liabilities Measured at Fair Value Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy). Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the lowest level input that is significant would be used to determine the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.
Transactions Expense	(j) Transactions Expense Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and significant transactions.
Management's Estimates	(l) Management’s Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to the valuation of our real estate properties, contingent consideration, accounts receivable and deferred rent receivable, performance-based equity compensation plans, the completeness of accrued liabilities and Digital Realty Trust, Inc.’s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions.
Segment And Geographic Information	(m) Segment and Geographic Information All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of real estate services provided to them are standardized throughout the portfolio. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment.
Recent Accounting Pronouncements	(o) Recent Accounting Pronouncements In February 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which provides guidance on the consolidation evaluation for reporting organizations that are required to evaluate whether they should consolidate certain legal entities. In accordance with the guidance, all legal entities are subject to reevaluation under the revised consolidation model. The guidance is effective in the first quarter of 2016, and early adoption is permitted. We are currently evaluating the potential impact of the adoption of ASU 2015-02 on our consolidated financial statements. On April 1, 2015, the FASB voted to defer the effective date of ASU No. 2014-09, which outlines a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers and notes that lease contracts with customers are a scope exception. Public business entities may elect to adopt the amendments as of the original effective date; however, if the proposed deferral is approved, adoption is required for annual reporting periods beginning after December 15, 2017. We are currently assessing the impact of the guidance on our consolidated financial statements. On April 17, 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs , which requires debt issuance costs to be presented in the balance sheet as a direct deduction from the associated debt liability. Currently, debt issuance costs are recorded as an asset and amortization of these deferred financing costs is recorded in interest expense. Under the new standard, debt issuance costs will continue to be amortized over the life of the debt instrument and amortization will continue to be recorded in interest expense. The new standard is effective for the Company on January 1, 2016 and will be applied on a retrospective basis. The Company is currently evaluating ASU 2015-03, and anticipates a change in our presentation only since the standard does not alter the accounting for debt issuance costs. In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement Period Adjustments (Topic 805) . ASU 2015-16 requires an acquirer in a business combination to recognize provisional amounts when measurements were incomplete as of the end of a reporting period as an adjustment in the reporting period in which the provisional amount is determined. Prior to this standard, the acquirer was required to adjust such provisional amounts by restating prior period financial statements. ASU 2015-16 is effective for the annual period ending December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The Company elected to early adopt this standard effective with the interim period beginning July 1, 2015 and this standard did not have a material effect on the consolidated financial statements.

Investments In Real Estate (Tab

Investments In Real Estate (Tables)	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	We acquired the following real estate properties during the nine months ended September 30, 2015 : Location Metropolitan Area Date Acquired Amount (1) Deer Park 3 (2) Melbourne April 15, 2015 $ 1.6 3 Loyang Way (3)(4) Singapore June 25, 2015 45.0 $ 46.6 (1) Purchase price in U.S. dollars and excludes capitalized closing costs on land acquisitions. Purchase prices for acquisitions outside the United States are based on the exchange rate at the date of acquisition. (2) Represents currently vacant land which is not included in our operating property count. (3) Represents a development property with an existing shell, which is included in our operating property count. This acquisition lacked key inputs to qualify as a business combination under purchase accounting guidance, and has therefore been accounted for as an asset acquisition, not a business combination. (4) Property is subject to a ground lease, which expires in February 2024, with a renewal provision of an additional 28 years upon satisfaction of certain requirements.
Disposal Groups, Including Discontinued Operations	We sold the following real estate properties during the nine months ended September 30, 2015 : Location Metropolitan Area Date Sold Gross Proceeds (in millions) Gain on Sale (in millions) 100 Quannapowitt Parkway Boston February 5, 2015 $ 31.1 $ 10.1 3300 East Birch Street Los Angeles March 31, 2015 14.2 7.5 833 Chestnut Street Philadelphia April 30, 2015 160.8 (1) 76.7 $ 206.1 $ 94.3 (1) Gross proceeds includes a $9.0 million note receivable, which is expected to be collected by year-end.

Investment In Unconsolidated 29

Investment In Unconsolidated Joint Ventures (Tables)	9 Months Ended
	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Summary Of Financial Information For Joint Ventures	The following tables present summarized financial information for the joint ventures as of September 30, 2015 and December 31, 2014 and for the nine months ended September 30, 2015 and 2014 (unaudited, in thousands): As of September 30, 2015 Nine Months Ended September 30, 2015 2015 Net Investment in Properties Total Assets Debt Total Liabilities Equity Revenues Property Operating Expense Net Operating Income Net Income Total Unconsolidated Joint Ventures $ 763,828 $ 939,481 $ 460,418 $ 558,704 $ 380,777 $ 96,407 $ (26,431 ) $ 69,976 $ 28,303 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 103,703 $ 12,170 As of December 31, 2014 Nine Months Ended September 30, 2014 2014 Net Investment in Properties Total Assets Debt Total Liabilities Equity Revenues Property Operating Expense Net Operating Income Net Income Total Unconsolidated Joint Ventures $ 779,752 $ 942,107 $ 461,548 $ 569,895 $ 372,212 $ 71,882 $ (17,409 ) $ 54,473 $ 23,350 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 94,729 $ 9,513

Acquired Intangible Assets An30

Acquired Intangible Assets And Liabilities (Tables)	9 Months Ended
	Sep. 30, 2015
Acquired Intangible Assets And Liabilities [Abstract]
Summary Of Acquired Intangible Assets	The following summarizes our acquired intangible assets (acquired in-place lease value and acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of September 30, 2015 and December 31, 2014 . Balance as of (Amounts in thousands) September 30, 2015 December 31, 2014 Acquired in-place lease value: Gross amount $ 652,629 $ 680,419 Accumulated amortization (460,469 ) (452,739 ) Net $ 192,160 $ 227,680 Acquired above-market leases: Gross amount $ 118,881 $ 126,677 Accumulated amortization (88,264 ) (88,072 ) Net $ 30,617 $ 38,605 Acquired below-market leases: Gross amount $ 278,514 $ 282,670 Accumulated amortization (189,882 ) (178,435 ) Net $ 88,632 $ 104,235
Schedule Of Estimated Annual Amortization Of Below Market Leases	Estimated annual amortization of acquired below-market leases, net of acquired above-market leases, for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows: (Amounts in thousands) Remainder of 2015 $ 1,994 2016 7,554 2017 6,143 2018 4,534 2019 4,610 Thereafter 33,180 Total $ 58,015
Schedule Of Estimated Annual Amortization Of Acquired In Place Leases	Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing October 1, 2015 is as follows: (Amounts in thousands) Remainder of 2015 $ 8,371 2016 31,893 2017 27,367 2018 25,100 2019 22,600 Thereafter 76,829 Total $ 192,160

Debt of the Operating Partner31

Debt of the Operating Partnership (Tables) - Digital Realty Trust, L.P.	9 Months Ended
	Sep. 30, 2015
Debt Instrument [Line Items]
Summary Of Outstanding Indebtedness Of The Operating Partnership	A summary of outstanding indebtedness of the Operating Partnership as of September 30, 2015 and December 31, 2014 is as follows (in thousands): Indebtedness Interest Rate at September 30, 2015 Maturity Date Principal Outstanding September 30, 2015 Principal Outstanding December 31, 2014 Global revolving credit facility Various (1) Nov 3, 2017 $ 688,957 (2) $ 525,951 (2) Unsecured term loan Various (3)(6) Apr 16, 2017 938,276 (4) 976,600 (4) Unsecured senior notes: Prudential Shelf Facility: Series C 9.680% Jan 6, 2016 25,000 25,000 Series D 4.570% Jan 20, 2015 — (7) 50,000 Series E 5.730% Jan 20, 2017 50,000 50,000 Series F 4.500% Feb 3, 2015 — (7) 17,000 Total Prudential Shelf Facility 75,000 142,000 Senior Notes: 4.50% notes due 2015 4.500% Jul 15, 2015 (8) — 375,000 5.875% notes due 2020 5.875% Feb 1, 2020 500,000 500,000 5.25% notes due 2021 5.250% Mar 15, 2021 400,000 400,000 3.95% notes due 2022 3.950% Jul 1, 2022 (9) 500,000 — 3.625% notes due 2022 3.625% Oct 1, 2022 300,000 300,000 4.75% notes due 2023 4.750% Oct 13, 2023 453,840 (10) 467,310 (10) 4.25% notes due 2025 4.250% Jan 17, 2025 605,120 (10) 623,080 (10) Unamortized discounts (17,601 ) (15,632 ) Total senior notes, net of discount 2,741,359 2,649,758 Total unsecured senior notes, net of discount 2,816,359 2,791,758 Indebtedness Interest Rate at September 30, 2015 Maturity Date Principal Outstanding September 30, 2015 Principal Outstanding December 31, 2014 Mortgage loans: 200 Paul Avenue 1-4 (5) 5.74% Oct 8, 2015 — (11) 68,665 2045 & 2055 Lafayette Street (5) 5.93% Feb 6, 2017 61,728 62,563 34551 Ardenwood Boulevard 1-4 (5) 5.95% Nov 11, 2016 50,700 51,339 1100 Space Park Drive (5) 5.89% Dec 11, 2016 50,648 51,295 600 West Seventh Street 5.80% Mar 15, 2016 46,466 47,825 150 South First Street (5) 6.30% Feb 6, 2017 48,699 49,316 2334 Lundy Place (5) 5.96% Nov 11, 2016 36,875 37,340 8025 North Interstate 35 4.09% Mar 6, 2016 5,857 6,057 731 East Trade Street 8.22% Jul 1, 2020 3,539 3,836 Unamortized net premiums 475 582 Total mortgage loans, including premiums 304,987 378,818 Total indebtedness $ 4,748,579 $ 4,673,127 _________________________________ (1) The interest rate for borrowings under the global revolving credit facility equals the applicable index plus a margin of 110 basis points, which is based on the current credit ratings of our long-term debt. An annual facility fee of 20 basis points, which is based on the credit ratings of our long-term debt, is due and payable quarterly on the total commitment amount of the facility. Two six -month extensions are available, which we may exercise if certain conditions are met. (2) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of September 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate Floating Rate Borrowing (a) U.S. dollar ($) $ 50,000 1.29 % $ 90,000 1.27 % British pound sterling (£) 110,434 (c) 1.62 % 132,716 (d) 1.61 % Euro (€) 214,822 (c) 1.00 % 58,071 (d) 1.13 % Australian dollar (AUD) 88,497 (c) 3.15 % 72,676 (d) 3.74 % Hong Kong dollar (HKD) 88,476 (c) 1.36 % 79,336 (d) 1.34 % Japanese yen (JPY) 14,265 (c) 1.13 % 13,201 (d) 1.17 % Singapore dollar (SGD) 46,475 (c) 2.42 % 6,565 (d) 1.64 % Canadian dollar (CAD) 70,988 (c) 1.86 % 62,386 (d) 2.39 % Total $ 683,957 1.63 % $ 514,951 1.84 % Base Rate Borrowing (b) U.S. dollar ($) $ 5,000 3.35 % $ 11,000 3.35 % Total borrowings $ 688,957 1.65 % $ 525,951 1.87 % (a) The interest rates for floating rate borrowings under the global revolving credit facility equal the applicable index plus a margin of 110 basis points, which is based on the credit ratings of our long-term debt. (b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt. (c) Based on exchange rates of $1.51 to £1.00 , $1.12 to €1.00 , $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.70 to 1.00 SGD and $0.75 to 1.00 CAD, respectively, as of September 30, 2015 . (d) Based on exchange rates of $1.56 to £1.00 , $1.21 to €1.00 , $0.82 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.75 to 1.00 SGD and $0.86 to 1.00 CAD, respectively, as of December 31, 2014 . (3) Interest rates are based on our current senior unsecured debt ratings and are 120 basis points over the applicable index for floating rate advances. Two six -month extensions are available, which we may exercise if certain conditions are met. (4) Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of September 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate U.S. dollar ($) $ 410,905 1.40 % (b) $ 410,905 1.36 % (d) Singapore dollar (SGD) 160,659 (a) 2.08 % (b) 172,426 (c) 1.45 % (d) British pound sterling (£) 182,935 (a) 1.78 % 188,365 (c) 1.76 % Euro (€) 111,211 (a) 1.20 % 120,375 (c) 1.22 % Australian dollar (AUD) 72,566 (a) 3.34 % 84,529 (c) 3.98 % Total $ 938,276 1.72 % (b) $ 976,600 1.66 % (d) (a) Based on exchange rates of $0.70 to 1.00 SGD, $1.51 to £1.00 , $1.12 to €1.00 and $0.70 to 1.00 AUD, respectively, as of September 30, 2015 . (b) As of September 30, 2015 , the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.16% (Singapore dollar) and 1.94% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps. (c) Based on exchange rates of $0.75 to 1.00 SGD, $1.56 to £1.00 , $1.21 to €1.00 and $0.82 to 1.00 AUD, respectively, as of December 31, 2014 . (d) As of December 31, 2014 , the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.01% (Singapore dollar) and 2.00% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps. (5) The respective borrower’s assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person. (6) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by the U.S. dollar and Singapore dollar tranches of the unsecured term loan. See Note 14 "Derivative Instruments" for further information. (7) These unsecured senior notes were repaid in full at maturity. (8) On May 26, 2015, the Operating Partnership redeemed the entire outstanding principal amount of its 4.500% Notes due 2015 (2015 Notes), at a redemption price of 100% of the principal amount of the 2015 Notes plus accrued and unpaid interest thereon up to, but excluding, the redemption date. (9) On June 23, 2015, the Operating Partnership issued $500.0 million in aggregate principal amount of notes, maturing on July 1, 2022 with an interest rate of 3.950% per annum. The purchase price paid by the initial purchasers was 99.236% of the principal amount. (10) Based on exchange rate of $1.51 to £1.00 as of September 30, 2015 and $1.56 to £1.00 as of December 31, 2014 . (11) This loan was repaid in full in September 2015.
Schedule Of Balances And Foreign Currency Translation Revolving Credit Facilities	Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of September 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate U.S. dollar ($) $ 410,905 1.40 % (b) $ 410,905 1.36 % (d) Singapore dollar (SGD) 160,659 (a) 2.08 % (b) 172,426 (c) 1.45 % (d) British pound sterling (£) 182,935 (a) 1.78 % 188,365 (c) 1.76 % Euro (€) 111,211 (a) 1.20 % 120,375 (c) 1.22 % Australian dollar (AUD) 72,566 (a) 3.34 % 84,529 (c) 3.98 % Total $ 938,276 1.72 % (b) $ 976,600 1.66 % (d) (a) Based on exchange rates of $0.70 to 1.00 SGD, $1.51 to £1.00 , $1.12 to €1.00 and $0.70 to 1.00 AUD, respectively, as of September 30, 2015 . (b) As of September 30, 2015 , the weighted-average interest rate reflecting interest rate swaps was 1.88% (U.S. dollar), 2.16% (Singapore dollar) and 1.94% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps. (c) Based on exchange rates of $0.75 to 1.00 SGD, $1.56 to £1.00 , $1.21 to €1.00 and $0.82 to 1.00 AUD, respectively, as of December 31, 2014 . (d) As of December 31, 2014 , the weighted-average interest rate reflecting interest rate swaps was 1.92% (U.S. dollar), 2.01% (Singapore dollar) and 2.00% (Total). See Note 14 "Derivative Instruments" for further discussion on interest rate swaps. Balances as of September 30, 2015 and December 31, 2014 are as follows (balances, in thousands): Denomination of Draw Balance as of September 30, 2015 Weighted-average interest rate Balance as of December 31, 2014 Weighted-average interest rate Floating Rate Borrowing (a) U.S. dollar ($) $ 50,000 1.29 % $ 90,000 1.27 % British pound sterling (£) 110,434 (c) 1.62 % 132,716 (d) 1.61 % Euro (€) 214,822 (c) 1.00 % 58,071 (d) 1.13 % Australian dollar (AUD) 88,497 (c) 3.15 % 72,676 (d) 3.74 % Hong Kong dollar (HKD) 88,476 (c) 1.36 % 79,336 (d) 1.34 % Japanese yen (JPY) 14,265 (c) 1.13 % 13,201 (d) 1.17 % Singapore dollar (SGD) 46,475 (c) 2.42 % 6,565 (d) 1.64 % Canadian dollar (CAD) 70,988 (c) 1.86 % 62,386 (d) 2.39 % Total $ 683,957 1.63 % $ 514,951 1.84 % Base Rate Borrowing (b) U.S. dollar ($) $ 5,000 3.35 % $ 11,000 3.35 % Total borrowings $ 688,957 1.65 % $ 525,951 1.87 % (a) The interest rates for floating rate borrowings under the global revolving credit facility equal the applicable index plus a margin of 110 basis points, which is based on the credit ratings of our long-term debt. (b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate plus a margin of 10 basis points, which is based on the credit ratings of our long-term debt. (c) Based on exchange rates of $1.51 to £1.00 , $1.12 to €1.00 , $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.70 to 1.00 SGD and $0.75 to 1.00 CAD, respectively, as of September 30, 2015 . (d) Based on exchange rates of $1.56 to £1.00 , $1.21 to €1.00 , $0.82 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.75 to 1.00 SGD and $0.86 to 1.00 CAD, respectively, as of December 31, 2014 .
Schedule Of Debt Maturities And Principal Maturities	The table below summarizes our debt maturities and principal payments as of September 30, 2015 (in thousands): Global Revolving Credit Facility (1) Unsecured (1) Prudential Shelf Facility Senior Notes Mortgage Loans Total Debt Remainder of 2015 $ — $ — $ — $ — $ 1,768 $ 1,768 2016 — — 25,000 — 191,979 216,979 2017 688,957 938,276 50,000 — 108,395 1,785,628 2018 — — — — 593 593 2019 — — — — 644 644 Thereafter — — — 2,758,960 1,133 2,760,093 Subtotal $ 688,957 $ 938,276 $ 75,000 $ 2,758,960 $ 304,512 $ 4,765,705 Unamortized discount — — — (17,601 ) — (17,601 ) Unamortized premium — — — — 475 475 Total $ 688,957 $ 938,276 $ 75,000 $ 2,741,359 $ 304,987 $ 4,748,579 (1) Subject to 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)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Summary Of Basic And Diluted Earnings Per Share	The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Net income available to common stockholders $ 38,522 $ 109,314 $ 257,305 $ 185,010 Weighted average shares outstanding—basic 135,832,503 135,492,618 135,782,831 132,635,894 Potentially dilutive common shares: Stock options 19,983 52,629 20,629 46,649 Unvested incentive units 86,190 129,024 65,752 61,122 Series I Cumulative Redeemable Preferred Stock 1,703,182 — 567,727 — Market performance-based awards 618,078 272,262 483,538 109,301 Weighted average shares outstanding—diluted 138,259,936 135,946,533 136,920,477 132,852,966 Income per share: Basic $ 0.28 $ 0.81 $ 1.89 $ 1.39 Diluted $ 0.28 $ 0.80 $ 1.88 $ 1.39
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share	We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 2,635,444 2,815,512 2,698,215 2,745,730 Potentially dilutive 2029 Debentures — — — 2,617,790 Potentially dilutive Series E Cumulative Redeemable Preferred Stock 4,567,661 4,673,322 4,440,429 5,136,112 Potentially dilutive Series F Cumulative Redeemable Preferred Stock 2,896,800 2,963,810 2,816,110 3,257,310 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 3,960,900 4,052,525 3,850,569 4,453,839 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 5,804,286 5,938,553 5,642,608 4,111,306 Shares subject to Forward Equity Offering 10,500,000 — 10,500,000 — 30,365,091 20,443,722 29,947,931 22,322,087

Income per Unit (Tables)

Income per Unit (Tables)	9 Months Ended
	Sep. 30, 2015
Summary Of Basic And Diluted Earnings Per Share	The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Net income available to common stockholders $ 38,522 $ 109,314 $ 257,305 $ 185,010 Weighted average shares outstanding—basic 135,832,503 135,492,618 135,782,831 132,635,894 Potentially dilutive common shares: Stock options 19,983 52,629 20,629 46,649 Unvested incentive units 86,190 129,024 65,752 61,122 Series I Cumulative Redeemable Preferred Stock 1,703,182 — 567,727 — Market performance-based awards 618,078 272,262 483,538 109,301 Weighted average shares outstanding—diluted 138,259,936 135,946,533 136,920,477 132,852,966 Income per share: Basic $ 0.28 $ 0.81 $ 1.89 $ 1.39 Diluted $ 0.28 $ 0.80 $ 1.88 $ 1.39
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share	We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 2,635,444 2,815,512 2,698,215 2,745,730 Potentially dilutive 2029 Debentures — — — 2,617,790 Potentially dilutive Series E Cumulative Redeemable Preferred Stock 4,567,661 4,673,322 4,440,429 5,136,112 Potentially dilutive Series F Cumulative Redeemable Preferred Stock 2,896,800 2,963,810 2,816,110 3,257,310 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 3,960,900 4,052,525 3,850,569 4,453,839 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 5,804,286 5,938,553 5,642,608 4,111,306 Shares subject to Forward Equity Offering 10,500,000 — 10,500,000 — 30,365,091 20,443,722 29,947,931 22,322,087
Digital Realty Trust, L.P.
Summary Of Basic And Diluted Earnings Per Share	The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts): Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Net income available to common unitholders $ 38,116 $ 111,586 $ 261,302 $ 188,848 Weighted average units outstanding—basic 138,467,947 138,308,130 138,481,046 135,381,624 Potentially dilutive common units: Stock options 19,983 52,629 20,629 46,649 Unvested incentive units 86,190 129,024 65,752 61,122 Market performance-based awards 618,078 272,262 483,538 109,301 Weighted average units outstanding—diluted 139,192,198 138,762,045 139,050,965 135,598,696 Income per unit: Basic $ 0.28 $ 0.81 $ 1.89 $ 1.39 Diluted $ 0.27 $ 0.80 $ 1.88 $ 1.39
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share	We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Potentially dilutive 2029 Debentures — 1,121,910 — 3,948,379 Potentially dilutive Series E Cumulative Redeemable Preferred Units 4,567,661 5,060,744 4,440,429 5,367,507 Potentially dilutive Series F Cumulative Redeemable Preferred Units 2,896,800 3,209,512 2,816,110 3,404,060 Potentially dilutive Series G Cumulative Redeemable Preferred Units 3,960,900 4,388,483 3,850,569 4,654,496 Potentially dilutive Series H Cumulative Redeemable Preferred Units 5,804,286 6,437,332 5,642,608 3,449,841 Units subject to Forward Equity Offering 10,500,000 — 10,500,000 — 27,729,647 20,217,981 27,249,716 20,824,283

Equity And Accumulated Other 34

Equity And Accumulated Other Comprehensive Income, Net (Tables)	9 Months Ended
	Sep. 30, 2015
Equity And Accumulated Other Comprehensive Income, Net [Abstract]
Ownership Interest In The Operating Partnership	The following table shows the ownership interests in the Operating Partnership as of September 30, 2015 and December 31, 2014 : September 30, 2015 December 31, 2014 Number of units Percentage of total Number of units Percentage of total Digital Realty Trust, Inc. 135,843,684 98.0 % 135,626,255 97.8 % Noncontrolling interests consist of: Common units held by third parties 1,421,314 1.0 1,463,814 1.1 Incentive units held by employees and directors (see Note 13) 1,414,299 1.0 1,549,847 1.1 138,679,297 100.0 % 138,639,916 100.0 %
Summary Of Activity For Noncontrolling Interests In The Operating Partnership	The following table shows activity for the noncontrolling interests in the Operating Partnership for the nine months ended September 30, 2015 : Common Units Incentive Units Total As of December 31, 2014 1,463,814 1,549,847 3,013,661 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (42,500 ) — (42,500 ) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) — (76,087 ) (76,087 ) Cancellation of incentive units held by employees and directors — (150,140 ) (150,140 ) Grant of incentive units to employees and directors — 90,679 90,679 As of September 30, 2015 1,421,314 1,414,299 2,835,613 (1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.
Schedule Of Dividends/Distributions	We have declared and paid the following dividends on our common and preferred stock for the nine months ended September 30, 2015 (in thousands, except per share data): Date dividend declared Dividend payment date Series E Preferred Stock Series F Preferred Stock Series G Preferred Stock Series H Preferred Stock Common Stock February 25, 2015 March 31, 2015 $ 5,031 $ 3,023 $ 3,672 $ 6,730 $ 115,419 May 12, 2015 June 30, 2015 5,031 3,023 3,672 6,730 115,458 August 11, 2015 September 30, 2015 5,031 3,023 3,672 6,730 115,454 $ 15,093 $ 9,069 $ 11,016 $ 20,190 $ 346,331 Annual rate of dividend per share $ 1.750 $ 1.656 $ 1.469 $ 1.844 $ 3.400
Schedule Of Accumulated Other Comprehensive Income, Net	The accumulated balances for each item within other comprehensive income, net are as follows (in thousands): Foreign currency Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (39,567 ) $ (5,479 ) $ (45,046 ) Net current period change (40,688 ) (1) (4,290 ) (44,978 ) Reclassification to interest expense from interest rate swaps — 2,036 2,036 Balance as of September 30, 2015 $ (80,255 ) $ (7,733 ) $ (87,988 ) (1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

Capital And Accumulated Other35

Capital And Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2015
Schedule Of Dividends/Distributions	We have declared and paid the following dividends on our common and preferred stock for the nine months ended September 30, 2015 (in thousands, except per share data): Date dividend declared Dividend payment date Series E Preferred Stock Series F Preferred Stock Series G Preferred Stock Series H Preferred Stock Common Stock February 25, 2015 March 31, 2015 $ 5,031 $ 3,023 $ 3,672 $ 6,730 $ 115,419 May 12, 2015 June 30, 2015 5,031 3,023 3,672 6,730 115,458 August 11, 2015 September 30, 2015 5,031 3,023 3,672 6,730 115,454 $ 15,093 $ 9,069 $ 11,016 $ 20,190 $ 346,331 Annual rate of dividend per share $ 1.750 $ 1.656 $ 1.469 $ 1.844 $ 3.400
Schedule Of Accumulated Other Comprehensive Income, Net	The accumulated balances for each item within other comprehensive income, net are as follows (in thousands): Foreign currency Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (39,567 ) $ (5,479 ) $ (45,046 ) Net current period change (40,688 ) (1) (4,290 ) (44,978 ) Reclassification to interest expense from interest rate swaps — 2,036 2,036 Balance as of September 30, 2015 $ (80,255 ) $ (7,733 ) $ (87,988 ) (1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.
Digital Realty Trust, L.P.
Schedule Of Dividends/Distributions	The Operating Partnership has declared and paid the following distributions on its common and preferred units for the nine months ended September 30, 2015 (in thousands, except for per unit data): Date distribution declared Distribution 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 August 11, 2015 September 30, 2015 5,031 3,023 3,672 6,730 117,962 $ 15,093 $ 9,069 $ 11,016 $ 20,190 $ 353,796 Annual rate of distribution per unit $ 1.750 $ 1.656 $ 1.469 $ 1.844 $ 3.400
Schedule Of Accumulated Other Comprehensive Income, Net	The accumulated balances for each item within other comprehensive income are as follows (in thousands): Foreign currency Cash flow hedge Accumulated other Balance as of December 31, 2014 $ (42,138 ) $ (6,295 ) $ (48,433 ) Net current period change (41,480 ) (1) (4,374 ) (45,854 ) Reclassification to interest expense from interest rate swaps — 2,077 2,077 Balance as of September 30, 2015 $ (83,618 ) $ (8,592 ) $ (92,210 ) (1) During the first nine months of 2015, the U.S. dollar was generally stronger against the other currencies in which we transacted business, primarily the Euro and British pound sterling.

Incentive Plan (Tables)

Incentive Plan (Tables)	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary Of Long-Term Incentive Unit Activity	Below is a summary of our long-term incentive unit activity for the nine months ended September 30, 2015 . Unvested Long-term Incentive Units Units Weighted-Average Grant Date Fair Value Unvested, beginning of period 314,415 $ 59.34 Granted 90,679 64.79 Vested (157,300 ) 60.25 Cancelled or expired (22,496 ) 58.13 Unvested, end of period 225,298 61.03
Market Performance Based Awards	In the event that the RMS Relative Market Performance during the Market Performance Period is achieved at the “threshold,” “target” or “high” level as set forth below, the awards will become vested as to the market condition with respect to the percentage of Class D units or RSUs, as applicable, set forth below: Level RMS Relative Market Performance (2014 Awards) RMS Relative Market Performance Vesting Percentage Below Threshold Level < 0 basis points < -300 basis points 0 % Threshold Level 0 basis points -300 basis points 25 % Target Level 325 basis points 100 basis points 50 % High Level > 650 basis points > 500 basis points 100 %
Summary Of Incentive Award Plan's Stock Option	The following table summarizes the Amended and Restated 2004 Incentive Award Plan’s stock option activity for the nine -month period ended September 30, 2015 : Period Ended September 30, 2015 Shares Weighted average exercise price Options outstanding, beginning of period 80,933 $ 37.25 Exercised (26,961 ) 29.61 Options outstanding, end of period 53,972 $ 41.07 Exercisable, end of period 53,972 $ 41.07
Summary Of Stock Options Outstanding And Exercisable	The following table summarizes information about stock options outstanding and exercisable as of September 30, 2015 : Options outstanding and exercisable Exercise price Number outstanding Weighted-average remaining contractual life (years) Weighted-average exercise price Aggregate intrinsic value $33.18 4,175 1.09 33.18 $ 134,185 $41.73 49,797 1.59 41.73 1,174,711 Total / Weighted-average 53,972 1.55 $ 41.07 $ 1,308,896
Summary Of Restricted Stock Activity	Below is a summary of our restricted stock activity for the nine months ended September 30, 2015 . Unvested Restricted Stock Shares Weighted-Average Grant Date Fair Value Unvested, beginning of period 302,298 $ 57.10 Granted 105,165 66.65 Vested (90,871 ) 59.48 Cancelled or expired (33,284 ) 57.16 Unvested, end of period 283,308 61.25

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of Outstanding Derivative Instruments	As of September 30, 2015 and December 31, 2014 , we had the following outstanding interest rate derivatives that were designated as effective cash flow hedges of interest rate risk (in thousands): Notional Amount Fair Value at Significant Other Observable Inputs (Level 2) As of September 30, 2015 As of December 31, 2014 Type of Derivative Strike Rate Effective Date Expiration Date As of As of December 31, 2014 Currently-paying contracts $ 335,905 (1) $ 410,905 (1) Swap 0.717 Various Various $ (1,502 ) $ (241 ) 133,237 (2) 142,965 (2) Swap 0.925 July 17, 2012 April 18, 2017 1,435 669 469,142 553,870 (67 ) 428 Forward-starting contracts — (3) 150,000 Forward-starting Swap 2.091 July 15, 2014 July 15, 2019 — (2,837 ) Total $ 469,142 $ 703,870 $ (67 ) $ (2,409 ) (1) Represents the U.S. dollar tranche of the unsecured term loan. (2) Represents a portion of the Singapore dollar tranche of the unsecured term loan. Translation to U.S. dollars is based on exchange rate of $0.70 to 1.00 SGD as of September 30, 2015 and $0.75 to 1.00 SGD as of December 31, 2014 . (3) In January 2014, we entered into a forward-starting five -year swap contract to protect against adverse fluctuations in interest rates by reducing our exposure to variability in cash flows relating to interest payments on a forecasted issuance of debt. The accrual period of the swap contract was designed to match the tenor of the planned debt issuance. In the fourth quarter of 2014, changes in the forecasted transaction resulted in the discontinuation of cash flow hedge accounting. As such, changes in the fair value of the forward starting swap were recognized in earnings, within the other income (expense) line item. During the three months ended March 31, 2015, the total net loss recognized on the forward starting swap was approximately $1.6 million , and on January 13, 2015, we cash settled the forward starting swap for approximately $5.7 million , including accrued interest.

Fair Value Of Instruments (Tabl

Fair Value Of Instruments (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Estimated Fair Value And Carrying Amounts	As of September 30, 2015 and December 31, 2014 , the aggregate estimated fair value and carrying value of our global revolving credit facility, unsecured term loan, unsecured senior notes and mortgage loans were as follows (in thousands): Categorization under the fair value hierarchy As of September 30, 2015 As of December 31, 2014 Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Global revolving credit facility (1) Level 2 $ 688,957 $ 688,957 $ 525,951 $ 525,951 Unsecured term loan (2) Level 2 938,276 938,276 976,600 976,600 Unsecured senior notes (3)(4) Level 2 2,963,204 2,816,359 2,968,073 2,791,758 Mortgage loans (3) Level 2 319,222 304,987 399,569 378,818 $ 4,909,659 $ 4,748,579 $ 4,870,193 $ 4,673,127 (1) The carrying value of our global revolving credit facility approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings. (2) The carrying value of our unsecured term loan approximates estimated fair value, due to the variability of interest rates and the stability of our credit ratings. (3) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2020 Notes, 2021 Notes, 3.950% 2022 Notes, 3.625% 2022 Notes, 2023 Notes and 2025 Notes are valued based on quoted market prices. (4) The carrying value of the 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 2023 Notes and 2025 Notes are net of discount of $17,601 and $15,632 in the aggregate as of September 30, 2015 and December 31, 2014 , respectively.

Organization And Description 39

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

Summary Of Significant Accoun40

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

Investments In Real Estate (Det

Investments In Real Estate (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015USD ($)property	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)property	Sep. 30, 2014USD ($)	Dec. 31, 2014USD ($)property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire property			$ 46,600
Gross Proceeds	$ 206,100		206,100
Gain on Sale			94,300
Impairment of investments in real estate	0	$ 12,500	0	$ 12,500	$ 126,500
Assets	9,501,013		9,501,013		9,526,784
Total liabilities	5,465,362		5,465,362		$ 5,612,546
Deer Park 3
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire property			1,600
3 Loyang Way
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to acquire property			$ 45,000
Renewal term			28 years
100 Quannapowitt Parkway
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	31,100		$ 31,100
Gain on Sale			10,100
3300 East Birch Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	14,200		14,200
Gain on Sale			7,500
833 Chestnut Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	160,800		160,800
Gain on Sale			76,700
833 Chestnut Street | Notes Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	$ 9,000		$ 9,000
Midwest and Northeast Regions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property					5
Fiscal Year-End 2014 Identified Properties for Disposal
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property	5		5
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property	3		3
Assets	$ 173,500		$ 173,500
Total liabilities	$ 6,900		$ 6,900
Held-for-sale | Assets Identified for Disposal Subsequent to First Quarter 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties | property	8		8

Investment In Unconsolidated 42

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

Investment In Unconsolidated 43

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

Acquired Intangible Assets An44

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

Acquired Intangible Assets An45

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

Acquired Intangible Assets An46

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

Acquired Intangible Assets An47

Acquired Intangible Assets And Liabilities (Schedule Of Estimated Annual Amortization Of Acquired In Place Leases) (Details) $ in Thousands	Sep. 30, 2015USD ($)
Acquired Intangible Assets And Liabilities [Abstract]
Remainder of 2015	$ 8,371
2,016	31,893
2,017	27,367
2,018	25,100
2,019	22,600
Thereafter	76,829
Net	$ 192,160

Debt of the Company (Details)

Debt of the Company (Details) - Senior Notes:	9 Months Ended
	Sep. 30, 2015	Jun. 23, 2015
5.875% notes due 2020
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.875%
Maturity date	2,020
5.25% notes due 2021
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.25%
Maturity date	2,021
3.625% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	3.625%
Maturity date	2,022
3.95% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	3.95%	3.95%
4.75% notes due 2023
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	4.75%
Maturity date	2,023
4.25% notes due 2025
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	4.25%
Maturity date	2,025
3.400% Notes Due 2020
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	3.40%
4.750% Notes Due 2025
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	4.75%

Debt of the Operating Partner49

Debt of the Operating Partnership (Summary of Outstanding Indebtedness) (Details)	Jun. 23, 2015USD ($)	May. 26, 2015	Sep. 30, 2015USD ($)extension$ / £	Dec. 31, 2014USD ($)$ / £
Debt Instrument [Line Items]
Unsecured senior notes, net of discount			$ 2,816,359,000	$ 2,791,758,000
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of September 30, 2015			688,957,000	525,951,000
Unsecured term loan
Debt Instrument [Line Items]
Balance as of September 30, 2015			$ 938,276,000	976,600,000
Senior Notes: | 5.875% notes due 2020
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.875%
Senior Notes: | 5.25% notes due 2021
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.25%
Senior Notes: | 3.95% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	3.95%		3.95%
Unamortized discounts	$ (3,800,000)
Face amount	$ 500,000,000
Principal received relative to par value	99.236%
Senior Notes: | 3.625% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			3.625%
Senior Notes: | 4.75% notes due 2023
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.75%
Senior Notes: | 4.25% notes due 2025
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.25%
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Subtotal			$ 4,765,705,000
Unamortized discounts			(17,601,000)
Unsecured senior notes, net of discount			$ 2,816,359,000	$ 2,791,758,000
Digital Realty Trust, L.P. | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £			1.51	1.56
Digital Realty Trust, L.P. | Global revolving credit facility
Debt Instrument [Line Items]
Maturity Date			Nov. 3, 2017
Balance as of September 30, 2015			$ 688,957,000	$ 525,951,000
Subtotal			688,957,000
Unamortized discounts			$ 0
Number of extension options | extension			2
Debt instrument, extension term			6 months
Facility fee			0.20%
Digital Realty Trust, L.P. | Global revolving credit facility | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £			1.51	1.56
Digital Realty Trust, L.P. | Global revolving credit facility | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015			$ 683,957,000	$ 514,951,000
Interest rate basis spread			1.10%
Digital Realty Trust, L.P. | Global revolving credit facility | Floating Rate | GBP
Debt Instrument [Line Items]
Balance as of September 30, 2015			$ 110,434,000	132,716,000
Digital Realty Trust, L.P. | Unsecured term loan
Debt Instrument [Line Items]
Maturity Date			Apr. 16, 2017
Balance as of September 30, 2015			$ 938,276,000	976,600,000
Subtotal			938,276,000
Unamortized discounts			$ 0
Number of extension options | extension			2
Debt instrument, extension term			6 months
Interest rate basis spread			1.20%
Digital Realty Trust, L.P. | Unsecured term loan | GBP
Debt Instrument [Line Items]
Balance as of September 30, 2015			$ 182,935,000	188,365,000
Digital Realty Trust, L.P. | Unsecured term loan | Floating Rate
Debt Instrument [Line Items]
Number of extension options | extension			2
Debt instrument, extension term			6 months
Digital Realty Trust, L.P. | Prudential Shelf Facility:
Debt Instrument [Line Items]
Subtotal			$ 75,000,000	142,000,000
Unamortized discounts			$ 0
Digital Realty Trust, L.P. | Prudential Shelf Facility: | Series C
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			9.68%
Maturity Date			Jan. 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 September 30, 2015			4.57%
Maturity Date			Jan. 20, 2015
Subtotal			$ 0	50,000,000
Digital Realty Trust, L.P. | Prudential Shelf Facility: | Series E
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.73%
Maturity Date			Jan. 20, 2017
Subtotal			$ 50,000,000	50,000,000
Digital Realty Trust, L.P. | Prudential Shelf Facility: | Series F
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.50%
Maturity Date			Feb. 3, 2015
Subtotal			$ 0	17,000,000
Digital Realty Trust, L.P. | Senior Notes:
Debt Instrument [Line Items]
Subtotal			2,758,960,000
Unamortized discounts			(17,601,000)	(15,632,000)
Unsecured senior notes, net of discount			$ 2,741,359,000	2,649,758,000
Digital Realty Trust, L.P. | Senior Notes: | 4.50% notes due 2015
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.50%
Maturity Date			Jul. 15, 2015
Subtotal			$ 0	375,000,000
Redemption price		100.00%
Digital Realty Trust, L.P. | Senior Notes: | 5.875% notes due 2020
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.875%
Maturity Date			Feb. 1, 2020
Subtotal			$ 500,000,000	500,000,000
Digital Realty Trust, L.P. | Senior Notes: | 5.25% notes due 2021
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			5.25%
Maturity Date			Mar. 15, 2021
Subtotal			$ 400,000,000	400,000,000
Digital Realty Trust, L.P. | Senior Notes: | 3.95% notes due 2022
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			3.95%
Maturity Date			Jul. 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 September 30, 2015			3.625%
Maturity Date			Oct. 1, 2022
Subtotal			$ 300,000,000	300,000,000
Digital Realty Trust, L.P. | Senior Notes: | 4.75% notes due 2023
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.75%
Maturity Date			Oct. 13, 2023
Subtotal			$ 453,840,000	467,310,000
Digital Realty Trust, L.P. | Senior Notes: | 4.25% notes due 2025
Debt Instrument [Line Items]
Interest Rate at September 30, 2015			4.25%
Maturity Date			Jan. 17, 2025
Subtotal			$ 605,120,000	$ 623,080,000

Debt of the Operating Partner50

Debt of the Operating Partnership (Mortgage Loans) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Mortgage loans, including premiums	$ 304,987	$ 378,818
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Mortgage loans, including premiums	304,987	378,818
Unamortized net premiums	475
Total indebtedness	4,748,579	4,673,127
Digital Realty Trust, L.P. | Mortgage Loans
Debt Instrument [Line Items]
Unamortized net premiums	475	582
Total indebtedness	$ 304,987	378,818
Digital Realty Trust, L.P. | Mortgage Loans | 200 Paul Avenue
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.74%
Maturity Date	Oct. 8, 2015
Mortgage loans, including premiums	$ 0	68,665
Digital Realty Trust, L.P. | Mortgage Loans | 2045 & 2055 Lafayette Street
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.93%
Maturity Date	Feb. 6, 2017
Mortgage loans, including premiums	$ 61,728	62,563
Digital Realty Trust, L.P. | Mortgage Loans | 34551 Ardenwood Boulevard 1-4
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.95%
Maturity Date	Nov. 11, 2016
Mortgage loans, including premiums	$ 50,700	51,339
Digital Realty Trust, L.P. | Mortgage Loans | 1100 Space Park Drive
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.89%
Maturity Date	Dec. 11, 2016
Mortgage loans, including premiums	$ 50,648	51,295
Digital Realty Trust, L.P. | Mortgage Loans | 600 West Seventh Street
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.80%
Maturity Date	Mar. 15, 2016
Mortgage loans, including premiums	$ 46,466	47,825
Digital Realty Trust, L.P. | Mortgage Loans | 150 South First Street
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	6.30%
Maturity Date	Feb. 6, 2017
Mortgage loans, including premiums	$ 48,699	49,316
Digital Realty Trust, L.P. | Mortgage Loans | 2334 Lundy Place
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	5.96%
Maturity Date	Nov. 11, 2016
Mortgage loans, including premiums	$ 36,875	37,340
Digital Realty Trust, L.P. | Mortgage Loans | 8025 North Interstate 35
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	4.09%
Maturity Date	Mar. 6, 2016
Mortgage loans, including premiums	$ 5,857	6,057
Digital Realty Trust, L.P. | Mortgage Loans | 731 East Trade Street
Debt Instrument [Line Items]
Interest Rate at September 30, 2015	8.22%
Maturity Date	Jul. 1, 2020
Mortgage loans, including premiums	$ 3,539	$ 3,836

Debt of the Operating Partner51

Debt of the Operating Partnership (Outstanding Indebtedness - Global Revolving Credit Facility) (Details) $ in Thousands	Sep. 30, 2015USD ($)$ / ¥$ / CAD$ / £$ / HKD$ / SGD$ / €$ / AUD	Dec. 31, 2014USD ($)$ / ¥$ / CAD$ / £$ / HKD$ / SGD$ / €$ / AUD
SGD
Debt Instrument [Line Items]
Exchange rate | $ / SGD	0.70	0.75
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 688,957	$ 525,951
Digital Realty Trust, L.P. | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £	1.51	1.56
Digital Realty Trust, L.P. | EUR
Debt Instrument [Line Items]
Exchange rate | $ / €	1.12	1.21
Digital Realty Trust, L.P. | AUD
Debt Instrument [Line Items]
Exchange rate | $ / AUD	0.70	0.82
Digital Realty Trust, L.P. | Global revolving credit facility
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 688,957	$ 525,951
Weighted-average interest rate	1.65%	1.87%
Digital Realty Trust, L.P. | Global revolving credit facility | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 683,957	$ 514,951
Weighted-average interest rate	1.63%	1.84%
Digital Realty Trust, L.P. | Global revolving credit facility | USD | Base Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 5,000	$ 11,000
Weighted-average interest rate	3.35%	3.35%
Digital Realty Trust, L.P. | Global revolving credit facility | USD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 50,000	$ 90,000
Weighted-average interest rate	1.29%	1.27%
Digital Realty Trust, L.P. | Global revolving credit facility | GBP
Debt Instrument [Line Items]
Exchange rate | $ / £	1.51	1.56
Digital Realty Trust, L.P. | Global revolving credit facility | GBP | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 110,434	$ 132,716
Weighted-average interest rate	1.62%	1.61%
Digital Realty Trust, L.P. | Global revolving credit facility | EUR
Debt Instrument [Line Items]
Exchange rate | $ / €	1.12	1.21
Digital Realty Trust, L.P. | Global revolving credit facility | EUR | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 214,822	$ 58,071
Weighted-average interest rate	1.00%	1.13%
Digital Realty Trust, L.P. | Global revolving credit facility | AUD
Debt Instrument [Line Items]
Exchange rate | $ / AUD	0.70	0.82
Digital Realty Trust, L.P. | Global revolving credit facility | AUD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 88,497	$ 72,676
Weighted-average interest rate	3.15%	3.74%
Digital Realty Trust, L.P. | Global revolving credit facility | HKD
Debt Instrument [Line Items]
Exchange rate | $ / HKD	0.13	0.13
Digital Realty Trust, L.P. | Global revolving credit facility | HKD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 88,476	$ 79,336
Weighted-average interest rate	1.36%	1.34%
Digital Realty Trust, L.P. | Global revolving credit facility | JPY
Debt Instrument [Line Items]
Exchange rate | $ / ¥	0.01	0.01
Digital Realty Trust, L.P. | Global revolving credit facility | JPY | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 14,265	$ 13,201
Weighted-average interest rate	1.13%	1.17%
Digital Realty Trust, L.P. | Global revolving credit facility | SGD
Debt Instrument [Line Items]
Exchange rate | $ / SGD	0.70	0.75
Digital Realty Trust, L.P. | Global revolving credit facility | SGD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 46,475	$ 6,565
Weighted-average interest rate	2.42%	1.64%
Digital Realty Trust, L.P. | Global revolving credit facility | CAD
Debt Instrument [Line Items]
Exchange rate | $ / CAD	0.75	0.86
Digital Realty Trust, L.P. | Global revolving credit facility | CAD | Floating Rate
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 70,988	$ 62,386
Weighted-average interest rate	1.86%	2.39%

Debt of the Operating Partner52

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

Debt of the Operating Partner53

Debt of the Operating Partnership (Global Revolving Credit Facility) (Narrative) (Details)	9 Months Ended
	Sep. 30, 2015USD ($)extension	Dec. 31, 2014USD ($)	Aug. 15, 2013USD ($)	Aug. 14, 2013USD ($)
Unsecured term loan
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 938,276,000	$ 976,600,000
Unsecured term loan | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1,000,000,000	$ 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 September 30, 2015	$ 938,276,000	976,600,000
Global revolving credit facility
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 688,957,000	525,951,000
Global revolving credit facility | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			2,000,000,000	$ 1,800,000,000
Maturity Date	Nov. 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 September 30, 2015	688,957,000	$ 525,951,000
Letter of credit security amount	$ 5,500,000
Global revolving credit facility | Digital Realty Trust, L.P. | Prime Rate
Debt Instrument [Line Items]
Interest rate basis spread	0.10%
Accordian Feature | Unsecured term loan | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			1,100,000,000
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	9 Months Ended
	Sep. 30, 2015USD ($)extension	Dec. 31, 2014USD ($)	Aug. 15, 2013USD ($)	Aug. 14, 2013USD ($)
Debt Instrument [Line Items]
Balance as of September 30, 2015	$ 938,276,000	$ 976,600,000
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1,000,000,000	$ 750,000,000
Maturity Date	Apr. 16, 2017
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Balance as of September 30, 2015	$ 938,276,000	$ 976,600,000
Capitalized financing costs	$ 8,400,000
Accordian Feature | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1,100,000,000

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

Debt of the Operating Partner57

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

Debt of the Operating Partner58

Debt of the Operating Partnership (Schedule Of Debt Maturities And Principal Maturities) (Details) - Digital Realty Trust, L.P. $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)extension	Dec. 31, 2014USD ($)
Debt Instrument [Line Items]
Remainder of 2015	$ 1,768
2,016	216,979
2,017	1,785,628
2,018	593
2,019	644
Thereafter	2,760,093
Subtotal	4,765,705
Unamortized discounts	(17,601)
Unamortized net premiums	475
Total Indebtedness	4,748,579	$ 4,673,127
Global revolving credit facility
Debt Instrument [Line Items]
Remainder of 2015	0
2,016	0
2,017	688,957
2,018	0
2,019	0
Thereafter	0
Subtotal	688,957
Unamortized discounts	0
Unamortized net premiums	0
Total Indebtedness	$ 688,957
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Unsecured term loan
Debt Instrument [Line Items]
Remainder of 2015	$ 0
2,016	0
2,017	938,276
2,018	0
2,019	0
Thereafter	0
Subtotal	938,276
Unamortized discounts	0
Unamortized net premiums	0
Total Indebtedness	$ 938,276
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Prudential Shelf Facility:
Debt Instrument [Line Items]
Remainder of 2015	$ 0
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	2,758,960
Subtotal	2,758,960
Unamortized discounts	(17,601)	(15,632)
Unamortized net premiums	0
Total Indebtedness	2,741,359
Mortgage Loans
Debt Instrument [Line Items]
Remainder of 2015	1,768
2,016	191,979
2,017	108,395
2,018	593
2,019	644
Thereafter	1,133
Subtotal	304,512
Unamortized discounts	0
Unamortized net premiums	475	582
Total Indebtedness	$ 304,987	$ 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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 38,522	$ 109,314	$ 257,305	$ 185,010
Weighted average shares/units outstanding-basic (shares)	135,832,503	135,492,618	135,782,831	132,635,894
Stock options (shares)	19,983	52,629	20,629	46,649
Unvested incentive units (shares)	86,190	129,024	65,752	61,122
Series I Cumulative Redeemable Preferred Stock (shares)	1,703,182	0	567,727	0
2014 market performance-based awards (shares)	618,078	272,262	483,538	109,301
Weighted average shares/units outstanding-diluted (shares)	138,259,936	135,946,533	136,920,477	132,852,966
Basic ($ per share/unit)	$ 0.28	$ 0.81	$ 1.89	$ 1.39
Diluted ($ per share/unit)	$ 0.28	$ 0.80	$ 1.88	$ 1.39

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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	30,365,091	20,443,722	29,947,931	22,322,087
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	2,635,444	2,815,512	2,698,215	2,745,730
Potentially dilutive 2029 Debentures
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	0	0	0	2,617,790
Series E Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	4,567,661	4,673,322	4,440,429	5,136,112
Series F Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	2,896,800	2,963,810	2,816,110	3,257,310
Series G Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	3,960,900	4,052,525	3,850,569	4,453,839
Series H Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	5,804,286	5,938,553	5,642,608	4,111,306
Shares subject to Forward Equity Offering
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	10,500,000	0	10,500,000	0

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

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

Income Taxes (Details)

Income Taxes (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015USD ($)
Income Tax Disclosure [Abstract]
Income distributed	100.00%
Net deferred tax liability	$ 135.4

Equity And Accumulated Other 64

Equity And Accumulated Other Comprehensive Income, Net (Equity Distribution Agreements) (Narrative) (Details)	Oct. 13, 2015shares	Oct. 08, 2015USD ($)shares	Aug. 24, 2015USD ($)$ / sharesshares	Jul. 20, 2015shares	Dec. 31, 2015$ / shares	Sep. 30, 2015USD ($)$ / sharesshares	Sep. 30, 2014USD ($)	Dec. 31, 2014USD ($)$ / shares	Jun. 30, 2011USD ($)
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Gross proceeds from the issuance of preferred stock						$ 250,000,000	$ 365,000,000
Minimum period without dividends to acquire voting rights					18 months
Subsequent Event
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from common stock issuance		$ 674,100,000
Common Stock
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issued (shares) | shares				10,500,000
Common Stock | Subsequent Event
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of shares issued in settlement | shares		10,500,000
Series I Preferred Stock
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issued (shares) | shares			10,000,000
Preferred Stock, dividend rate			6.35%			6.35%
Gross proceeds from the issuance of preferred stock			$ 241,700,000
Dividends ($ per share) | $ / shares			$ 1.5875
Preferred Stock, liquidation preference per share/unit | $ / shares			$ 25			$ 25		$ 0
Conversion ratio					0.76231
Series I Preferred Stock | Scenario, Forecast
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividends ($ per share) | $ / shares					$ 0.56003
2011 Equity Distribution Agreements
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Aggregate offering price of the distribution agreement maximum									$ 400,000,000
Net proceeds from sale of common stock						$ 342,700,000
Issuance of common shares (shares) | shares						5,700,000
Equity distribution agreements at an average price ($ per share) | $ / shares						$ 60.35
Payment of commissions to sales agents						$ 3,500,000
Aggregate offering price remaining available for offer and sale						53,800,000
Digital Realty Trust, L.P.
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Redemption value of OP units						$ 170,500,000		$ 179,000,000
Digital Realty Trust, L.P. | Series I Preferred Stock | Subsequent Event
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Issued (shares) | shares	10,000,000
Preferred Stock, dividend rate	6.35%

Equity And Accumulated Other 65

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

Equity And Accumulated Other 66

Equity And Accumulated Other Comprehensive Income, Net (Summary Of Activity For Noncontrolling Interests In The Operating Partnership) (Details)	9 Months Ended
	Sep. 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	(42,500)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock	(76,087)
Cancellation of incentive units held by employees and directors	(150,140)
Grant of incentive units to employees and directors	90,679
Ending balance	2,835,613
Common Units
Common and Incentive Unit Activity [Roll Forward]
Beginning balance	1,463,814
Redemption of common units for shares of Digital Realty Trust, Inc. common stock	(42,500)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock	0
Cancellation of incentive units held by employees and directors	0
Grant of incentive units to employees and directors	0
Ending balance	1,421,314
Incentive Units
Common and Incentive Unit Activity [Roll Forward]
Beginning balance	1,549,847
Redemption of common units for shares of Digital Realty Trust, Inc. common stock	0
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock	(76,087)
Cancellation of incentive units held by employees and directors	(150,140)
Grant of incentive units to employees and directors	90,679
Ending balance	1,414,299

Equity And Accumulated Other 67

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

Equity And Accumulated Other 68

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

Capital And Accumulated Other69

Capital And Accumulated Other Comprehensive Income (Partnership Units) (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Digital Realty Trust, L.P.
Capital and Accumulated Other Comprehensive Income (Loss) [Line Items]
Redemption value of common units	$ 170.5	$ 179

Capital And Accumulated Other70

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

Capital And Accumulated Other71

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

Incentive Plan (Narrative) (Det

Incentive Plan (Narrative) (Details) - USD ($) $ in Millions	May. 02, 2007	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares granted per employee	1,500,000
Maximum amount of cash paid per employee	$ 10
2004 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and reserved for issuance under the "Incentive Plan"		4,474,102
Amended And Restated 2004 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and reserved for issuance under the "Incentive Plan"	9,474,102
Increase in number of shares reserved for issuance	5,000,000
2014 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares remaining for issuance under the "Incentive Plan"		4,775,319

Incentive Plan (Long-Term Incen

Incentive Plan (Long-Term Incentive Units) (Narrative) (Details) - Long-Term Incentive Units - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years
Share/unit compensation expense	$ 1.5	$ 1.5	$ 4.6	$ 5.2
Capitalized expense related to construction and leasing activities	0	$ 0.3	1.1	$ 1.1
Unearned compensation	$ 8.7		$ 8.7		$ 9.3
Unearned compensation, period of recognition			851 days

Incentive Plan (Summary Of Long

Incentive Plan (Summary Of Long-Term Incentive Units) (Details) - Long-Term Incentive Units	9 Months Ended
	Sep. 30, 2015$ / sharesshares
Long-Term Incentive Unit Activity [Roll Forward]
Unvested Shares, beginning of period, Shares	314,415
Unvested Shares, Granted, Shares	90,679
Unvested Shares, Vested, Shares	(157,300)
Unvested Shares, Cancelled or expired, Shares	(22,496)
Unvested Shares, end of period, Shares	225,298
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	$ 59.34
Unvested Shares, Granted, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	64.79
Unvested Shares, Vested, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	60.25
Unvested Shares, Cancelled or expired, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	58.13
Unvested Shares, beginning of period, Weighted-Average Grant Date Fair Value ($ per share) | $ / shares	$ 61.03

Incentive Plan (Performance Bas

Incentive Plan (Performance Based Awards) (Narrative) (Details) simulation in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)simulationshares	Sep. 30, 2014USD ($)	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	$ 18.9		$ 18.9		$ 9.5
Recognized compensation expense	2.1	$ 0.8	5.4	$ 2.2
Capitalized expense related to construction and leasing activities	$ 2.5	$ 0.4	$ 3.6	$ 1
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)	9 Months Ended
	Sep. 30, 2015
2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage	0.00%
RMS Relative Market Performance	0.00%
2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance	(3.00%)
Threshold Level | 2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage	25.00%
RMS Relative Market Performance	0.00%
Threshold Level | 2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance	(3.00%)
Target Level | 2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage	50.00%
RMS Relative Market Performance	3.25%
Target Level | 2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance	1.00%
High Level | 2014 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage	100.00%
RMS Relative Market Performance	6.50%
High Level | 2015 Performance Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance	5.00%

Incentive Plan (Summary Of Ince

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

Incentive Plan (Summary Of Stoc

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

Incentive Plan (Restricted Stoc

Incentive Plan (Restricted Stock) (Narrative) (Details) - Restricted Stock - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock expense	$ 0.7	$ 0.4	$ 1.8	$ 1.9
Capitalized expense related to construction and leasing activities	0.6	$ 0.4	2.1	$ 2
Unearned compensation	$ 11.9		$ 11.9		$ 10.4
Unearned compensation, period of recognition			966 days
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years

Incentive Plan (Summary Of Rest

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

Derivative Instruments (Details

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

Fair Value Of Instruments (Esti

Fair Value Of Instruments (Estimated Fair Value And Carrying Amounts) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 23, 2015	Dec. 31, 2014
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	$ 2,963,204		$ 2,968,073
Mortgage Loans	319,222		399,569
Long-term Debt, Fair Value	4,909,659		4,870,193
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	2,816,359		2,791,758
Mortgage Loans	304,987		378,818
Long-term Debt, Fair Value	4,748,579		4,673,127
Global revolving credit facility | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	688,957		525,951
Global revolving credit facility | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	688,957		525,951
Unsecured term loan | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	938,276		976,600
Unsecured term loan | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	938,276		976,600
Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 17,601		$ 15,632
3.625% notes due 2022 | Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	3.625%
3.95% notes due 2022 | Senior Notes:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	3.95%	3.95%

Commitments and Contingencies (

Commitments and Contingencies (Details) £ in Millions, SGD in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2015SGD	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2015SGD	Sep. 30, 2015GBP (£)	Sep. 30, 2014USD ($)	Sep. 30, 2014GBP (£)	Dec. 31, 2014USD ($)	Jul. 11, 2012USD ($)	Jul. 11, 2012GBP (£)
Commitments and Contingencies [Line Items]
Accounts payable and other accrued liabilities	$ 513,555,000				$ 513,555,000					$ 605,923,000
Reduction in fair value | £							£ 30.3
Change in fair value of contingent consideration	1,594,000			$ 1,465,000	44,276,000			$ 4,102,000
Commitments related to construction contracts	135,600,000				135,600,000
Sentrum Portfolio
Commitments and Contingencies [Line Items]
Additional performance based consideration earned (maximum)					1,100,000		£ 0.7	10,300,000	£ 6.2
Contingent liability											$ 87,600,000	£ 56.5
Change in fair value of contingent consideration	0			$ (1,500,000)	43,000,000			$ (4,100,000)
29 A International Business Park
Commitments and Contingencies [Line Items]
Accounts payable and other accrued liabilities	18,900,000				18,900,000					$ 12,400,000
Earnout payments		$ 13,000,000	SGD 17.5
Additional performance based consideration earned (maximum)					35,200,000	SGD 50
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 ($)	Oct. 13, 2015	Oct. 09, 2015	Oct. 08, 2015	Aug. 24, 2015	Jul. 20, 2015	Sep. 30, 2015	Oct. 05, 2015	Oct. 01, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Payments to acquire business						$ 46,600,000
Preferred Stock, par value						$ 0.01			$ 0.01
Series I Preferred Stock
Subsequent Event [Line Items]
Issued (shares)				10,000,000
Preferred Stock, dividend rate				6.35%		6.35%
Preferred Stock, liquidation preference per share/unit				$ 25		$ 25			$ 0
Common Stock
Subsequent Event [Line Items]
Issued (shares)					10,500,000
Senior Notes: | 3.400% Notes Due 2020
Subsequent Event [Line Items]
Stated interest rate						3.40%
Senior Notes: | 4.750% Notes Due 2025
Subsequent Event [Line Items]
Stated interest rate						4.75%
Telx | Series I Preferred Stock
Subsequent Event [Line Items]
Issued (shares)				10,000,000
Preferred Stock, dividend rate				6.35%
Preferred Stock, par value				$ 0.01
Preferred Stock, liquidation preference per share/unit				$ 25
Subsequent Event
Subsequent Event [Line Items]
Proceeds from common stock issuance			$ 674,100,000
Subsequent Event | Senior Notes: | 3.400% Notes Due 2020
Subsequent Event [Line Items]
Face amount							$ 500,000,000
Stated interest rate							3.40%
Subsequent Event | Senior Notes: | 4.750% Notes Due 2025
Subsequent Event [Line Items]
Face amount							$ 450,000,000
Stated interest rate							4.75%
Subsequent Event | Telx
Subsequent Event [Line Items]
Payments to acquire business		$ 1,886,000,000
Proceeds from common stock issuance			$ 674,100,000
Subsequent Event | Telx | Common Stock
Subsequent Event [Line Items]
Issued (shares)			10,500,000
Subsequent Event | Telx | Senior Notes: | 3.400% Notes Due 2020
Subsequent Event [Line Items]
Face amount								$ 500,000,000
Stated interest rate								3.40%
Subsequent Event | Telx | Senior Notes: | 4.750% Notes Due 2025
Subsequent Event [Line Items]
Face amount								$ 450,000,000
Stated interest rate								4.75%
Digital Realty Trust, L.P. | Subsequent Event | Series I Preferred Stock
Subsequent Event [Line Items]
Issued (shares)	10,000,000
Preferred Stock, dividend rate	6.35%