Digital Realty Trust (DLR) 10-K 2 Mar 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2019	Feb. 26, 2020	Jun. 28, 2019
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	001-32336
Entity Registrant Name	DIGITAL REALTY TRUST, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	26-0081711
Entity Address, Address Line One	Four Embarcadero Center, Suite 3200
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94111
City Area Code	415
Local Phone Number	738-6500
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
Entity Shell Company	false
Entity Public Float			$ 25
Entity Common Stock, Shares Outstanding		209,039,061
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Central Index Key	0001297996
Current Fiscal Year End Date	--12-31
Digital Realty Trust, L.P.
Entity Information [Line Items]
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Entity File Number	000-54023
Entity Registrant Name	DIGITAL REALTY TRUST, L.P.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	20-2402955
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
Entity Shell Company	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0001494877
Current Fiscal Year End Date	--12-31
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock
Trading Symbol	DLR
Security Exchange Name	NYSE
Series C Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Series C Cumulative Redeemable PerpetualPreferred Stock
Trading Symbol	DLR Pr C
Security Exchange Name	NYSE
Potentially dilutive Series G Cumulative Redeemable Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Series G Cumulative Redeemable Preferred
Trading Symbol	DLR Pr G
Security Exchange Name	NYSE
Potentially dilutive Series I Cumulative Redeemable Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Series I Cumulative Redeemable PreferredStock
Trading Symbol	DLR Pr I
Security Exchange Name	NYSE
Series J Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Series J Cumulative Redeemable PreferredStock
Trading Symbol	DLR Pr J
Security Exchange Name	NYSE
Potentially dilutive Series K Cumulative Redeemable Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Series K Cumulative Redeemable PreferredStock
Trading Symbol	DLR Pr K
Security Exchange Name	NYSE
Series L Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Series L Cumulative Redeemable PreferredStock
Trading Symbol	DLR Pr L
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Properties:
Land	$ 804,830	$ 859,113
Acquired ground leases	10,725	10,575
Buildings and improvements	15,449,884	15,610,992
Tenant improvements	621,153	574,336
Total investments in operating properties	16,886,592	17,055,016
Accumulated depreciation and amortization	(4,536,169)	(3,935,267)
Net investments in operating properties	12,350,423	13,119,749
Construction in progress and space held for development	1,732,555	1,621,928
Land held for future development	147,597	162,941
Net investments in properties	14,230,575	14,904,618
Investments in unconsolidated joint ventures	1,287,109	175,108
Net investments in real estate	15,517,684	15,079,726
Operating lease right-of-use assets, net	628,681
Cash and cash equivalents	89,817	126,700
Accounts and other receivables, net	305,501	299,621
Deferred rent	478,744	463,248
Acquired above-market leases, net	74,815	119,759
Goodwill	3,363,070	4,348,007
Acquired in-place lease value, deferred leasing costs and intangibles, net	2,195,324	3,144,395
Assets held for sale	229,934
Other assets	184,561	185,239
Total assets	23,068,131	23,766,695
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	8,973,190	7,589,126
Secured debt, including premiums	104,934	685,714
Operating lease liabilities	693,539
Accounts payable and other accrued liabilities	1,007,761	1,164,509
Accrued dividends and distributions	234,620	217,241
Acquired below-market leases, net	148,774	200,113
Security deposits and prepaid rents	208,724	209,311
Obligations associated with assets held for sale	2,700
Total liabilities	12,418,566	12,892,653
Redeemable noncontrolling interests	41,465	15,832
Commitments and contingencies
Stockholders' Equity:
Preferred stock/units	1,434,420	1,249,560
Common Stock: $0.01 par value per share, 315,000,000 shares authorized, 208,900,758 and 206,425,656 shares issued and outstanding as of December 31, 2019 and December 31, 2018, respectively	2,073	2,051
Partners' capital:
Additional paid-in capital	11,577,320	11,355,751
Accumulated dividends in excess of earnings	(3,046,579)	(2,633,071)
Accumulated other comprehensive loss, net	(87,922)	(115,647)
Total stockholders' equity	9,879,312	9,858,644
Noncontrolling Interests:
Noncontrolling interests in operating partnership	708,163	906,510
Noncontrolling interests in consolidated joint ventures	20,625	93,056
Total noncontrolling interests	728,788	999,566
Total equity	10,608,100	10,858,210
Total liabilities and equity/capital	23,068,131	23,766,695
Digital Realty Trust, L.P.
Properties:
Land	804,830	859,113
Acquired ground leases	10,725	10,575
Buildings and improvements	15,449,884	15,610,992
Tenant improvements	621,153	574,336
Total investments in operating properties	16,886,592	17,055,016
Accumulated depreciation and amortization	(4,536,169)	(3,935,267)
Net investments in operating properties	12,350,423	13,119,749
Construction in progress and space held for development	1,732,555	1,621,928
Land held for future development	147,597	162,941
Net investments in properties	14,230,575	14,904,618
Investments in unconsolidated joint ventures	1,287,109	175,108
Net investments in real estate	15,517,684	15,079,726
Operating lease right-of-use assets, net	628,681
Cash and cash equivalents	89,817	126,700
Accounts and other receivables, net	305,501	299,621
Deferred rent	478,744	463,248
Acquired above-market leases, net	74,815	119,759
Goodwill	3,363,070	4,348,007
Acquired in-place lease value, deferred leasing costs and intangibles, net	2,195,324	3,144,395
Assets held for sale	229,934
Other assets	184,561	185,239
Total assets	23,068,131	23,766,695
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	8,973,190	7,589,126
Secured debt, including premiums	104,934	685,714
Operating lease liabilities	693,539
Accounts payable and other accrued liabilities	1,007,761	1,164,509
Accrued dividends and distributions	234,620	217,241
Acquired below-market leases, net	148,774	200,113
Security deposits and prepaid rents	208,724	209,311
Obligations associated with assets held for sale	2,700
Total liabilities	12,418,566	12,892,653
Redeemable noncontrolling interests	41,465	15,832
Commitments and contingencies
Stockholders' Equity:
Preferred stock/units	1,434,420	1,249,560
Partners' capital:
Common units, 208,900,758 and 206,425,656 units issued and outstanding as of December 31, 2019 and December 31, 2018, respectively	8,532,814	8,724,731
Limited Partners, 8,843,155 and 10,580,884 units issued and outstanding as of December 31, 2019 and December 31, 2018, respectively	711,650	911,256
Accumulated other comprehensive loss, net	(91,409)	(120,393)
Total partners' capital	10,587,475	10,765,154
Noncontrolling Interests:
Noncontrolling interests in consolidated joint ventures	20,625	93,056
Total capital	10,608,100	10,858,210
Total liabilities and equity/capital	23,068,131	23,766,695
Global revolving credit facilities, net
LIABILITIES AND EQUITY
Line of credit	234,105	1,647,735
Global revolving credit facilities, net | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	234,105	1,647,735
Unsecured term loans
LIABILITIES AND EQUITY
Line of credit	810,219	1,178,904
Unsecured term loans | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	$ 810,219	$ 1,178,904

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts	$ 13,753	$ 11,554
Accumulated amortization, deferred leasing costs and intangibles	1,629,117	1,355,013
Accumulated amortization, below market leases	$ 247,735	$ 242,422
Preferred stock, par value (in dollars per share/unit)	$ 0.01	$ 0.01
Preferred stock, authorized (shares)	110,000,000	110,000,000
Preferred stock, issued (shares)	58,250,000	50,650,000
Preferred stock, outstanding (shares)	58,250,000	50,650,000
Common stock, par value (in dollars per share/unit)	$ 0.01	$ 0.01
Common stock, authorized (shares)	315,000,000	315,000,000
Common stock, shares, issued (shares)	208,900,758	206,425,656
Common stock, shares, outstanding (shares)	208,900,758	206,425,656
Liquidation preference	$ 1,456,250
Preferred stock, liquidation preference per share (in dollars per share)	$ 25	$ 25
Acquired above-market leases
Accumulated amortization, above market leases	$ 204,233	$ 158,037
Digital Realty Trust, L.P.
Allowance for doubtful accounts	13,753	11,554
Accumulated amortization, deferred leasing costs and intangibles	1,629,117	1,355,013
Accumulated amortization, below market leases	$ 247,735	$ 242,422
Preferred stock, outstanding (shares)		50,650,000
Preferred units, issued (units)	58,250,000	50,650,000
Preferred units, outstanding (units)	58,250,000
Common units, issued (units)	208,900,758	206,425,656
Common units, outstanding (units)	208,900,758	206,425,656
Limited Partners' units, issued (units)	8,843,155	10,580,884
Limited Partners' units outstanding (units)	8,843,155	10,580,884
Digital Realty Trust, L.P. | Acquired above-market leases
Accumulated amortization, above market leases	$ 204,233	$ 158,037

CONSOLIDATED INCOME STATEMENTS

CONSOLIDATED INCOME STATEMENTS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Revenues:
Total operating revenues	$ 3,209,241	$ 3,046,478	$ 2,457,928
Operating Expenses:
Rental property operating and maintenance	1,020,578	957,065	759,616
Property taxes and insurance	172,183	140,918	134,995
Depreciation and amortization	1,163,774	1,186,896	842,464
General and administrative	211,097	163,667	161,441
Transactions and integration	27,925	45,327	76,048
Impairment of investments in real estate	5,351	0	28,992
Other	14,118	2,818	3,077
Total operating expenses	2,615,026	2,496,691	2,006,633
Operating income	594,215	549,787	451,295
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	8,067	32,979	25,516
Gain on deconsolidation, net	67,497		0
Gain on disposition of properties, net	267,651	80,049	40,354
Interest and other income, net	66,000	3,481	3,655
Interest expense	(353,057)	(321,529)	(258,642)
Tax expense	(11,995)	(2,084)	(7,901)
(Loss) gain from early extinguishment of debt	(39,157)	(1,568)	1,990
Net income	599,221	341,115	256,267
Net loss (income) attributable to noncontrolling interests	(19,460)	(9,869)	(8,008)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	579,761	331,246	248,259
Preferred stock dividends, including undeclared dividends	(74,990)	(81,316)	(68,802)
Issuance costs associated with redeemed preferred stock	(11,760)		(6,309)
Net income available to common stock/unitholders	$ 493,011	$ 249,930	$ 173,148
Net income per share/unit available to common stockholders/unitholders:
Basic (in dollars per share/unit)	$ 2.37	$ 1.21	$ 0.99
Diluted (in dollars per share/unit)	$ 2.35	$ 1.21	$ 0.99
Weighted average common shares/units outstanding:
Basic (shares/units)	208,325,823	206,035,408	174,059,386
Diluted (shares/units)	209,462,247	206,673,471	174,895,098
Digital Realty Trust, L.P.
Operating Revenues:
Total operating revenues	$ 3,209,241	$ 3,046,478	$ 2,457,928
Operating Expenses:
Rental property operating and maintenance	1,020,578	957,065	759,616
Property taxes and insurance	172,183	140,918	134,995
Depreciation and amortization	1,163,774	1,186,896	842,464
General and administrative	211,097	163,667	161,441
Transactions and integration	27,925	45,327	76,048
Impairment of investments in real estate	5,351	0	28,992
Other	14,118	2,818	3,077
Total operating expenses	2,615,026	2,496,691	2,006,633
Operating income	594,215	549,787	451,295
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	8,067	32,979	25,516
Gain on deconsolidation, net	67,497
Gain on disposition of properties, net	267,651	80,049	40,354
Interest and other income, net	66,000	3,481	3,655
Interest expense	(353,057)	(321,529)	(258,642)
Tax expense	(11,995)	(2,084)	(7,901)
(Loss) gain from early extinguishment of debt	(39,157)	(1,568)	1,990
Net income	599,221	341,115	256,267
Net loss (income) attributable to noncontrolling interests	1,640	311	(4,238)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	600,861	341,426	252,029
Preferred stock dividends, including undeclared dividends	(74,990)	(81,316)	(68,802)
Issuance costs associated with redeemed preferred stock	(11,760)	0	(6,309)
Net income available to common stock/unitholders	$ 514,111	$ 260,110	$ 176,918
Net income per share/unit available to common stockholders/unitholders:
Basic (in dollars per share/unit)	$ 2.37	$ 1.21	$ 0.99
Diluted (in dollars per share/unit)	$ 2.35	$ 1.21	$ 0.99
Weighted average common shares/units outstanding:
Basic (shares/units)	217,284,755	214,312,871	178,055,936
Diluted (shares/units)	218,421,179	214,950,934	178,891,648
Rental and other services
Operating Revenues:
Operating Revenues	$ 3,196,356	$ 2,412,076	$ 2,010,301
Rental and other services | Digital Realty Trust, L.P.
Operating Revenues:
Operating Revenues	3,196,356	2,412,076	2,010,301
Tenant reimbursements
Operating Revenues:
Operating Revenues	0	624,637	440,224
Tenant reimbursements | Digital Realty Trust, L.P.
Operating Revenues:
Operating Revenues		624,637	440,224
Fee income and other
Operating Revenues:
Operating Revenues	12,885	9,765	7,403
Fee income and other | Digital Realty Trust, L.P.
Operating Revenues:
Operating Revenues	$ 12,885	$ 9,765	$ 7,403

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 599,221	$ 341,115	$ 256,267
Other comprehensive income (loss):
Foreign currency translation adjustments	23,975	(11,736)	28,709
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
(Decrease) increase in fair value of interest rate swaps and foreign currency hedges	(9,232)	8,197	(3,434)
Reclassification to interest expense from interest rate swaps	(7,446)	(3,969)	2,459
Comprehensive income	628,205	333,607	284,001
Comprehensive loss (income) attributable to noncontrolling interests	(20,719)	(9,576)	(8,569)
Comprehensive income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	607,486	324,031	275,432
Digital Realty Trust, L.P.
Net income	599,221	341,115	256,267
Other comprehensive income (loss):
Foreign currency translation adjustments	23,975	(11,736)	28,709
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
(Decrease) increase in fair value of interest rate swaps and foreign currency hedges	(9,232)	8,197	(3,434)
Reclassification to interest expense from interest rate swaps	(7,446)	(3,969)	2,459
Comprehensive income	628,205	333,607	284,001
Comprehensive loss (income) attributable to noncontrolling interests	1,640	311	(4,238)
Comprehensive income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	$ 629,845	$ 333,918	$ 279,763

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	General PartnerPreferred UnitsDigital Realty Trust, L.P.Series C Preferred StockDFT Merger	General PartnerPreferred UnitsDigital Realty Trust, L.P.Series F Preferred Stock	General PartnerPreferred UnitsDigital Realty Trust, L.P.Potentially dilutive Series H Cumulative Redeemable Preferred Stock	General PartnerPreferred UnitsDigital Realty Trust, L.P.Series J Preferred Stock	General PartnerPreferred UnitsDigital Realty Trust, L.P.Potentially dilutive Series K Cumulative Redeemable Preferred Stock	General PartnerPreferred UnitsDigital Realty Trust, L.P.Series L Preferred Stock	General PartnerPreferred UnitsDigital Realty Trust, L.P.	General PartnerCommon UnitsDigital Realty Trust, L.P.Series F Preferred Stock	General PartnerCommon UnitsDigital Realty Trust, L.P.Potentially dilutive Series H Cumulative Redeemable Preferred Stock	General PartnerCommon UnitsDigital Realty Trust, L.P.DFT Merger	General PartnerCommon UnitsDigital Realty Trust, L.P.	Limited PartnersCommon UnitsDigital Realty Trust, L.P.DFT Merger	Limited PartnersCommon UnitsDigital Realty Trust, L.P.Ascenty	Limited PartnersCommon UnitsDigital Realty Trust, L.P.	Accumulated other comprehensive income (loss), netDigital Realty Trust, L.P.	Noncontrolling Interests in Consolidated Joint VenturesDigital Realty Trust, L.P.Ascenty	Noncontrolling Interests in Consolidated Joint VenturesDigital Realty Trust, L.P.	Redeemable Noncontrolling InterestsDigital Realty Trust, L.P.DFT Merger	Redeemable Noncontrolling InterestsDigital Realty Trust, L.P.	Digital Realty Trust, L.P.Total Stockholders' EquityDFT Merger	Digital Realty Trust, L.P.Series C Preferred StockDFT Merger	Digital Realty Trust, L.P.Series F Preferred Stock	Digital Realty Trust, L.P.Potentially dilutive Series H Cumulative Redeemable Preferred Stock	Digital Realty Trust, L.P.Series J Preferred Stock	Digital Realty Trust, L.P.Potentially dilutive Series K Cumulative Redeemable Preferred Stock	Digital Realty Trust, L.P.Series L Preferred Stock	Digital Realty Trust, L.P.Ascenty	Digital Realty Trust, L.P.	Redeemable Noncontrolling InterestsSeries F Preferred Stock	Redeemable Noncontrolling InterestsDFT Merger	Redeemable Noncontrolling Interests	Preferred StockSeries C Preferred StockDFT Merger	Preferred StockSeries F Preferred Stock	Preferred StockPotentially dilutive Series H Cumulative Redeemable Preferred Stock	Preferred StockSeries J Preferred Stock	Preferred StockPotentially dilutive Series K Cumulative Redeemable Preferred Stock	Preferred StockSeries L Preferred Stock	Preferred StockDFT Merger	Preferred Stock	Common StockDFT Merger	Common Stock	Additional Paid-in CapitalSeries F Preferred Stock	Additional Paid-in CapitalSeries J Preferred Stock	Additional Paid-in CapitalDFT Merger	Additional Paid-in Capital	Accumulated Dividends in Excess of EarningsSeries F Preferred Stock	Accumulated Dividends in Excess of EarningsPotentially dilutive Series H Cumulative Redeemable Preferred Stock	Accumulated Dividends in Excess of Earnings	Accumulated other comprehensive income (loss), netInterest Rate Swap	Accumulated other comprehensive income (loss), net	Total Stockholders' EquitySeries C Preferred StockDFT Merger	Total Stockholders' EquitySeries F Preferred Stock	Total Stockholders' EquityPotentially dilutive Series H Cumulative Redeemable Preferred Stock	Total Stockholders' EquitySeries J Preferred Stock	Total Stockholders' EquityPotentially dilutive Series K Cumulative Redeemable Preferred Stock	Total Stockholders' EquitySeries L Preferred Stock	Total Stockholders' EquityDFT Merger	Total Stockholders' EquityInterest Rate Swap	Total Stockholders' Equity	Noncontrolling Interests in Operating PartnershipSeries F Preferred Stock	Noncontrolling Interests in Operating PartnershipSeries J Preferred Stock	Noncontrolling Interests in Operating PartnershipDFT Merger	Noncontrolling Interests in Operating PartnershipAscenty	Noncontrolling Interests in Operating PartnershipInterest Rate Swap	Noncontrolling Interests in Operating Partnership	Noncontrolling Interests in Consolidated Joint VenturesAscenty	Noncontrolling Interests in Consolidated Joint Ventures	Total Noncontrolling InterestsSeries F Preferred Stock	Total Noncontrolling InterestsSeries J Preferred Stock	Total Noncontrolling InterestsDFT Merger	Total Noncontrolling InterestsAscenty	Total Noncontrolling InterestsInterest Rate Swap	Total Noncontrolling Interests	Series C Preferred StockDFT Merger	Series F Preferred Stock	Potentially dilutive Series H Cumulative Redeemable Preferred Stock	Series J Preferred Stock	Potentially dilutive Series K Cumulative Redeemable Preferred Stock	Series L Preferred Stock	DFT Merger	Ascenty	Interest Rate Swap	Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Number of units (units)							41,900,000				159,019,118			2,475,663
Beginning balance at Dec. 31, 2016																															$ 0								$ 1,012,961		$ 1,582				$ 5,764,497			$ (1,547,420)		$ (135,605)									$ 5,096,015						$ 29,684		$ 6,598						$ 36,282										$ 5,132,297
Beginning balance (shares) at Dec. 31, 2016																																									159,019,118
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of common units to common stock																																									$ 6				10,003														10,009						(10,009)								(10,009)										0
Conversion of common units to common stock (shares)																																									562,582
Issuance of unvested restricted stock, net of forfeitures (shares)																																									249,050
Issuance of common stock, net of offering costs																																						$ 219,250			$ 24				211,873														211,897																								$ 211,897
Issuance of common stock, net of offering costs (shares)				8,000,000																																					2,375,000																																										6,111,770
Shares issued under employee stock purchase plan											$ 5,143																	$ 5,143																	5,143														5,143																								$ 5,143
Shares issued under employee stock purchase plan (shares)											71,253																														71,253
Issuance of preferred stock, net of offering costs				$ 193,540																				$ 193,540								$ 219,250			$ 193,540																$ 219,250			$ 193,540																				$ 219,250			$ 193,540
Redemption of preferred stock		$ (176,191)						$ (6,309)														$ (182,500)											$ (176,191)													$ (6,309)						$ (182,500)																							$ (182,500)
Amortization of unearned compensation on share-based awards											$ 27,981																	27,981																	27,981														27,981																								27,981
Reclassification of vested share-based awards																																													(10,057)														(10,057)						10,057								10,057										12,357
Adjustment to redeemable noncontrolling interests											4,166			$ 8,191					$ (12,357)									12,357			(12,357)														4,166														4,166						8,191								8,191
Dividends declared on preferred stock																												(68,802)																				(68,802)											(68,802)																								(68,802)
Dividends and distributions on common stock and common and incentive units																																																(681,280)											(681,280)						(20,694)								(20,694)										(701,974)
Net income							$ 68,802				$ 179,457			$ 3,770			$ 4,238											256,267																				248,259											248,259						3,770		4,238						8,008										256,267
Other comprehensive income-foreign currency translation adjustments															$ 28,709													28,709																						28,272									28,272						437								437										28,709
Other comprehensive income- fair value of interest rate swaps/foreign currency hedges															(3,434)													(3,434)																					$ (3,513)									$ (3,513)						$ 79								$ 79										$ (3,434)	(3,434)
Other comprehensive income- reclassification of accumulated other comprehensive (income) loss to interest expense															2,459													2,459																						2,414									2,414						45								45										2,459
Common stock and units issued	$ 219,250																			$ 5,247,558	$ 219,250									$ 66,259										$ 432				$ 5,247,126													$ 5,247,558					$ 676,566								$ 676,566										$ 5,924,124
Common stock and units issued (shares)	8,050,000									43,175,629		6,111,770						66,259,000																						43,175,629
Exercise of stock options																																													729														729																								729
Exercise of stock options (shares)																																									17,668
Distributions from noncontrolling interests in consolidated joint ventures, net of contributions																																																																			(8,593)						(8,593)										(8,593)
Ending balance at Dec. 31, 2017																															53,902								1,249,560		$ 2,044				11,261,461			(2,055,552)		(108,432)									10,349,081						698,126		2,243						700,369										11,049,450
Ending balance (shares) at Dec. 31, 2017																																									205,470,300
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of limited partner common units to general partner common units (units)											562,582			562,582
Noncontrolling interests in operating partnership converted to shares of common stock											$ 10,009			$ (10,009)																																																																					10,009
Issuance of unvested restricted stock, net of forfeitures (units)											249,050
Issuance of common units, net of forfeitures (units)														464,244
Reclassification of vested share-based awards											$ (10,057)			$ 10,057
Partners' Capital Account, Distributions							$ (68,802)				$ (681,280)			$ (20,694)														(770,776)
Distributions From Noncontrolling Interests In Consolidated Joint Ventures Subsidiary																	(8,593)											(8,593)
Number of units (units)							50,650,000				205,470,300			8,489,095
Conversion of common units to common stock																																									$ 7				61,997														62,004						(62,004)								(62,004)										0
Conversion of common units to common stock (shares)																																									711,892
Issuance of unvested restricted stock, net of forfeitures (shares)																																									220,765
Common stock offering costs																																													(1,194)														(1,194)																								$ (1,194)
Issuance of common stock, net of offering costs																																						0
Issuance of common stock, net of offering costs (shares)																																																																																			2,338,874
Shares issued under employee stock purchase plan							$ 5,874				$ 5,874																														$ 1				5,873														5,874																								$ 5,874
Shares issued under employee stock purchase plan (shares)											69,532																														69,532
Amortization of unearned compensation on share-based awards											$ 32,456																	32,456																	32,456														32,456																								32,456
Reclassification of vested share-based awards																																											$ (3,772)											$ (3,772)							$ 3,772								$ 3,772
Adjustment to redeemable noncontrolling interests											1,596			$ 35,678					(37,274)									37,274	$ (37,274)													$ 1,596										$ 1,596								$ 35,678								$ 35,678							$ 37,274
Dividends declared on preferred stock																												(81,316)																				(81,316)											(81,316)																								(81,316)
Dividends and distributions on common stock and common and incentive units																															(1,271)																	(833,364)											(833,364)						(32,311)								(32,311)										(865,675)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions																	66,124											66,124																																							66,124						66,124										66,124
Net income							81,316				249,930			$ 9,705			(311)		475									340,640			475																	331,246											331,246						9,705		(311)						9,394										340,640
Other comprehensive income-foreign currency translation adjustments															(11,736)													(11,736)																						(11,279)									(11,279)						(457)								(457)										(11,736)
Other comprehensive income- fair value of interest rate swaps/foreign currency hedges															8,197													8,197																					7,890									7,890						307								307										8,197	8,197
Other comprehensive income- reclassification of accumulated other comprehensive (income) loss to interest expense															(3,969)													(3,969)																						(3,826)									(3,826)						(143)								(143)										(3,969)
Common stock and units issued													$ 253,837			$ 25,000				0							$ 278,837																														0						$ 253,837			$ 25,000					$ 278,837										$ 278,837
Common stock and units issued (shares)													2,338,874
Shares repurchased and retired to satisfy tax withholding upon vesting											$ (5,055)																	(5,055)													$ (1)				(5,054)														(5,055)																								(5,055)
Shares repurchased and retired to satisfy tax withholding upon vesting (shares)											(46,833)																														(46,833)
Ending balance at Dec. 31, 2018																															15,832								1,249,560		$ 2,051				11,355,751			(2,633,071)		(115,647)									9,858,644						$ 906,510		93,056						999,566										10,858,210
Ending balance (shares) at Dec. 31, 2018																																									206,425,656
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of limited partner common units to general partner common units (units)											711,892			711,892
Noncontrolling interests in operating partnership converted to shares of common stock											$ 62,004			$ (62,004)																																																																					62,004
Issuance of unvested restricted stock, net of forfeitures (units)											220,765
Reclassification of vested share-based awards											$ (3,772)			3,772
Partners' Capital Account, Distributions							$ (81,316)				(833,364)			$ (32,311)					(1,271)									(946,991)
Cumulative effect adjustment from adoption of new accounting standard											$ (5,915)																	(5,915)																				5,915											5,915																								$ 5,915
Number of units (units)							50,650,000				206,425,656			10,580,884																																																			217,006,540																		206,425,656
Conversion of common units to common stock																																									$ 22				190,492														190,514						$ (190,514)								(190,514)										$ 0
Conversion of common units to common stock (shares)																																									2,154,460
Issuance of unvested restricted stock, net of forfeitures (shares)																																									256,868
Common stock offering costs																																													(2,530)														(2,530)																								(2,530)
Issuance of common stock, net of offering costs																																						$ 0
Issuance of common stock, net of offering costs (shares)					8,400,000	13,800,000
Shares issued under employee stock purchase plan											$ 5,462																	5,462																	5,462														5,462																								5,462
Shares issued under employee stock purchase plan (shares)											63,774																														63,774
Issuance of preferred stock, net of offering costs					$ 203,264	$ 334,886																			$ 203,264	$ 334,886										$ 203,264	$ 334,886																		$ 203,264	$ 334,886																						$ 203,264	$ 334,886
Redemption of preferred stock			$ (353,290)						$ (11,760)														$ (365,050)											$ (353,290)													$ (11,760)						$ (365,050)																							$ (365,050)
Amortization of unearned compensation on share-based awards											$ 38,662																	38,662																	38,662														38,662																								38,662
Reclassification of vested share-based awards																																													(8,458)														(8,458)						8,458								8,458										0
Adjustment to redeemable noncontrolling interests											(2,059)						(23,878)		25,937									(25,937)			25,937														(2,059)														(2,059)								(23,878)						(23,878)										(25,937)
Dividends declared on preferred stock																												(74,990)																				(74,990)											(74,990)																								(74,990)
Dividends and distributions on common stock and common and incentive units																															(676)																	(900,201)											(900,201)						(38,278)								(38,278)										(938,479)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions																	63,173											63,173																																							63,173						63,173										63,173
Deconsolidation of consolidated joint venture																	(110,086)											(110,086)																																							(110,086)						(110,086)										(110,086)
Net income							$ 74,990				$ 504,771			$ 20,728			$ (1,640)		372									598,849			372																	579,761											579,761						20,728		(1,640)						19,088										598,849
Other comprehensive income-foreign currency translation adjustments															45,662													45,662																						43,702									43,702						1,960								1,960										45,662
Other comprehensive income- fair value of interest rate swaps/foreign currency hedges															(9,232)													(9,232)																					$ (8,839)									$ (8,839)						$ (393)								$ (393)										$ (9,232)	(9,232)
Other comprehensive income- reclassification of accumulated other comprehensive (income) loss to interest expense															$ (7,446)													(7,446)																						(7,138)									(7,138)						(308)								(308)										(7,446)
Common stock and units issued																				$ 0																																					$ 0
Ending balance at Dec. 31, 2019																															$ 41,465								$ 1,434,420		$ 2,073				$ 11,577,320			(3,046,579)		$ (87,922)									9,879,312						$ 708,163		$ 20,625						$ 728,788										10,608,100
Ending balance (shares) at Dec. 31, 2019																																									208,900,758
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of limited partner common units to general partner common units (units)											2,154,460			2,154,460
Noncontrolling interests in operating partnership converted to shares of common stock											$ 190,514			$ (190,514)																																																																					190,514
Issuance of unvested restricted stock, net of forfeitures (units)											256,868			416,731
Reclassification of vested share-based awards											$ (8,458)			$ 8,458
Partners' Capital Account, Distributions							$ (74,990)				(900,201)			$ (38,278)					$ (676)									(1,013,469)
Cumulative effect adjustment from adoption of new accounting standard											$ (6,318)																	$ (6,318)																				$ (6,318)											$ (6,318)																								$ (6,318)
Number of units (units)							58,250,000				208,900,758			8,843,155																																																			217,743,913																		208,900,758

CONSOLIDATED STATEMENTS OF CAPI

CONSOLIDATED STATEMENTS OF CAPITAL - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (units)		206,425,656			206,425,656
Conversion of limited partner common units to general partner common units					$ 190,514,000	$ 62,004,000	$ 10,009,000
Units issued in connection with employee stock purchase plan					5,462,000	5,874,000	$ 5,143,000
Units repurchased and retired to satisfy tax withholding upon vesting						$ (5,055,000)
Issuance of preferred units, net of offering costs (units)						2,338,874	6,111,770
Amortization of unearned compensation on share-based awards					38,662,000	$ 32,456,000	$ 27,981,000
Adjustment to redeemable noncontrolling interests					(25,937,000)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions					63,173,000	66,124,000
Cumulative effect adjustment from adoption of new accounting standard	$ (6,318,000)		$ 5,915,000		(6,318,000)	5,915,000
Deconsolidation of consolidated joint venture					(110,086,000)
Net income	$ 349,326,000	$ 120,997,000	$ 52,597,000	$ 110,095,000	599,221,000	341,115,000	256,267,000
Net income					598,849,000	340,640,000	256,267,000
Other comprehensive income-foreign currency translation adjustments					45,662,000	(11,736,000)	28,709,000
Other comprehensive income- fair value of interest rate swaps/foreign currency hedges					$ (9,232,000)	$ 8,197,000	(3,434,000)
Ending balance (units)	208,900,758		206,425,656		208,900,758	206,425,656
Interest Rate Swap
Increase (Decrease) in Partners' Capital [Roll Forward]
Other comprehensive income- fair value of interest rate swaps/foreign currency hedges					$ (9,232,000)	$ 8,197,000	(3,434,000)
DFT Merger
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations							5,924,124,000
Ascenty
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations						278,837,000
Series C Preferred Stock | DFT Merger
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs							219,250,000
Series F Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of preferred units							(182,500,000)
Adjustment to redeemable noncontrolling interests						37,274,000
Potentially dilutive Series H Cumulative Redeemable Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of preferred units					(365,050,000)
Series J Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs							193,540,000
Potentially dilutive Series K Cumulative Redeemable Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs					203,264,000
Series L Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs					334,886,000
Noncontrolling Interests in Consolidated Joint Ventures
Increase (Decrease) in Partners' Capital [Roll Forward]
Adjustment to redeemable noncontrolling interests					(23,878,000)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions					63,173,000	66,124,000
Deconsolidation of consolidated joint venture					(110,086,000)
Net income					(1,640,000)	(311,000)	4,238,000
Noncontrolling Interests in Consolidated Joint Ventures | Ascenty
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations						25,000,000
Digital Realty Trust, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance		10,858,210,000		11,049,450,000	10,858,210,000	11,049,450,000	5,132,297,000
Common unit offering costs					2,530,000	1,194,000	$ 211,897,000
Issuance of common units in connection with the exercise of stock options							729,000
Units issued in connection with employee stock purchase plan					5,462,000		$ 5,143,000
Units repurchased and retired to satisfy tax withholding upon vesting						(5,055,000)
Amortization of unearned compensation on share-based awards					38,662,000	32,456,000	27,981,000
Adjustment to redeemable noncontrolling interests					(25,937,000)	37,274,000	12,357,000
Distributions					(1,013,469,000)	(946,991,000)	(770,776,000)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions					63,173,000	66,124,000
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions							(8,593,000)
Cumulative effect adjustment from adoption of new accounting standard	$ (6,318,000)		$ (5,915,000)		(6,318,000)	(5,915,000)
Deconsolidation of consolidated joint venture					(110,086,000)
Net income	349,326,000	120,997,000	52,597,000	110,095,000	599,221,000	341,115,000	256,267,000
Net income					598,849,000	340,640,000	256,267,000
Other comprehensive income-foreign currency translation adjustments					45,662,000	(11,736,000)	28,709,000
Other comprehensive income- fair value of interest rate swaps/foreign currency hedges					(9,232,000)	8,197,000	(3,434,000)
Ending balance	10,608,100,000		10,858,210,000		10,608,100,000	10,858,210,000	11,049,450,000
Digital Realty Trust, L.P. | DFT Merger
Increase (Decrease) in Partners' Capital [Roll Forward]
Common unit offering costs							5,924,124,000
Digital Realty Trust, L.P. | Ascenty
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations						278,837,000
Digital Realty Trust, L.P. | Series C Preferred Stock | DFT Merger
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations							219,250,000
Digital Realty Trust, L.P. | Series F Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of preferred units							(182,500,000)
Digital Realty Trust, L.P. | Potentially dilutive Series H Cumulative Redeemable Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of preferred units					(365,050,000)
Digital Realty Trust, L.P. | Series J Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs							193,540,000
Digital Realty Trust, L.P. | Potentially dilutive Series K Cumulative Redeemable Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs					203,264,000
Digital Realty Trust, L.P. | Series L Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs					334,886,000
Accumulated other comprehensive income (loss), net | Digital Realty Trust, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance		(120,393,000)		(112,885,000)	(120,393,000)	(112,885,000)	(140,619,000)
Other comprehensive income-foreign currency translation adjustments					45,662,000	(11,736,000)	28,709,000
Other comprehensive income- fair value of interest rate swaps/foreign currency hedges					(9,232,000)	8,197,000	(3,434,000)
Ending balance	(91,409,000)		(120,393,000)		(91,409,000)	(120,393,000)	(112,885,000)
Noncontrolling Interests in Consolidated Joint Ventures | Digital Realty Trust, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance		93,056,000		2,243,000	93,056,000	2,243,000	6,598,000
Adjustment to redeemable noncontrolling interests					(23,878,000)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions					63,173,000	66,124,000
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions							(8,593,000)
Deconsolidation of consolidated joint venture					(110,086,000)
Net income					(1,640,000)	(311,000)	4,238,000
Ending balance	20,625,000		93,056,000		20,625,000	93,056,000	2,243,000
Noncontrolling Interests in Consolidated Joint Ventures | Digital Realty Trust, L.P. | Ascenty
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations						25,000,000
Redeemable Noncontrolling Interests | Digital Realty Trust, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance		15,832,000		53,902,000	15,832,000	53,902,000	0
Adjustment to redeemable noncontrolling interests					25,937,000	(37,274,000)	(12,357,000)
Distributions					(676,000)	(1,271,000)
Net income					372,000	475,000
Ending balance	41,465,000		15,832,000		41,465,000	15,832,000	$ 53,902,000
Redeemable Noncontrolling Interests | Digital Realty Trust, L.P. | DFT Merger
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations (in units)							66,259,000
General Partner | Preferred Units | Digital Realty Trust, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance		$ 1,249,560,000		$ 1,249,560,000	$ 1,249,560,000	$ 1,249,560,000	$ 1,012,961,000
Beginning balance (units)		50,650,000		50,650,000	50,650,000	50,650,000	41,900,000
Units issued in connection with employee stock purchase plan						$ 5,874,000
Distributions					$ (74,990,000)	(81,316,000)	$ (68,802,000)
Net income					74,990,000	81,316,000	68,802,000
Ending balance	$ 1,434,420,000		$ 1,249,560,000		$ 1,434,420,000	$ 1,249,560,000	$ 1,249,560,000
Ending balance (units)	58,250,000		50,650,000		58,250,000	50,650,000	50,650,000
General Partner | Preferred Units | Digital Realty Trust, L.P. | Series C Preferred Stock | DFT Merger
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations							$ 219,250,000
Issuance of common units in connection with business combinations (in units)							8,050,000
General Partner | Preferred Units | Digital Realty Trust, L.P. | Series F Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of preferred units							$ (176,191,000)
Redemption of series H preferred units (in units)							(7,300,000)
General Partner | Preferred Units | Digital Realty Trust, L.P. | Potentially dilutive Series H Cumulative Redeemable Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of preferred units					$ (353,290,000)
Redemption of series H preferred units (in units)					(14,600,000)
General Partner | Preferred Units | Digital Realty Trust, L.P. | Series J Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs							$ 193,540,000
Issuance of preferred units, net of offering costs (units)							8,000,000
General Partner | Preferred Units | Digital Realty Trust, L.P. | Potentially dilutive Series K Cumulative Redeemable Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs					$ 203,264,000
Issuance of preferred units, net of offering costs (units)					8,400,000
General Partner | Preferred Units | Digital Realty Trust, L.P. | Series L Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of preferred units, net of offering costs					$ 334,886,000
Issuance of preferred units, net of offering costs (units)					13,800,000
General Partner | Common Units | Digital Realty Trust, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance		$ 8,724,731,000		$ 9,207,953,000	$ 8,724,731,000	$ 9,207,953,000	$ 4,218,659,000
Beginning balance (units)		206,425,656		205,470,300	206,425,656	205,470,300	159,019,118
Conversion of limited partner common units to general partner common units					$ 190,514,000	$ 62,004,000	$ 10,009,000
Conversion of limited partner common units to general partner common units (units)					2,154,460	711,892	562,582
Issuance of unvested restricted stock, net of forfeitures (units)					256,868	220,765	249,050
Common unit offering costs					$ 2,530,000	$ 1,194,000	$ 211,897,000
Issuance of common units, net of offering costs (in units)							2,375,000
Issuance of common units in connection with the exercise of stock options							729,000
Issuance of common units in connection with the exercise of stock options (in units)							$ 17,668
Units issued in connection with employee stock purchase plan					$ 5,462,000	$ 5,874,000	$ 5,143,000
Units issued in connection with employee stock purchase plan (units)					63,774	69,532	71,253
Units repurchased and retired to satisfy tax withholding upon vesting						$ (5,055,000)
Units repurchased and retired to satisfy tax withholding upon vesting (units)						(46,833)
Amortization of unearned compensation on share-based awards					$ 38,662,000	$ 32,456,000	$ 27,981,000
Reclassification of vested share-based awards					(8,458,000)	(3,772,000)	(10,057,000)
Adjustment to redeemable noncontrolling interests					(2,059,000)	1,596,000	4,166,000
Distributions					(900,201,000)	(833,364,000)	(681,280,000)
Cumulative effect adjustment from adoption of new accounting standard	$ (6,318,000)		$ (5,915,000)		(6,318,000)	(5,915,000)
Net income					504,771,000	249,930,000	179,457,000
Ending balance	$ 8,532,814,000		$ 8,724,731,000		$ 8,532,814,000	$ 8,724,731,000	$ 9,207,953,000
Ending balance (units)	208,900,758		206,425,656		208,900,758	206,425,656	205,470,300
General Partner | Common Units | Digital Realty Trust, L.P. | DFT Merger
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations (in units)							43,175,629
Common unit offering costs							$ 5,247,558,000
General Partner | Common Units | Digital Realty Trust, L.P. | Series F Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of preferred units							(6,309,000)
General Partner | Common Units | Digital Realty Trust, L.P. | Potentially dilutive Series H Cumulative Redeemable Preferred Stock
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of preferred units					$ (11,760,000)
Limited Partners | Common Units | Digital Realty Trust, L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance		$ 911,256,000		$ 702,579,000	$ 911,256,000	$ 702,579,000	$ 34,698,000
Beginning balance (units)		10,580,884		8,489,095	10,580,884	8,489,095	2,475,663
Conversion of limited partner common units to general partner common units					$ (190,514,000)	$ (62,004,000)	$ (10,009,000)
Conversion of limited partner common units to general partner common units (units)					2,154,460	711,892	562,582
Issuance of unvested restricted stock, net of forfeitures (units)					416,731
Issuance of common units in connection with the exercise of stock options						464,807
Issuance of common units, net of forfeitures (units)							464,244
Reclassification of vested share-based awards					$ 8,458,000	$ 3,772,000	$ 10,057,000
Adjustment to redeemable noncontrolling interests						35,678,000	8,191,000
Distributions					(38,278,000)	(32,311,000)	(20,694,000)
Net income					20,728,000	9,705,000	3,770,000
Ending balance	$ 711,650,000		$ 911,256,000		$ 711,650,000	$ 911,256,000	$ 702,579,000
Ending balance (units)	8,843,155		10,580,884		8,843,155	10,580,884	8,489,095
Limited Partners | Common Units | Digital Realty Trust, L.P. | DFT Merger
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations (in units)							6,111,770
Common unit offering costs							$ 676,566,000
Limited Partners | Common Units | Digital Realty Trust, L.P. | Ascenty
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common units in connection with business combinations						$ 253,837,000
Issuance of common units in connection with business combinations (in units)						2,338,874

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 349,326	$ 52,597	$ 599,221	$ 341,115	$ 256,267
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on disposition of properties, net			(335,148)	(80,049)	(40,354)
Unrealized gain on equity investment			(46,492)	(1,631)	0
Impairment of investments in real estate			5,351	0	28,992
Equity in earnings of unconsolidated joint ventures			(8,067)	(32,979)	(25,516)
Distributions from unconsolidated joint ventures			44,293	21,905	31,747
Write-off due to early lease terminations			11,400	2,818	3,076
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases			809,472	770,275	594,996
Amortization of acquired in-place lease value and deferred leasing costs			354,302	416,621	247,468
Amortization of share-based compensation			34,905	27,159	20,521
Non-cash amortization of terminated swaps			1,047	1,120	1,204
(Recovery of) allowance for doubtful accounts			2,159	6,304	(776)
Amortization of deferred financing costs			13,362	11,537	10,634
Loss (gain) from early extinguishment of debt			39,157	1,568	(1,990)
Amortization of debt discount/premium			2,260	3,538	2,992
Amortization of acquired above-market leases and acquired below-market leases, net			17,097	26,530	1,770
Changes in assets and liabilities:
Accounts and other receivables			(8,435)	(21,318)	(73,717)
Deferred rent			(47,858)	(39,905)	(16,564)
Deferred leasing costs			(31,270)	(72,104)	(15,363)
Other assets			(15,599)	(9,145)	(1,800)
Accounts payable, operating lease liabilities and other accrued liabilities			68,155	39,192	(16,384)
Security deposits and prepaid rents			4,505	(27,227)	16,102
Net cash provided by operating activities			1,513,817	1,385,324	1,023,305
Cash flows from investing activities:
Improvements to investments in real estate			(1,436,902)	(1,325,162)	(1,150,619)
Ascenty acquisition			0	1,679,830	0
Deconsolidation of Ascenty cash			(97,081)	0	0
Proceeds from the joint venture transactions			1,494,881	0	0
Deposits paid for acquisitions of real estate			(18,075)	0	0
Cash assumed in business combinations			0	116,000	20,650
Acquisitions of real estate			(75,704)	(410,712)	(415,764)
Proceeds from sale of assets, net of sales costs			0	286,204	89,333
Distribution of debt proceeds from closing of joint venture			0	0	135,793
Contributions to unconsolidated joint ventures			(101,101)	(673)	(93,405)
Excess proceeds from forward contract settlement			0	0	63,956
Prepaid construction costs and other investments			(2,597)	(13,254)	0
Improvement advances to tenants			(66,078)	(48,502)	(50,857)
Collection of improvement advances to tenants			27,665	39,936	43,760
Net cash used in investing activities			(274,992)	(3,035,993)	(1,357,153)
Cash flows from financing activities:
Borrowings on global revolving credit facilities			3,099,685	3,046,245	2,180,556
Repayments on global revolving credit facilities			(4,512,073)	(1,945,594)	(2,304,686)
Borrowings on unsecured term loans			0	467,922	0
Repayments on unsecured term loans			(375,000)	(674,332)	(371,520)
Borrowings on unsecured senior notes			2,869,240	1,169,006	2,265,060
Repayments on unsecured senior notes			(1,539,613)	0	0
Principal payments on unsecured senior notes			0	0	884,841
Borrowings on secured debt			0	600,000	104,000
Principal payments on secured debt			(688)	(594)	(105,546)
Repayments on other secured loans			0	0	50,000
Payment of loan fees and costs			(20,944)	(44,299)	(16,830)
Premium paid for early extinguishment of debt			(35,067)	0	0
Capital contributions from (distributions to) noncontrolling interests in consolidated joint ventures, net			63,173	66,124	(8,593)
Taxes paid related to net settlement of stock-based compensation awards			0	(5,055)	0
Proceeds from common and preferred stock offerings, net			535,620	1,194	405,437
Redemption of preferred stock			(365,050)	0	(182,500)
Proceeds from equity plans			5,462	5,874	5,872
Proceeds from forward swap contract			0	1,560	0
Payment of dividends to preferred stockholders			(74,990)	(81,316)	(68,802)
Payment of dividends to common stockholders and distributions to noncontrolling interests in operating partnership			(921,776)	(849,466)	(646,407)
Net cash (used in) provided by financing activities			(1,272,021)	1,757,269	321,200
Net (decrease) increase in cash, cash equivalents and restricted cash			(33,196)	106,600	(12,648)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			(4,773)	15,441	3,793
Cash, cash equivalents and restricted cash at beginning of period			135,222	13,181	22,036
Cash, cash equivalents and restricted cash at end of period	97,253	135,222	97,253	135,222	13,181
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized			312,848	288,643	211,549
Cash paid for income taxes			14,607	11,224	9,456
Operating cash paid used in the measurement of operating lease liabilities			89,980	0
Supplementary disclosure of noncash investing and financing activities:
Noncontrolling interests in operating partnership converted to shares of common stock			190,514	62,004	10,009
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses			197,665	189,508	149,548
Assumption of capital lease obligations upon acquisition				75,030
Non-cash derecognition of capital lease obligation			0	17,294	0
Decrease to goodwill and deferred tax liability (classified within accounts payable and other accrued liabilities)			(9,436)	0
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate			(74,903)	(410,712)	(366,105)
Accounts receivables			(76)	0	0
Acquired above-market leases			0	0	21,043
Acquired in-place lease value and deferred leasing costs			725	0	30,111
Acquired below-market leases			0	0	1,495
Cash paid for acquisition of real estate			75,704	410,712	415,764
Allocation of purchase price to business combinations:
Land	72,027	356,704	72,027	356,704
Goodwill	3,363,070	4,348,007	3,363,070	4,348,007	3,389,595
Noncontrolling interests in consolidated joint ventures	20,625	93,056	20,625	93,056
Issuance of preferred stock in connection with merger					211,897
Contribution of assets and liabilities to unconsolidated joint venture:
Net carrying value of assets and liabilities contributed to joint ventures			722,442	0	104,172
Recognition of retained investment in unconsolidated joint ventures	196,547	0	196,547	0	55,746
Deconsolidation of Ascenty and consolidated joint venture:
Investment in real estate	(15,517,684)	(15,079,726)	(15,517,684)	(15,079,726)
Account receivables	(305,501)	(299,621)	(305,501)	(299,621)
Acquired in-place lease value, deferred leasing costs and intangibles	(2,195,324)	(3,144,395)	(2,195,324)	(3,144,395)
Goodwill	(3,363,070)	(4,348,007)	(3,363,070)	(4,348,007)	(3,389,595)
Other assets	(184,561)	(185,239)	(184,561)	(185,239)
Secured debt	104,934	685,714	104,934	685,714
Accounts payable and other accrued liabilities	1,007,761	1,164,509	1,007,761	1,164,509
Non-controlling interest in consolidated joint venture	1,287,109	175,108	1,287,109	175,108	163,477
Accumulated other comprehensive loss, net	(87,922)	(115,647)	(87,922)	(115,647)
Deconsolidation of cash and cash equivalents			(97,081)	0	0
Recognition of retained investment in unconsolidated joint ventures	196,547	0	196,547	0	55,746
Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Cash and cash equivalents		116,000		116,000	20,650
Land	0	0	0	0	312,579
Buildings and improvements		425,000		425,000	3,677,497
Accounts receivables and other assets		30,000		30,000	10,978
Tenant relationship and acquired in-place lease value		495,000		495,000	1,582,385
Goodwill		982,667		982,667	2,592,181
Accounts payable and other accrued liabilities		90,000		90,000	248,259
Acquired below-market leases	0	0	0	0	(185,543)
Other working capital, net	0	0	0	0	(22,640)
Redeemable noncontrolling interests -- operating partnership			0	0	(66,259)
Noncontrolling interests in operating partnership				253,837	676,566
Noncontrolling interests in consolidated joint ventures		25,000		25,000
Deconsolidation of Ascenty and consolidated joint venture:
Goodwill		(982,667)		(982,667)	(2,592,181)
Acquisitions Through December 31, 2018 | Global revolving credit facilities, net
Allocation of purchase price to business combinations:
Long term debt	0	0	0	0	450,697
Acquisitions Through December 31, 2018 | Unsecured term loans
Allocation of purchase price to business combinations:
Long term debt	0	0	0	0	250,000
Acquisitions Through December 31, 2018 | Unsecured Debt.
Allocation of purchase price to business combinations:
Long term debt	0	0	0	0	886,831
Acquisitions Through December 31, 2018 | Mortgage notes payable and unsecured debt
Allocation of purchase price to business combinations:
Long term debt	0	0	0	0	105,000
Acquisitions Through December 31, 2018 | Acquired above-market leases
Allocation of purchase price to business combinations:
Acquired above-market leases	0	0	0	0	162,333
DFT Merger
Allocation of purchase price to business combinations:
Goodwill	2,592,146	2,592,146	2,592,146	2,592,146	2,592,146
Common stock and units issued					5,924,124
Deconsolidation of Ascenty and consolidated joint venture:
Goodwill	(2,592,146)	(2,592,146)	(2,592,146)	(2,592,146)	(2,592,146)
Corporate Joint Venture
Cash flows from investing activities:
Deconsolidation of Ascenty cash			(7,844)
Contribution of assets and liabilities to unconsolidated joint venture:
Investments in real estate			571,648	0	119,106
Other assets			171,798	0	16,700
Other liabilities			(21,004)	0	(31,634)
Recognition of retained investment in unconsolidated joint ventures	110,086		110,086
Deconsolidation of Ascenty and consolidated joint venture:
Investment in real estate	(199,063)		(199,063)
Account receivables	(14,545)		(14,545)
Acquired in-place lease value, deferred leasing costs and intangibles	(23)		(23)
Other assets	(13)		(13)
Accounts payable and other accrued liabilities	1,316		1,316
Deconsolidation of cash and cash equivalents			(7,844)
Net carrying value of assets and liabilities contributed			(220,172)
Recognition of retained investment in unconsolidated joint ventures	110,086		110,086
Derecognition of noncontrolling interest in joint venture			110,086
Preferred Stock | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Cash and equity consideration				(1,679,830)
Preferred Stock | DFT Merger
Allocation of purchase price to business combinations:
Issuance of preferred stock in connection with merger			0	0	219,250
Total Stockholders' Equity
Allocation of purchase price to business combinations:
Issuance of preferred stock in connection with merger					211,897
Total Stockholders' Equity | DFT Merger
Allocation of purchase price to business combinations:
Common stock and units issued			0	0	5,247,558
Digital Realty Trust, L.P.
Cash flows from operating activities:
Net income	349,326	52,597	599,221	341,115	256,267
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on disposition of properties, net			(335,148)	(80,049)	(40,354)
Unrealized gain on equity investment			(46,492)	(1,631)	0
Impairment of investments in real estate			5,351	0	28,992
Equity in earnings of unconsolidated joint ventures			(8,067)	(32,979)	(25,516)
Distributions from unconsolidated joint ventures			44,293	21,905	31,747
Write-off due to early lease terminations			11,400	2,818	3,076
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases			809,472	770,275	594,996
Amortization of acquired in-place lease value and deferred leasing costs			354,302	416,621	247,468
Amortization of share-based compensation			34,905	27,159	20,521
Non-cash amortization of terminated swaps			1,047	1,120	1,204
(Recovery of) allowance for doubtful accounts			2,159	6,304	(776)
Amortization of deferred financing costs			13,362	11,537	10,634
Loss (gain) from early extinguishment of debt			39,157	1,568	(1,990)
Amortization of debt discount/premium			2,260	3,538	2,992
Amortization of acquired above-market leases and acquired below-market leases, net			17,097	26,530	1,770
Changes in assets and liabilities:
Accounts and other receivables			(8,435)	(21,318)	(73,717)
Deferred rent			(47,858)	(39,905)	(16,564)
Deferred leasing costs			(31,270)	(72,104)	(15,363)
Other assets			(15,599)	(9,145)	(1,800)
Accounts payable, operating lease liabilities and other accrued liabilities			68,155	39,192	(16,384)
Security deposits and prepaid rents			4,505	(27,227)	16,102
Net cash provided by operating activities			1,513,817	1,385,324	1,023,305
Cash flows from investing activities:
Improvements to investments in real estate			(1,436,902)	(1,325,162)	(1,150,619)
Ascenty acquisition			0	1,679,830	0
Deconsolidation of Ascenty cash			(97,081)	0	0
Proceeds from the joint venture transactions			1,494,881	0	0
Deposits paid for acquisitions of real estate			(18,075)	0	0
Cash assumed in business combinations			0	116,000	20,650
Acquisitions of real estate			(75,704)	(410,712)	(415,764)
Proceeds from sale of assets, net of sales costs			0	286,204	89,333
Distribution of debt proceeds from closing of joint venture			0	0	135,793
Contributions to unconsolidated joint ventures			(101,101)	(673)	(93,405)
Excess proceeds from forward contract settlement			0	0	63,956
Prepaid construction costs and other investments			(2,597)	(13,254)	0
Improvement advances to tenants			(66,078)	(48,502)	(50,857)
Collection of improvement advances to tenants			27,665	39,936	43,760
Net cash used in investing activities			(274,992)	(3,035,993)	(1,357,153)
Cash flows from financing activities:
Repayments on global revolving credit facilities			(4,512,073)	(1,945,594)	(2,304,686)
Borrowings on unsecured term loans			0	467,922	0
Repayments on unsecured term loans			(375,000)	(674,332)	(371,520)
Borrowings on unsecured senior notes			2,869,240	1,169,006	2,265,060
Principal payments on unsecured senior notes			1,539,613	0	884,841
Borrowings on secured debt			0	600,000	104,000
Principal payments on secured debt			(688)	(594)	(105,546)
Repayments on other secured loans			0	0	50,000
Payment of loan fees and costs			(20,944)	(44,299)	(16,830)
Premium paid for early extinguishment of debt			(35,067)	0	0
Capital contributions from (distributions to) noncontrolling interests in consolidated joint ventures, net			63,173	66,124	(8,593)
Taxes paid related to net settlement of stock-based compensation awards			0	(5,055)	0
General partner contributions			541,082	7,068	411,309
General partner distributions			(365,050)	0	(182,500)
Proceeds from forward swap contract			0	1,560	0
Payment of dividends to preferred stockholders			(74,990)	(81,316)	(68,802)
Payment of dividends to common stockholders and distributions to noncontrolling interests in operating partnership			(921,776)	(849,466)	(646,407)
Net cash (used in) provided by financing activities			(1,272,021)	1,757,269	321,200
Net (decrease) increase in cash, cash equivalents and restricted cash			(33,196)	106,600	(12,648)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			(4,773)	15,441	3,793
Cash, cash equivalents and restricted cash at beginning of period			135,222	13,181	22,036
Cash, cash equivalents and restricted cash at end of period	97,253	135,222	97,253	135,222	13,181
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized			312,848	288,643	211,549
Cash paid for income taxes			14,607	11,224	9,456
Operating cash paid used in the measurement of operating lease liabilities			89,980	0
Supplementary disclosure of noncash investing and financing activities:
Limited Partner common units converted to General Partner common units			190,514	62,004	10,009
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses			197,665	189,508	149,548
Assumption of capital lease obligations upon acquisition			0	75,030	0
Non-cash derecognition of capital lease obligation			0	17,294	0
Decrease to goodwill and deferred tax liability (classified within accounts payable and other accrued liabilities)			(9,436)	0
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate			74,903	410,712	366,105
Accounts receivables			76	0	0
Acquired above-market leases			0	0	21,043
Acquired in-place lease value and deferred leasing costs			725	0	30,111
Acquired below-market leases			0	0	1,495
Cash paid for acquisition of real estate			75,704	410,712	415,764
Allocation of purchase price to business combinations:
Goodwill	3,363,070	4,348,007	3,363,070	4,348,007
Noncontrolling interests in consolidated joint ventures	20,625	93,056	20,625	93,056
Contribution of assets and liabilities to unconsolidated joint venture:
Net carrying value of assets and liabilities contributed to joint ventures			722,442	0	104,172
Recognition of retained investment in unconsolidated joint ventures	196,547	0	196,547	0	55,746
Deconsolidation of Ascenty and consolidated joint venture:
Investment in real estate	(15,517,684)	(15,079,726)	(15,517,684)	(15,079,726)
Account receivables	(305,501)	(299,621)	(305,501)	(299,621)
Acquired in-place lease value, deferred leasing costs and intangibles	(2,195,324)	(3,144,395)	(2,195,324)	(3,144,395)
Goodwill	(3,363,070)	(4,348,007)	(3,363,070)	(4,348,007)
Other assets	(184,561)	(185,239)	(184,561)	(185,239)
Secured debt	104,934	685,714	104,934	685,714
Accounts payable and other accrued liabilities	1,007,761	1,164,509	1,007,761	1,164,509
Non-controlling interest in consolidated joint venture	1,287,109	175,108	1,287,109	175,108
Accumulated other comprehensive loss, net	(91,409)	(120,393)	(91,409)	(120,393)
Deconsolidation of cash and cash equivalents			(97,081)	0	0
Recognition of retained investment in unconsolidated joint ventures	196,547	0	196,547	0	55,746
Digital Realty Trust, L.P. | Global revolving credit facilities, net
Cash flows from financing activities:
Borrowings on global revolving credit facilities			3,099,685	3,046,245	2,180,556
Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Cash and cash equivalents		116,000		116,000	20,650
Land	0	0	0	0	312,579
Buildings and improvements		425,000		425,000	3,677,497
Accounts receivables and other assets		30,000		30,000	10,978
Acquired above-market leases					162,333
Tenant relationship and acquired in-place lease value		495,000		495,000	1,582,385
Goodwill		982,667		982,667	2,592,181
Accounts payable and other accrued liabilities		90,000		90,000	248,259
Acquired below-market leases	0	0	0	0	185,543
Other working capital, net	0	0	0	0	22,640
Redeemable noncontrolling interests -- operating partnership			0	0	66,259
Noncontrolling interests in consolidated joint ventures		25,000		25,000
Deconsolidation of Ascenty and consolidated joint venture:
Goodwill		(982,667)		(982,667)	(2,592,181)
Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018 | Global revolving credit facilities, net
Allocation of purchase price to business combinations:
Long term debt	0	0	0	0	450,697
Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018 | Unsecured term loans
Allocation of purchase price to business combinations:
Long term debt	0	0	0	0	250,000
Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018 | Unsecured Debt.
Allocation of purchase price to business combinations:
Long term debt	0	0	0	0	886,831
Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018 | Secured Debt.
Allocation of purchase price to business combinations:
Long term debt	0	0	0	0	105,000
Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018 | Acquired above-market leases
Allocation of purchase price to business combinations:
Acquired above-market leases	0	0	0	0
Digital Realty Trust, L.P. | DFT Merger | Series C Preferred Stock
Allocation of purchase price to business combinations:
Common stock and units issued					219,250
Digital Realty Trust, L.P. | Corporate Joint Venture
Cash flows from investing activities:
Deconsolidation of Ascenty cash			(7,844)	0
Contribution of assets and liabilities to unconsolidated joint venture:
Investments in real estate			571,648	0	119,106
Other assets			171,798	0	16,700
Other liabilities			(21,004)	0	(31,634)
Recognition of retained investment in unconsolidated joint ventures	110,086	0	110,086	0
Deconsolidation of Ascenty and consolidated joint venture:
Investment in real estate	(199,063)	0	(199,063)	0
Account receivables	(14,545)	0	(14,545)	0
Acquired in-place lease value, deferred leasing costs and intangibles	(23)	0	(23)	0
Other assets	(13)	0	(13)	0
Accounts payable and other accrued liabilities	1,316	0	1,316	0
Deconsolidation of cash and cash equivalents			(7,844)	0
Net carrying value of assets and liabilities contributed			220,172	0
Recognition of retained investment in unconsolidated joint ventures	110,086	0	110,086	0
Derecognition of noncontrolling interest in joint venture			(110,086)	0
Digital Realty Trust, L.P. | Preferred Stock | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Cash and equity consideration				(1,679,830)
Digital Realty Trust, L.P. | Preferred Stock | Acquisitions Through December 31, 2018 | Series C Preferred Stock
Allocation of purchase price to business combinations:
Issuance of preferred stock in connection with merger			0	0	219,250
Digital Realty Trust, L.P. | Total Stockholders' Equity | DFT Merger
Allocation of purchase price to business combinations:
Common stock and units issued			0	0	5,247,558
Digital Realty Trust, L.P. | Common Units | DFT Merger
Allocation of purchase price to business combinations:
Common stock and units issued				253,837	$ 676,566
Ascenty
Cash flows from investing activities:
Deconsolidation of Ascenty cash			(97,081)
Allocation of purchase price to business combinations:
Goodwill	967,189		967,189
Noncontrolling interests in consolidated joint ventures	25,000		25,000
Contribution of assets and liabilities to unconsolidated joint venture:
Recognition of retained investment in unconsolidated joint ventures	727,439		727,439
Deconsolidation of Ascenty and consolidated joint venture:
Investment in real estate	(362,951)		(362,951)
Account receivables	(24,977)		(24,977)
Acquired in-place lease value, deferred leasing costs and intangibles	(480,128)		(480,128)
Goodwill	(967,189)		(967,189)
Other assets	(31,099)		(31,099)
Secured debt	571,873		571,873
Accounts payable and other accrued liabilities	72,449		72,449
Accumulated other comprehensive loss, net	(21,687)		(21,687)
Deconsolidation of cash and cash equivalents			(97,081)
Net carrying value of assets and liabilities contributed			(1,340,790)
Recognition of retained investment in unconsolidated joint ventures	727,439		727,439
Ascenty | Digital Realty Trust, L.P.
Cash flows from investing activities:
Deconsolidation of Ascenty cash			(97,081)	0
Allocation of purchase price to business combinations:
Goodwill	967,189	0	967,189	0
Contribution of assets and liabilities to unconsolidated joint venture:
Recognition of retained investment in unconsolidated joint ventures	727,439	0	727,439	0
Deconsolidation of Ascenty and consolidated joint venture:
Investment in real estate	(362,951)	0	(362,951)	0
Account receivables	(24,977)	0	(24,977)	0
Acquired in-place lease value, deferred leasing costs and intangibles	(480,128)	0	(480,128)	0
Goodwill	(967,189)	0	(967,189)	0
Other assets	(31,099)	0	(31,099)	0
Secured debt	571,873	0	571,873	0
Accounts payable and other accrued liabilities	72,449	0	72,449	0
Accumulated other comprehensive loss, net	21,687	0	21,687	0
Deconsolidation of cash and cash equivalents			(97,081)	0
Net carrying value of assets and liabilities contributed			1,340,790	0
Recognition of retained investment in unconsolidated joint ventures	$ 727,439	$ 0	$ 727,439	$ 0

Organization and Description of

Organization and Description of Business	12 Months Ended
	Dec. 31, 2019
Organization and Description of Business
Organization and Description of Business	1. Organization and Description of Business Digital Realty Trust, Inc. through its controlling interest in Digital Realty Trust, L.P. (the Operating Partnership) and the subsidiaries of the Operating Partnership (collectively, we, our, us or the Company) is a leading global provider of data center, colocation and interconnection solutions for customers across a variety of industry verticals ranging from cloud and information technology services, communications and social networking to financial services, manufacturing, energy, healthcare, and consumer products. The Operating Partnership, a Maryland limited partnership, is the entity through which Digital Realty Trust, Inc., a Maryland corporation, conducts its business of owning, acquiring, developing and operating data centers. Digital Realty Trust, Inc. operates as a REIT for federal income tax purposes. A summary of our data center portfolio as of December 31, 2019 and 2018 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Data Centers ​ ​ As of December 31, 2019 ​ As of December 31, 2018 ​ ​ ​ Unconsolidated ​ ​ ​ ​ Unconsolidated ​ Region ​ Operating ​ Held for Sale (1) ​ Joint Ventures ​ Total ​ Operating ​ Held for Sale ​ Joint Ventures ​ Total United States ​ 119 ​ 11 ​ 17 ​ 147 ​ 131 ​ — ​ 14 ​ 145 Europe 41 ​ — — 41 38 ​ — — 38 Latin America — ​ — 19 19 16 ​ — — 16 Asia 5 ​ — 5 10 3 ​ — 4 7 Australia 5 ​ — — 5 5 ​ — — 5 Canada 2 ​ 1 — 3 3 ​ — — 3 Total 172 ​ 12 41 225 196 ​ — 18 ​ 214 ​ (1) Includes 10 Powered Base Building® properties, which comprise 12 data centers, that are held for sale to a third party as of December 31, 2019 (see note 5). ​ On December 20, 2018, the Operating Partnership and Stellar Participações S.A. (formerly Stellar Participações Ltda.), a Brazilian subsidiary of the Operating Partnership, completed the acquisition of Ascenty, a leading data center provider in Brazil, for cash and equity consideration of approximately $2.0 billion, including cash purchased. We refer to this transaction as the Ascenty Acquisition. In March 2019, we formed a joint venture with Brookfield Infrastructure, an affiliate of Brookfield Asset Management, one of the largest owners and operators of infrastructure assets globally. Brookfield invested approximately $702 million in exchange for 49% of the total equity interests in the joint venture which owns and operates Ascenty. A subsidiary of the Operating Partnership retained the remaining equity interest in the Ascenty joint venture. The power to control the Ascenty joint venture is shared equally between the Operating Partnership and Brookfield and as a result of losing control, the Operating Partnership deconsolidated Ascenty on March 29, 2019. See note 6 for additional information. We are diversified in major metropolitan areas where data center and technology customers are concentrated, including the Atlanta, Boston, Chicago, Dallas, Los Angeles, New York, Northern Virginia, Phoenix, San Francisco, Seattle, Silicon Valley and Toronto metropolitan areas in North America, the Amsterdam, Dublin, Frankfurt, London and Paris metropolitan areas in Europe, the Fortaleza, Rio de Janeiro, Santiago and São Paulo metropolitan areas in Latin America, and the Hong Kong, Melbourne, Osaka, Seoul, Singapore, Sydney, and Tokyo metropolitan areas in the Asia Pacific region. The portfolio consists of data centers, Internet gateway facilities and office and other non-data center space. 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 December 31, 2019, Digital Realty Trust, Inc. owns a 95.9% common interest and a 100.0% preferred interest in the Operating Partnership. As of December 31, 2018, Digital Realty Trust, Inc. owned a 95.1% 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. As used in these Notes: “DFT” refers to DuPont Fabros Technology, Inc.; “DFT Merger” refers to the Company’s acquisition of DuPont Fabros Technology, Inc.; “DFT Operating Partnership” refers to DuPont Fabros Technology, L.P.; “European Portfolio Acquisition” refers to the Company’s acquisition of a portfolio of eight data centers in Europe; and “Telx Acquisition” refers to the Company’s acquisition of Telx Holdings, Inc.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies (a) Principles of Consolidation and Basis of Presentation The accompanying 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 notes to the 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 few differences between the Company and the Operating Partnership, which are reflected in these consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how we operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership. As a result, Digital Realty Trust, Inc. generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public securities from time to time and guaranteeing certain unsecured debt of the Operating Partnership and certain of its subsidiaries 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, 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 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 consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s 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 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 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: ● consolidated face financial statements; and ● the following notes to the consolidated financial statements: ● "Debt of the Company" and "Debt of the Operating Partnership"; ● "Income per Share" and "Income per Unit"; ● "Equity and Accumulated Other Comprehensive Loss, Net of the Company" and Capital and Accumulated Other Comprehensive Loss of the Operating Partnership"; and ● "Quarterly Financial Information". 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 consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of December 31, 2019 and 2018, cash equivalents consist of investments in money market instruments. (c) Investments in Real Estate Investments in real estate are stated at cost, less accumulated depreciation and amortization. Land is not depreciated. Depreciation and amortization are recorded on a straight-line basis over the estimated useful lives as follows: ​ ​ ​ ​ Acquired ground leases Terms of the related lease Buildings and improvements ​ 5-39 years Machinery and equipment ​ 7-15 years Furniture and fixtures ​ 3-5 years Leasehold improvements ​ Shorter of the estimated useful lives or the terms of the related leases Tenant improvements ​ Shorter of the estimated useful lives or the terms of the related leases ​ Improvements and replacements are capitalized when they extend the useful life, increase capacity, or improve the efficiency of the asset. Repairs and maintenance are charged to expense as incurred. Assets that are classified as held for sale are recorded at the lower of their carrying value or fair value less costs to dispose. We classify an asset as held for sale once management has the authority to approve and commits to a plan to sell, the asset is available for immediate sale, an active program to locate a buyer has commenced and the sale of the asset is probable and transfer of the asset is expected to occur within one year. Upon the classification of assets as held for sale or sold, the depreciation and amortization of the assets will cease. (d) Investments in Unconsolidated Joint Ventures The Company’s investments in unconsolidated joint ventures are accounted for using the equity method. We use the equity method when we have the ability to exercise significant influence over operating and financial policies of the venture but do not have control of the entity. Under the equity method, we initially recognize these investments in the balance sheet at our cost or proportionate share of fair value. We subsequently adjust the accounts to reflect our proportionate share of net earnings or losses recognized and other comprehensive income or loss, distributions received, contributions made and certain other adjustments, as appropriate. We do not record losses of the joint ventures in excess of our investment balances unless we are liable for the obligations of the joint venture or are otherwise committed to provide financial support to the joint venture. Likewise, and as long as we have no explicit or implicit obligations to the joint venture, we will suspend equity method accounting to the extent that cash distributions exceed our investment balances until those unrecorded earnings exceed the excess distributions previously recognized in income. In this case, we will apply cost accounting concepts which tie income recognition to the receipt of cash. Cost basis accounting concepts will apply until earnings exceed the excess distributions previously recognized in income. We amortize the difference between the cost of our investment in the joint ventures and the book value of the underlying equity into income on a straight-line basis consistent with the lives of the underlying assets. In the event the underlying asset is goodwill, the difference is not amortized. The amortization of this difference was immaterial for each of the years ended December 31, 2019, 2018 and 2017. (e) Impairment of Long-Lived and Finite-Lived Intangible Assets We review each of our properties for indicators that its carrying amount may not be recoverable. Examples of such indicators may include a significant decrease in the market price of the property, a change in the expected holding period for the property, a significant adverse change in how the property is being used or expected to be used based on the underwriting at the time of acquisition, an accumulation of costs significantly in excess of the amount originally expected for the acquisition or development of the property, or a history of operating or cash flow losses of the property. When such impairment indicators exist, we review an estimate of the future undiscounted net cash flows (excluding interest charges) expected to result from the property’s or asset group’s use and eventual disposition and compare that estimate to the carrying value of the property or the asset group. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If our future undiscounted net cash flow evaluation indicates that we are unable to recover the carrying value of a property or asset group, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property or fair value of the properties within the asset group. These losses have a direct impact on our net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results in future periods. Since cash flows on properties considered to be long-lived assets to be held and used are considered on an undiscounted basis to determine whether the carrying value of a property or asset group is recoverable, our strategy of holding properties over the long-term directly decreases the likelihood of their carrying values not being recoverable and therefore requiring the recording of an impairment loss. If our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized, and such loss could be material. If we determine that the asset fails the recoverability test, the affected assets must be reduced to their fair value. We generally estimate the fair value of rental properties utilizing a discounted cash flow analysis that includes projections of future revenues, expenses and capital improvement costs that a market participant would use based on the highest and best use of the asset, which is similar to the income approach that is commonly utilized by appraisers. In certain cases, we may supplement this analysis by obtaining outside broker opinions of value. In considering whether to classify a property as held for sale or contribution, the Company considers whether: (i) management has committed to a plan to sell or contribute the property; (ii) the property is available for immediate sale or contribution in its present condition; (iii) the Company has initiated a program to locate a buyer or joint venture partner; (iv) the Company believes that the sale or contribution of the property is probable; (v) the Company is actively marketing the property for sale or contribution at a price that is reasonable in relation to its current value; and (vi) actions required for the Company to complete the plan indicate that it is unlikely that any significant changes will be made to the plan. If all the above criteria are met, the Company classifies the property as held for sale or contribution. Assets classified as held for sale are expected to be sold to a third party and assets classified as held for contribution are expected to be contributed to an unconsolidated joint venture or to a third party within twelve months. At such time, the respective assets and liabilities are presented separately in the consolidated balance sheets and depreciation is no longer recognized. Assets held for sale or contribution are reported at the lower of their carrying amount or their estimated fair value less the costs to sell or contribute. Only those assets held for sale or contribution that constitute a strategic shift that has or will have a major effect on our operations are classified as discontinued operations. To date we have had no property dispositions or assets classified as held for sale or contribution that would meet the definition of discontinued operations. If impairment indicators arise with respect to intangible assets with finite useful lives, we evaluate impairment by comparing the carrying amount of the asset to the estimated future undiscounted net cash flows expected to be generated by the asset. If estimated future undiscounted net cash flows are less than the carrying amount of the asset, then we estimate the fair value of the asset and compare the estimated fair value to the intangible asset’s carrying value. We recognize any shortfall from carrying value as an impairment loss in the current period. (f) Purchase Accounting Purchase accounting is applied to the assets and liabilities related to all real estate investments acquired from third parties. The Company evaluates the nature of the purchase to determine whether the purchase is a business combination or an asset acquisition. Transaction costs associated with business combinations are expensed as incurred while transaction costs associated with an asset acquisition are included in the total costs of the acquisition and are allocated on a pro-rata basis to the carrying value of the assets and liabilities recognized in connection with the acquisition. The following accounting policies related to valuing the acquired tangible and intangible assets and liabilities are applicable to both business combinations and asset acquisitions. However, in the event the purchase is an asset acquisition, no goodwill or gain is permitted to be recognized. In an asset acquisition, the difference between the sum of the identified tangible and intangible assets and liabilities and the total purchase price (including transactions costs) is allocated to the identified tangible and intangible assets and liabilities on a relative fair value basis. In accordance with current accounting guidance , The fair values of the tangible assets of an acquired property are determined based on comparable land sales for land and replacement costs adjusted for physical and market obsolescence for the improvements. The fair values of the tangible assets of an acquired property are also determined by valuing the property as if it were vacant, and the “as-if-vacant” value is then allocated to land, building and tenant improvements based on management’s determination of the relative fair values of these assets. Management determines the as-if-vacant fair value of a property based on assumptions that a market participant would use, which is similar to methods used by independent appraisers. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases. In estimating carrying costs, management includes real estate taxes, insurance and other operating expenses and estimates of lost rental revenue during the expected lease-up periods based on current market demand. Management also estimates costs to execute similar leases including leasing commissions, tenant improvements, legal and other related costs. In allocating the fair value of the identified intangible assets and liabilities of an acquired property, above-market and below-market in-place lease values are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) estimated fair market lease rates from the perspective of a market participant for the corresponding in-place leases, measured, for above-market leases, over a period equal to the remaining non-cancelable term of the lease and, for below-market leases, over a period equal to the initial term plus any below-market fixed rate renewal periods. The leases we have acquired do not currently include any below-market fixed rate renewal periods. The capitalized above-market lease values are amortized as a reduction of rental income over the remaining non-cancelable terms of the respective leases. The capitalized below-market lease values, also referred to as acquired lease obligations, are amortized as an increase to rental income over the initial terms of the respective leases and any below-market fixed rate renewal periods. In addition to the intangible value for above-market leases and the intangible negative value for below-market leases, there is intangible value related to having tenants leasing space in the purchased property, which is referred to as in-place lease value. Such value results primarily from the buyer of a leased property avoiding the costs associated with leasing the property and also avoiding rent losses and unreimbursed operating expenses during the lease-up period. Factors to be considered by management in its analysis of in-place lease values include an estimate of carrying costs during hypothetical expected lease-up periods considering current market conditions, and costs to execute similar leases. In estimating carrying costs, management includes real estate taxes, insurance and other operating expenses and estimates of lost rental revenue at market rates during the expected lease-up periods, depending on local market conditions. In estimating costs to execute similar leases, management considers leasing commissions, legal and other related expenses. The value of in-place leases is amortized to expense over the remaining initial terms of the respective leases. The Company uses the excess earnings method to value tenant relationship value, if any. Such value exists in transactions that involve the acquisition of tenants and customers that are expected to generate recurring revenues beyond existing in place lease terms. The primary factors to be considered by management in its analysis of tenant relationship value include historical tenant lease renewals and attrition rates, rental renewal probabilities and related market terms, estimated operating costs, and discount rate. Tenant relationship value is amortized to expense ratably over the anticipated life of the tenant relationships generating excess earnings, which is the period management uses to value this intangible asset. (g) Goodwill Goodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired and tangible and intangible liabilities assumed in a business combination. Goodwill is not amortized. We perform an annual impairment test for goodwill and between annual tests, we evaluate goodwill for impairment whenever events or changes in circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. In our impairment tests of goodwill, we first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If based on this assessment, we determine that the fair value of the reporting unit is not less than its carrying value, then performing the additional two-step impairment test is unnecessary. If our qualitative assessment indicates that goodwill impairment is more likely than not, we perform a two-step impairment test. We test goodwill for impairment under the two-step impairment test by first comparing the book value of net assets including goodwill to the fair value of the reporting unit. We estimate the fair value of the reporting unit using a technique based on a performance measure or measures consistent with the objective of measuring fair value, which may include quoted market prices, multiples of earnings or discounted cash flows. If the fair value is determined to be less than the book value of the net assets, including goodwill, a second step is performed to compute the amount of impairment as the difference between the implied fair value of goodwill and its carrying value. If the carrying value of goodwill exceeds its implied fair value, an impairment charge is recognized. We have not recognized any goodwill impairments since our inception. Since some of the goodwill is denominated in foreign currencies, changes to the goodwill balance occur over time due to changes in foreign currency exchange rates. The following is a summary of goodwill activity for the years ended December 31, 2019 and 2018 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impact of Change ​ Balance as of ​ ​ December 31, ​ Merger / ​ ​ ​ ​ Goodwill ​ in Foreign ​ December 31, Merger / Portfolio Acquisition 2018 Acquisition ​ Deconsolidation Adjustments (1) Exchange Rates 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Telx Acquisition ​ $ 330,845 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 330,845 European Portfolio Acquisition ​ 442,349 ​ — ​ — ​ (9,436) 7,166 ​ 440,079 DFT Merger ​ 2,592,146 ​ — ​ — ​ — — ​ 2,592,146 Ascenty Acquisition ​ 982,667 ​ — ​ (967,189) ​ — (15,478) ​ — Total ​ $ 4,348,007 ​ $ — ​ $ (967,189) ​ $ (9,436) ​ $ (8,312) ​ $ 3,363,070 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impact of Change ​ Balance as of ​ ​ December 31, ​ Merger / ​ ​ ​ ​ Goodwill ​ in Foreign ​ December 31, ​ ​ 2017 Acquisition ​ Deconsolidation Adjustments Exchange Rates 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Telx Acquisition ​ $ 330,845 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 330,845 European Portfolio Acquisition ​ 466,604 ​ — ​ — ​ — (24,255) ​ 442,349 DFT Merger ​ 2,592,146 ​ — ​ — ​ — — ​ 2,592,146 Ascenty Acquisition ​ — ​ 982,667 ​ — ​ — — ​ 982,667 Total ​ $ 3,389,595 ​ $ 982,667 ​ $ — ​ $ — ​ $ (24,255) ​ $ 4,348,007 ​ (1) As a result of a subsequent reduction to an acquired deferred tax liability that would not have impacted consideration paid, goodwill was adjusted. ​ ​ (h) 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. During the development period, all costs including the associated land are classified to construction in progress and space held for development. Upon completion of the development period for a project, accumulated construction in progress costs including the land related to a project are allocated to the specific components of a project that are benefited. Construction in progress and space held for development includes the cost of land, the cost of construction of buildings, improvements and fixed equipment, and costs for design and engineering. Other costs, such as interest, legal, property taxes and corporate project supervision, which can be directly associated with the project during construction, are also included in construction in progress and space held for development. Land held for development includes parcels of land owned by the Company, upon which the Company intends to develop and own data centers, but has yet to commence development. During the years ended December 31, 2019, 2018 and 2017, we capitalized interest of approximately $40.2 million, $34.7 million and $21.7 million, respectively. During the years ended December 31, 2019, 2018 and 2017, we capitalized amounts relating to compensation expense and other overhead expense of employees direct and incremental to construction activities of approximately $50.3 million, $42.0 million and $38.0 million, respectively. (i) Deferred Leasing Costs Leasing commissions and other direct and indirect costs associated with the acquisition of tenants are capitalized and amortized on a straight-line basis over the terms of the related leases. During the years ended December 31, 2019, 2018 and 2017, we capitalized amounts relating to fixed compensation expense and other overhead expense of employees direct and incremental to successful leasing activities of approximately $0.0 million, $37.0 million and $43.4 million, respectively. During the years ended December 31, 2019, 2018 and 2017, we capitalized amounts relating to variable compensation of employees direct and incremental to successful leasing activities of approximately $30.8 million, $27.2 million and $10.6 million, respectively. Deferred leasing costs is included in acquired in-place lease value, deferred leasing costs and intangibles on the consolidated balance sheet and amounted to approximately $291.8 million and $322.2 million, net of accumulated amortization, as of December 31, 2019 and 2018, respectively. Amortization expense on leasing costs was approximately $75.3 million, $72.9 million, and $50.1 million for the years ended December 31, 2019, 2018 and 2017, respectively. (j) Foreign Currency Translation Assets and liabilities of our subsidiaries outside the United States with non-U.S. dollar functional currencies are translated into U.S. dollars using exchange rates as of the balance sheet dates. Income and expenses are translated using the average exchange rates for the reporting period. Foreign currency translation adjustments are recorded as a component of other comprehensive income. In the statement of cash flows, cash flows denominated in foreign currencies are translated using the exchange rates in effect at the time of the cash flows or an average exchange rate for the period, depending on the nature of the cash flow item. (k) Deferred Financing Costs Loan fees and costs are recorded as an adjustment to the carrying amount of the related debt and amortized over the life of the related loans on a straight-line basis, which approximates the effective interest method. Such amortization is included as a component of interest expense. (l) Restricted Cash Restricted cash consists of deposits for real estate taxes and insurance and other amounts as required by our loan agreements including funds for leasing costs and improvements related to unoccupied space. (m) Offering Costs Underwriting commissions and other offering costs are reflected as a reduction in additional paid-in capital, or in the case of preferred stock, as a reduction of the carrying value of preferred stock. (n) 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 15) 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 is not adjusted based on actual achievement of the market condition. (o) Derivative Instruments Derivative financial instruments are employed to manage risks, including foreign currency and interest rate exposures and are not used for trading or speculative purposes. As part of the Company’s risk management program, a variety of financial instruments, such as interest rate swaps and foreign exchange contracts, may be used to mitigate interest rate exposure and foreign currency exposure. The Company recognizes all derivative instruments in the balance sheet at fair value. Changes in the fair value of derivatives are recognized periodically either in earnings or in stockholders’ equity as a component of accumulated other comprehensive income (loss), depending on whether the derivative financial instrument is undesignated or qualifies for hedge accounting, and if so, whether it represents a fair value, cash flow, or net investment hedge. Gains and losses on derivatives designated as cash flow hedges, to the extent they are included in the assessment of effectiveness, are recorded in other comprehensive income (loss) and subsequently reclassified to earnings to offset the impact of the hedged items when they occur. In the event it becomes probable the forecasted transaction to which a cash flow hedge relates will not occur, the derivative would be terminated and the amount in other comprehensive income (loss) would be recognized in earnings. Changes in the fair value of derivatives that are designated and qualify as a hedge of the net investment in foreign operations, to the extent they are included in the assessment of effectiveness, are reported in other comprehensive income (loss) and are deferred until disposal of the underlying assets. Gains and losses representing components excluded from the assessment of effectiveness for cash flow and fair value hedges are recognized in earnings on a straight-line basis in the same caption as the hedged item over the term of the hedge. Gains and losses representing components excluded from the assessment of effectiveness for net investment hedges are recognized in earnings on a straight-line basis over the term of the hedge. The net interest paid or received on interest rate swaps is recognized as interest expense. Gains and losses resulting from the early termination of interest rate swap agreements are deferred and amortized as adjustments to interest expense over the remaining period of the debt originally covered by the terminated swap. See Note 16 for further discussion on derivative instruments. (p) 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 U.S. 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 U.S. federal income tax (including any applicable alternative minimum tax for taxable years prior to 2018) on its taxable income. The Company is subject to foreign, state and local income taxes in the jurisdictions in which it conducts business. The Company’s taxable REIT subsidiaries are subject to feder

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2019
Business Combinations
Business Combinations	3. Business Combinations and Deconsolidation Ascenty Acquisition We completed the Ascenty Acquisition on December 20, 2018 for total cash and equity consideration of approximately $2.0 billion, including approximately $116.0 million of assumed cash and cash equivalents. As of December 31, 2018, the estimated fair values of acquired assets and assumed liabilities were provisional estimates, but were based on the best information available. The following table summarizes the provisional amounts for acquired assets and liabilities recorded at their fair values as of the acquisition date (in thousands): ​ ​ ​ ​ ​ Building and improvements $ 425,000 Goodwill ​ 982,667 Tenant relationship value ​ 375,000 Acquired in-place lease value ​ 120,000 Cash and cash equivalents ​ 116,000 Other assets ​ 30,000 Other liabilities ​ (40,000) Capital lease and other long-term obligations ​ (50,000) Total purchase price ​ $ 1,958,667 ​ Goodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired and tangible and intangible liabilities assumed in the acquisition. As shown above, we recorded approximately $1.0 billion of goodwill related to the Ascenty Acquisition. The strategic benefits of the acquisition include the Company’s ability to continue its strategy to provide foundational data center real estate solutions on a global basis with a diversified product offering of both small and large footprint deployments as well as interconnection services. These factors contributed to the goodwill that was recorded upon consummation of the transaction. The transaction was initially funded with $600.0 million of proceeds from a non-recourse, five-year secured term loan; the issuance of approximately $254 million of Operating Partnership common units in exchange for the substantial majority of the Ascenty management’s equity interests; and approximately $1.0 billion of unsecured corporate borrowings. Ascenty Deconsolidation On March 29, 2019, we formed a joint venture with Brookfield Infrastructure, an affiliate of Brookfield Asset Management. Brookfield invested approximately deconsolidated Ascenty. We recognized a gain of approximately $67.5 million (net of the accumulated foreign currency translation loss related to Ascenty) on the deconsolidation and subsequent recognition of our subsidiary's 51% equity investment in the Ascenty joint venture at its estimated fair value of $727 million on March 29, 2019. The fair value of the Company’s retained equity investment is based on Level 2 measurements within the fair value hierarchy based on the cash price paid by Brookfield for their 49% interest. The gain was calculated based on the: (i) the sum of the cash proceeds of $702 million received from Brookfield for its 49% interest and the estimated fair value of $727 million for our 51% retained interest less (ii) the carrying value of the Ascenty assets and liabilities deconsolidated as of March 29, 2019. The gain related to the remeasurement of the Company's retained equity interests to fair value was approximately $43.7 million. The reported gain of $67.5 million was net of a foreign currency translation loss of approximately $21.7 million previously included in accumulated other comprehensive loss, net, which accumulated during the period the Company consolidated Ascenty and translated the Brazilian Real, Ascenty's functional currency, into the Company's functional currency. The Company has no other subsidiaries or businesses with the Brazilian Real as its functional currency and, therefore, the deconsolidation of Ascenty resulted in the reclassification out of accumulated other comprehensive loss into a component of income from continuing operations in the 2019 consolidated income statement. The Ascenty deconsolidation did not meet the criteria to be presented as a discontinued operation in accordance with ASC 205-20, Presentation of Financial Statements Discontinued Operations,

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases
Leases	4. Leases Lessee accounting ​ We lease space at certain of our data centers from third parties and certain equipment under noncancelable lease agreements. Leases for our data centers expire at various dates through 2048. As of December 31, 2019 and 2018, certain of our data centers, primarily in Europe and Singapore, are subject to ground leases. As of December 31, 2019, the termination dates of these ground leases range from 2024 to 2981. In addition, our corporate headquarters along with several regional office locations are subject to leases with termination dates ranging from 2021 to 2027. The leases may contain renewal and/or early termination options that are not reasonably certain of exercise as of December 31, 2019. Also, the leases generally require us to make fixed rental payments that increase at defined intervals during the term of the lease plus pay our share of common area, real estate and utility expenses as incurred. The leases neither contain residual value guarantees nor impose material restrictions or covenants on us. Further, the leases have been classified and accounted for as either operating or finance leases. Supplemental balance sheet information related to leases as of December 31, 2019 was as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ Balance Sheet Balance as of ​ ​ Classification ​ December 31, 2019 Assets: ​ Operating lease assets Operating lease right-of-use assets, net (1) ​ $ 628,681 Finance lease assets Buildings and improvements, net (2) ​ 131,072 Total leased assets ​ $ 759,753 ​ ​ ​ ​ ​ ​ Liabilities: ​ Operating lease liabilities Operating lease liabilities ​ $ 693,539 Finance lease liabilities Accounts payable and other accrued liabilities ​ 178,086 Total lease liabilities ​ $ 871,625 ​ _________________________ (1) Net of accumulated depreciation and amortization of $51.7 million as of December 31, 2019. (2) Net of accumulated depreciation and amortization of $4.9 million as of December 31, 2019. ​ The components of lease expense for the year ended December 31, 2019 were as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended Lease cost ​ Income Statement Classification ​ December 31, 2019 ​ ​ ​ ​ ​ ​ Finance lease cost: ​ Amortization of right-of-use assets Depreciation and amortization ​ $ 5,074 Interest on lease liabilities Interest expense ​ 6,044 Operating lease cost Rental property operating and maintenance / General and administrative ​ 90,980 Total lease cost ​ $ 102,098 ​ As of December 31, 2019, the weighted average remaining lease term for our operating leases and finance leases was 12 years and 24 years, respectively. We do not include renewal options in the lease term for calculating the lease liability unless we are reasonably certain we will exercise the option or the lessor has the sole ability to exercise the option. The weighted average incremental borrowing rate was 4.1% for operating leases and 3.5% for finance leases at December 31, 2019. We assigned a collateralized interest rate to each lease based on the term of the lease and the currency in which the lease is denominated. ​ The minimum commitment under operating leases, excluding fully prepaid ground leases, as of December 31, 2018 was as follows (in thousands): ​ ​ ​ ​ ​ 2019 $ 84,712 2020 ​ 87,396 2021 ​ 86,212 2022 ​ 81,976 2023 ​ 80,707 Thereafter ​ 539,047 Total ​ $ 960,050 ​ ​ Future minimum lease payments and their present value for property under capital lease obligations as of December 31, 2018, are as follows (in thousands): ​ ​ ​ ​ ​ 2019 $ 11,657 2020 ​ 13,108 2021 ​ 13,207 2022 ​ 13,706 2023 ​ 14,219 Thereafter ​ 285,774 ​ ​ 351,671 Less amount representing interest ​ (137,827) Present value ​ $ 213,844 ​ ​ Maturities of lease liabilities as of December 31, 2019 were as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Finance ​ ​ lease liabilities ​ lease liabilities 2020 ​ $ 85,277 ​ $ 8,881 2021 ​ 84,796 ​ 8,927 2022 ​ 81,021 ​ 9,399 2023 ​ 79,751 ​ 9,865 2024 ​ 73,612 ​ 9,914 Thereafter ​ 478,241 ​ 226,261 Total undiscounted future cash flows ​ 882,698 ​ 273,247 Less: Imputed interest ​ (189,159) ​ (95,161) Present value of undiscounted future cash flows ​ $ 693,539 ​ $ 178,086 ​ Lessor accounting ​ The following table summarizes the minimum lease payments due from our customers on leases with lease periods greater than one year for space in our operating properties, prestabilized development properties and leases of land subject to ground leases at December 31, 2019 (in thousands): ​ ​ ​ ​ ​ ​ Operating leases 2020 ​ $ 2,810,508 2021 ​ 1,947,216 2022 ​ 1,552,045 2023 ​ 1,333,620 2024 ​ 1,089,305 Thereafter ​ 4,091,199 Total ​ $ 12,823,893 ​ These amounts do not reflect future rental revenues from the renewal or replacement of existing leases unless we are reasonably certain we will exercise the option or the lessor has the sole ability to exercise the option. We exclude reimbursements of operating expenses and rental increases that are not fixed.

Investments in Real Estate

Investments in Real Estate	12 Months Ended
	Dec. 31, 2019
Investments in Real Estate.
Investments in Real Estate	5 A summary of our investments in properties as of December 31, 2019 and 2018 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2019 ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ Depreciation ​ Net Investments ​ ​ ​ Land Held ​ Net ​ ​ ​ ​ ​ Ground ​ Buildings and ​ Tenant ​ and ​ in Operating ​ Construction in ​ For Future ​ Investment Property Type ​ Land ​ Lease ​ Improvements ​ Improvements ​ Amortization ​ Properties ​ Progress ​ Development ​ in Properties Internet Gateway Data Centers ​ $ 99,653 ​ $ — ​ $ 2,133,198 ​ $ 126,264 ​ $ (995,202) ​ $ 1,363,913 ​ $ 85,605 ​ $ — ​ $ 1,449,518 Data Centers (1) ​ 659,184 ​ 10,725 ​ 13,046,742 ​ 494,052 ​ (3,481,542) ​ 10,729,161 ​ 1,543,534 ​ 147,597 ​ 12,420,292 Technology Manufacturing ​ 11,959 ​ — ​ 1,603 ​ 76 ​ (161) ​ 13,477 ​ 10 ​ — ​ 13,487 Technology Office ​ 27,807 ​ — ​ 29,071 ​ — ​ (22,188) ​ 34,690 ​ 59,229 ​ — ​ 93,919 Other ​ 6,227 ​ — ​ 239,270 ​ 761 ​ (37,076) ​ 209,182 ​ 44,177 ​ — ​ 253,359 ​ ​ $ 804,830 ​ $ 10,725 ​ $ 15,449,884 ​ $ 621,153 ​ $ (4,536,169) ​ $ 12,350,423 ​ $ 1,732,555 ​ $ 147,597 ​ $ 14,230,575 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2018 ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ Depreciation ​ Net Investments ​ ​ ​ Land Held ​ Net ​ ​ ​ ​ ​ Ground ​ Buildings and ​ Tenant ​ and ​ in Operating ​ Construction in ​ For Future ​ Investment Property Type ​ Land ​ Lease ​ Improvements ​ Improvements ​ Amortization ​ Properties ​ Progress ​ Development ​ in Properties Internet Gateway Data Centers ​ $ 99,313 ​ $ — ​ $ 2,036,041 ​ $ 114,013 ​ $ (885,214) ​ $ 1,364,153 ​ $ 42,615 ​ $ — ​ $ 1,406,768 Data Centers (1) ​ 688,494 ​ 10,575 ​ 12,924,596 ​ 460,247 ​ (3,004,365) ​ 11,079,547 ​ 1,548,643 ​ 157,039 ​ 12,785,229 Technology Manufacturing ​ 11,959 ​ — ​ 1,582 ​ 76 ​ (100) ​ 13,517 ​ — ​ — ​ 13,517 Technology Office ​ 58,066 ​ — ​ 26,106 ​ — ​ (20,015) ​ 64,157 ​ — ​ — ​ 64,157 Other ​ 1,281 ​ — ​ 622,667 ​ — ​ (25,573) ​ 598,375 ​ 30,670 ​ 5,902 ​ 634,947 ​ ​ $ 859,113 ​ $ 10,575 ​ $ 15,610,992 ​ $ 574,336 ​ $ (3,935,267) ​ $ 13,119,749 ​ $ 1,621,928 ​ $ 162,941 ​ $ 14,904,618 (1) Balances include vacant land to support ground-up development. On September 16, 2019, we announced the proposed sale of 10 Powered Base Building® properties, which comprise 12 data centers, in North America to Mapletree Investments Pte Ltd (“Mapletree Investments”) and Mapletree Industrial Trust (“MIT” and together with Mapletree Investments, “Mapletree”), at a purchase consideration of approximately $557.0 million. As of December 31, 2019, these 12 data centers had an aggregate carrying value of $229.9 million within total assets and $2.7 million within total liabilities and are shown as assets held for sale and obligations associated with assets held for sale on the consolidated balance sheet. The 12 data centers are not representative of a significant component of our portfolio, nor does the potential sales represent a significant shift in our strategy. Subsequent to year-end, we closed on the sale of the 12 data centers in January 2020, for a gain of approximately $303.3 million. We will provide transitional property management services for one year from the closing date at a customary market rate. Acquisitions We acquired the following real estate during the years ended December 31, 2019 and 2018 (excluding business combinations already discussed in Note 3): 2019 Acquisitions ​ ​ ​ ​ ​ ​ ​ ​ Amount Property Type (in millions) (2) Land parcels (1) ​ $ 47.7 Technology office (3) ​ 28.0 ​ ​ ​ $ 75.7 ​ 2018 Acquisitions ​ ​ ​ ​ ​ ​ Amount Property Type ​ (in millions) (2) Land Parcels (1) ​ $ 296.1 Data Centers ​ 114.6 ​ ​ $ 410.7 (1) Represents currently vacant land which is not included in our operating property count. (2) Purchase price in U.S. dollars and excludes capitalized closing costs. (3) Property to be redeveloped. ​ The table below reflects the purchase price allocation for the above properties acquired in 2019 and 2018 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Above- ​ ​ Below- Acquisition ​ ​ ​ ​ ​ Buildings and ​ Tenant ​ Market ​ In-Place ​ Market ​ Date Fair Property Type ​ Land ​ Improvements ​ Improvements ​ Leases ​ Leases ​ Leases ​ Value 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Land Parcels ​ $ 47,712 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 47,712 Technology office ​ 24,315 ​ 3,039 ​ — ​ — ​ 638 ​ — ​ 27,992 Total ​ $ 72,027 ​ $ 3,039 ​ $ — ​ $ — ​ $ 638 ​ $ — ​ $ 75,704 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2018 ​ ​ ​ ​ ​ ​ ​ Land Parcels ​ $ 296,071 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 296,071 Data Centers ​ 60,633 ​ 54,008 ​ — ​ — ​ — ​ — ​ 114,641 Total ​ $ 356,704 ​ $ 54,008 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 410,712 ​ Dispositions We sold the following real estate properties during the years ended December 31, 2019 and 2018: 2019 Dispositions ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Gain on contribution Location / Portfolio ​ Metro Area ​ Date Sold ​ (in millions) ​ (in millions) Mapletree portfolio (1) Northern Virginia ​ Nov 1, 2019 ​ $ 996.6 ​ $ 266.0 ​ (1) Consists of three data centers that were contributed to a joint venture (see note 6). ​ 2018 Dispositions ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Proceeds Gain on Sale Location ​ Metro Area ​ Date Sold ​ (in millions) ​ (in millions) 200 Quannapowitt Parkway ​ Boston ​ Jan 25, 2018 ​ $ 15.0 ​ $ (0.4) 34551 Ardenwood Boulevard ​ ​ Silicon Valley ​ ​ Feb 9, 2018 ​ ​ 73.3 ​ ​ 25.3 3065 Gold Camp Drive ​ ​ Sacramento ​ ​ Mar 14, 2018 ​ ​ 14.2 ​ ​ 5.4 11085 Sun Center Drive ​ ​ Sacramento ​ ​ Mar 14, 2018 ​ ​ 36.8 ​ ​ 9.1 Austin Portfolio ​ ​ Austin ​ ​ Apr 19, 2018 ​ ​ 47.6 ​ ​ 12.0 2010 East Centennial Circle ​ ​ Phoenix ​ ​ May 22, 2018 ​ ​ 5.5 ​ ​ (0.5) 1125 Energy Park Drive ​ Minneapolis ​ ​ May 31, 2018 ​ 7.0 ​ 2.8 360 Spear Street ​ San Francisco ​ ​ Sep 21, 2018 ​ 92.3 ​ 26.7 ​ ​ ​ ​ ​ ​ ​ ​ $ 291.7 ​ $ 80.4 ​

Investments in Unconsolidated J

Investments in Unconsolidated Joint Ventures	12 Months Ended
	Dec. 31, 2019
Investments in Unconsolidated Joint Ventures
Investments in Unconsolidated Joint Ventures	6. Investments in Unconsolidated Joint Ventures As of December 31, 2019 and 2018, our investments in unconsolidated joint ventures accounted for under the equity method of accounting presented in our consolidated balance sheets consist of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Joint ​ # of Metropolitan ​ Balance as of Balance as of Joint Venture ​ Venture Formed ​ Data Centers ​ Area ​ % Ownership ​ December 31, 2019 ​ December 31, 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ascenty (1)(3) ​ 2019 ​ 19 Brazil / Chile 51 % (2) $ 774,853 ​ $ — Mapletree ​ 2019 ​ 3 ​ Northern Virginia ​ 20 % ​ 208,354 ​ ​ — Mitsubishi ​ 2017 ​ 4 Osaka / Tokyo 50 % 200,652 ​ 66,835 CenturyLink ​ 2012 ​ 1 Hong Kong 50 % 88,647 ​ 96,094 Other ​ Various ​ 14 U.S. Various ​ 14,603 ​ 12,179 Total ​ ​ ​ 41 ​ $ 1,287,109 ​ $ 175,108 (1) Our maximum exposure to loss related to this unconsolidated variable interest entity (VIE) is limited to our equity investment in this VIE. (2) Includes an approximate 2% ownership interest held by a non-controlling interest in our entity that holds the investment in the Ascenty joint venture, which has a carrying value of approximately $25.0 million and is classified with redeemable noncontrolling interests in our consolidated balance sheet. (3) See note 3 for additional information on the Ascenty joint venture. ​ Mapletree Joint Venture On November 1, 2019, we formed a joint venture with Mapletree. We contributed three Turn-Key Flex® data centers, valued at approximately $1.0 billion, to the new joint venture in exchange for a 20% interest in the joint venture and approximately $0.8 billion of cash, net of closing costs. An entity jointly owned by Mapletree Investments and MIT contributed such cash to the joint venture in exchange for an 80% interest in the joint venture. We perform the day-to-day accounting and property management functions for the joint venture and, as such, will earn a management fee based on market rates. Although we are the managing member of the joint venture and manage the day-to-day activities, the joint venture is governed by a board of directors, in which power to make decisions that most significantly impact the investment returns to the members of the joint venture, including approval of annual budgets, is shared equally between Mapletree and us. As such, we concluded we do not own a controlling interest and accounted for our interest in the joint venture under the equity method of accounting. As a result of the transaction, we received approximately $0.8 billion of cash, net of closing costs, from Mapletree’s equity contribution and a 20% equity interest in the joint venture with an estimated fair value of $193.2 million, less our share of closing costs. We recognized a gain of approximately $266.2 million, which represented the excess of the fair value received less the carrying value of the assets and liabilities contributed to the joint venture, of which, $53.2 million of the gain was related to the remeasurement of the Company's retained equity interest to fair value. The fair value of the Company’s retained equity interest is based on Level 2 measurements within the fair value hierarchy based on the cash price paid by Mapletree for their 80% interest. The following tables present summarized financial information for our unconsolidated joint ventures for the years ended December 31, 2019, 2018, and 2017 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Property Net Net ​ ​ % ​ Net Investment ​ Total ​ Mortgage ​ Total ​ Equity / ​ ​ ​ ​ Operating ​ Operating ​ Income 2019 ​ Ownership ​ in Properties ​ Assets ​ Loans ​ Liabilities ​ (Deficit) ​ Revenues ​ Expense ​ ​ Income ​ (Loss) Unconsolidated Joint Ventures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2001 Sixth Avenue 50.00 % $ 30,748 ​ $ 47,485 ​ $ 134,583 ​ $ 140,354 ​ $ (92,869) ​ $ 56,266 ​ $ (19,254) ​ $ 37,012 $ 27,422 2020 Fifth Avenue 50.00 % 43,918 ​ 54,325 ​ 48,000 ​ 48,703 ​ 5,622 ​ 9,868 ​ (2,544) ​ 7,324 ​ 4,649 CenturyLink 50.00 % 148,941 ​ 187,241 ​ — ​ 9,947 ​ 177,294 ​ 24,680 ​ (9,251) ​ 15,429 ​ 6,712 Mitsubishi 50.00 % 554,828 ​ 753,743 ​ 231,046 ​ 303,130 ​ 450,613 ​ 84,344 ​ (39,300) ​ 45,044 ​ 18,751 Ascenty ​ 51.00 % ​ 548,114 ​ ​ 2,178,663 ​ ​ 629,500 ​ ​ 764,603 ​ ​ 1,414,060 ​ ​ 112,052 ​ ​ (40,250) ​ ​ 71,802 ​ ​ (54,606) Mapletree ​ 20.00 % ​ 765,443 ​ ​ 1,042,661 ​ ​ — ​ ​ 23,796 ​ ​ 1,018,865 ​ ​ 17,852 ​ ​ (6,774) ​ ​ 11,078 ​ ​ (1,872) PREI ® 20.00 % 365,993 ​ 421,635 ​ 210,915 ​ 281,344 ​ 140,291 ​ 42,157 ​ (9,918) ​ 32,239 ​ 9,968 GCEAR 20.00 % 109,803 ​ 127,444 ​ 101,902 ​ 104,363 ​ 23,081 ​ 21,120 ​ (9,073) ​ 12,047 ​ (2,636) Other ​ 7%-17 % ​ 59,901 ​ ​ 64,553 ​ ​ 4,438 ​ ​ 4,706 ​ ​ 59,847 ​ ​ 11,261 ​ ​ (6,779) ​ ​ 4,482 ​ ​ (31) Total Unconsolidated Joint Ventures ​ ​ ​ $ 2,627,689 ​ $ 4,877,750 ​ $ 1,360,384 ​ $ 1,680,946 ​ $ 3,196,804 ​ $ 379,600 ​ $ (143,143) ​ $ 236,457 $ 8,357 Our investment in and share of equity in earnings of unconsolidated joint ventures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 1,287,109 ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 8,067 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Property Net Net ​ ​ % ​ Net Investment ​ Total ​ Mortgage ​ Total ​ Equity / ​ ​ ​ ​ Operating ​ Operating ​ Income 2018 ​ Ownership ​ in Properties ​ Assets ​ Loans ​ Liabilities ​ (Deficit) ​ Revenues ​ Expense ​ Income ​ (Loss) Unconsolidated Joint Ventures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2001 Sixth Avenue 50.00 % $ 32,786 ​ $ 49,278 ​ $ 134,527 ​ $ 139,569 ​ $ (90,291) ​ $ 52,806 ​ $ (17,264) ​ $ 35,542 $ 25,612 2020 Fifth Avenue 50.00 % 44,644 ​ 54,855 ​ 48,000 ​ 48,333 ​ 6,522 ​ 9,417 ​ (2,156) ​ 7,261 ​ 4,689 CenturyLink 50.00 % 151,256 ​ 201,527 ​ — ​ 9,337 ​ 192,190 ​ 21,394 ​ (7,164) ​ 14,230 ​ 6,958 Mitsubishi 50.00 % 332,373 ​ 469,159 ​ 228,075 ​ 285,424 ​ 183,735 ​ 59,300 ​ (26,360) ​ 32,940 ​ 15,884 PREI ® 20.00 % 375,016 ​ 433,024 ​ 210,626 ​ 283,899 ​ 149,125 ​ 42,058 ​ (8,457) ​ 33,601 ​ (4,159) GCEAR 20.00 % 111,909 ​ 139,268 ​ 101,885 ​ 104,268 ​ 35,000 ​ 20,457 ​ (8,546) ​ 11,911 ​ (2,177) Other 17.00 % 22,677 ​ 24,320 ​ 5,225 ​ 5,327 ​ 18,993 ​ 9,383 ​ (5,879) ​ 3,504 ​ 415 Total Unconsolidated Joint Ventures ​ ​ ​ $ 1,070,661 ​ $ 1,371,431 ​ $ 728,338 ​ $ 876,157 ​ $ 495,274 ​ $ 214,815 ​ $ (75,826) ​ $ 138,989 $ 47,222 Our investment in and share of equity in earnings of unconsolidated joint ventures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 175,108 ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 32,979 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Property Net Net ​ ​ % ​ Net Investment ​ Total ​ Mortgage ​ Total ​ Equity / ​ ​ ​ ​ Operating ​ Operating ​ Income 2017 ​ Ownership ​ in Properties ​ Assets ​ Loans ​ Liabilities ​ (Deficit) ​ Revenues ​ Expense ​ Income ​ (Loss) Unconsolidated Joint Ventures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2001 Sixth Avenue 50.00 % $ 26,933 ​ $ 50,481 ​ $ 134,472 ​ $ 138,564 ​ $ (88,083) ​ $ 49,369 ​ $ (16,719) ​ $ 32,650 $ 20,833 2020 Fifth Avenue 50.00 % 45,309 ​ 54,594 ​ 47,000 ​ 47,249 ​ 7,345 ​ 9,088 ​ (1,820) ​ 7,268 4,881 CenturyLink 50.00 % 133,435 ​ 192,071 ​ — ​ 5,598 ​ 186,473 ​ 19,235 ​ (6,504) ​ 12,731 5,467 Mitsubishi 50.00 % 325,977 ​ 452,063 ​ 221,851 ​ 288,962 ​ 163,101 ​ 7,927 ​ (4,218) ​ 3,709 1,108 PREI ® 20.00 % 399,967 ​ 456,912 ​ 207,687 ​ 285,050 ​ 171,862 ​ 41,464 ​ (7,978) ​ 33,486 13,889 GCEAR 20.00 % 114,376 ​ 151,191 ​ 101,680 ​ 104,220 ​ 46,971 ​ 18,924 ​ (7,362) ​ 11,562 (1,962) Other 17.00 % 15,953 ​ 17,694 ​ — ​ 236 ​ 17,458 ​ 5,958 ​ (4,629) ​ 1,329 (272) Total Unconsolidated Joint Ventures ​ ​ ​ $ 1,061,950 ​ $ 1,375,006 ​ $ 712,690 ​ $ 869,879 ​ $ 505,127 ​ $ 151,965 ​ $ (49,230) ​ $ 102,735 $ 43,944 Our investment in and share of equity in earnings of unconsolidated joint ventures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 163,477 ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 25,516 ​ The amounts reflected in the tables above, except for our investment in and share of equity in earnings of unconsolidated joint ventures, are based on the historical financial information of the individual joint ventures. The debt of our unconsolidated joint ventures generally is non-recourse to us, except for customary exceptions pertaining to such matters as intentional misuse of funds, environmental conditions, and material misrepresentations.

Acquired Intangible Assets and

Acquired Intangible Assets and Liabilities	12 Months Ended
	Dec. 31, 2019
Acquired Intangible Assets and Liabilities
Acquired Intangible Assets and Liabilities	7. Acquired Intangible Assets and Liabilities The following summarizes our acquired intangible assets (real estate intangibles, comprised of acquired in-place lease value and tenant relationship value along with acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of December 31, 2019 and 2018. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of (Amounts in thousands) December 31, 2019 December 31, 2018 Real Estate Intangibles: ​ ​ ​ ​ ​ ​ Acquired in-place lease value: ​ ​ ​ ​ ​ ​ Gross amount ​ $ 1,357,190 ​ $ 1,569,401 Accumulated amortization ​ (899,071) ​ (795,033) Net ​ $ 458,119 ​ $ 774,368 Tenant relationship value: ​ ​ Gross amount ​ $ 1,845,949 ​ $ 2,339,606 Accumulated amortization ​ (400,570) ​ (291,818) Net ​ $ 1,445,379 ​ $ 2,047,788 Acquired above-market leases: ​ ​ Gross amount ​ $ 279,048 ​ $ 277,796 Accumulated amortization ​ (204,233) ​ (158,037) Net ​ $ 74,815 ​ $ 119,759 Acquired below-market leases: ​ ​ Gross amount ​ $ 396,509 ​ $ 442,535 Accumulated amortization ​ (247,735) ​ (242,422) Net ​ $ 148,774 ​ $ 200,113 ​ Amortization of acquired below-market lease value, net of acquired above-market lease value, resulted in a decrease in rental revenues of $(17.1) million, $(27.3) million and $(2.2) million for the years ended December 31, 2019, 2018 and 2017, respectively. The expected average remaining lives for acquired below-market leases and acquired above-market leases was 8.0 years and 2.5 years, respectively, as of December 31, 2019. Estimated annual amortization of acquired below-market lease value, net of acquired above-market lease value, for each of the five succeeding years and thereafter, commencing January 1, 2020 is as follows: ​ ​ ​ ​ ​ (Amounts in thousands) ​ ​ 2020 ​ $ (10,648) 2021 ​ (3,501) 2022 ​ 4,735 2023 ​ 9,500 2024 ​ 10,149 Thereafter ​ 63,724 Total ​ $ 73,959 ​ Amortization of acquired in-place lease value (a component of depreciation and amortization expense) was $143.0 million, $211.0 million and $101.2 million for the years ended December 31, 2019, 2018 and 2017, respectively. The expected average amortization period for acquired in-place lease value was 5.8 years as of December 31, 2019. The weighted average remaining contractual life for acquired leases excluding renewals or extensions was 5.5 years as of December 31, 2019. Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing January 1, 2020 is as follows: ​ ​ ​ ​ ​ (Amounts in thousands) ​ ​ 2020 ​ $ 98,875 2021 ​ 78,329 2022 ​ 58,621 2023 ​ 47,449 2024 ​ 40,217 Thereafter ​ 134,628 Total ​ $ 458,119 ​ Amortization of tenant relationship value (a component of depreciation and amortization expense) was approximately $128.4 million, $123.5 million and $85.9 million for the years ended December 31, 2019, 2018 and 2017, respectively. As of December 31, 2019, the weighted average remaining contractual life for tenant relationship value was 13.0 years. Estimated annual amortization of tenant relationship value for each of the five succeeding years and thereafter, commencing January 1, 2020 is as follows: ​ ​ ​ ​ ​ (Amounts in thousands) ​ ​ 2020 ​ $ 116,673 2021 ​ 116,673 2022 ​ 116,673 2023 ​ 116,673 2024 ​ 116,673 Thereafter ​ 862,014 Total ​ $ 1,445,379 ​

Debt of the Company

Debt of the Company	12 Months Ended
	Dec. 31, 2019
Debt of the Company
Debt of the Company	8. Debt of the Company In this Note 8, the “Company” refers only to Digital Realty Trust, Inc. and not to any of its subsidiaries. The Company itself does not have any indebtedness. All debt is held directly or indirectly by the Operating Partnership. Guarantee of Debt The Company guarantees the Operating Partnership’s obligations with respect to its 3.950% notes due 2022 (3.950% 2022 Notes), 3.625% notes due 2022 (3.625% 2022 Notes), 2.750% notes due 2023 (2.750% 2023 Notes), 4.750% notes due 2025 (4.750% 2025 Notes), 3.700% notes due 2027 (2027 Notes), 4.450% notes due 2028 (2028 Notes) and 3.600% notes due 2029 (3.600% 2029 Notes). 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 (4.750% 2023 Notes), 2.750% notes due 2024 (2.750% 2024 Notes), 4.250% notes due 2025 (4.250% 2025 Notes), 3.300% notes due 2029 (2029 Notes) and 3.750% notes due 2030 (2030 Notes) and the obligations of Digital Euro Finco, LLC, a wholly owned subsidiary of the Operating Partnership, with respect to its 2.625% notes due 2024 (2.625% 2024 Notes), 2.500% notes due 2026 (2026 Notes) and 1.125% notes due 2028 (1.125% 2028 Notes). The Company is also the guarantor of the Operating Partnership’s and its subsidiary borrowers’ obligations under the global revolving credit facilities and unsecured term loans.

Debt of the Operating Partnersh

Debt of the Operating Partnership	12 Months Ended
	Dec. 31, 2019
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Debt of the Operating Partnership	9. Debt of the Operating Partnership A summary of outstanding indebtedness of the Operating Partnership as of December 31, 2019 and 2018 is as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate at ​ ​ Principal Principal ​ ​ December 31, ​ ​ ​ Outstanding at ​ Outstanding at ​ Indebtedness ​ 2019 ​ Maturity Date ​ December 31, 2019 ​ December 31, 2018 ​ Global revolving credit facilities Various (1) ​ Jan 24, 2023 (1) $ 245,766 (2) $ 1,663,156 (2) Deferred financing costs, net ​ ​ ​ (11,661) ​ (15,421) ​ Global revolving credit facilities, net ​ ​ ​ 234,105 ​ 1,647,735 ​ Unsecured Term Loans ​ ​ ​ ​ ​ 2019 Term Loan Base Rate + 1.000 % ​ Jan 19, 2019 ​ — ​ 375,000 ​ 2023 Term Loan Various (3)(4) ​ Jan 15, 2023 ​ 300,000 (5) 300,000 (5) 2024 Term Loan Various (3)(4) ​ Jan 24, 2023 ​ 513,205 (5) 508,120 (5) Deferred financing costs, net ​ ​ ​ ​ (2,986) ​ (4,216) ​ Unsecured term loans, net ​ ​ ​ ​ 810,219 ​ 1,178,904 ​ Unsecured senior notes: ​ ​ ​ ​ ​ ​ Floating rate notes due 2019 EURIBOR + 0.500 % ​ May 22, 2019 ​ — (11) 143,338 (6) 5.875% notes due 2020 5.875 % ​ Feb 1, 2020 ​ — (8) 500,000 ​ 3.400% notes due 2020 3.400 % ​ Oct 1, 2020 ​ — (12) 500,000 ​ 5.250% notes due 2021 5.250 % ​ Mar 15, 2021 ​ — (12) 400,000 ​ 3.950% notes due 2022 3.950 % ​ Jul 1, 2022 ​ 500,000 ​ 500,000 ​ 3.625% notes due 2022 3.625 % ​ Oct 1, 2022 ​ 300,000 ​ 300,000 ​ 2.750% notes due 2023 2.750 % ​ Feb 1, 2023 ​ 350,000 ​ 350,000 ​ 4.750% notes due 2023 4.750 % ​ Oct 13, 2023 ​ 397,710 (7) 382,620 (7) 2.625% notes due 2024 2.625 % ​ Apr 15, 2024 ​ 672,780 (6) 688,020 (6) 2.750% notes due 2024 2.750 % ​ Jul 19, 2024 ​ 331,425 (7) 318,850 (7) 4.250% notes due 2025 4.250 % ​ Jan 17, 2025 ​ 530,280 (7) 510,160 (7) 4.750% notes due 2025 4.750 % ​ Oct 1, 2025 ​ 450,000 ​ 450,000 ​ 2.500% notes due 2026 ​ 2.500 % ​ Jan 16, 2026 ​ ​ 1,205,398 (6) ​ — ​ 3.700% notes due 2027 3.700 % ​ Aug 15, 2027 ​ 1,000,000 ​ 1,000,000 ​ 1.125% notes due 2028 ​ 1.125 % ​ Apr 9, 2028 ​ ​ 560,650 (6) ​ — ​ 4.450% notes due 2028 4.450 % ​ Jul 15, 2028 ​ 650,000 ​ 650,000 ​ 3.600% notes due 2029 ​ 3.600 % ​ Jul 1, 2029 ​ ​ 900,000 ​ ​ — ​ 3.300% notes due 2029 3.300 % ​ Jul 19, 2029 ​ 463,995 (7) 446,390 (7) 3.750% notes due 2030 3.750 % ​ Oct 17, 2030 ​ 729,135 (7)(9) 510,160 (7) Unamortized discounts, net of premiums ​ ​ (16,145) ​ (19,859) ​ Total senior notes, net of discount ​ ​ 9,025,228 ​ 7,629,679 ​ Deferred financing costs, net ​ ​ (52,038) ​ (40,553) ​ Total unsecured senior notes, net of discount and deferred financing costs ​ ​ 8,973,190 ​ 7,589,126 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Secured Debt: ​ ​ ​ ​ 731 East Trade Street 8.22 % ​ Jul 1, 2020 ​ $ 1,089 ​ $ 1,776 ​ Secured note due March 2023 LIBOR + 1.000 % (4) ​ Mar 1, 2023 ​ 104,000 ​ 104,000 ​ Secured note due December 2023 Base Rate + 4.250 % ​ Dec 20, 2023 ​ — (10) 600,000 ​ Unamortized net premiums ​ ​ 54 ​ 148 ​ Total secured debt, including premiums ​ ​ 105,143 ​ 705,924 ​ Deferred financing costs, net ​ ​ (209) ​ (20,210) ​ Total secured debt, including premiums and net of deferred financing costs ​ ​ 104,934 ​ 685,714 ​ Total indebtedness ​ ​ $ 10,122,448 ​ $ 11,101,479 ​ (1) The interest rate for borrowings under the global revolving credit facility equals the applicable index plus a margin of 90 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. The interest rate for borrowings under the Yen revolving credit facility equals the applicable index plus a margin of 50 basis points, which is based on the current credit ratings of our long-term debt. (2) Balances as of December 31, 2019 and December 31, 2018 are as follows (balances, in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of Weighted- Balance as of Weighted- ​ ​ December 31, ​ average ​ December ​ average Denomination of Draw ​ 2019 ​ interest rate ​ 31, 2018 ​ interest rate Floating Rate Borrowing (a) (d) ​ ​ ​ U.S. dollar ($) ​ $ — ​ — % $ 890,000 ​ 3.37 % British pound sterling (£) ​ — ​ — % 8,290 (c) 1.61 % Euro (€) ​ 44,852 (b) 0.90 % 451,800 (c) 0.90 % Australian dollar (AUD) ​ 1,264 (b) 1.74 % 27,632 (c) 2.82 % Hong Kong dollar (HKD) ​ — ​ — % 8,797 (c) 3.14 % Japanese yen (JPY) ​ — ​ — % 4,105 (c) 0.90 % Singapore dollar (SGD) ​ 53,199 (b) 2.46 % 77,112 (c) 2.79 % Canadian dollar (CAD) ​ — ​ — % 60,856 (c) 3.16 % Total ​ $ 99,315 1.75 % $ 1,528,592 2.57 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Yen Revolving Credit Facility (a) ​ $ 146,451 (e) 0.50 % $ 134,564 (e) 0.50 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total borrowings ​ $ 245,766 1.00 % $ 1,663,156 2.41 % (a) The interest rates for floating rate borrowings under the global revolving credit facility currently equal the applicable index plus a margin of 90 basis points, which is based on the credit rating of our long-term debt. The interest rate for borrowings under the Yen revolving credit facility equals the applicable index plus a margin of 50 basis points, which is based on the current credit rating of our long-term debt. (b) Based on exchange rates of $1.12 to €1.00, $0.70 to 1.00 AUD and $0.74 to 1.00 SGD, respectively, as of December 31, 2019. (c) Based on exchange rates of $1.28 to £1.00, $1.15 to €1.00, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.73 to 1.00 SGD and $0.73 to 1.00 CAD, respectively, as of December 31, 2018. (d) As of December 31, 2019, approximately $45.2 million of letters of credit were issued. (e) Based on exchange rates of $0.01 to 1.00 JPY for December 31, 2019 and 2018. (3) Interest rates are based on our current senior unsecured debt ratings and is currently 100 basis points over the applicable index for floating rate advances for the 2023 Term Loan and the 2024 Term Loan. (4) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by a portion of U.S. dollar and Canadian dollar borrowings under the 2023 Term Loan and 2024 Term Loan, and the secured note due March 2023. See Note 16. "Derivative Instruments" for further information. (5) Balances as of December 31, 2019 and December 31, 2018 are as follows (balances, in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ Weighted- ​ Balance as of ​ Weighted- ​ ​ ​ December 31, ​ average ​ December 31, ​ average ​ Denomination of Draw 2019 interest rate 2018 interest rate U.S. dollar ($) ​ $ 300,000 2.74 % (b) $ 300,000 3.46 % (d) Singapore dollar (SGD) ​ 147,931 (a) 2.68 % ​ 146,080 (c) 2.76 % Australian dollar (AUD) ​ 203,820 (a) 1.85 % ​ 204,632 (c) 2.94 % Hong Kong dollar (HKD) ​ 85,629 (a) 3.60 % ​ 85,188 (c) 3.32 % Canadian dollar (CAD) ​ 75,825 (a) 3.00 % (b) ​ 72,220 (c) 3.24 % (d) Total ​ $ 813,205 2.62 % (b) $ 808,120 3.17 % (d) (a) Based on exchange rates of $0.74 to 1.00 SGD, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD and $0.77 to 1.00 CAD, respectively, as of December 31, 2019. (b) As of December 31, 2019, the weighted-average interest rate reflecting interest rate swaps was 2.44% (U.S. dollar), 1.78% (Canadian dollar) and 2.39% (Total). See Note 16 for further discussion on interest rate swaps. (c) Based on exchange rates of $0.73 to 1.00 SGD, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD and $0.73 to 1.00 CAD, respectively, as of December 31, 2018. (d) As of December 31, 2018, the weighted-average interest rate reflecting interest rate swaps was 2.44% (U.S. dollar), 1.78% (Canadian dollar) and 2.66% (Total). See Note 16 for further discussion on interest rate swaps. ​ (6) Based on exchange rates of $1.12 to €1.00 as of December 31, 2019 and $1.15 to €1.00 as of December 31, 2018. (7) Based on exchange rates of $1.33 to £1.00 as of December 31, 2019 and $1.28 to £1.00 as of December 31, 2018. (8) The 5.875% 2020 Notes were paid in full in January 2019 (by tender offer) and February 2019 (by redemption of the remaining balance after the tender offer). The tender offer and redemption resulted in an early extinguishment charge of approximately $12.9 million during the three months ended March 31, 2019. (9) On March 5, 2019, Digital Stout Holding, LLC, a wholly owned subsidiary of the Operating Partnership, issued and sold an additional £150.0 million aggregate principal amount of 2030 Notes. The terms of the 2030 Notes are governed by an indenture, dated as of October 17, 2018, among Digital Stout Holding, LLC, Digital Realty Trust, Inc., the Operating Partnership, Deutsche Trustee Company Limited, as trustee, Deutsche Bank AG, London Branch, as paying agent and a transfer agent, and Deutsche Bank Luxembourg S.A., as registrar and a transfer agent (the “GBP Notes Indenture”), pursuant to which Digital Stout Holding, LLC previously issued £400.0 million in aggregate principal amount of its 2030 Notes. The 2030 Notes are treated as a single series with the notes previously issued under the GBP Notes Indenture. (10) The debt was deconsolidated as a result of the Ascenty joint venture formed with Brookfield. (11) Paid in full at maturity in May 2019. (12) The 3.400% 2020 Notes and 2021 Notes were paid in full in June 2019 (by tender offer) and July 2019 (by redemption of the remaining balances after the tender offer). The tender offer resulted in an early extinguishment charge of approximately $26.3 million during the year ended December 31, 2019. ​ Global Revolving Credit Facilities On October 24, 2018, we refinanced our global revolving credit facility and entered into a global senior credit agreement for a $2.35 billion senior unsecured revolving credit facility, which we refer to as the 2018 global revolving credit facility, that replaced the $2.0 billion revolving credit facility executed on January 15, 2016. In addition, we have the ability from time to time to increase the size of the global revolving credit facility and the unsecured term loans (discussed below), in any combination, by up to $1.25 billion, subject to the receipt of lender commitments and other conditions precedent. The 2018 global revolving credit facility matures on January 24, 2023, with two six-month extension options available. The interest rate for borrowings under the 2018 global revolving credit facility equals the applicable index plus a margin which is based on the credit ratings of our long-term debt and is currently 90 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. The 2018 global revolving credit facility provides for borrowings in U.S., Canadian, Singapore, Australian and Hong Kong dollars, as well as Euro, British pound sterling and Japanese yen and includes the ability to add additional currencies in the future. As of December 31, 2019, interest rates are based on 1-month EURIBOR, 1-month HIBOR, 1-month SOR and 1-month CDOR, plus a margin of 0.90%. We have used and intend to use available borrowings under the 2018 global revolving credit facility to acquire additional properties, 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. The 2018 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 2018 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 December 31, 2019, we were in compliance with all of such covenants. On October 24, 2018, we entered into a credit agreement for a ¥33.3 billion (approximately $296.5 million based on the exchange rate on October 24, 2018) senior unsecured revolving credit facility, which we refer to as the Yen revolving credit facility. The Yen revolving credit facility provides for borrowings in Japanese yen. In addition, we have the ability from time to time to increase the size of the Yen revolving credit facility to up to ¥93.3 billion (approximately $831.1 million based on the exchange rate on October 24, 2018), subject to receipt of lender commitments and other conditions precedent. The Yen revolving credit facility matures on January 24, 2024. The interest rate for borrowings under the Yen revolving credit facility equals the applicable index plus a margin which is based on the credit ratings of our long-term debt and is currently 50 basis points. A quarterly unused commitment fee, which is calculated using the average daily unused revolving credit commitment, is based on the credit ratings of our long-term debt, and is currently 10 basis points. The Yen 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 Yen 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 December 31, 2019, we were in compliance with all of such covenants. Unsecured Term Loans On October 24, 2018, we refinanced our senior unsecured multi-currency term loan facility and entered into an amended and restated term loan agreement, which we refer to as the 2018 term loan agreement, which governs (i) a $300.0 million 5-year senior unsecured term loan, which we refer to as the 2023 Term Loan, and (ii) an approximately $512 million 5-year senior unsecured term loan, which we refer to as the 2024 Term Loan. The 2018 term loan agreement replaced the $1.55 billion term loan agreement executed on January 15, 2016. The 2023 Term Loan matures on January 15, 2023 and the 2024 Term Loan matures on January 24, 2023 with two six-month extension options. In addition, we have the ability from time to time to increase the aggregate size of lending under the 2018 term loan agreement and the 2018 global revolving credit facility (discussed above), in any combination, by up to $1.25 billion, subject to receipt of lender commitments and other conditions precedent. Interest rates are based on our senior unsecured debt ratings and are currently 100 basis points over the applicable index for floating rate advances for the 2023 Term Loan and the 2024 Term Loan. Funds may be drawn in U.S., Canadian, Singapore, Australian and Hong Kong dollars. Based on exchange rates in effect at December 31, 2019, the balance outstanding is approximately $0.8 billion, excluding deferred financing costs. We have used borrowings under the term loans for acquisitions, repayment of indebtedness, development, working capital and general corporate purposes. The covenants under the 2023 Term Loan and 2024 Term Loan are consistent with our 2018 global revolving credit facility and, as of December 31, 2019, we were in compliance with all of such covenants. Unsecured Senior Notes ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Issued (in ​ ​ ​ ​ ​ ​ ​ Unsecured Senior Notes and Annual ​ ​ ​ Maturity ​ millions, local ​ Net Proceeds ​ Interest Payment ​ ​ Interest Rate ​ Date Issued ​ Date ​ currency) ​ (in millions) (1) ​ Dates ​ Initial Issuer (2) 3.950% Notes due 2022 ​ Jun 23, 2015 ​ Jul 1, 2022 ​ $ 500.0 ​ 491.8 Semi-annually, commencing January 1, 2016 Digital Realty Trust, L.P. 3.625% Notes due 2022 ​ Sep 24, 2012 ​ Oct 1, 2022 ​ $ 300.0 ​ 293.1 Semi-annually, commencing April 1, 2013 Digital Realty Trust, L.P. 2.750% Notes due 2023 ​ Aug 7, 2017 ​ Feb 1, 2023 ​ $ 350.0 ​ 346.9 Semi-annually, commencing February 1, 2018 Digital Realty Trust, L.P. 4.750% Notes due 2023 ​ Apr 1, 2014 ​ Oct 13, 2023 ​ £ 300.0 ​ 490.9 Semi-annually, commencing October 13, 2014 Digital Stout Holding, LLC (3) 2.625% Notes due 2024 ​ Apr 15, 2016 ​ Apr 15, 2024 ​ € 600.0 ​ 670.3 Annually, commencing April 15, 2017 Digital Euro Finco, LLC (3) 2.750% Notes due 2024 ​ Jul 21, 2017 ​ Jul 19, 2024 ​ £ 250.0 ​ 321.3 Annually, commencing July 19, 2018 Digital Stout Holding, LLC (3) 4.250% Notes due 2025 ​ Jan 18, 2013 ​ Jan 17, 2025 ​ £ 400.0 ​ 624.2 Semi-annually, commencing July 17, 2013 Digital Stout Holding, LLC (3) 4.750% Notes due 2025 ​ Oct 1, 2015 ​ Oct 1, 2025 ​ $ 450.0 ​ 445.8 Semi-annually, commencing April 1, 2016 Digital Delta Holdings, LLC (4) 2.500% Notes due 2026 ​ Jan 16, 2019 ​ Jan 16, 2026 ​ € 1,075.0 ​ ​ 1,218.6 ​ Annually, commencing January 16, 2020 ​ Digital Euro Finco, LLC (3) 3.700% Notes due 2027 ​ Aug 7, 2017 ​ Aug 15, 2027 ​ $ 1,000.0 ​ 991.0 Semi-annually, commencing February 15, 2018 Digital Realty Trust, L.P. 1.125% Notes due 2028 ​ Oct 9, 2019 ​ Apr 9, 2028 ​ € 500.0 ​ ​ 539.7 ​ Annually, commencing April 9, 2020 ​ Digital Euro Finco, LLC (3) 4.450% Notes due 2028 ​ Jun 21, 2018 ​ Jul 15, 2028 ​ $ 650.0 ​ 643.3 Semi-annually, commencing January 15, 2019 Digital Realty Trust, L.P. 3.600% Notes due 2029 ​ Jun 14, 2019 ​ Jul 1, 2029 ​ $ 900.0 ​ ​ 890.6 ​ Semi-annually, commencing January 1, 2020 ​ Digital Realty Trust, L.P. 3.300% Notes due 2029 ​ Jul 21, 2017 ​ Jul 19, 2029 ​ £ 350.0 ​ 448.6 Annually, commencing July 19, 2018 Digital Stout Holding, LLC (3) 3.750% Notes due 2030 ​ Oct 17, 2018 and Mar 9, 2019 ​ Oct 17, 2030 ​ £ 550.0 ​ 716.8 Annually, commencing October 17, 2019 Digital Stout Holding, LLC (3) (1) Amounts are in U.S. dollars, based on the exchange rate on the date of issuance. Net proceeds are equal to principal amount less initial purchaser discount and other debt issuance costs. (2) Digital Realty Trust, Inc. guarantees the senior notes issued by Digital Realty Trust, L.P. Both Digital Realty Trust, L.P. and Digital Realty Trust, Inc. guarantee the senior notes issued by Digital Stout Holding, LLC and Digital Euro Finco, LLC. (3) A wholly owned subsidiary of Digital Realty Trust, L.P. (4) Initially a wholly owned subsidiary of Digital Realty Trust, Inc., pursuant to the terms of the indenture, following the consummation of the Telx Acquisition, on October 13, 2015, Digital Delta Holdings, LLC merged with and into Digital Realty Trust, L.P., with Digital Realty Trust, L.P. surviving the merger and assuming Digital Delta Holdings, LLC’s obligations under the 4.750% 2025 Notes, the related indenture and registration rights agreement by operation of law. ​ The indentures governing each of the senior notes contain 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 December 31, 2019, we were in compliance with each of these financial covenants. The table below summarizes our debt maturities and principal payments as of December 31, 2019 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Global Revolving ​ Unsecured ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit Facilities (1) Term Loans (1) Senior Notes Secured Debt Total Debt 2020 ​ $ — ​ $ — ​ $ — ​ $ 1,089 ​ $ 1,089 2021 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 2022 ​ ​ — ​ ​ — ​ ​ 800,000 ​ ​ — ​ ​ 800,000 2023 ​ 99,315 ​ 813,205 ​ 747,710 ​ 104,000 ​ 1,764,230 2024 ​ 146,451 ​ — ​ 1,004,205 ​ — ​ 1,150,656 Thereafter ​ — ​ — ​ 6,489,458 ​ — ​ 6,489,458 Subtotal ​ $ 245,766 ​ $ 813,205 ​ $ 9,041,373 ​ $ 105,089 ​ $ 10,205,433 Unamortized discount ​ — ​ — ​ (22,554) ​ — ​ (22,554) Unamortized premium ​ — ​ — ​ 6,409 ​ 54 ​ 6,463 Total ​ $ 245,766 ​ $ 813,205 ​ $ 9,025,228 ​ $ 105,143 ​ $ 10,189,342 (1) The global revolving credit facility and unsecured term loans are 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 or unsecured term loans, as applicable. ​

Income per Share

Income per Share	12 Months Ended
	Dec. 31, 2019
Income per Share
Income per Share	10. Income per Share The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Net income available to common stockholders $ 493,011 ​ $ 249,930 ​ $ 173,148 Weighted average shares outstanding—basic 208,325,823 ​ 206,035,408 ​ 174,059,386 Potentially dilutive common shares: ​ ​ Unvested incentive units 165,185 ​ 141,260 ​ 141,136 Forward equity offering 813,073 ​ 33,315 ​ 124,527 Market performance-based awards 158,166 ​ 463,488 ​ 570,049 Weighted average shares outstanding—diluted 209,462,247 ​ 206,673,471 ​ 174,895,098 Income per share: ​ ​ Basic $ 2.37 ​ $ 1.21 ​ $ 0.99 Diluted $ 2.35 ​ $ 1.21 ​ $ 0.99 ​ We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 9,087,726 8,227,463 3,996,550 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock 1,695,765 1,876,584 540,773 Potentially dilutive Series F Cumulative Redeemable Preferred Stock — — 463,301 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 2,102,655 2,326,861 2,261,153 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 789,846 3,409,772 3,313,484 Potentially dilutive Series I Cumulative Redeemable Preferred Stock 2,105,116 2,329,584 2,263,799 Potentially dilutive Series J Cumulative Redeemable Preferred Stock 1,679,534 1,858,622 720,803 Potentially dilutive Series K Cumulative Redeemable Preferred Stock 1,334,691 ​ — ​ — Potentially dilutive Series L Cumulative Redeemable Preferred Stock 670,823 ​ — ​ — Total 19,466,156 20,028,886 13,559,863 ​

Income per Unit

Income per Unit	12 Months Ended
	Dec. 31, 2019
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Income per Unit	11. Income per Unit The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Net income available to common unitholders $ 514,111 ​ $ 260,110 ​ $ 176,918 Weighted average units outstanding—basic 217,284,755 ​ 214,312,871 ​ 178,055,936 Potentially dilutive common units: ​ ​ Unvested incentive units 165,185 ​ 141,260 ​ 141,136 Forward equity offering 813,073 ​ 33,315 ​ 124,527 Market performance-based awards 158,166 ​ 463,488 ​ 570,049 Weighted average units outstanding—diluted 218,421,179 ​ 214,950,934 ​ 178,891,648 Income per unit: ​ ​ Basic $ 2.37 ​ $ 1.21 ​ $ 0.99 Diluted $ 2.35 ​ $ 1.21 ​ $ 0.99 ​ We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units 1,695,765 1,876,584 540,773 Potentially dilutive Series F Cumulative Redeemable Preferred Units — — 463,301 Potentially dilutive Series G Cumulative Redeemable Preferred Units 2,102,655 2,326,861 2,261,153 Potentially dilutive Series H Cumulative Redeemable Preferred Units 789,846 3,409,772 3,313,484 Potentially dilutive Series I Cumulative Redeemable Preferred Units 2,105,116 2,329,584 2,263,799 Potentially dilutive Series J Cumulative Redeemable Preferred Units 1,679,534 1,858,622 720,803 Potentially dilutive Series K Cumulative Redeemable Preferred Units 1,334,691 ​ — ​ — Potentially dilutive Series L Cumulative Redeemable Preferred Units 670,823 ​ — ​ — Total 10,378,430 11,801,423 9,563,313 ​

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Taxes
Income Taxes	12. 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 taxable income distributed currently to its stockholders. Since inception, Digital Realty Trust, Inc. has distributed at least 100% of its taxable income annually. As such, no provision for federal income taxes has been included in the accompanying consolidated financial statements for the years ended December 31, 2019, 2018 and 2017. 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 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 years ended December 31, 2019, 2018 and 2017. For our TRS entities and foreign subsidiaries that are subject to U.S. federal, state, local 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 years ended December 31, 2019, 2018 and 2017. As of December 31, 2019 and 2018, we had deferred tax liabilities net of deferred tax assets of approximately $143.4 million and $146.6 million, respectively, primarily related to our foreign properties, classified in accounts payable and other accrued expenses in the consolidated balance sheet. 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 and the European portfolio acquisition in July 2016. The valuation allowance against the deferred tax assets at December 31, 2019 and 2018 relate primarily to net operating loss carryforwards that we do not expect to utilize attributable to certain foreign jurisdictions. Deferred income tax assets and liabilities as of December 31, 2019 and 2018 were as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ 2019 2018 Gross deferred income tax assets: ​ ​ ​ ​ Net operating loss carryforwards ​ $ 63,280 ​ $ 71,656 Basis difference - real estate property ​ 9,955 ​ 8,490 Basis difference - intangibles ​ 1,071 ​ 256 Other - temporary differences ​ 19,028 ​ 24,341 Total gross deferred income tax assets ​ 93,334 ​ 104,743 Valuation allowance ​ (40,795) ​ (51,439) Total deferred income tax assets, net of valuation allowance ​ 52,539 ​ 53,304 Gross deferred income tax liabilities: ​ ​ Basis difference - real estate property ​ 162,095 ​ 164,077 Basis difference - equity investments ​ ​ 4,000 ​ ​ — Basis difference - intangibles ​ 1,547 ​ 6,855 Straight-line rent ​ 8,044 ​ 5,340 Other - temporary differences ​ 20,218 ​ 23,584 Total gross deferred income tax liabilities ​ 195,904 ​ 199,856 Net deferred income tax liabilities ​ $ 143,365 ​ $ 146,552 ​ The federal tax legislation enacted in December 2017, commonly known as the Tax Cuts and Jobs Act (the “TCJA”), reduced the corporate federal tax rate in the U.S. to 21%, generally effective on January 1, 2018. As such, deferred tax assets and liabilities were remeasured using the lower corporate federal tax rate at December 31, 2017. While we do not expect other material impacts, the new tax rules are complex and, in some respects, lack developed administrative guidance. We continue to work with our tax advisors to analyze and determine the full impact that the TCJA as a whole will have on us.

Equity and Accumulated Other Co

Equity and Accumulated Other Comprehensive Loss, Net	12 Months Ended
	Dec. 31, 2019
Equity and Accumulated Other Comprehensive Loss, Net
Equity and Accumulated Other Comprehensive Loss, Net	13. Equity and Accumulated Other Comprehensive Loss, Net (a) Equity Distribution Agreements On January 4, 2019, Digital Realty Trust, Inc. and Digital Realty Trust, L.P. entered into equity distribution agreements, which we refer to as the 2019 Equity Distribution Agreements, with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Barclays Capital Inc., BTIG, LLC, Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc., J.P. Morgan Securities LLC, Mizuho Securities USA LLC, Morgan Stanley & Co. LLC, MUFG Securities Americas Inc., PNC Capital Markets LLC, Raymond James & Associates, Inc., RBC Capital Markets, LLC, Scotia Capital (USA) Inc., SMBC Nikko Securities America, Inc., SunTrust Robinson Humphrey, Inc., TD Securities (USA) LLC, and Wells Fargo Securities, LLC, or the Agents, under which it could issue and sell shares of its common stock having an aggregate offering price of up to $1.0 billion from time to time through, at its discretion, any of the Agents as its sales agents or as principals. Sales may also be made on a forward basis pursuant to separate forward sale agreements. The sales of common stock made under the 2019 Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act. To date, no sales have been made under the program. (b) Forward Equity Sale On September 27, 2018, Digital Realty Trust, Inc. completed an underwritten public offering of 9,775,000 shares of its common stock (including 1,275,000 shares from the exercise in full of the underwriters’ option to purchase additional shares), 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 an aggregate of 9,775,000 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 its common stock by the forward purchasers in the public offering. The Company expects to receive net proceeds of approximately $1.1 billion (net of fees and estimated expenses) upon full physical settlement of the forward sale agreements. On September 17, 2019, the Company amended the forward sale agreements to extend the maturity date of such forward sales agreements from September 27, 2019 to September 25, 2020. (c) Redeemable Preferred Stock ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liquidation ​ Annual ​ Shares Outstanding as of ​ Balance (in thousands, net of ​ ​ Date(s) ​ Initial Date to ​ ​ ​ Value (in ​ Dividend ​ December 31, ​ issuance costs) as of December 31, Preferred Stock (1) Issued Redeem (2) Share Cap (3) thousands) (4) Rate (5) 2019 2018 2019 2018 6.625% Series C Cumulative Redeemable Perpetual Preferred Stock ​ Sep 14, 2017 ​ May 15, 2021 0.6389035 ​ $ 201,250 ​ $ 1.65625 8,050,000 8,050,000 ​ $ 219,250 ​ $ 219,250 5.875% Series G Cumulative Redeemable Preferred Stock ​ Apr 9, 2013 ​ Apr 9, 2018 0.7532000 ​ 250,000 ​ 1.46875 10,000,000 10,000,000 ​ 241,468 ​ 241,468 7.375% Series H Cumulative Redeemable Preferred Stock ​ Mar 26, 2014 ​ Mar 26, 2019 0.9632000 ​ — ​ 1.84375 — 14,600,000 ​ — ​ 353,290 6.350% Series I Cumulative Redeemable Preferred Stock ​ Aug 24, 2015 ​ Aug 24, 2020 0.7623100 ​ 250,000 ​ 1.58750 10,000,000 10,000,000 ​ 242,012 ​ 242,012 5.250% Series J Cumulative Redeemable Preferred Stock ​ Aug 7, 2017 ​ Aug 7, 2022 0.4252100 ​ 200,000 ​ 1.31250 8,000,000 8,000,000 ​ 193,540 ​ 193,540 5.850% Series K Cumulative Redeemable Preferred Stock ​ Mar 13, 2019 ​ Mar 13, 2024 ​ 0.4361100 ​ ​ 210,000 ​ ​ 1.46250 ​ 8,400,000 ​ — ​ ​ 203,264 ​ ​ — 5.200% Series L Cumulative Redeemable Preferred Stock ​ Oct 10, 2019 ​ Oct 10, 2024 ​ 0.3851800 ​ ​ 345,000 ​ ​ 1.30000 ​ 13,800,000 ​ — ​ ​ 334,886 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ $ 1,456,250 ​ ​ ​ 58,250,000 50,650,000 ​ $ 1,434,420 ​ $ 1,249,560 (1) All series of preferred stock do not have a stated maturity date and are not subject to any sinking fund or mandatory redemption provisions. Upon liquidation, dissolution or winding up, each series of preferred stock will rank senior to Digital Realty Trust, Inc. common stock and on parity with the other series of preferred stock. Holders of each series of 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. (2) Except in limited circumstances, reflects earliest date that Digital Realty Trust, Inc. may exercise its option to redeem the preferred stock, at a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but excluding the date of redemption. (3) 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 preferred stock will have the right (unless, prior to the change of control conversion date specified in the applicable Articles Supplementary governing the preferred stock, Digital Realty Trust, Inc. has provided or provides notice of its election to redeem the preferred stock) to convert some or all of the preferred stock held by it into a number of shares of Digital Realty Trust, Inc.’s common stock per share of preferred stock to be converted equal to the lesser of (i) the quotient obtained by dividing (a) 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 preferred stock dividend payment and prior to the corresponding dividend payment date, in which case no additional amount for such accrued and unpaid dividend will be included in this sum) by (b) the common stock price specified in the applicable Articles Supplementary governing the preferred stock; and (ii) the Share Cap, subject to certain adjustments; subject, in each case, to provisions for the receipt of alternative consideration as described in the applicable Articles Supplementary governing the preferred stock. Except in connection with specified change of control transactions, the preferred stock is not convertible into or exchangeable for any other property or securities of Digital Realty Trust, Inc. (4) Liquidation preference is $25.00 per share. (5) Dividends on preferred shares are cumulative and payable quarterly in arrears. (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 interest in the Operating Partnership as of December 31, 2019 and 2018: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ December 31, 2018 ​ ​ Number of ​ Percentage of ​ Number of ​ Percentage of ​ ​ units total units total Digital Realty Trust, Inc. ​ 208,900,758 ​ 95.9 % 206,425,656 ​ 95.1 % Noncontrolling interests consist of: ​ ​ ​ Common units held by third parties 6,820,201 3.1 % 6,297,272 2.9 % Issuance of units in connection with Ascenty Acquisition — — % 2,338,874 1.1 % Incentive units held by employees and directors (see Note 15) 2,022,954 0.9 % 1,944,738 0.9 % ​ 217,743,913 100.0 % 217,006,540 100.0 % ​ 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 units and incentive units of the Operating Partnership met the criteria to be classified within equity, except for certain common units issued to certain former DFT Operating Partnership unitholders in the DFT Merger, which are subject to certain restrictions and, accordingly, are not presented as permanent equity in the consolidated balance sheet. In connection with the initial public offering of DFT in 2007, DFT, the DFT Operating Partnership and certain DFT Operating Partnership unitholders entered into a tax protection agreement to assist such unitholders in deferring certain U.S. federal income tax liabilities that may have otherwise resulted from the contribution transactions undertaken in connection with the initial public offering and the ownership of interests in the DFT Operating Partnership and to set forth certain agreements with respect to other tax matters. In connection with the DFT Merger, certain DFT Operating Partnership unitholders entered into a new tax protection agreement with Digital Realty Trust, Inc. and the Operating Partnership that replaced and superseded the DFT tax protection agreement, effective as of the closing of the merger. Pursuant to the new tax protection agreement, such DFT Operating Partnership unitholders entered into a guarantee of certain debt of a subsidiary of the Operating Partnership. The Operating Partnership must offer such DFT Operating Partnership unitholders a new guarantee opportunity in the event any guaranteed debt is repaid prior to March 1, 2023. If the Operating Partnership fails to offer the guarantee opportunity or to allocate guaranteed debt to any such DFT Operating Partnership unitholder as required under the new tax protection agreement, the Operating Partnership generally would be required to indemnify each such DFT Operating Partnership unitholder for the tax liability resulting from such failure, as determined under the new tax protection agreement. The redemption value of the noncontrolling Operating Partnership common units and the vested incentive units was approximately $997.6 million and $1,076.9 million based on the closing market price of Digital Realty Trust, Inc. common stock on December 31, 2019 and 2018, respectively. The following table shows activity for the noncontrolling interests in the Operating Partnership for the years ended December 31, 2019, 2018 and 2017: ​ ​ ​ ​ ​ ​ ​ ​ Common Units Incentive Units Total As of December 31, 2016 ​ 1,141,814 1,333,849 2,475,663 Common units issued in connection with the DFT Merger 6,111,770 — 6,111,770 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (354,490) — (354,490) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) ​ — (208,092) (208,092) Incentive units issued upon achievement of market performance condition — 390,795 390,795 Grant of incentive units to employees and directors — 73,449 73,449 As of December 31, 2017 6,899,094 1,590,001 8,489,095 Common units issued in connection with the Ascenty Acquisition 2,338,874 — 2,338,874 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (601,822) — (601,822) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) ​ — (110,070) (110,070) Incentive units issued upon achievement of market performance condition — 357,956 357,956 Grant of incentive units to employees and directors — 128,986 128,986 Cancellation / forfeitures of incentive units held by employees and directors — (22,135) (22,135) As of December 31, 2018 8,636,146 1,944,738 10,580,884 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (1,815,945) — (1,815,945) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) — (338,515) (338,515) Incentive units issued upon achievement of market performance condition — 319,279 319,279 Grant of incentive units to employees and directors — 120,368 120,368 Cancellation / forfeitures of incentive units held by employees and directors — (22,916) (22,916) As of December 31, 2019 6,820,201 2,022,954 8,843,155 (1) These redemptions and conversions were 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 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 years ended December 31, 2019, 2018 and 2017 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Series C ​ Series F ​ Series G ​ Series H ​ Series I ​ Series J ​ Series K ​ Series L ​ ​ ​ ​ ​ ​ ​ ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ ​ Common ​ Date dividend declared Dividend payment date Stock Stock Stock Stock Stock Stock Stock Stock ​ ​ Stock ​ March 1, 2017 ​ March 31, 2017 ​ $ — $ 3,023 ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ — ​ $ — ​ $ — ​ ​ $ 148,358 (1) May 8, 2017 ​ June 30, 2017 ​ — — (2) 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ ​ 150,814 (1) August 7, 2017 ​ September 29, 2017 ​ — — 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ ​ 191,041 (1) November 2, 2017 ​ December 29, 2017 for Preferred Stock; January 12, 2018 for Common Stock ​ 3,963 (3) — ​ 3,672 6,730 ​ 3,969 ​ 4,200 (3) — ​ — ​ ​ 191,067 (1) ​ ​ ​ $ 3,963 $ 3,023 $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 4,200 ​ $ — ​ $ — ​ ​ $ 681,280 March 1, 2018 ​ March 30, 2018 ​ $ 3,333 $ — $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ ​ $ 208,015 (4) May 8, 2018 ​ June 29, 2018 ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,071 (4) August 14, 2018 ​ September 28, 2018 ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,166 (4) November 12, 2018 ​ December 31, 2018 for Preferred Stock; January 15, 2019 for Common Stock ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,415 (4) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 10,500 ​ $ — ​ $ — ​ ​ $ 832,667 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ February 21, 2019 ​ March 29, 2019 ​ $ 3,333 ​ ​ — ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ ​ $ 224,802 (5) May 13, 2019 ​ June 28, 2019 ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — (6) ​ 3,969 ​ ​ 2,625 ​ ​ 3,686 (7) ​ — ​ ​ ​ 224,895 (5) August 13, 2019 ​ September 30, 2019 ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — ​ ​ 3,969 ​ ​ 2,625 ​ ​ 3,071 ​ ​ — ​ ​ ​ 225,188 (5) November 19, 2019 ​ December 31, 2019 for Preferred Stock; January 15, 2020 for Common Stock ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — ​ ​ 3,969 ​ ​ 2,625 ​ ​ 3,071 ​ ​ 4,036 (8) ​ ​ 225,488 (5) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 6,730 ​ $ 15,876 ​ $ 10,500 ​ $ 9,828 ​ $ 4,036 ​ ​ $ 900,373 ​ Annual rate of dividend per share ​ ​ $ 1.65625 $ 1.65625 $ 1.46875 ​ $ 1.84375 ​ $ 1.58750 ​ $ 1.31250 ​ $ 1.46250 ​ $ 1.30000 ​ ​ (1) $3.720 annual rate of dividend per share. (2) Redeemed on April 5, 2017 for $25.01840 per share, or a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but not including the redemption date of approximately $0.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $6.3 million were recorded as a reduction to net income available to common stockholders. (3) Represents a pro rata dividend from and including the original issue date to and including December 31, 2017. (4) $4.040 annual rate of dividend per share. (5) $4.320 annual rate of dividend per share. (6) Redeemed on April 1, 2019 for $25.00 per share, or a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but not including the redemption date. In connection with the redemption, the previously incurred offering costs of approximately $11.8 million were recorded as a reduction to net income available to common stockholders. (7) Represents a pro rata dividend from and including the original issue date to and including June 30, 2019. (8) Represents a pro rata dividend from and including the original issue date to and including December 31, 2019. ​ 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 (Loss), Net The accumulated balances for each item within other comprehensive income (loss), net are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign currency ​ Cash flow ​ Foreign currency net ​ Accumulated other ​ ​ translation ​ hedge ​ investment hedge ​ comprehensive ​ adjustments adjustments adjustments income (loss), net Balance as of December 31, 2017 ​ $ (147,370) ​ $ 13,200 ​ $ 25,738 ​ $ (108,432) Net current period change ​ (11,279) ​ 7,890 ​ — ​ (3,389) Reclassification to interest expense from interest rate swaps ​ — ​ (3,826) ​ — ​ (3,826) Balance as of December 31, 2018 ​ $ (158,649) ​ $ 17,264 ​ $ 25,738 ​ $ (115,647) Net current period change ​ 22,015 ​ (8,839) ​ — ​ 13,176 Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty ​ ​ 21,687 ​ ​ — ​ ​ — ​ ​ 21,687 Reclassification to interest expense from interest rate swaps ​ — ​ (7,138) ​ — ​ (7,138) Balance as of December 31, 2019 ​ $ (114,947) ​ $ 1,287 ​ $ 25,738 ​ $ (87,922) ​

Capital and Accumulated Other C

Capital and Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2019
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Capital and Accumulated Other Comprehensive Income (Loss)	14. Capital and Accumulated Other Comprehensive Income (Loss) (a) Allocations of Net Income and Net Losses to Partners Except for special allocations to holders of profits interest units described below in Note 15(a) under the heading “Incentive Plan-Long-Term Incentive Units,” the Operating Partnership’s net income will generally be allocated to Digital Realty Trust, Inc. (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) Forward Equity Sale On September 27, 2018, Digital Realty Trust, Inc. completed an underwritten public offering of 9,775,000 shares of its common stock (including 1,275,000 shares from the exercise in full of the underwriters’ option to purchase additional shares), 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 an aggregate of 9,775,000 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. The Company expects to receive net proceeds of approximately $1.1 billion (net of fees and estimated expenses) upon full physical settlement of the forward sale agreements. On September 17, 2019, Digital Realty Trust, Inc. amended the forward sale agreements to extend the maturity date of such forward sales agreements from September 27, 2019 to September 25, 2020. Upon physical settlement of the forward sale agreements, the Operating Partnership is expected to issue partnership units to Digital Realty Trust, Inc. in exchange for contribution of the net proceeds. (c) Redeemable Preferred Units ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liquidation Annual ​ Units Outstanding as ​ Balance (in thousands, net of ​ ​ Date(s) ​ Initial Date to Value (in Distribution ​ of December 31, ​ issuance costs) as of December 31, Preferred Units (1) Issued Redeem (2) thousands) (3) Rate (4) 2019 ​ 2018 2019 ​ 2018 6.625% Series C Cumulative Redeemable Perpetual Preferred Units ​ Sep 14, 2017 ​ May 15, 2021 ​ $ 201,250 ​ $ 1.65625 8,050,000 8,050,000 ​ $ 219,250 ​ $ 219,250 5.875% Series G Cumulative Redeemable Preferred Units ​ Apr 9, 2013 ​ Apr 9, 2018 ​ 250,000 ​ 1.46875 10,000,000 10,000,000 ​ 241,468 ​ 241,468 7.375% Series H Cumulative Redeemable Preferred Units ​ Mar 26, 2014 ​ Mar 26, 2019 ​ — ​ 1.84375 — 14,600,000 ​ — ​ 353,290 6.350% Series I Cumulative Redeemable Preferred Units ​ Aug 24, 2015 ​ Aug 24, 2020 ​ 250,000 ​ 1.58750 10,000,000 10,000,000 ​ 242,012 ​ 242,012 5.250% Series J Cumulative Redeemable Preferred Units ​ Aug 7, 2017 ​ Aug 7, 2022 ​ 200,000 ​ 1.31250 8,000,000 8,000,000 ​ 193,540 ​ 193,540 5.850% Series K Cumulative Redeemable Preferred Units ​ Mar 13, 2019 ​ Mar 13, 2024 ​ ​ 210,000 ​ ​ 1.46250 ​ 8,400,000 ​ — ​ ​ 203,264 ​ ​ — 5.200% Series L Cumulative Redeemable Preferred Units ​ Oct 10, 2019 ​ Oct 10, 2024 ​ ​ 345,000 ​ ​ 1.30000 ​ 13,800,000 ​ — ​ ​ 334,886 ​ ​ — ​ ​ ​ ​ ​ ​ $ 1,456,250 ​ ​ ​ 58,250,000 50,650,000 ​ $ 1,434,420 ​ $ 1,249,560 (1) All series of preferred units do not have a stated maturity date and are not subject to any sinking fund or mandatory redemption provisions. Upon liquidation, dissolution or winding up, each series of preferred units will rank senior to Digital Realty Trust, Inc. common units and on parity with the other series of preferred units. (2) Except in limited circumstances, reflects earliest date that Digital Realty Trust, Inc. may exercise its option to redeem the corresponding series of preferred stock, at a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but excluding the date of redemption. The Operating Partnership is required to redeem the corresponding series of preferred units in the event that the General Partner redeems a series of preferred stock. (3) Liquidation preference is $25.00 per unit. (4) Distributions on preferred units are cumulative and payable quarterly in arrears. (d) 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 units and incentive units of the Operating Partnership met the criteria to be classified within capital, except for certain common units issued to certain former DFT Operating Partnership unitholders in the DFT Merger which are subject to certain restrictions and are not presented as permanent capital in the consolidated balance sheet. The redemption value of the limited partners’ common units and the vested incentive units was approximately $997.6 million and $1,076.9 million based on the closing market price of Digital Realty Trust, Inc.’s common stock on December 31, 2019 and 2018, respectively. (e) Distributions All distributions on our units are at the discretion of Digital Realty Trust, Inc.’s Board of Directors. We have declared and paid the following distributions on our common and preferred units for the years ended December 31, 2019, 2018 and 2017 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Series C ​ Series F ​ Series G ​ Series H ​ Series I ​ Series J ​ Series K ​ Series L ​ ​ ​ ​ ​ ​ ​ ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Common ​ Date distribution declared Distribution payment date Units Units Units Units Units Units Units ​ Units ​ Units ​ Mar 1, 2017 ​ March 31, 2017 ​ $ — ​ $ 3,023 ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ — ​ $ — ​ $ — ​ $ 150,968 (1) May 8, 2017 ​ June 30, 2017 ​ — ​ — (2) 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ 153,176 (1) Aug 7, 2017 ​ September 29, 2017 ​ — ​ — ​ 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ 199,049 (1) Nov 2, 2017 ​ December 29, 2017 for Preferred Units; January 12, 2018 for Common Units ​ 3,963 (3) — ​ 3,672 ​ 6,730 ​ 3,969 ​ 4,200 (5) — ​ — ​ 199,061 (1) ​ ​ ​ ​ $ 3,963 ​ $ 3,023 ​ $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 4,200 ​ $ — ​ $ — ​ $ 702,254 ​ Mar 1, 2017 ​ March 30, 2018 ​ $ 3,333 ​ $ — ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ $ 216,953 (4) May 8, 2018 ​ June 29, 2018 ​ 3,333 ​ — ​ 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ 216,789 (4) Aug 14, 2018 ​ September 28, 2018 ​ 3,333 ​ — ​ 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ 216,825 (4) Nov 12, 2018 ​ December 31, 2018 for Preferred Units; January 15, 2019 for Common Units ​ 3,333 ​ — ​ 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ 216,838 (4) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 10,500 ​ $ — ​ $ — ​ $ 867,405 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ February 21, 2019 ​ March 29, 2019 ​ $ 3,333 ​ $ — ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ $ 235,256 (5) May 13, 2019 ​ June 28, 2019 ​ 3,333 ​ — ​ 3,672 ​ — (6) 3,969 ​ 2,625 ​ 3,686 (7) — ​ 235,142 (5) August 13, 2019 ​ September 30, 2019 ​ 3,333 ​ — ​ 3,672 ​ — ​ 3,969 ​ 2,625 ​ 3,071 ​ — ​ 235,164 (5) November 19, 2019 ​ December 31, 2019 for Preferred Units; January 15, 2020 for Common Units ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — ​ ​ 3,969 ​ ​ 2,625 ​ ​ 3,071 ​ ​ 4,036 (8) ​ 235,154 (5) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 6,730 ​ $ 15,876 ​ $ 10,500 ​ $ 9,828 ​ $ 4,036 ​ $ 940,716 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Annual rate of distribution per unit ​ ​ ​ $ 1.65625 ​ $ 1.65625 ​ $ 1.46875 ​ $ 1.84375 ​ $ 1.58750 ​ $ 1.31250 ​ $ 1.46250 ​ $ 1.30000 ​ ​ ​ ​ (1) $3.720 annual rate of distribution per unit. (2) Redeemed on April 5, 2017 for $25.01840 per unit, or a redemption price of $25.00 per unit, plus accrued and unpaid distributions up to but not including the redemption date of approximately $0.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $6.3 million were recorded as a reduction to net income available to common unitholders. (3) Represents a pro rata distribution from and including the original issue date to and including December 31, 2017. (4) $4.040 annual rate of distribution per unit. (5) $4.320 annual rate of distribution per unit. (6) Redeemed on April 1, 2019 for $25.00 per unit, or a redemption price of $25.00 per unit, plus accrued and unpaid distributions up to but not including the redemption date. In connection with the redemption, the previously incurred offering costs of approximately $11.8 million were recorded as a reduction to net income available to common unitholders. (7) Represents a pro rata distribution from and including the original issue date to and including June 30, 2019. (8) Represents a pro rata distribution from and including the original issue date to and including December 31, 2019. ​ (f) Accumulated Other Comprehensive Income (Loss) The accumulated balances for each item within other comprehensive income (loss) are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign currency ​ ​ ​ Foreign currency net ​ Accumulated other ​ ​ translation ​ Cash flow hedge ​ investment hedge ​ comprehensive ​ adjustments adjustments adjustments loss Balance as of December 31, 2017 ​ $ (151,795) ​ $ 12,758 ​ $ 26,152 ​ $ (112,885) Net current period change ​ (11,736) ​ 8,197 ​ — ​ (3,539) Reclassification to interest expense from interest rate swaps ​ — ​ (3,969) ​ — ​ (3,969) Balance as of December 31, 2018 ​ $ (163,531) ​ $ 16,986 ​ $ 26,152 ​ $ (120,393) Net current period change ​ 23,975 ​ (9,232) ​ — ​ 14,743 Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty ​ ​ 21,687 ​ ​ — ​ ​ — ​ ​ 21,687 Reclassification to interest expense from interest rate swaps ​ — ​ (7,446) ​ — ​ (7,446) Balance as of December 31, 2019 ​ $ (117,869) ​ $ 308 ​ $ 26,152 ​ $ (91,409) ​

Incentive Plan

Incentive Plan	12 Months Ended
	Dec. 31, 2019
Incentive Plan
Incentive Plan	15. Incentive Plan On April 28, 2014, our 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). The 2014 Incentive Award Plan became effective and replaced the Amended and Restated 2004 Incentive Award Plan, as amended, 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 As of December 31, 2019, approximately 6.6 million shares of common stock, including awards convertible into or exchangeable for shares of common stock, remained available for future issuance under the 2014 Incentive Award Plan. Each long-term incentive unit and each 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. Below is a summary of our compensation expense for the years ended December 31, 2019, 2018 and 2017 and our unearned compensation as of December 31, 2019 and December 31, 2018 (in millions): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Expected ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ period to ​ ​ Deferred Compensation Unearned Compensation recognize ​ ​ Expensed ​ Capitalized ​ As of ​ As of unearned ​ Year Ended December 31, ​ Year Ended December 31, ​ December 31, ​ December 31, compensation Type of incentive award 2019 2018 2017 2019 2018 2017 2019 2018 (in years) Long-term incentive units ​ $ 8.7 ​ $ 6.8 ​ $ 3.9 ​ $ 0.2 ​ $ 0.2 ​ $ 1.7 ​ $ 15.4 ​ $ 11.5 2.2 Market performance-based awards ​ 13.0 ​ 12.7 ​ 9.6 ​ 0.8 ​ 0.8 ​ 2.3 ​ 28.4 ​ 24.8 2.5 Restricted stock ​ 11.5 ​ 6.1 ​ 4.5 ​ 2.8 ​ 4.2 ​ 3.3 ​ 29.1 ​ 23.6 2.6 ​ The following table sets forth the weighted average fair value of for each type of incentive award at the date of grant for the years ended December 31, 2019, 2018 and 2017: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average Fair Value at Date of Grant Type of incentive award 2019 2018 2017 Long-term incentive units ​ $ 116.22 ​ $ 101.86 ​ $ 109.71 Market performance-based awards ​ $ 114.97 ​ $ 119.29 ​ $ 111.06 Restricted stock ​ $ 115.25 ​ $ 100.33 ​ $ 108.65 ​ (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 the 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 and privileges of common units of the Operating Partnership, including redemption rights. In order to achieve full parity with common units, long-term incentive units must be fully vested and the holder’s capital account balance in respect of such long-term incentive units must be equal to the capital account balance of a holder of an equivalent number of common units. The capital account balance attributable to each common unit is generally expected to be the same, in part because of the amount credited to a partner’s capital account upon the partner’s contribution of property to the Operating Partnership, and in part because the partnership agreement provides, in most cases, that allocations of income, gain, loss and deduction (which will adjust the partner’s capital accounts) are to be made to the common units on a proportionate basis. As a result, with respect to a number of long-term incentive units, it is possible to determine the capital account balance of an equivalent number of common units by multiplying the number of long-term incentive units by the capital account balance with respect to a common unit. A partner’s initial capital account balance is equal to the amount the partner paid (or contributed to the Operating Partnership) for the partner’s units and is subject to subsequent adjustments, including with respect to the partner’s share of income, gain or loss of the Operating Partnership. Because a holder of long-term incentive units generally will not pay for the long-term incentive units, the initial capital account balance attributable to such long-term incentive units will be zero. However, the Operating Partnership is required to allocate income, gain, loss and deduction to the partner’s capital accounts in accordance with the terms of the partnership agreement, subject to applicable Treasury Regulations. The partnership agreement provides that holders of long-term incentive units will receive special allocations of gain in the event of a sale or “hypothetical sale” of assets of the Operating Partnership prior to the allocation of gain to Digital Realty Trust, Inc. or other limited partners with respect to their common units. The amount of any such allocation will, to the extent of any such gain, be equal to the difference between the capital account balance of a holder of long-term incentive units attributable to such units and the capital account balance attributable to an equivalent number of common units. If and when such gain allocation is fully made, a holder of long-term incentive units will have achieved full parity with holders of common units. To the extent that, upon an actual sale or a “hypothetical sale” of the Operating Partnership’s assets as described above, there is not sufficient gain to allocate to a holder’s capital account with respect to long-term incentive units, or if such sale or “hypothetical sale” does not occur, such units will not achieve parity with common units. The term “hypothetical sale” refers to circumstances that are not actual sales of the Operating Partnership’s assets but that require certain adjustments to the value of the Operating Partnership’s assets and the partners’ capital account balances. Specifically, the partnership agreement provides that, from time to time, in accordance with applicable Treasury Regulations, the Operating Partnership will adjust the value of its assets to equal their respective fair market values, and adjust the partners’ capital accounts, in accordance with the terms of the partnership agreement, as if the Operating Partnership sold its assets for an amount equal to their value. Such adjustments will generally be made upon the liquidation of the Operating Partnership, the acquisition of an additional interest in the Operating Partnership by a new or existing partner in exchange for more than a de minimis capital contribution, the distribution by the Operating Partnership to a partner of more than a de minimis amount of partnership property as consideration for an interest in the Operating Partnership, the grant of an interest in the Operating Partnership (other than a de minimis interest) as consideration for the performance of services to or for the benefit of the Operating Partnership (including the grant of a long-term incentive unit), and at such other times as may be desirable or required to comply with the Treasury Regulations. Below is a summary of our long-term incentive unit activity for the year ended December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ Grant Date Fair Unvested Long-term Incentive Units ​ Units Value Unvested, beginning of period 162,186 ​ $ 100.59 Granted 120,368 ​ 116.22 Vested (55,039) ​ 100.33 Cancelled or expired (19,228) ​ 97.32 Unvested, end of period 208,287 ​ $ 110.00 ​ The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock on the applicable grant date(s), are being expensed on a straight-line basis for service awards between two (b) Market Performance-Based Awards During the years ended December 31, 2019, 2018 and 2017, the Compensation Committee of the Board of Directors of Digital Realty Trust, Inc. 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 Digital Realty Trust, Inc.’s common stock (collectively, the “awards”), under the 2014 Incentive Award Plan 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 2017, January 2018 or January 2019, 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 Digital Realty Trust, Inc.’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 applicable 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: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Market ​ ​ ​ Performance ​ ​ ​ RMS Relative Vesting ​ Level Market Performance Percentage ​ Below Threshold Level ≤ -300 basis points 0 % Threshold Level -300 basis points 25 % Target Level 100 basis points 50 % High Level ≥ 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. In January 2020, following the completion of the applicable Market Performance Period, the Compensation Committee determined that the RMS Relative Market Performance fell between the target and high level for the 2017 awards and, accordingly, 137,816 Class D units (including 10,971 distribution equivalent units that immediately vested on December 31, 2019) and 29,141 RSUs performance vested, subject to service-based vesting. On February 27, 2020, 50% of the 2017 awards vested and the remaining 50% will vest on February 27, 2021, subject to continued employment through each applicable vesting date. In January 2019, following the completion of the applicable Market Performance Period, the Compensation Committee determined that the high level had been achieved for the 2016 awards and, accordingly, 339,317 Class D units (including 31,009 distribution equivalent units that immediately vested on December 31, 2018, upon the high level being achieved) and 56,778 RSUs performance vested, subject to service-based vesting. On February 27, 2019, 50% of the 2016 awards vested and the remaining 50% vested on February 27, 2020. In January 2018, following the completion of the applicable Market Performance Period, the Compensation Committee determined that the high level had been achieved for the 2015 awards and, accordingly, 363,193 Class D units (including 36,246 distribution equivalent units that immediately vested on December 31, 2017, upon the high level being achieved) and 49,707 RSUs performance vested, subject to service-based vesting. On February 27, 2018, 50% of the 2015 awards vested and the remaining 50% vested on February 27, 2019. Following the completion of the applicable Market Performance Period, the 2018 awards that satisfy the market condition, if any, will vest 50% on February 27, 2021 and 50% on February 27, 2022, subject to continued employment through each applicable vesting date. Following the completion of the Market Performance Period, the 2019 awards that satisfy the market condition, if any, will vest 50% on February 27, 2022 and 50% on February 27, 2023, subject to continued employment through each applicable vesting date. Service-based vesting will be accelerated, in full or on a pro rata basis, as applicable, 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 applicable Market Performance Period. However, vesting with respect to the market condition will continue to be measured based on RMS Relative Market Performance during the applicable three-year Market Performance Period (or, in the case of a change in control, shortened Market Performance Period). The fair values of the 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 valuations are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ Expected Stock Price Risk-Free Interest ​ Award Date Volatility rate ​ January 1, 2017 25 % 1.49 % February 28, 2017 23 % 1.43 % January 1, 2018 22 % 1.98 % March 1, 2018 22 % 2.34 % March 9, 2018 22 % 2.42 % January 1, 2019 ​ 23 % 2.44 % February 21, 2019 ​ 23 % 2.48 % ​ These valuations were performed in a risk-neutral framework, and no assumption was made with respect to an equity risk premium. As of December 31, 2019, 2,509,963 Class D units and 696,379 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 distribution equivalent units. The grant date fair value of these awards was approximately $22.3 million, $21.8 million and $19.5 million for the years ended December 31, 2019, 2018 and 2017, respectively. We will recognize compensation expense on a straight-line basis over the expected service period of approximately four years. (c) Restricted Stock Below is a summary of our restricted stock activity for the year ended December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ Grant Date Fair Unvested Restricted Stock Shares Value Unvested, beginning of period 299,215 ​ $ 97.55 Granted (1) 226,902 ​ 115.25 Vested (111,950) ​ 93.38 Cancelled or expired (41,375) ​ 107.52 Unvested, end of period 372,792 ​ $ 108.47 (1) All restricted stock awards granted in 2019 are subject only to service conditions. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock on the grant date, are expensed on a straight-line basis for service awards over the vesting period of the restricted stock, which is generally four years. (d) 401(k) Plan We have a 401(k) plan whereby our employees may contribute a portion of their compensation to their respective retirement accounts, in an amount not to exceed the maximum allowed under the Code. The 401(k) plan complies with Internal Revenue Service requirements as a 401(k) safe harbor plan whereby matching contributions made by us are 100% vested. The aggregate cost of our contributions to the 401(k) plan was approximately $5.2 million, $4.8 million, and $4.6 million for the years ended December 31, 2019, 2018 and 2017, respectively.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2019
Derivative Instruments
Derivative Instruments	16. 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 December 31, 2019, 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 The Company presents its interest rate derivatives in its consolidated balance sheets on a gross basis as interest rate swap assets (recorded in other assets) and interest rate swap liabilities (recorded in accounts payable and other accrued liabilities). As of December 31, 2019, there was no impact from netting arrangements as the Company did not have any Cash Flow Hedges of Interest Rate Risk Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements related to certain floating rate debt obligations. To accomplish this objective, we primarily use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. We record all our interest rate swaps on the consolidated balance sheets at fair value. In determining the fair value of our interest rate swaps, we consider the credit risk of our counterparties. These counterparties are generally larger financial institutions engaged in providing a variety of financial services. These institutions generally face similar risks regarding adverse changes in market and economic conditions, including, but not limited to, fluctuations in interest rates, exchange rates, equity and commodity prices and credit spreads. The recent and pervasive disruptions in the financial markets have heightened the risks to these institutions. As of December 31, 2019 and December 31, 2018, we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value at Significant Other Notional Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ Observable Inputs (Level 2) As of ​ As of ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of December 31, ​ December 31, ​ Type of ​ Strike ​ Effective ​ Expiration ​ December 31, ​ December 31, 2019 2018 Derivative Rate Date Date 2019 (3) 2018 (3) Currently-paying contracts ​ ​ ​ $ — ​ $ 206,000 (1) Swap 1.611 ​ Jun 15, 2017 ​ Jan 15, 2020 ​ $ — ​ $ 1,976 ​ — ​ 54,905 (1) Swap 1.605 ​ Jun 6, 2017 ​ Jan 6, 2020 ​ — ​ 517 ​ 29,000 (1) 75,000 (1) Swap 1.016 ​ Apr 6, 2016 ​ Jan 6, 2021 ​ 175 ​ 2,169 ​ 75,000 (1) 75,000 (1) Swap 1.164 ​ Jan 15, 2016 ​ Jan 15, 2021 ​ 345 ​ 1,970 ​ 300,000 (1) 300,000 (1) Swap 1.435 ​ Jan 15, 2016 ​ Jan 15, 2023 ​ 945 ​ 11,463 ​ 75,825 (2) 72,220 (2) Swap 0.779 ​ Jan 15, 2016 ​ Jan 15, 2021 ​ 931 ​ 2,024 $ 479,825 ​ $ 783,125 ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 2,396 ​ $ 20,119 (1) Represents debt which bears interest based on one-month U.S. LIBOR. (2) Represents debt which bears interest based on one-month CDOR. Translation to U.S. dollars is based on exchange rates of $0.77 to 1.00 CAD as of December 31, 2019 and $0.73 to 1.00 CAD as of December 31, 2018. (3) Balance recorded in other assets in the consolidated balance sheets if positive and recorded in accounts payable and other accrued liabilities in the consolidated balance sheets if negative. Amounts reported in accumulated other comprehensive loss related to interest rate swaps will be reclassified to interest expense as interest payments are made on our debt. As of December 31, 2019, we estimate that an additional $1.6 million will be reclassified as a decrease to interest expense during the year ending December 31, 2020, when the hedged forecasted transactions impact earnings. Foreign Currency Net Investment Hedges During the three months ended June 30, 2016, we entered into a series of forward contracts pursuant to which we agreed to sell an amount of foreign currency for an agreed upon amount of U.S. dollars. These forward contracts were executed to manage foreign currency exposures associated with certain transactions. As of June 30, 2016, the forward contracts did not meet the criteria for hedge accounting under GAAP and had a fair value of approximately $37.8 million. On July 1, 2016, the four forward contracts still in place met the criteria for net investment hedge accounting. During the year ended December 31, 2017, we terminated the four forward contracts with a notional amount of GBP 357.3 million. In connection with the settlement, we received approximately $64.0 million in proceeds and the related amount of approximately $26.2 million of accumulated other comprehensive income (AOCI) will remain in AOCI until the Company sells or liquidates its GBP-denominated investments, which has not occurred as of December 31, 2019.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2019
Fair Value of Financial Instruments
Fair Value of Financial Instruments	17. Fair Value of Instruments We disclose fair value information about all financial instruments, whether or not recognized in the 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 December 31, 2019 and December 31, 2018 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 16. "Derivative Instruments", the interest rate swaps and foreign currency forward contracts are recorded at fair value. We calculate the fair value of our mortgage loans, unsecured term loans and unsecured senior notes 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 facilities approximates fair value, due to the variability of interest rates. As of December 31, 2019 and December 31, 2018, the aggregate estimated fair value and carrying value of our global revolving credit facilities, unsecured term loans, unsecured senior notes and mortgage loans were as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Categorization ​ As of December 31, 2019 ​ As of December 31, 2018 ​ ​ under the fair value ​ Estimated Fair ​ ​ ​ ​ Estimated Fair ​ ​ ​ ​ hierarchy Value Carrying Value Value Carrying Value Global revolving credit facilities (1)(4) Level 2 ​ $ 245,766 ​ $ 245,766 ​ $ 1,663,156 ​ $ 1,663,156 Unsecured term loans (2)(4) Level 2 ​ 813,205 ​ 813,205 ​ 1,183,121 ​ 1,183,121 Unsecured senior notes (3)(4) Level 2 ​ 9,697,166 ​ 9,025,229 ​ 7,684,368 ​ 7,629,679 Secured debt (3)(4) Level 2 ​ 105,245 ​ 105,143 ​ 706,086 ​ 705,924 ​ ​ ​ ​ $ 10,861,382 ​ $ 10,189,343 ​ $ 11,236,731 ​ $ 11,181,880 (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 loans 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 secured debt are determined based on the expected future payments discounted at risk-adjusted rates and quoted market prices. (4) The carrying value excludes unamortized premiums (discounts) and deferred financing costs (see note 9). ​

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies.
Commitments and Contingencies	18. Commitments and Contingencies (a) Contingent Liabilities On October 29, 2019, Digital Realty Trust, Inc., Digital Intrepid Holding B.V., an indirect subsidiary of Digital Realty Trust, Inc. (the “Buyer”), and InterXion Holding N.V. (“InterXion”) entered into a purchase agreement, pursuant to which, subject to the terms and conditions of the purchase agreement, the Buyer commenced an exchange offer to purchase all of the outstanding ordinary shares of InterXion in exchange for shares of common stock of Digital Realty Trust, Inc. The transaction is expected to close in 2020 and is subject to customary closing conditions. Generally, all fees and expenses incurred in connection with the transaction will be paid by the party incurring those fees and expenses. Additionally, upon termination of the purchase agreement in certain circumstances, the purchase agreement provides for the payment of a termination fee to the Company by InterXion of $72.6 million. The purchase agreement also provides for the payment of a termination fee to InterXion by the Company of $254.3 million upon termination of the purchase agreement in certain circumstances. (b) Construction Commitments Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements and 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 December 31, 2019, we had open commitments, including amounts reimbursable of approximately $25.4 million, related to construction contracts of approximately $472.7 million. (c) Legal Proceedings Although the Company is involved in legal proceedings arising in the ordinary course of business, as of December 31, 2019, 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.

Quarterly Financial Information

Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information (unaudited)
Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited)	19. Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited) The tables below reflect selected quarterly information for the years ended December 31, 2019 and 2018. Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per share amounts). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2019 ​ 2019 ​ June 30, 2019 ​ March 31, 2019 Total operating revenues ​ $ 787,463 ​ $ 806,466 ​ $ 800,797 ​ $ 814,515 Net income ​ 349,326 ​ 67,574 ​ 61,324 ​ 120,997 Net income attributable to Digital Realty Trust, Inc. ​ 336,284 ​ 66,497 ​ 60,168 ​ 116,812 Preferred stock dividends and issuance costs associated with redeemed preferred stock ​ (20,707) ​ (16,670) ​ (28,430) ​ (20,943) Net income available to common stockholders ​ 315,577 ​ 49,827 ​ 31,738 ​ 95,869 Basic net income per share available to common stockholders ​ $ 1.51 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 Diluted net income per share available to common stockholders ​ $ 1.50 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2018 ​ 2018 ​ June 30, 2018 ​ March 31, 2018 Total operating revenues ​ $ 778,267 ​ $ 768,924 ​ $ 754,919 ​ $ 744,368 Net income ​ 52,597 ​ 90,264 ​ 88,159 ​ 110,095 Net income attributable to Digital Realty Trust, Inc. ​ 51,559 ​ 87,597 ​ 85,463 ​ 106,627 Preferred stock dividends and issuance costs associated with redeemed preferred stock ​ (20,329) ​ (20,329) ​ (20,329) ​ (20,329) Net income available to common stockholders ​ 31,230 ​ 67,268 ​ 65,134 ​ 86,298 Basic net income per share available to common stockholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 Diluted net income per share available to common stockholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 ​

Quarterly Financial Informati_2

Quarterly Financial Information (Digital Realty Trust, L.P.)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information [Line Items]
Quarterly Financial Information (Digital Realty Trust, L.P.) (unaudited)	19. Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited) The tables below reflect selected quarterly information for the years ended December 31, 2019 and 2018. Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per share amounts). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2019 ​ 2019 ​ June 30, 2019 ​ March 31, 2019 Total operating revenues ​ $ 787,463 ​ $ 806,466 ​ $ 800,797 ​ $ 814,515 Net income ​ 349,326 ​ 67,574 ​ 61,324 ​ 120,997 Net income attributable to Digital Realty Trust, Inc. ​ 336,284 ​ 66,497 ​ 60,168 ​ 116,812 Preferred stock dividends and issuance costs associated with redeemed preferred stock ​ (20,707) ​ (16,670) ​ (28,430) ​ (20,943) Net income available to common stockholders ​ 315,577 ​ 49,827 ​ 31,738 ​ 95,869 Basic net income per share available to common stockholders ​ $ 1.51 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 Diluted net income per share available to common stockholders ​ $ 1.50 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2018 ​ 2018 ​ June 30, 2018 ​ March 31, 2018 Total operating revenues ​ $ 778,267 ​ $ 768,924 ​ $ 754,919 ​ $ 744,368 Net income ​ 52,597 ​ 90,264 ​ 88,159 ​ 110,095 Net income attributable to Digital Realty Trust, Inc. ​ 51,559 ​ 87,597 ​ 85,463 ​ 106,627 Preferred stock dividends and issuance costs associated with redeemed preferred stock ​ (20,329) ​ (20,329) ​ (20,329) ​ (20,329) Net income available to common stockholders ​ 31,230 ​ 67,268 ​ 65,134 ​ 86,298 Basic net income per share available to common stockholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 Diluted net income per share available to common stockholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 ​
Digital Realty Trust, L.P.
Quarterly Financial Information [Line Items]
Quarterly Financial Information (Digital Realty Trust, L.P.) (unaudited)	20. Quarterly Financial Information (Digital Realty Trust, L.P.) (unaudited) The tables below reflect selected quarterly information for the years ended December 31, 2019 and 2018. Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per unit amounts). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2019 ​ 2019 ​ June 30, 2019 ​ March 31, 2019 Total operating revenues ​ $ 787,463 ​ $ 806,466 ​ $ 800,797 ​ $ 814,515 Net income ​ 349,326 ​ 67,574 ​ 61,324 ​ 120,997 Net income attributable to Digital Realty Trust, L.P. ​ 349,384 ​ 68,797 ​ 61,568 ​ 121,112 Preferred unit distributions and issuance costs associated with redeemed preferred units ​ (20,707) ​ (16,670) ​ (28,430) ​ (20,943) Net income available to common unitholders ​ 328,677 ​ 52,127 ​ 33,138 ​ 100,169 Basic net income per unit available to common unitholders ​ $ 1.51 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 Diluted net income per unit available to common unitholders ​ $ 1.50 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2018 ​ 2018 ​ June 30, 2018 ​ March 31, 2018 Total operating revenues ​ $ 778,267 ​ $ 768,924 ​ $ 754,919 ​ $ 744,368 Net income ​ 52,597 ​ 90,264 ​ 88,159 ​ 110,095 Net income attributable to Digital Realty Trust, L.P. ​ 52,859 ​ 90,297 ​ 88,163 ​ 110,107 Preferred unit distributions and issuance costs associated with redeemed preferred units ​ (20,329) ​ (20,329) ​ (20,329) ​ (20,329) Net income available to common unitholders ​ 32,530 ​ 69,968 ​ 67,834 ​ 89,778 Basic net income per unit available to common unitholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 Diluted net income per unit available to common unitholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 ​

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Events
Subsequent Events	21. Subsequent Events On January 17, 2020, Digital Dutch Finco B.V., a wholly owned indirect finance subsidiary of the Operating Partnership, issued and sold €300.0 million aggregate principal amount of 0.125% Guaranteed Notes due 2022 (the “2022 Notes”), €650.0 million aggregate principal amount of 0.625% Guaranteed Notes due 2025 (the “2025 Notes”) and €750.0 million aggregate principal amount of 1.500% Guaranteed Notes due 2030 (the “2030 Notes” and, together with the 2022 Notes and 2025 Notes, the “Euro Notes”). The Euro Notes are senior unsecured obligations of Digital Dutch Finco B.V. and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. and the Operating Partnership. Net proceeds from the offering were approximately €1,678.6 million (approximately $1,861.9 million based on the exchange rate on January 17, 2020) after deducting managers’ discounts and estimated offering expenses. ​ On February 25, 2020, we closed on the acquisition of a 49% ownership interest in the Westin Building Exchange in Seattle for a purchase price of approximately $305 million plus closing costs. The acquisition of the interest held by seller increases our ownership interest to 99% of the property. ​

Schedule III Properties And Acc

Schedule III Properties And Accumulated Depreciation	12 Months Ended
	Dec. 31, 2019
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Schedule III Properties And Accumulated Depreciation	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Costs capitalized ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ subsequent to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Initial costs ​ acquisition ​ Total costs ​ Accumulated ​ Date of ​ Acquisition ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ depreciation ​ acquisition ​ (A) or ​ ​ Metropolitan ​ ​ ​ ​ ​ ground ​ Buildings and ​ ​ ​ Carrying ​ ​ ​ ground ​ Buildings and ​ ​ ​ and ​ or ​ construction ​ Area Encumbrances Land lease improvements Improvements costs Land lease improvements Total amortization construction (C) PROPERTIES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 36 NE 2nd Street ​ Miami ​ — ​ 1,942 ​ — ​ 24,184 ​ 28,557 ​ — ​ 1,943 ​ — ​ 52,740 ​ 54,683 ​ (20,112) ​ 2002 ​ (A) 2323 Bryan Street Dallas — 1,838 — 77,604 51,961 — 1,672 — 129,731 131,403 (77,314) 2002 (A) 300 Boulevard East New York — 5,140 — 48,526 56,701 — 5,140 — 105,227 110,367 (70,773) 2002 (A) 2334 Lundy Place Silicon Valley — 3,607 — 23,008 63 — 3,607 — 23,071 26,678 (11,349) 2002 (A) 2440 Marsh Lane Dallas — 1,477 — 10,330 74,858 — 1,486 — 85,179 86,665 (70,641) 2003 (A) 4849 Alpha Road Dallas — 2,983 — 10,650 44,117 — 2,983 — 54,767 57,750 (37,360) 2004 (A) 600 West Seventh Street Los Angeles — 18,478 — 50,824 78,054 — 18,537 — 128,819 147,356 (73,549) 2004 (A) 2045 & 2055 LaFayette Street Silicon Valley — 6,065 — 43,817 45 — 6,065 — 43,862 49,927 (20,264) 2004 (A) 11830 Webb Chapel Road Dallas — 5,881 — 34,473 2,534 — 5,881 — 37,007 42,888 (18,292) 2004 (A) 150 South First Street Silicon Valley — 2,068 — 29,214 1,499 — 2,068 — 30,713 32,781 (14,486) 2004 (A) 200 Paul Avenue San Francisco — 14,427 — 75,777 122,607 — 13,162 — 199,649 212,811 (95,975) 2004 (A) 1100 Space Park Drive Silicon Valley — 5,130 — 18,206 43,521 — 5,130 — 61,727 66,857 (36,889) 2004 (A) 3015 Winona Avenue Los Angeles — 6,534 — 8,356 6 — 6,534 — 8,362 14,896 (4,007) 2004 (A) 350 East Cermak Road Chicago — 8,466 — 103,232 248,477 — 8,620 — 351,555 360,175 (238,555) 2005 (A) 2401 Walsh Street Silicon Valley — 5,775 — 19,267 115 — 5,775 — 19,382 25,157 (9,323) 2005 (A) 2403 Walsh Street Silicon Valley — 5,514 — 11,695 124 — 5,514 — 11,819 17,333 (5,944) 2005 (A) 200 North Nash Street Los Angeles — 4,562 — 12,503 344 — 4,562 — 12,847 17,409 (7,010) 2005 (A) 731 East Trade Street Charlotte 1,089 (1) 1,748 — 5,727 267 — 1,748 — 5,994 7,742 (2,782) 2005 (A) 113 North Myers Charlotte — 1,098 — 3,127 5,007 — 1,098 — 8,134 9,232 (2,942) 2005 (A) 125 North Myers Charlotte — 1,271 — 3,738 6,378 — 1,271 — 10,116 11,387 (7,820) 2005 (A) Paul van Vlissingenstraat 16 Amsterdam — — — 15,255 26,000 — — — 41,255 41,255 (22,108) 2005 (A) 600-780 S. Federal Chicago — 7,849 — 27,881 44,112 — 7,304 — 72,538 79,842 (20,834) 2005 (A) Chemin de l’Epinglier 2 Geneva — — — 20,071 (990) — — — 19,081 19,081 (8,548) 2005 (A) 7500 Metro Center Drive Austin — 1,177 — 4,877 71,399 — 1,177 — 76,276 77,453 (16,572) 2005 (A) 3 Corporate Place New York — 1,543 — 12,678 92,737 — 1,543 — 105,415 106,958 (87,175) 2005 (A) 1115 Centennial Avenue New York — 581 — — 58,202 — 581 — 58,202 58,783 (2,518) 2005 (C) 4025 Midway Road Dallas — 2,196 — 14,037 30,398 — 2,017 — 44,614 46,631 (32,501) 2006 (A) Clonshaugh Industrial Estate Dublin — — 1,444 5,569 1,493 — — 93 8,413 8,506 (5,526) 2006 (A) Digital Houston Houston — 6,965 — 23,492 148,349 — 6,594 — 172,212 178,806 (80,689) 2006 (A) 120 E Van Buren Phoenix — 4,524 — 157,822 121,422 — 4,524 — 279,244 283,768 (148,484) 2006 (A) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Costs capitalized ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ subsequent to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Initial costs ​ acquisition ​ Total costs ​ Accumulated ​ Date of ​ Acquisition ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ depreciation ​ acquisition ​ (A) or ​ ​ Metropolitan ​ ​ ​ ​ ​ ground ​ Buildings and ​ ​ ​ Carrying ​ ​ ​ ground ​ Buildings and ​ ​ ​ and ​ or ​ construction ​ Area Encumbrances Land lease improvements Improvements costs Land lease improvements Total amortization construction (C) PROPERTIES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gyroscoopweg 2E-2F Amsterdam — — — 13,450 (1,643) ​ — ​ — ​ — ​ 11,807 ​ 11,807 ​ (5,260) 2006 (A) Clonshaugh Industrial Estate II Dublin — — — — 77,840 ​ — ​ — ​ — ​ 77,840 ​ 77,840 ​ (50,061) 2006 (C) 600 Winter Street Boston — 1,429 — 6,228 456 ​ — ​ 1,429 ​ — ​ 6,684 ​ 8,113 ​ (2,757) 2006 (A) 2300 NW 89th Place Miami — 1,022 — 3,767 19 ​ — ​ 1,022 ​ — ​ 3,786 ​ 4,808 ​ (1,800) 2006 (A) Unit 9, Blanchardstown Corporate Park Dublin — 1,927 — 40,024 23,867 ​ — ​ 1,623 ​ — ​ 64,195 ​ 65,818 ​ (28,897) 2006 (A) 111 8th Avenue New York — — — 17,688 29,149 ​ — ​ — ​ — ​ 46,837 ​ 46,837 ​ (33,612) 2006 (A) 8100 Boone Boulevard N. Virginia — — — 158 2,034 ​ — ​ — ​ — ​ 2,192 ​ 2,192 ​ (2,192) 2006 (A) 3011 Lafayette Street Silicon Valley — 3,354 — 10,305 53,352 ​ — ​ 3,354 ​ — ​ 63,657 ​ 67,011 ​ (52,456) 2007 (A) 44470 Chilum Place N. Virginia — 3,531 — 37,360 1 ​ — ​ 3,531 ​ — ​ 37,361 ​ 40,892 ​ (13,154) 2007 (A) 43881 Devin Shafron Drive N. Virginia — 4,653 — 23,631 97,322 ​ — ​ 4,653 ​ — ​ 120,953 ​ 125,606 ​ (98,771) 2007 (A) 43831 Devin Shafron Drive N. Virginia — 3,027 — 16,247 1,441 ​ — ​ 3,027 ​ — ​ 17,688 ​ 20,715 ​ (7,156) 2007 (A) 43791 Devin Shafron Drive N. Virginia — 3,490 — 17,444 78,515 ​ — ​ 3,490 ​ — ​ 95,959 ​ 99,449 ​ (66,593) 2007 (A) Mundells Roundabout London — 31,354 — — 44,158 ​ — ​ 21,131 ​ — ​ 54,381 ​ 75,512 ​ (15,485) 2007 (C) 1500 Space Park Drive Silicon Valley — 6,732 — 6,325 46,593 ​ — ​ 4,106 ​ — ​ 55,544 ​ 59,650 ​ (53,696) 2007 (A) Cressex 1 London — 3,629 — 9,036 21,335 ​ — ​ 2,548 ​ — ​ 31,452 ​ 34,000 ​ (22,054) 2007 (A) Naritaweg 52 Amsterdam — — 1,192 23,441 (5,561) ​ — ​ — ​ 917 ​ 18,155 ​ 19,072 ​ (6,396) 2007 (A) 1 St. Anne’s Boulevard London — 1,490 — 1,045 (736) ​ — ​ 1,014 ​ — ​ 785 ​ 1,799 ​ (238) 2007 (A) 2 St. Anne’s Boulevard London — 922 — 695 34,379 ​ — ​ 676 ​ — ​ 35,320 ​ 35,996 ​ (7,647) 2007 (A) 3 St. Anne’s Boulevard London — 22,079 — 16,351 81,570 ​ — ​ 14,901 ​ — ​ 105,099 ​ 120,000 ​ (70,353) 2007 (A) 365 South Randolphville Road New York — 3,019 — 17,404 296,533 ​ — ​ 2,853 ​ — ​ 314,103 ​ 316,956 ​ (155,008) 2008 (A) 701 & 717 Leonard Street Dallas — 2,165 — 9,934 969 ​ — ​ 2,165 ​ — ​ 10,903 ​ 13,068 ​ (3,608) 2008 (A) Manchester Technopark Manchester — — — 23,918 (7,539) ​ — ​ — ​ — ​ 16,379 ​ 16,379 ​ (5,427) 2008 (A) 1201 Comstock Street Silicon Valley — 2,093 — 1,606 27,687 ​ — ​ 3,398 ​ — ​ 27,988 ​ 31,386 ​ (20,843) 2008 (A) 1550 Space Park Drive Silicon Valley — — — — — ​ — ​ — ​ — ​ — ​ — ​ — 2008 (A) 1525 Comstock Street Silicon Valley — 2,293 — 16,216 32,286 ​ — ​ 2,061 ​ — ​ 48,734 ​ 50,795 ​ (36,862) 2008 (C) 43830 Devin Shafron Drive N. Virginia — 5,509 — — 74,322 ​ — ​ 4,928 ​ — ​ 74,903 ​ 79,831 ​ (50,129) 2009 (C) 1232 Alma Road Dallas — 2,267 — 3,740 66,014 ​ — ​ 2,266 ​ — ​ 69,755 ​ 72,021 ​ (49,754) 2009 (A) 900 Quality Way Dallas — 1,446 — 1,659 69,987 ​ — ​ 1,437 ​ — ​ 71,655 ​ 73,092 ​ (25,389) 2009 (A) 1210 Integrity Drive Dallas — 2,041 — 3,389 187,448 ​ — ​ 3,204 ​ — ​ 189,674 ​ 192,878 ​ (13,445) 2009 (A) 907 Security Row Dallas — 333 — 344 97,851 ​ — ​ 2,112 ​ — ​ 96,416 ​ 98,528 ​ (12,469) 2009 (A) 908 Quality Way Dallas — 6,730 — 4,493 13,954 ​ — ​ 2,067 ​ — ​ 23,110 ​ 25,177 ​ (18,696) 2009 (A) 904 Quality Way Dallas — 760 — 744 6,812 ​ — ​ 1,151 ​ — ​ 7,165 ​ 8,316 ​ (1,382) 2009 (A) 1215 Integrity Drive Dallas — — — — 69,926 ​ — ​ 995 ​ — ​ 68,931 ​ 69,926 ​ (23,033) 2009 (C) 1350 Duane & 3080 Raymond Silicon Valley — 7,081 — 69,817 354 ​ — ​ 7,081 ​ — ​ 70,171 ​ 77,252 ​ (18,445) 2009 (A) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Costs capitalized ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ subsequent to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Initial costs ​ acquisition ​ Total costs ​ Accumulated ​ Date of ​ Acquisition ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ depreciation ​ acquisition ​ (A) or ​ ​ Metropolitan ​ ​ ​ ​ ​ ground ​ Buildings and ​ ​ ​ Carrying ​ ​ ​ ground ​ Buildings and ​ ​ ​ and ​ or ​ construction ​ Area Encumbrances Land lease improvements Improvements costs Land lease improvements Total amortization construction (C) PROPERTIES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 60 & 80 Merritt New York — 3,418 — 71,477 94,485 ​ — ​ 3,148 ​ — ​ 166,232 ​ 169,380 ​ (49,071) 2010 (A) 55 Middlesex Boston — 9,975 — 68,363 14,499 ​ — ​ 9,975 ​ — ​ 82,862 ​ 92,837 ​ (29,930) 2010 (A) 128 First Avenue Boston — 5,465 — 185,348 39,134 ​ — ​ 5,465 ​ — ​ 224,482 ​ 229,947 ​ (80,988) 2010 (A) Cateringweg 5 Amsterdam — — 3,518 3,517 37,814 ​ — ​ — ​ 3,223 ​ 41,626 ​ 44,849 ​ (9,429) 2010 (A) 1725 Comstock Street Silicon Valley — 3,274 — 6,567 39,308 ​ — ​ 3,274 ​ — ​ 45,875 ​ 49,149 ​ (29,302) 2010 (A) 3105 Alfred Street Silicon Valley — 6,533 — 3,725 123,691 ​ — ​ 6,533 ​ — ​ 127,416 ​ 133,949 ​ (38,853) 2010 (A) 365 Main Street San Francisco — 22,854 — 158,709 35,001 ​ — ​ 22,854 ​ — ​ 193,710 ​ 216,564 ​ (60,449) 2010 (A) 720 2nd Street San Francisco — 3,884 — 116,861 13,601 ​ — ​ 3,884 ​ — ​ 130,462 ​ 134,346 ​ (36,724) 2010 (A) 2260 East El Segundo Los Angeles — 11,053 — 51,397 17,433 ​ — ​ 11,053 ​ — ​ 68,830 ​ 79,883 ​ (23,640) 2010 (A) 2121 South Price Road Phoenix — 7,335 — 238,452 215,183 ​ — ​ 4,835 ​ — ​ 456,135 ​ 460,970 ​ (147,927) 2010 (A) 4030 Lafayette N. Virginia — 2,492 — 16,912 12,780 ​ — ​ 2,492 ​ — ​ 29,692 ​ 32,184 ​ (9,100) 2010 (A) 4040 Lafayette N. Virginia — 1,246 — 4,267 24,887 ​ — ​ 1,246 ​ — ​ 29,154 ​ 30,400 ​ (5,804) 2010 (A) 4050 Lafayette N. Virginia — 1,246 — 4,371 36,244 ​ — ​ 1,246 ​ — ​ 40,615 ​ 41,861 ​ (26,913) 2010 (A) 2805 Lafayette Street Silicon Valley — 8,976 — 18,155 131,011 ​ — ​ 8,294 ​ — ​ 149,848 ​ 158,142 ​ (38,954) 2010 (A) 29A International Business Park Singapore — — — 137,545 223,342 ​ — ​ — ​ — ​ 360,887 ​ 360,887 ​ (152,206) 2010 (A) 43940 Digital Loudoun Plaza N. Virginia — 6,229 — — 285,614 ​ — ​ 7,524 ​ — ​ 284,319 ​ 291,843 ​ (90,924) 2011 (C) 44060 Digital Loudoun Plaza N. Virginia — 3,700 — — 187,004 ​ — ​ 3,441 ​ — ​ 187,263 ​ 190,704 ​ (31,598) 2011 (C) 44100 Digital Loudoun Plaza N. Virginia — 3,700 — — 141,840 ​ — ​ 3,493 ​ — ​ 142,047 ​ 145,540 ​ (17,596) 2011 (C) 43780 Digital Loudoun Plaza N. Virginia — 3,671 — — 123,368 ​ — ​ 4,186 ​ — ​ 122,853 ​ 127,039 ​ (12,532) 2011 (C) 1-11 Templar Road Sydney — 6,937 — — 62,836 ​ — ​ 4,349 ​ — ​ 65,424 ​ 69,773 ​ (19,316) 2011 (C) 13-23 Templar Road Sydney ​ — 4,236 — — 52,379 ​ — ​ 2,501 ​ — ​ 54,114 ​ 56,615 ​ (1,034) 2011 (C) Fountain Court London — 7,544 — 12,506 100,446 ​ — ​ 6,569 ​ — ​ 113,927 ​ 120,496 ​ (30,892) 2011 (A) 72 Radnor Drive Melbourne — 2,568 — — 66,029 ​ — ​ 1,737 ​ — ​ 66,860 ​ 68,597 ​ (12,370) 2011 (C) 98 Radnor Drive Melbourne — 1,899 — — 36,140 ​ — ​ 1,339 ​ — ​ 36,700 ​ 38,039 ​ (17,738) 2011 (C) 105 Cabot Street Boston — 2,386 — — 35,876 ​ — ​ 1,161 ​ — ​ 37,101 ​ 38,262 ​ (11,061) 2011 (C) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Costs capitalized ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ subsequent to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Initial costs ​ acquisition ​ Total costs ​ Accumulated ​ Date of ​ Acquisition ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ depreciation ​ acquisition ​ (A) or ​ ​ Metropolitan ​ ​ ​ ​ ​ ground ​ Buildings and ​ ​ ​ Carrying ​ ​ ​ ground ​ Buildings and ​ ​ ​ and ​ or ​ construction ​ Area Encumbrances Land lease improvements Improvements costs Land lease improvements Total amortization construction (C) PROPERTIES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3825 NW Aloclek Place Portland ​ — 1,689 — — 58,230 ​ — ​ 1,689 ​ — ​ 58,230 ​ 59,919 ​ (24,836) 2011 (C) Profile Park Dublin ​ — 6,288 — — 56,087 ​ — ​ 2,050 ​ — ​ 60,325 ​ 62,375 ​ (6,256) 2011 (C) 760 Doug Davis Drive Atlanta ​ — 4,837 — 53,551 3,373 ​ — ​ 4,837 ​ — ​ 56,924 ​ 61,761 ​ (15,131) 2011 (A) 2501 S. State Hwy 121 Dallas ​ — 23,137 — 93,943 11,954 ​ — ​ 16,242 ​ — ​ 112,792 ​ 129,034 ​ (35,468) 2012 (A) 9333 Grand Avenue Chicago ​ — 5,686 — 14,515 75,076 ​ — ​ 1,205 ​ — ​ 94,072 ​ 95,277 ​ (40,321) 2012 (A) 9355 Grand Avenue Chicago ​ — — — — ​ 228,171 ​ — ​ 2,518 ​ — ​ 225,653 ​ 228,171 ​ (30,014) 2012 (A) 9377 Grand Avenue Chicago ​ — — — — ​ 133,910 ​ — ​ 2,799 ​ — ​ 131,111 ​ 133,910 ​ (6,039) 2012 (A) 850 E Collins Dallas ​ — 1,614 — — 86,565 ​ — ​ 1,614 ​ — ​ 86,565 ​ 88,179 ​ (23,682) 2012 (C) 950 E Collins Dallas ​ — 1,546 — — 75,695 ​ — ​ 1,546 ​ — ​ 75,695 ​ 77,241 ​ (15,163) 2012 (C) 400 S. Akard Dallas ​ — 10,075 — 62,730 2,943 ​ — ​ 10,075 ​ — ​ 65,673 ​ 75,748 ​ (13,571) 2012 (A) 410 Commerce Boulevard New York ​ — — — — 30,260 ​ — ​ — ​ — ​ 30,260 ​ 30,260 ​ (15,310) 2012 (C) Croydon London ​ — 1,683 — 104,728 47,591 ​ — ​ 2,367 ​ — ​ 151,635 ​ 154,002 ​ (31,430) 2012 (A) Watford London ​ — — 7,355 219,273 5,018 ​ — ​ — ​ 6,492 ​ 225,154 ​ 231,646 ​ (48,278) 2012 (A) Unit 21 Goldsworth Park London ​ — 17,334 — 928,129 (121,080) ​ — ​ 13,237 ​ — ​ 811,146 ​ 824,383 ​ (182,102) 2012 (A) 23 Waterloo Road Sydney ​ — 7,112 — 3,868 (3,564) ​ — ​ 4,804 ​ — ​ 2,612 ​ 7,416 ​ (500) 2012 (A) 1 Rue Jean-Pierre Paris ​ — 9,621 — 35,825 (6,820) ​ — ​ 8,177 ​ — ​ 30,449 ​ 38,626 ​ (7,732) 2012 (A) Liet-dit le Christ de Saclay Paris ​ — 3,402 — 3,090 (975) ​ — ​ 2,891 ​ — ​ 2,626 ​ 5,517 ​ (861) 2012 (A) 127 Rue de Paris Paris ​ — 8,637 — 10,838 (2,923) ​ — ​ 7,341 ​ — ​ 9,211 ​ 16,552 ​ (2,910) 2012 (A) 1900 S. Price Road Phoenix ​ — 5,380 — 16,975 (11,394) ​ — ​ 2,423 ​ — ​ 8,538 ​ 10,961 ​ (2,412) 2013 (A) 371 Gough Road Toronto ​ — 7,394 — 677 93,801 ​ — ​ 5,838 ​ — ​ 96,034 ​ 101,872 ​ (13,452) 2013 (A) 1500 Towerview Road Minneapolis ​ — 10,190 — 20,054 3,191 ​ — ​ 10,190 ​ — ​ 23,245 ​ 33,435 ​ (5,566) 2013 (A) Principal Park London ​ — 11,837 — — 76,060 ​ — ​ 7,097 ​ — ​ 80,800 ​ 87,897 ​ (13,080) 2013 (C) Liverpoolweg 10 Amsterdam ​ — 733 — 3,122 9,429 ​ — ​ 630 ​ — ​ 12,654 ​ 13,284 ​ (3,020) 2013 (A) DePresident Amsterdam ​ — 6,737 — — 116,399 ​ — ​ 6,996 ​ — ​ 116,140 ​ 123,136 ​ (5,534) 2013 (C) Crawley 2 London ​ — 24,305 — — 33,139 ​ — ​ 4,252 ​ — ​ 53,192 ​ 57,444 ​ (2,048) 2014 (C) 3 Loyang Way Singapore ​ — — — — 180,615 ​ — ​ — ​ — ​ 180,615 ​ 180,615 ​ (11,645) 2015 (A) Digital Loudoun III N. Virginia ​ — 43,000 — — 800,087 ​ — ​ 47,399 ​ — ​ 795,688 ​ 843,087 ​ (37,172) 2015 (C) Digital Frankfurt Frankfurt ​ — 5,543 — — 137,399 ​ — ​ 4,111 ​ — ​ 138,831 ​ 142,942 ​ (3,706) 2015 (C) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Costs capitalized ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ subsequent to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Initial costs ​ acquisition ​ Total costs ​ Accumulated ​ Date of ​ Acquisition ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ depreciation ​ acquisition ​ (A) or ​ ​ Metropolitan ​ ​ ​ ​ ​ ground ​ Buildings and ​ ​ ​ Carrying ​ ​ ​ ground ​ Buildings and ​ ​ ​ and ​ or ​ construction ​ Area Encumbrances Land lease improvements Improvements costs Land lease improvements Total amortization construction (C) 56 Marietta Street Atlanta (2) — 1,700 — 211,397 28,272 ​ — ​ 1,715 ​ — ​ 239,654 ​ 241,369 ​ (42,690) 2015 (A) 2 Peekay Drive New York (2) — — — 115,439 (16,103) ​ — ​ — ​ — ​ 99,336 ​ 99,336 ​ (23,282) 2015 (A) 100 Delawanna Avenue New York (2) — 3,600 — 85,438 11,712 ​ — ​ 3,600 ​ — ​ 97,150 ​ 100,750 ​ (14,734) 2015 (A) 60 Hudson Street New York (2) — — — 32,280 18,735 ​ — ​ — ​ — ​ 51,015 ​ 51,015 ​ (17,575) 2015 (A) 32 Avenue of the Americas New York (2) — — — 30,980 4,362 ​ — ​ — ​ — ​ 35,342 ​ 35,342 ​ (12,081) 2015 (A) 3433 S 120th Place Seattle (2) — — — 11,688 (1,312) ​ (5,351) ​ — ​ — ​ 5,025 ​ 5,025 ​ (5,024) 2015 (A) 8435 Stemmons Freeway Dallas (2) — — — 5,023 2,725 ​ — ​ — ​ — ​ 7,748 ​ 7,748 ​ (2,818) 2015 (A) 2625 Walsh Avenue Silicon Valley (2) — — — 4,276 9,051 ​ — ​ — ​ — ​ 13,327 ​ 13,327 ​ (4,017) 2015 (A) 111 8th Avenue - Telx New York (2) — — — 42,454 18,899 ​ — ​ — ​ — ​ 61,353 ​ 61,353 ​ (23,063) 2015 (A) 350 East Cermak Road - Telx Chicago (2) — — — 13,933 11,031 ​ — ​ — ​ — ​ 24,964 ​ 24,964 ​ (8,114) 2015 (A) 200 Paul Avenue - Telx San Francisco (2) — — — 6,719 4,632 ​ — ​ — ​ — ​ 11,351 ​ 11,351 ​ (3,864) 2015 (A) 2323 Bryan Street - Telx Dallas (2) — — — 5,191 5,621 ​ — ​ — ​ — ​ 10,812 ​ 10,812 ​ (3,728) 2015 (A) 600 W. 7th Street - Telx Los Angeles (2) — — — 3,689 8,050 ​ — ​ — ​ — ​ 11,739 ​ 11,739 ​ (3,018) 2015 (A) 3825 NW Aloclek Place - Telx Portland (2) — — — 3,131 1,347 ​ — ​ — ​ — ​ 4,478 ​ 4,478 ​ (1,857) 2015 (A) 120 E. Van Buren Street - Telx Phoenix (2) — — — 2,848 3,451 ​ — ​ — ​ — ​ 6,299 ​ 6,299 ​ (1,910) 2015 (A) 36 NE 2nd Street - Telx Miami (2) — — — 1,842 4,374 ​ — ​ — ​ — ​ 6,216 ​ 6,216 ​ (1,929) 2015 (A) 600-780 S. Federal Street - Telx Chicago (2) — — — 1,815 4,577 ​ — ​ — ​ — ​ 6,392 ​ 6,392 ​ (1,588) 2015 (A) 113 N. Myers Street - Telx Charlotte (2) — — — 476 1,142 ​ — ​ — ​ — ​ 1,618 ​ 1,618 ​ (482) 2015 (A) 1100 Space Park Drive - Telx Silicon Valley (2) — — — 352 2,265 ​ — ​ — ​ — ​ 2,617 ​ 2,617 ​ (484) 2015 (A) 300 Boulevard East - Telx New York (2) — — — 197 168 ​ — ​ — ​ — ​ 365 ​ 365 ​ (186) 2015 (A) Science Park Amsterdam (3) — 665 — 75,095 13,037 ​ — ​ — ​ — ​ 88,797 ​ 88,797 ​ (8,152) 2016 (A) Sovereign House London (3) — 7,943 — 75,184 58,238 ​ — ​ — ​ — ​ 141,365 ​ 141,365 ​ (20,816) 2016 (A) Amstel Business Park Amsterdam (3) — 2,991 — 58,138 12,448 ​ — ​ 3,028 ​ — ​ 70,549 ​ 73,577 ​ (20,491) 2016 (A) Olivers Yard London (3) — 7,943 — 34,744 2,357 ​ — ​ — ​ — ​ 45,044 ​ 45,044 ​ (13,783) 2016 (A) Bonnington House London (3) — — — 14,127 64,055 ​ — ​ — ​ — ​ 78,182 ​ 78,182 ​ (1,405) 2016 (A) West Drayton London (3) — — — 10,135 3,519 ​ — ​ — ​ — ​ 13,654 ​ 13,654 ​ (7,281) 2016 (A) Lyonerstrasse Frankfurt (3) — — — 8,407 6,393 ​ — ​ — ​ — ​ 14,800 ​ 14,800 ​ (5,137) 2016 (A) Meridian Gate London (3) — — — 5,893 1,621 ​ — ​ — ​ — ​ 7,514 ​ 7,514 ​ (3,829) 2016 (A) 2425-2553 Edgington Street Chicago ​ — 11,950 — 1,615 64 ​ — ​ 11,959 ​ — ​ 1,670 ​ 13,629 ​ (160) 2017 (C) 44520 Hastings Drive N. Virginia (4) 104,000 6,140 — 108,105 1,581 ​ — ​ 6,140 ​ — ​ 109,686 ​ 115,826 ​ (14,806) 2017 (A) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Costs capitalized ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ subsequent to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Initial costs ​ acquisition ​ Total costs ​ Accumulated ​ Date of ​ Acquisition ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Acquired ​ ​ ​ ​ ​ ​ ​ depreciation ​ acquisition ​ (A) or ​ ​ Metropolitan ​ ​ ​ ​ ​ ​ ​ ground ​ ​ Buildings and ​ ​ ​ ​ Carrying ​ ​ ​ ​ ground ​ Buildings and ​ ​ ​ ​ and ​ or ​ construction ​ Area Encumbrances Land lease improvements Improvements costs Land lease improvements Total amortization construction (C) 44480 Hastings Drive N. Virginia (4) ​ — ​ 12,860 ​ — ​ 278,384 ​ 1,227 ​ — ​ 12,860 ​ — ​ 279,611 ​ 292,471 ​ (38,147) 2017 (A) 44521 Hastings Drive N. Virginia (4) ​ — ​ 13,210 ​ — ​ 315,539 ​ 361 ​ — ​ 13,210 ​ — ​ 315,900 ​ 329,110 ​ (43,315) 2017 (A) 44461 Chilum Place N. Virginia (4) ​ — ​ 9,620 ​ — ​ 249,371 ​ 523 ​ — ​ 9,620 ​ — ​ 249,894 ​ 259,514 ​ (34,452) 2017 (A) 21625 Gresham Drive N. Virginia (4) ​ — ​ 17,500 ​ — ​ 448,968 ​ 488 ​ — ​ 17,500 ​ — ​ 449,456 ​ 466,956 ​ (62,151) 2017 (A) 2200 Busse Road Chicago (4) ​ — ​ 17,270 ​ — ​ 384,558 ​ 1,905 ​ — ​ 17,270 ​ — ​ 386,463 ​ 403,733 ​ (50,399) 2017 (A) 2299 Busse Road Chicago (4) ​ — ​ 12,780 ​ — ​ 348,348 ​ (1,687) ​ — ​ 12,780 ​ — ​ 346,661 ​ 359,441 ​ (47,004) 2017 (A) 1780 Business Center Drive N. Virginia (4) ​ — ​ 7,510 ​ — ​ 106,363 ​ 1,122 ​ — ​ 7,510 ​ — ​ 107,485 ​ 114,995 ​ (13,001) 2017 (A) 8217 Linton Hall Road N. Virginia (4) ​ — ​ 22,340 ​ — ​ 81,985 ​ 355 ​ — ​ 22,340 ​ — ​ 82,340 ​ 104,680 ​ (9,386) 2017 (A) 1400 East Devon Avenue Chicago (4) ​ — ​ 11,012 ​ — ​ 178,627 ​ 45,871 ​ — ​ 9,994 ​ — ​ 225,516 ​ 235,510 ​ (17,462) 2017 (A) 2220 De La Cruz Blvd Silicon Valley (4) ​ — ​ 84,650 ​ — ​ 634,007 ​ 4,588 ​ — ​ 84,650 ​ — ​ 638,595 ​ 723,245 ​ (81,549) 2017 (A) 1 Century Place Toronto (4) ​ — ​ 26,600 ​ — ​ 116,863 ​ 1,302 ​ — ​ 8,479 ​ — ​ 136,286 ​ 144,765 ​ (4,861) 2017 (C) 505 North Railroad Avenue Chicago ​ ​ — ​ 20,431 ​ — ​ 245,810 ​ (33,149) ​ — ​ 12,271 ​ — ​ 220,821 ​ 233,092 ​ (12,612) 2017 (A) 250 Williams Atlanta ​ ​ — ​ — ​ — ​ — ​ 26,774 ​ — ​ — ​ — ​ 26,774 ​ 26,774 ​ (5,240) 2017 (C) CME Agreement Chicago ​ ​ — ​ — ​ — ​ — ​ 42,875 ​ — ​ — ​ — ​ 42,875 ​ 42,875 ​ (21,741) 2017 (C) De President II Amsterdam ​ ​ — ​ 6,315 ​ — ​ — ​ 37,181 ​ — ​ 2,453 ​ — ​ 41,043 ​ 43,496 ​ — 2017 (C) 2825-2845 Lafayette Street Silicon Valley ​ ​ — ​ — ​ — ​ 2,941 ​ 60 ​ — ​ — ​ — ​ 3,001 ​ 3,001 ​ (3,001) 2018 (C) 21780 Filigree Court ​ N. Virginia ​ ​ — ​ ​ 24,315 ​ — ​ 3,039 ​ ​ 1,346 ​ — ​ 25,740 ​ — ​ 2,960 ​ 28,700 ​ (491) ​ 2019 ​ (C) Other ​ ​ ​ ​ — ​ — ​ — ​ — ​ 55,482 ​ — ​ 25 ​ — ​ 55,457 ​ 55,482 ​ (18,053) ​ ​ ​ ​ ​ ​ ​ ​ $ 105,089 ​ $ 930,961 ​ $ 13,509 ​ $ 8,327,303 ​ $ 7,620,170 ​ $ (5,351) ​ $ 804,830 ​ $ 10,725 ​ $ 16,071,037 ​ $ 16,886,592 ​ $ (4,536,169) ​ ​ ​ ​ (1) The balance shown excludes an unamortized premium of $54 . (2) Represents properties acquired in the Telx Acquisition. (3) Represents properties acquired in the European Portfolio Acquisition. (4) Represents properties acquired in the DFT Merger. (1) Tax Cost The aggregate gross cost of the Company’s properties for federal income tax purposes approximated $19.7 billion (unaudited) as of December 31, 2019. (2) Historical Cost and Accumulated Depreciation and Amortization The following table reconciles the historical cost of the Company’s properties for financial reporting purposes for each of the years in the three-year period ended December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Balance, beginning of year ​ $ 17,055,016 ​ $ 16,915,936 ​ $ 11,558,469 Additions during period (acquisitions and improvements) ​ 833,836 ​ 223,163 ​ 5,663,404 Deductions during period (dispositions, impairments and assets held for sale) ​ (1,002,260) ​ (84,083) ​ (305,937) Balance, end of year ​ $ 16,886,592 ​ $ 17,055,016 ​ $ 16,915,936 ​ The following table reconciles accumulated depreciation and amortization of the Company’s properties for financial reporting purposes for each of the years in the three-year period ended December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Balance, beginning of year ​ $ 3,935,267 ​ $ 3,238,227 ​ $ 2,668,509 Additions during period (depreciation and amortization expense) ​ 805,916 ​ 714,336 ​ 612,970 Deductions during period (dispositions and assets held for sale) ​ (205,014) ​ (17,296) ​ (43,252) Balance, end of year ​ $ 4,536,169 ​ $ 3,935,267 ​ $ 3,238,227 ​ Schedules other than those listed above are omitted because they are not applicable or the information required is included in the consolidated financial statements or the notes thereto.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Summary of Significant Accounting Policies
Principles of Consolidation and Basis of Presentation	The accompanying 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 notes to the 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 few differences between the Company and the Operating Partnership, which are reflected in these consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how we operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership. As a result, Digital Realty Trust, Inc. generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public securities from time to time and guaranteeing certain unsecured debt of the Operating Partnership and certain of its subsidiaries 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, 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 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 consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s 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 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 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: ● consolidated face financial statements; and ● the following notes to the consolidated financial statements: ● "Debt of the Company" and "Debt of the Operating Partnership"; ● "Income per Share" and "Income per Unit"; ● "Equity and Accumulated Other Comprehensive Loss, Net of the Company" and Capital and Accumulated Other Comprehensive Loss of the Operating Partnership"; and ● "Quarterly Financial Information". 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 consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of December 31, 2019 and 2018, cash equivalents consist of investments in money market instruments.
Investments in Real Estate	Investments in real estate are stated at cost, less accumulated depreciation and amortization. Land is not depreciated. Depreciation and amortization are recorded on a straight-line basis over the estimated useful lives as follows: ​ ​ ​ ​ Acquired ground leases Terms of the related lease Buildings and improvements ​ 5-39 years Machinery and equipment ​ 7-15 years Furniture and fixtures ​ 3-5 years Leasehold improvements ​ Shorter of the estimated useful lives or the terms of the related leases Tenant improvements ​ Shorter of the estimated useful lives or the terms of the related leases ​ Improvements and replacements are capitalized when they extend the useful life, increase capacity, or improve the efficiency of the asset. Repairs and maintenance are charged to expense as incurred. Assets that are classified as held for sale are recorded at the lower of their carrying value or fair value less costs to dispose. We classify an asset as held for sale once management has the authority to approve and commits to a plan to sell, the asset is available for immediate sale, an active program to locate a buyer has commenced and the sale of the asset is probable and transfer of the asset is expected to occur within one year. Upon the classification of assets as held for sale or sold, the depreciation and amortization of the assets will cease.
Investment in Unconsolidated Joint Ventures	(d) Investments in Unconsolidated Joint Ventures The Company’s investments in unconsolidated joint ventures are accounted for using the equity method. We use the equity method when we have the ability to exercise significant influence over operating and financial policies of the venture but do not have control of the entity. Under the equity method, we initially recognize these investments in the balance sheet at our cost or proportionate share of fair value. We subsequently adjust the accounts to reflect our proportionate share of net earnings or losses recognized and other comprehensive income or loss, distributions received, contributions made and certain other adjustments, as appropriate. We do not record losses of the joint ventures in excess of our investment balances unless we are liable for the obligations of the joint venture or are otherwise committed to provide financial support to the joint venture. Likewise, and as long as we have no explicit or implicit obligations to the joint venture, we will suspend equity method accounting to the extent that cash distributions exceed our investment balances until those unrecorded earnings exceed the excess distributions previously recognized in income. In this case, we will apply cost accounting concepts which tie income recognition to the receipt of cash. Cost basis accounting concepts will apply until earnings exceed the excess distributions previously recognized in income. We amortize the difference between the cost of our investment in the joint ventures and the book value of the underlying equity into income on a straight-line basis consistent with the lives of the underlying assets. In the event the underlying asset is goodwill, the difference is not amortized. The amortization of this difference was immaterial for each of the years ended December 31, 2019, 2018 and 2017.
Impairment of Long-Lived and Finite-Lived Intangible Assets	We review each of our properties for indicators that its carrying amount may not be recoverable. Examples of such indicators may include a significant decrease in the market price of the property, a change in the expected holding period for the property, a significant adverse change in how the property is being used or expected to be used based on the underwriting at the time of acquisition, an accumulation of costs significantly in excess of the amount originally expected for the acquisition or development of the property, or a history of operating or cash flow losses of the property. When such impairment indicators exist, we review an estimate of the future undiscounted net cash flows (excluding interest charges) expected to result from the property’s or asset group’s use and eventual disposition and compare that estimate to the carrying value of the property or the asset group. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If our future undiscounted net cash flow evaluation indicates that we are unable to recover the carrying value of a property or asset group, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property or fair value of the properties within the asset group. These losses have a direct impact on our net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results in future periods. Since cash flows on properties considered to be long-lived assets to be held and used are considered on an undiscounted basis to determine whether the carrying value of a property or asset group is recoverable, our strategy of holding properties over the long-term directly decreases the likelihood of their carrying values not being recoverable and therefore requiring the recording of an impairment loss. If our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized, and such loss could be material. If we determine that the asset fails the recoverability test, the affected assets must be reduced to their fair value. We generally estimate the fair value of rental properties utilizing a discounted cash flow analysis that includes projections of future revenues, expenses and capital improvement costs that a market participant would use based on the highest and best use of the asset, which is similar to the income approach that is commonly utilized by appraisers. In certain cases, we may supplement this analysis by obtaining outside broker opinions of value. In considering whether to classify a property as held for sale or contribution, the Company considers whether: (i) management has committed to a plan to sell or contribute the property; (ii) the property is available for immediate sale or contribution in its present condition; (iii) the Company has initiated a program to locate a buyer or joint venture partner; (iv) the Company believes that the sale or contribution of the property is probable; (v) the Company is actively marketing the property for sale or contribution at a price that is reasonable in relation to its current value; and (vi) actions required for the Company to complete the plan indicate that it is unlikely that any significant changes will be made to the plan. If all the above criteria are met, the Company classifies the property as held for sale or contribution. Assets classified as held for sale are expected to be sold to a third party and assets classified as held for contribution are expected to be contributed to an unconsolidated joint venture or to a third party within twelve months. At such time, the respective assets and liabilities are presented separately in the consolidated balance sheets and depreciation is no longer recognized. Assets held for sale or contribution are reported at the lower of their carrying amount or their estimated fair value less the costs to sell or contribute. Only those assets held for sale or contribution that constitute a strategic shift that has or will have a major effect on our operations are classified as discontinued operations. To date we have had no property dispositions or assets classified as held for sale or contribution that would meet the definition of discontinued operations. If impairment indicators arise with respect to intangible assets with finite useful lives, we evaluate impairment by comparing the carrying amount of the asset to the estimated future undiscounted net cash flows expected to be generated by the asset. If estimated future undiscounted net cash flows are less than the carrying amount of the asset, then we estimate the fair value of the asset and compare the estimated fair value to the intangible asset’s carrying value. We recognize any shortfall from carrying value as an impairment loss in the current period.
Purchase Accounting	Purchase accounting is applied to the assets and liabilities related to all real estate investments acquired from third parties. The Company evaluates the nature of the purchase to determine whether the purchase is a business combination or an asset acquisition. Transaction costs associated with business combinations are expensed as incurred while transaction costs associated with an asset acquisition are included in the total costs of the acquisition and are allocated on a pro-rata basis to the carrying value of the assets and liabilities recognized in connection with the acquisition. The following accounting policies related to valuing the acquired tangible and intangible assets and liabilities are applicable to both business combinations and asset acquisitions. However, in the event the purchase is an asset acquisition, no goodwill or gain is permitted to be recognized. In an asset acquisition, the difference between the sum of the identified tangible and intangible assets and liabilities and the total purchase price (including transactions costs) is allocated to the identified tangible and intangible assets and liabilities on a relative fair value basis. In accordance with current accounting guidance , The fair values of the tangible assets of an acquired property are determined based on comparable land sales for land and replacement costs adjusted for physical and market obsolescence for the improvements. The fair values of the tangible assets of an acquired property are also determined by valuing the property as if it were vacant, and the “as-if-vacant” value is then allocated to land, building and tenant improvements based on management’s determination of the relative fair values of these assets. Management determines the as-if-vacant fair value of a property based on assumptions that a market participant would use, which is similar to methods used by independent appraisers. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases. In estimating carrying costs, management includes real estate taxes, insurance and other operating expenses and estimates of lost rental revenue during the expected lease-up periods based on current market demand. Management also estimates costs to execute similar leases including leasing commissions, tenant improvements, legal and other related costs. In allocating the fair value of the identified intangible assets and liabilities of an acquired property, above-market and below-market in-place lease values are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) estimated fair market lease rates from the perspective of a market participant for the corresponding in-place leases, measured, for above-market leases, over a period equal to the remaining non-cancelable term of the lease and, for below-market leases, over a period equal to the initial term plus any below-market fixed rate renewal periods. The leases we have acquired do not currently include any below-market fixed rate renewal periods. The capitalized above-market lease values are amortized as a reduction of rental income over the remaining non-cancelable terms of the respective leases. The capitalized below-market lease values, also referred to as acquired lease obligations, are amortized as an increase to rental income over the initial terms of the respective leases and any below-market fixed rate renewal periods. In addition to the intangible value for above-market leases and the intangible negative value for below-market leases, there is intangible value related to having tenants leasing space in the purchased property, which is referred to as in-place lease value. Such value results primarily from the buyer of a leased property avoiding the costs associated with leasing the property and also avoiding rent losses and unreimbursed operating expenses during the lease-up period. Factors to be considered by management in its analysis of in-place lease values include an estimate of carrying costs during hypothetical expected lease-up periods considering current market conditions, and costs to execute similar leases. In estimating carrying costs, management includes real estate taxes, insurance and other operating expenses and estimates of lost rental revenue at market rates during the expected lease-up periods, depending on local market conditions. In estimating costs to execute similar leases, management considers leasing commissions, legal and other related expenses. The value of in-place leases is amortized to expense over the remaining initial terms of the respective leases. The Company uses the excess earnings method to value tenant relationship value, if any. Such value exists in transactions that involve the acquisition of tenants and customers that are expected to generate recurring revenues beyond existing in place lease terms. The primary factors to be considered by management in its analysis of tenant relationship value include historical tenant lease renewals and attrition rates, rental renewal probabilities and related market terms, estimated operating costs, and discount rate. Tenant relationship value is amortized to expense ratably over the anticipated life of the tenant relationships generating excess earnings, which is the period management uses to value this intangible asset.
Goodwill	Goodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired and tangible and intangible liabilities assumed in a business combination. Goodwill is not amortized. We perform an annual impairment test for goodwill and between annual tests, we evaluate goodwill for impairment whenever events or changes in circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value. In our impairment tests of goodwill, we first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If based on this assessment, we determine that the fair value of the reporting unit is not less than its carrying value, then performing the additional two-step impairment test is unnecessary. If our qualitative assessment indicates that goodwill impairment is more likely than not, we perform a two-step impairment test. We test goodwill for impairment under the two-step impairment test by first comparing the book value of net assets including goodwill to the fair value of the reporting unit. We estimate the fair value of the reporting unit using a technique based on a performance measure or measures consistent with the objective of measuring fair value, which may include quoted market prices, multiples of earnings or discounted cash flows. If the fair value is determined to be less than the book value of the net assets, including goodwill, a second step is performed to compute the amount of impairment as the difference between the implied fair value of goodwill and its carrying value. If the carrying value of goodwill exceeds its implied fair value, an impairment charge is recognized. We have not recognized any goodwill impairments since our inception. Since some of the goodwill is denominated in foreign currencies, changes to the goodwill balance occur over time due to changes in foreign currency exchange rates. The following is a summary of goodwill activity for the years ended December 31, 2019 and 2018 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impact of Change ​ Balance as of ​ ​ December 31, ​ Merger / ​ ​ ​ ​ Goodwill ​ in Foreign ​ December 31, Merger / Portfolio Acquisition 2018 Acquisition ​ Deconsolidation Adjustments (1) Exchange Rates 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Telx Acquisition ​ $ 330,845 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 330,845 European Portfolio Acquisition ​ 442,349 ​ — ​ — ​ (9,436) 7,166 ​ 440,079 DFT Merger ​ 2,592,146 ​ — ​ — ​ — — ​ 2,592,146 Ascenty Acquisition ​ 982,667 ​ — ​ (967,189) ​ — (15,478) ​ — Total ​ $ 4,348,007 ​ $ — ​ $ (967,189) ​ $ (9,436) ​ $ (8,312) ​ $ 3,363,070 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impact of Change ​ Balance as of ​ ​ December 31, ​ Merger / ​ ​ ​ ​ Goodwill ​ in Foreign ​ December 31, ​ ​ 2017 Acquisition ​ Deconsolidation Adjustments Exchange Rates 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Telx Acquisition ​ $ 330,845 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 330,845 European Portfolio Acquisition ​ 466,604 ​ — ​ — ​ — (24,255) ​ 442,349 DFT Merger ​ 2,592,146 ​ — ​ — ​ — — ​ 2,592,146 Ascenty Acquisition ​ — ​ 982,667 ​ — ​ — — ​ 982,667 Total ​ $ 3,389,595 ​ $ 982,667 ​ $ — ​ $ — ​ $ (24,255) ​ $ 4,348,007 ​ (1) As a result of a subsequent reduction to an acquired deferred tax liability that would not have impacted consideration paid, goodwill was adjusted.
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. During the development period, all costs including the associated land are classified to construction in progress and space held for development. Upon completion of the development period for a project, accumulated construction in progress costs including the land related to a project are allocated to the specific components of a project that are benefited. Construction in progress and space held for development includes the cost of land, the cost of construction of buildings, improvements and fixed equipment, and costs for design and engineering. Other costs, such as interest, legal, property taxes and corporate project supervision, which can be directly associated with the project during construction, are also included in construction in progress and space held for development. Land held for development includes parcels of land owned by the Company, upon which the Company intends to develop and own data centers, but has yet to commence development. During the years ended December 31, 2019, 2018 and 2017, we capitalized interest of approximately $40.2 million, $34.7 million and $21.7 million, respectively. During the years ended December 31, 2019, 2018 and 2017, we capitalized amounts relating to compensation expense and other overhead expense of employees direct and incremental to construction activities of approximately $50.3 million, $42.0 million and $38.0 million, respectively.
Deferred Leasing Costs	Leasing commissions and other direct and indirect costs associated with the acquisition of tenants are capitalized and amortized on a straight-line basis over the terms of the related leases. During the years ended December 31, 2019, 2018 and 2017, we capitalized amounts relating to fixed compensation expense and other overhead expense of employees direct and incremental to successful leasing activities of approximately $0.0 million, $37.0 million and $43.4 million, respectively. During the years ended December 31, 2019, 2018 and 2017, we capitalized amounts relating to variable compensation of employees direct and incremental to successful leasing activities of approximately $30.8 million, $27.2 million and $10.6 million, respectively. Deferred leasing costs is included in acquired in-place lease value, deferred leasing costs and intangibles on the consolidated balance sheet and amounted to approximately $291.8 million and $322.2 million, net of accumulated amortization, as of December 31, 2019 and 2018, respectively. Amortization expense on leasing costs was approximately $75.3 million, $72.9 million, and $50.1 million for the years ended December 31, 2019, 2018 and 2017, respectively.
Foreign Currency Translation	Assets and liabilities of our subsidiaries outside the United States with non-U.S. dollar functional currencies are translated into U.S. dollars using exchange rates as of the balance sheet dates. Income and expenses are translated using the average exchange rates for the reporting period. Foreign currency translation adjustments are recorded as a component of other comprehensive income. In the statement of cash flows, cash flows denominated in foreign currencies are translated using the exchange rates in effect at the time of the cash flows or an average exchange rate for the period, depending on the nature of the cash flow item.
Deferred Financing Costs	Loan fees and costs are recorded as an adjustment to the carrying amount of the related debt and amortized over the life of the related loans on a straight-line basis, which approximates the effective interest method. Such amortization is included as a component of interest expense.
Restricted Cash	Restricted cash consists of deposits for real estate taxes and insurance and other amounts as required by our loan agreements including funds for leasing costs and improvements related to unoccupied space.
Offering Costs	Underwriting commissions and other offering costs are reflected as a reduction in additional paid-in capital, or in the case of preferred stock, as a reduction of the carrying value of preferred stock.
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 15) 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 is not adjusted based on actual achievement of the market condition.
Derivative Instruments	Derivative financial instruments are employed to manage risks, including foreign currency and interest rate exposures and are not used for trading or speculative purposes. As part of the Company’s risk management program, a variety of financial instruments, such as interest rate swaps and foreign exchange contracts, may be used to mitigate interest rate exposure and foreign currency exposure. The Company recognizes all derivative instruments in the balance sheet at fair value. Changes in the fair value of derivatives are recognized periodically either in earnings or in stockholders’ equity as a component of accumulated other comprehensive income (loss), depending on whether the derivative financial instrument is undesignated or qualifies for hedge accounting, and if so, whether it represents a fair value, cash flow, or net investment hedge. Gains and losses on derivatives designated as cash flow hedges, to the extent they are included in the assessment of effectiveness, are recorded in other comprehensive income (loss) and subsequently reclassified to earnings to offset the impact of the hedged items when they occur. In the event it becomes probable the forecasted transaction to which a cash flow hedge relates will not occur, the derivative would be terminated and the amount in other comprehensive income (loss) would be recognized in earnings. Changes in the fair value of derivatives that are designated and qualify as a hedge of the net investment in foreign operations, to the extent they are included in the assessment of effectiveness, are reported in other comprehensive income (loss) and are deferred until disposal of the underlying assets. Gains and losses representing components excluded from the assessment of effectiveness for cash flow and fair value hedges are recognized in earnings on a straight-line basis in the same caption as the hedged item over the term of the hedge. Gains and losses representing components excluded from the assessment of effectiveness for net investment hedges are recognized in earnings on a straight-line basis over the term of the hedge. The net interest paid or received on interest rate swaps is recognized as interest expense. Gains and losses resulting from the early termination of interest rate swap agreements are deferred and amortized as adjustments to interest expense over the remaining period of the debt originally covered by the terminated swap. See Note 16 for further discussion on derivative instruments.
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 U.S. 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 U.S. federal income tax (including any applicable alternative minimum tax for taxable years prior to 2018) on its taxable income. The Company is subject to foreign, state and local income taxes in the jurisdictions in which it conducts business. The Company’s taxable REIT subsidiaries are subject to federal, state, local and foreign income taxes to the extent there is taxable income. Accordingly, the Company recognizes current and deferred income taxes for U.S. federal (for its taxable REIT subsidiaries), state, local and foreign 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 December 31, 2019 and 2018, 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 consolidated income statements. For the years ended December 31, 2019, 2018 and 2017, we had no such interest or penalties. The tax year 2016 and thereafter remain open to examination by the major taxing jurisdictions with which the Company files tax returns. See Note 12 for further discussion on income taxes.
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.
Redeemable Noncontrolling Interests	Redeemable noncontrolling interests include amounts related to partnership units issued by consolidated subsidiaries of the Company in which redemption for equity is outside the control of the Company. Partnership units which are determined to be contingently redeemable for cash under the Financial Accounting Standards Board’s "Distinguishing Liabilities from Equity" guidance are classified as redeemable noncontrolling interests and presented in the mezzanine section between total liabilities and stockholder’s equity on the Company’s consolidated balance sheets. The amounts of consolidated net income attributable to the Company and to the noncontrolling interests are presented on the Company’s consolidated income statements.
Lease Accounting	Transition On January 1, 2019, we adopted ASU No. 2016-02 “Leases” and the several additional ASU’s intended to clarify certain aspects of ASU 2016-02 and to provide certain practical expedients entities can elect upon adoption (collectively “Topic 842”). Topic 842 sets out the principles for the recognition, measurement, presentation, and disclosure of leases for both parties to a lease agreement (i.e., lessees and lessors). Upon adoption of the new lease accounting standard, we elected the following practical expedients and accounting policies provided by this lease standard: ● Package (“all or nothing” expedients) - requires us not to reevaluate our existing or expired leases as of January 1, 2019, under Topic 842 ; ● Optional transition method - requires us to apply Topic 842 prospectively from the effective date of adoption (i.e., January 1, 2019); ● Land easements - requires us to account for land easements existing as of January 1, 2019 , under the accounting standards applied to them prior to January 1, 2019; ● Lease and non-lease components (lessee) - requires us to account for lease and non-lease components associated with that lease under Topic 842 as a single lease component, for all classes of underlying assets; ● Lease and non-lease components (lessor) - requires us to account for lease and non-lease components associated with that lease under Topic 842 as a single lease component, if certain criteria are met, for all classes of underlying assets; and ● Short-term leases practical expedient (lessee) - for leases with a term of 12 months or less in which we are the lessee, this expedient requires us not to record on our balance sheets the related lease liabilities and right-of-use assets. Our election of the package of practical expedients and the optional transition method allowed us not to reassess: ● Whether any expired or existing contracts as of January 1, 2019 are or contain leases as defined in Topic 842; ● The lease classification for any expired or existing leases as of January 1, 2019; and ● Treatment of initial direct costs relating to any existing leases as of January 1, 2019. We applied the package of practical expedients consistently to all leases (i.e., in which we are the lessee or the lessor) that commenced before January 1, 2019. The election of this package permits us to “run off” our leases that commenced before January 1, 2019, for the remainder of their lease terms and to apply the new lease accounting standard to leases commencing or modified after January 1, 2019. For our leases that commenced prior to January 1, 2019, under the package of practical expedients and optional transition method, we are not required to reassess whether initial direct leasing costs capitalized prior to the adoption of the new lease accounting standard in connection with such leases qualify for capitalization under the new lease accounting standard. Therefore, we continue to amortize these initial direct leasing costs over their respective lease terms. In addition, we applied the modified retrospective transition method to build-to-suit leases for which assets and liabilities have been recognized solely as a result of the transactions’ build-to-suit designation in accordance with Topic 840. Therefore, we derecognized those assets and liabilities at the effective date of adoption for build-to-suit leases where construction had completed, with the difference of approximately $6.3 million recorded as an increase to accumulated dividends in excess of earnings at the adoption date. We accounted for the leases therefrom, following lessee transition guidance. The remainder of our capital leases were classified as finance leases and there was no change in their carrying value or classification at the adoption date. Under the package of practical expedients that we elected upon adoption of the new lease accounting standard, all of our operating leases existing as of January 1, 2019, in which we are the lessee, continue to be classified as operating leases subsequent to the adoption of the new lease accounting standard. In accordance with the new lease accounting standard, we were required to record an operating lease liability in our consolidated balance sheet equal to the present value of remaining future rental payments in which we are the lessee existing as of January 1, 2019 and the related operating lease right-of-use asset. Consequently, on January 1, 2019, we recorded an operating lease liability aggregating $757.2 million , which included approximately $73.3 million reclassified out of the deferred rent liabilities balance in accordance with the new lease standard. We have also recorded a corresponding operating lease right-of-use asset of $683.9 million. The present value of the remaining lease payments was calculated for each operating lease existing as of January 1, 2019, in which we were the lessee by using each respective remaining lease term and a corresponding estimated incremental borrowing rate. The incremental borrowing rate is the interest rate that we estimated we would have to pay to borrow on a collateralized basis over a similar term for an amount equal to the lease payments. Subsequent application of the new lease accounting guidance Definition of a lease Effective January 1, 2019, when we enter into a contract or amend an existing contract, we evaluate whether the contract meets the definition of a lease. To meet the definition of a lease, the contract must meet all three criteria: (i) One party (lessor) must hold an identified asset; (ii) The counterparty (lessee) must have the right to obtain substantially all of the economic benefits from the use of the asset throughout the period of the contract; and (iii) The counterparty (lessee) must have the right to direct the use of the identified asset throughout the period of the contract. Lease classification The new lease accounting standard also sets new criteria for determining the classification of finance leases for lessees and sales-type leases for lessors. The criteria to determine whether a lease should be accounted for as a finance/sales-type lease include any of the following: (i) Ownership is transferred from lessor to lessee by the end of the lease term; (ii) An option to purchase is reasonably certain to be exercised; (iii) The lease term is for the major part of the underlying asset’s remaining economic life; (iv) The present value of lease payments equals or exceeds substantially all of the fair value of the underlying asset; or (v) The underlying asset is specialized and is expected to have no alternative use at the end of the lease term. If any of these criteria is met, a lease is classified as a finance lease by the lessee and as a sales-type lease by the lessor. If none of the criteria are met, a lease is classified as an operating lease by the lessee but may still qualify as a direct financing lease or an operating lease for the lessor. The existence of a residual value guarantee from an unrelated third party other than the lessee may qualify the lease as a direct financing lease by the lessor. Otherwise, the lease is classified as an operating lease by the lessor. Therefore, under the new lease accounting standard, lessees apply a dual approach by classifying leases as either finance or operating leases based on the principle of whether the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease, which corresponds to a similar evaluation performed by lessors. ​ Lessor accounting ​ Costs to execute leases ​ The new lease accounting standard requires that lessors (and, if applicable, lessees) capitalize, as initial direct costs, only incremental costs of a lease that would not have been incurred if the lease had not been obtained. Costs that we incur to negotiate or arrange a lease, regardless of its outcome, such as for fixed employee compensation, tax, or legal advice to negotiate lease terms, and other costs, are expensed as incurred. ​ Operating leases ​ We account for the revenue from our lease contracts by utilizing the single component accounting policy. This policy requires us to account for, by class of underlying asset, the lease component and non-lease component(s) associated with each lease as a single component if two criteria are met: ​ (i) The timing and pattern of transfer of the lease component and the non-lease component(s) are the same; and ​ (ii) The lease component would be classified as an operating lease if it were accounted for separately. ​ Lease components consist primarily of fixed rental payments, which represent scheduled rental amounts due under our leases, and contingent rental payments. Non-lease components consist primarily of tenant recoveries representing reimbursements of rental operating expenses under our triple net lease structure, including recoveries for utilities, repairs and maintenance, and common area expenses. If a lessee makes payments for taxes and insurance directly to a third party on behalf of a lessor, lessors are required to exclude them from variable payments and from recognition in the lessors’ income statements. Otherwise, tenant recoveries for taxes and insurance are classified as additional lease revenue recognized by the lessor on a gross basis in their income statements. On January 1, 2019, we adopted the practical expedient that allowed us to not separate expenses reimbursed by our customers (“rental recoveries”) from the associated rental revenue if certain criteria were met. We assessed these criteria and concluded that the timing and pattern of transfer for rental revenue and the associated rental recoveries are the same and as our leases qualify as operating leases, we accounted for and presented rental revenue and rental recoveries as a single component under rental and other services in our consolidated income statement for the year ended December 31, 2019. Rental recoveries are classified as tenant reimbursement revenue in the accompanying consolidated income statements for the years ended December 31, 2018 and 2017 pursuant to Topic 840. Tenant recoveries are recognized as revenue in the period during which the applicable expenses are incurred and the tenant’s obligation to reimburse us arises. If the lease component is the predominant component, we account for all revenues under such lease as a single component in accordance with the new lease accounting standard. Conversely, if the non-lease component is the predominant component, all revenues under such lease are accounted for in accordance with the revenue recognition accounting standard. Our operating leases qualify for the single component accounting, and the lease component in each of our leases is predominant. Therefore, we account for all revenues from our operating leases under the new lease accounting standard and classify these revenues as rental and other services in our consolidated income statements. ​ We commence recognition of income from rentals related to the operating leases at the date the property is ready for its intended use by the tenant and the tenant takes possession, or controls the physical use, of the leased asset. Our leases are classified as operating leases and minimum rents are recognized on a straight-line basis over the terms of the leases, which may span multiple years. The excess of rents recognized over amounts contractually due pursuant to the underlying leases is included in deferred rent in the accompanying consolidated balance sheets and contractually due but unpaid rents are included in accounts and other receivables. As of December 31, 2019 and 2018, the balance of rent receivable, net of allowance, was $171.9 million and $185.7 million, respectively, and is classified within accounts and other receivables, net of allowance for doubtful accounts in the accompanying consolidated balance sheets. Amounts received currently but recognized as revenue in future periods are classified in accounts payable, accrued expenses, and other liabilities in our consolidated balance sheets. Lease termination fees are recognized over the remaining term of the lease, effective as of the date the lease modification is finalized, assuming collection is not considered doubtful. We recognize amortization of the value of acquired above or below-market tenant leases as a reduction of rental revenue in the case of above-market leases or an increase to rental revenue in the case of below-market leases. We make subjective estimates as to the probability of collection of substantially all lease payments over the term of a lease. We specifically analyze customer creditworthiness, accounts receivable and historical bad debts and current economic trends when evaluating the probability of collection. If collection of substantially all lease payments over the term of a lease is deemed not probable, rental revenue would be recognized when payment is received and revenue would not be recognized on a straight-line basis. We monitor the probability of collection over the lease term and in the event the collection of substantially all lease payments is no longer probable, we cease recognizing revenue on a straight-line basis and write-off the balance of all deferred rent related to the lease and commence recording rental revenue on a cash-basis. In addition, we record a full valuation allowance on the balance of any rent receivable, less the balance of any security deposits or letters of account. In the event that we subsequently determine the collection is probable, we resume recognizing rental revenue on a straight-line basis and record the incremental revenue such that the cumulative rental revenue is equal to the amount of revenue that would have been recorded on a straight-line basis since the inception of the lease. We also would reverse the allowance for bad debt recorded on the balance of accounts receivable.
Revenue Recognition	We adopted Topic 606 in the first quarter of 2018 using the modified retrospective transition method and applied Topic 606 to those contracts that were not completed as of January 1, 2018. The results for reporting periods beginning after January 1, 2018 were presented under Topic 606, while prior period amounts were not adjusted and continued to be presented under Topic 605. Our financial statements did not recognize a material effect from the cumulative impact of adopting Topic 606. The majority of our revenue is derived from lease arrangements, which we account for in accordance with “Leases (Topic 840)” prior to 2019 component and are recorded within rental revenue. Revenue recognized as a result of applying Topic 842 for 2019 and Topic 840 (prior to 2019) was 97% and Topic 606 was approximately 3% of total operating revenue for the years ended December 31, 2019 and 2018. Interconnection services are included in rental and other services on the consolidated income statements and are generally provided on a month-to-month, one-year or multi-year term. Interconnection services include port and cross-connect services. Port services are typically sold on a one-year or multi-year term and revenue is recognized on a recurring monthly basis (straight-line). The Company bills customers on a monthly basis and recognizes the revenue over the period the service is provided. Revenue for cross-connect installations is generally recognized in the period the cross-connect is installed. Interconnection services that are not specific to a particular space are accounted for under Topic 606 and have terms that are generally one year or less. Occasionally, customers engage the Company for certain services. The nature of these services historically involves property management and construction management. 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 whether certain performance milestones are met. Fee income arises primarily from contractual management 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 noncontrolled entities are recognized to the extent attributable to the unaffiliated interest.
Asset Retirement Obligations	We record accruals for estimated asset retirement obligations as required by current accounting guidance. The amount of asset retirement obligations relates primarily to estimated costs associated with asbestos removal at the end of the economic life of properties that were built before 1984 along with remediation of soil contamination issues. As of December 31, 2019 and 2018, the amount included in accounts payable and other accrued liabilities on our consolidated balance sheets was approximately $16.8 million and $17.5 million, respectively.
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.
Transaction and Integration Expense	Transaction and integration expense includes business combination expenses, other business development expenses and other expenses to integrate newly acquired investments, which are expensed as incurred. Transaction expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to business combinations or acquisitions that were not consummated. Integration costs include transition costs associated with organizational restructuring (such as severance and retention payments and recruiting expenses), third-party consulting expenses directly related to the integration of acquired companies (in areas such as cost savings and synergy realization, technology and systems work), and internal costs such as training, travel and labor, reflecting time spent by Company personnel on integration activities and projects. Recurring costs are recorded in general and administrative expense.
Gains on Disposition of Properties	(x) Gains on Disposition of Properties As of January 1, 2018, we began accounting for the sale or contribution of real estate properties under Financial Accounting Standards Board, or FASB, Accounting Standards Update, or ASU, No. 2017-05, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20), which provides for revenue recognition based on transfer of ownership. All properties were non-financial real estate assets and thus not businesses which were sold to noncustomers with no performance obligations subsequent to transfer of ownership. Prior to the adoption of Subtopic 610-20, we accounted for gains on sales of properties under 360-20, Property, Plant and Equipment — Real Estate Sales. Gains on sale of properties are recognized using the full accrual or partial sale methods, as applicable, provided various criteria relating to the terms of sale and any subsequent involvement with the real estate sold are satisfied.
Gain On Deconsolidation	(y) Gain on Deconsolidation We deconsolidate our subsidiaries in accordance with ASC 810, Consolidation, as of the date we cease to have a controlling financial interest in our subsidiaries. We account for the deconsolidation of our subsidiaries by recognizing a gain or loss in accordance with ASC 810. This gain or loss is measured at the date our subsidiaries are deconsolidated as the difference between (a) the aggregate of the fair value of any consideration received, the fair value of any retained non-controlling interest in our subsidiaries being deconsolidated, and the carrying amount of any non-controlling interest in our subsidiaries being deconsolidated, including any accumulated other comprehensive income/loss attributable to the non-controlling interest, and (b) the carrying amount of the assets and liabilities of our subsidiaries being deconsolidated.
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 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, tenant relationship value, goodwill, contingent consideration, accounts receivable and deferred rent receivable, performance-based equity compensation plans and the completeness of accrued liabilities. 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	The Company is managed on a consolidated basis based on customer demand considerations. Deployment of capital is geared to satisfy this demand. In this regard, the sale and delivery of our products is consistent throughout the portfolio. Services are provided to customers typical of the data center industry. Rent, and the cost of services are billed and collected. The Company has one operating segment and therefore one reporting segment. Operating revenues from properties in the United States were $2.6 billion, $2.5 billion and $1.9 billion and outside the United States were $627.4 million, $564.4 million and $515.2 million for the years ended December 31, 2019, 2018 and 2017, respectively. We had investments in real estate located in the United States of $10.6 billion, $11.1 billion and $10.5 billion and outside the United States of $3.7 billion, $3.8 billion and $3.1 billion as of December 31, 2019, 2018 and 2017, respectively. Operating revenues from properties located in the United Kingdom were $288.2 million, $295.3 million and $275.1 million, or 9.0 %, 9.7% and 11.2% of total operating revenues, for the years ended December 31, 2019, 2018 and 2017, respectively. No other foreign country comprised more than 10% of total operating revenues for each of these years. We had investments in real estate located in the United Kingdom of $1.7 billion, $1.6 billion and $1.7 billion, or 12.0 %, 10.9% and 12.1% of total investments in real estate, as of December 31, 2019, 2018 and 2017, respectively. No other foreign country comprised more than 10% of total investments in real estate as of each of December 31, 2019, 2018 and 2017.
New Accounting Pronouncements	New Accounting Standards Issued but not yet Adopted In January 2017, the FASB issued guidance codified in ASU No. 2017-04, "Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment". ASU No. 2017-04 simplifies the accounting for goodwill impairment by eliminating the process of measuring the implied value of goodwill, known as step two, from the goodwill impairment test. Instead, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. The standard will be effective for us as of January 1, 2020, with early adoption permitted. We do not expect the provisions of ASU No. 2017-04 to have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU amends existing fair value measurement disclosure requirements by adding, changing, or removing certain disclosures. ASU No. 2018-13 will be effective for us as of January 1, 2020, and earlier adoption is permitted. We are currently reviewing the impact this ASU will have on our consolidated financial statements. On June 16, 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), which amends the accounting for credit losses for certain financial instruments. ASU 2016-13 introduced the “current expected credit losses” (CECL) model, which requires companies to estimate credit losses immediately upon exposure. The guidance applies to financial assets measured at amortized cost including financing receivables (loans) and trade receivables. On November 26, 2018, the FASB issued ASU 2018-19, C (cc) Reclassification We have reclassified certain items in the December 31, 2018 consolidated balance sheet to conform to the current presentation as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As Previously ​ ​ ​ ​ ​ As ​ Reported ​ Adjustments ​ Revised Land ​ $ 1,509,764 ​ ​ $ (650,651) ​ ​ $ 859,113 Building and improvements ​ ​ 16,745,210 ​ ​ ​ (1,134,218) ​ ​ ​ 15,610,992 Construction in progress and space held for development ​ ​ — ​ ​ ​ 1,621,928 ​ ​ ​ 1,621,928 Land held for future development ​ ​ — ​ ​ ​ 162,941 ​ ​ ​ 162,941
Reclassifications	(cc) Reclassification We have reclassified certain items in the December 31, 2018 consolidated balance sheet to conform to the current presentation as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As Previously ​ ​ ​ ​ ​ As ​ Reported ​ Adjustments ​ Revised Land ​ $ 1,509,764 ​ ​ $ (650,651) ​ ​ $ 859,113 Building and improvements ​ ​ 16,745,210 ​ ​ ​ (1,134,218) ​ ​ ​ 15,610,992 Construction in progress and space held for development ​ ​ — ​ ​ ​ 1,621,928 ​ ​ ​ 1,621,928 Land held for future development ​ ​ — ​ ​ ​ 162,941 ​ ​ ​ 162,941

Organization and Description _2

Organization and Description of Business (Tables)	12 Months Ended
	Dec. 31, 2019
Organization and Description of Business
Schedule of Real Estate Properties	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Data Centers ​ ​ As of December 31, 2019 ​ As of December 31, 2018 ​ ​ ​ Unconsolidated ​ ​ ​ ​ Unconsolidated ​ Region ​ Operating ​ Held for Sale (1) ​ Joint Ventures ​ Total ​ Operating ​ Held for Sale ​ Joint Ventures ​ Total United States ​ 119 ​ 11 ​ 17 ​ 147 ​ 131 ​ — ​ 14 ​ 145 Europe 41 ​ — — 41 38 ​ — — 38 Latin America — ​ — 19 19 16 ​ — — 16 Asia 5 ​ — 5 10 3 ​ — 4 7 Australia 5 ​ — — 5 5 ​ — — 5 Canada 2 ​ 1 — 3 3 ​ — — 3 Total 172 ​ 12 41 225 196 ​ — 18 ​ 214 ​ (1) Includes 10 Powered Base Building® properties, which comprise 12 data centers, that are held for sale to a third party as of December 31, 2019 (see note 5).

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Summary of Significant Accounting Policies
Schedule of property and equipment	​ ​ ​ ​ Acquired ground leases Terms of the related lease Buildings and improvements ​ 5-39 years Machinery and equipment ​ 7-15 years Furniture and fixtures ​ 3-5 years Leasehold improvements ​ Shorter of the estimated useful lives or the terms of the related leases Tenant improvements ​ Shorter of the estimated useful lives or the terms of the related leases
Schedule of Goodwill	The following is a summary of goodwill activity for the years ended December 31, 2019 and 2018 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impact of Change ​ Balance as of ​ ​ December 31, ​ Merger / ​ ​ ​ ​ Goodwill ​ in Foreign ​ December 31, Merger / Portfolio Acquisition 2018 Acquisition ​ Deconsolidation Adjustments (1) Exchange Rates 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Telx Acquisition ​ $ 330,845 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 330,845 European Portfolio Acquisition ​ 442,349 ​ — ​ — ​ (9,436) 7,166 ​ 440,079 DFT Merger ​ 2,592,146 ​ — ​ — ​ — — ​ 2,592,146 Ascenty Acquisition ​ 982,667 ​ — ​ (967,189) ​ — (15,478) ​ — Total ​ $ 4,348,007 ​ $ — ​ $ (967,189) ​ $ (9,436) ​ $ (8,312) ​ $ 3,363,070 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impact of Change ​ Balance as of ​ ​ December 31, ​ Merger / ​ ​ ​ ​ Goodwill ​ in Foreign ​ December 31, ​ ​ 2017 Acquisition ​ Deconsolidation Adjustments Exchange Rates 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Telx Acquisition ​ $ 330,845 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 330,845 European Portfolio Acquisition ​ 466,604 ​ — ​ — ​ — (24,255) ​ 442,349 DFT Merger ​ 2,592,146 ​ — ​ — ​ — — ​ 2,592,146 Ascenty Acquisition ​ — ​ 982,667 ​ — ​ — — ​ 982,667 Total ​ $ 3,389,595 ​ $ 982,667 ​ $ — ​ $ — ​ $ (24,255) ​ $ 4,348,007
Schedule of reclassified adjustments in balance sheet	We have reclassified certain items in the December 31, 2018 consolidated balance sheet to conform to the current presentation as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As Previously ​ ​ ​ ​ ​ As ​ Reported ​ Adjustments ​ Revised Land ​ $ 1,509,764 ​ ​ $ (650,651) ​ ​ $ 859,113 Building and improvements ​ ​ 16,745,210 ​ ​ ​ (1,134,218) ​ ​ ​ 15,610,992 Construction in progress and space held for development ​ ​ — ​ ​ ​ 1,621,928 ​ ​ ​ 1,621,928 Land held for future development ​ ​ — ​ ​ ​ 162,941 ​ ​ ​ 162,941

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations
Summary of Preliminary Fair Value of Assets and Liabilities Acquired	The following table summarizes the provisional amounts for acquired assets and liabilities recorded at their fair values as of the acquisition date (in thousands): ​ ​ ​ ​ ​ Building and improvements $ 425,000 Goodwill ​ 982,667 Tenant relationship value ​ 375,000 Acquired in-place lease value ​ 120,000 Cash and cash equivalents ​ 116,000 Other assets ​ 30,000 Other liabilities ​ (40,000) Capital lease and other long-term obligations ​ (50,000) Total purchase price ​ $ 1,958,667 We acquired the following real estate during the years ended December 31, 2019 and 2018 (excluding business combinations already discussed in Note 3): 2019 Acquisitions ​ ​ ​ ​ ​ ​ ​ ​ Amount Property Type (in millions) (2) Land parcels (1) ​ $ 47.7 Technology office (3) ​ 28.0 ​ ​ ​ $ 75.7 ​ 2018 Acquisitions ​ ​ ​ ​ ​ ​ Amount Property Type ​ (in millions) (2) Land Parcels (1) ​ $ 296.1 Data Centers ​ 114.6 ​ ​ $ 410.7 (1) Represents currently vacant land which is not included in our operating property count. (2) Purchase price in U.S. dollars and excludes capitalized closing costs. (3) Property to be redeveloped. ​ The table below reflects the purchase price allocation for the above properties acquired in 2019 and 2018 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Above- ​ ​ Below- Acquisition ​ ​ ​ ​ ​ Buildings and ​ Tenant ​ Market ​ In-Place ​ Market ​ Date Fair Property Type ​ Land ​ Improvements ​ Improvements ​ Leases ​ Leases ​ Leases ​ Value 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Land Parcels ​ $ 47,712 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 47,712 Technology office ​ 24,315 ​ 3,039 ​ — ​ — ​ 638 ​ — ​ 27,992 Total ​ $ 72,027 ​ $ 3,039 ​ $ — ​ $ — ​ $ 638 ​ $ — ​ $ 75,704 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2018 ​ ​ ​ ​ ​ ​ ​ Land Parcels ​ $ 296,071 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 296,071 Data Centers ​ 60,633 ​ 54,008 ​ — ​ — ​ — ​ — ​ 114,641 Total ​ $ 356,704 ​ $ 54,008 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 410,712

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases
Supplemental Balance Sheet Information	Supplemental balance sheet information related to leases as of December 31, 2019 was as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ Balance Sheet Balance as of ​ ​ Classification ​ December 31, 2019 Assets: ​ Operating lease assets Operating lease right-of-use assets, net (1) ​ $ 628,681 Finance lease assets Buildings and improvements, net (2) ​ 131,072 Total leased assets ​ $ 759,753 ​ ​ ​ ​ ​ ​ Liabilities: ​ Operating lease liabilities Operating lease liabilities ​ $ 693,539 Finance lease liabilities Accounts payable and other accrued liabilities ​ 178,086 Total lease liabilities ​ $ 871,625 ​ _________________________ (1) Net of accumulated depreciation and amortization of $51.7 million as of December 31, 2019. (2) Net of accumulated depreciation and amortization of $4.9 million as of December 31, 2019.
Lease, Cost	The components of lease expense for the year ended December 31, 2019 were as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended Lease cost ​ Income Statement Classification ​ December 31, 2019 ​ ​ ​ ​ ​ ​ Finance lease cost: ​ Amortization of right-of-use assets Depreciation and amortization ​ $ 5,074 Interest on lease liabilities Interest expense ​ 6,044 Operating lease cost Rental property operating and maintenance / General and administrative ​ 90,980 Total lease cost ​ $ 102,098
Schedule of Future Minimum Rental Payments for Operating Leases	The minimum commitment under operating leases, excluding fully prepaid ground leases, as of December 31, 2018 was as follows (in thousands): ​ ​ ​ ​ ​ 2019 $ 84,712 2020 ​ 87,396 2021 ​ 86,212 2022 ​ 81,976 2023 ​ 80,707 Thereafter ​ 539,047 Total ​ $ 960,050
Schedule of Future Minimum Lease Payments for Capital Leases	Future minimum lease payments and their present value for property under capital lease obligations as of December 31, 2018, are as follows (in thousands): ​ ​ ​ ​ ​ 2019 $ 11,657 2020 ​ 13,108 2021 ​ 13,207 2022 ​ 13,706 2023 ​ 14,219 Thereafter ​ 285,774 ​ ​ 351,671 Less amount representing interest ​ (137,827) Present value ​ $ 213,844
Finance Leases Maturity	Maturities of lease liabilities as of December 31, 2019 were as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Finance ​ ​ lease liabilities ​ lease liabilities 2020 ​ $ 85,277 ​ $ 8,881 2021 ​ 84,796 ​ 8,927 2022 ​ 81,021 ​ 9,399 2023 ​ 79,751 ​ 9,865 2024 ​ 73,612 ​ 9,914 Thereafter ​ 478,241 ​ 226,261 Total undiscounted future cash flows ​ 882,698 ​ 273,247 Less: Imputed interest ​ (189,159) ​ (95,161) Present value of undiscounted future cash flows ​ $ 693,539 ​ $ 178,086
Operating Lease Maturity	​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Finance ​ ​ lease liabilities ​ lease liabilities 2020 ​ $ 85,277 ​ $ 8,881 2021 ​ 84,796 ​ 8,927 2022 ​ 81,021 ​ 9,399 2023 ​ 79,751 ​ 9,865 2024 ​ 73,612 ​ 9,914 Thereafter ​ 478,241 ​ 226,261 Total undiscounted future cash flows ​ 882,698 ​ 273,247 Less: Imputed interest ​ (189,159) ​ (95,161) Present value of undiscounted future cash flows ​ $ 693,539 ​ $ 178,086
Lessor Operating Minimum Lease Payments	The following table summarizes the minimum lease payments due from our customers on leases with lease periods greater than one year for space in our operating properties, prestabilized development properties and leases of land subject to ground leases at December 31, 2019 (in thousands): ​ ​ ​ ​ ​ ​ Operating leases 2020 ​ $ 2,810,508 2021 ​ 1,947,216 2022 ​ 1,552,045 2023 ​ 1,333,620 2024 ​ 1,089,305 Thereafter ​ 4,091,199 Total ​ $ 12,823,893

Investments in Real Estate (Tab

Investments in Real Estate (Tables)	12 Months Ended
	Dec. 31, 2019
Investments in Real Estate.
Schedule of Properties Acquired	​ The table below reflects the purchase price allocation for the above properties acquired in 2019 and 2018 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Above- ​ ​ Below- Acquisition ​ ​ ​ ​ ​ Buildings and ​ Tenant ​ Market ​ In-Place ​ Market ​ Date Fair Property Type ​ Land ​ Improvements ​ Improvements ​ Leases ​ Leases ​ Leases ​ Value 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Land Parcels ​ $ 47,712 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 47,712 Technology office ​ 24,315 ​ 3,039 ​ — ​ — ​ 638 ​ — ​ 27,992 Total ​ $ 72,027 ​ $ 3,039 ​ $ — ​ $ — ​ $ 638 ​ $ — ​ $ 75,704 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2018 ​ ​ ​ ​ ​ ​ ​ Land Parcels ​ $ 296,071 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 296,071 Data Centers ​ 60,633 ​ 54,008 ​ — ​ — ​ — ​ — ​ 114,641 Total ​ $ 356,704 ​ $ 54,008 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 410,712
Schedule of Real Estate Property Acquisitions	The following table summarizes the provisional amounts for acquired assets and liabilities recorded at their fair values as of the acquisition date (in thousands): ​ ​ ​ ​ ​ Building and improvements $ 425,000 Goodwill ​ 982,667 Tenant relationship value ​ 375,000 Acquired in-place lease value ​ 120,000 Cash and cash equivalents ​ 116,000 Other assets ​ 30,000 Other liabilities ​ (40,000) Capital lease and other long-term obligations ​ (50,000) Total purchase price ​ $ 1,958,667 We acquired the following real estate during the years ended December 31, 2019 and 2018 (excluding business combinations already discussed in Note 3): 2019 Acquisitions ​ ​ ​ ​ ​ ​ ​ ​ Amount Property Type (in millions) (2) Land parcels (1) ​ $ 47.7 Technology office (3) ​ 28.0 ​ ​ ​ $ 75.7 ​ 2018 Acquisitions ​ ​ ​ ​ ​ ​ Amount Property Type ​ (in millions) (2) Land Parcels (1) ​ $ 296.1 Data Centers ​ 114.6 ​ ​ $ 410.7 (1) Represents currently vacant land which is not included in our operating property count. (2) Purchase price in U.S. dollars and excludes capitalized closing costs. (3) Property to be redeveloped. ​ The table below reflects the purchase price allocation for the above properties acquired in 2019 and 2018 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Above- ​ ​ Below- Acquisition ​ ​ ​ ​ ​ Buildings and ​ Tenant ​ Market ​ In-Place ​ Market ​ Date Fair Property Type ​ Land ​ Improvements ​ Improvements ​ Leases ​ Leases ​ Leases ​ Value 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Land Parcels ​ $ 47,712 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 47,712 Technology office ​ 24,315 ​ 3,039 ​ — ​ — ​ 638 ​ — ​ 27,992 Total ​ $ 72,027 ​ $ 3,039 ​ $ — ​ $ — ​ $ 638 ​ $ — ​ $ 75,704 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2018 ​ ​ ​ ​ ​ ​ ​ Land Parcels ​ $ 296,071 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 296,071 Data Centers ​ 60,633 ​ 54,008 ​ — ​ — ​ — ​ — ​ 114,641 Total ​ $ 356,704 ​ $ 54,008 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 410,712
Schedule of Dispositions	We sold the following real estate properties during the years ended December 31, 2019 and 2018: 2019 Dispositions ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Gain on contribution Location / Portfolio ​ Metro Area ​ Date Sold ​ (in millions) ​ (in millions) Mapletree portfolio (1) Northern Virginia ​ Nov 1, 2019 ​ $ 996.6 ​ $ 266.0 ​ (1) Consists of three data centers that were contributed to a joint venture (see note 6). ​ 2018 Dispositions ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Proceeds Gain on Sale Location ​ Metro Area ​ Date Sold ​ (in millions) ​ (in millions) 200 Quannapowitt Parkway ​ Boston ​ Jan 25, 2018 ​ $ 15.0 ​ $ (0.4) 34551 Ardenwood Boulevard ​ ​ Silicon Valley ​ ​ Feb 9, 2018 ​ ​ 73.3 ​ ​ 25.3 3065 Gold Camp Drive ​ ​ Sacramento ​ ​ Mar 14, 2018 ​ ​ 14.2 ​ ​ 5.4 11085 Sun Center Drive ​ ​ Sacramento ​ ​ Mar 14, 2018 ​ ​ 36.8 ​ ​ 9.1 Austin Portfolio ​ ​ Austin ​ ​ Apr 19, 2018 ​ ​ 47.6 ​ ​ 12.0 2010 East Centennial Circle ​ ​ Phoenix ​ ​ May 22, 2018 ​ ​ 5.5 ​ ​ (0.5) 1125 Energy Park Drive ​ Minneapolis ​ ​ May 31, 2018 ​ 7.0 ​ 2.8 360 Spear Street ​ San Francisco ​ ​ Sep 21, 2018 ​ 92.3 ​ 26.7 ​ ​ ​ ​ ​ ​ ​ ​ $ 291.7 ​ $ 80.4

Investments in Unconsolidated_2

Investments in Unconsolidated Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2019
Investments in Unconsolidated Joint Ventures
Summary of Financial Information for Joint Ventures	As of December 31, 2019 and 2018, our investments in unconsolidated joint ventures accounted for under the equity method of accounting presented in our consolidated balance sheets consist of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Joint ​ # of Metropolitan ​ Balance as of Balance as of Joint Venture ​ Venture Formed ​ Data Centers ​ Area ​ % Ownership ​ December 31, 2019 ​ December 31, 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ascenty (1)(3) ​ 2019 ​ 19 Brazil / Chile 51 % (2) $ 774,853 ​ $ — Mapletree ​ 2019 ​ 3 ​ Northern Virginia ​ 20 % ​ 208,354 ​ ​ — Mitsubishi ​ 2017 ​ 4 Osaka / Tokyo 50 % 200,652 ​ 66,835 CenturyLink ​ 2012 ​ 1 Hong Kong 50 % 88,647 ​ 96,094 Other ​ Various ​ 14 U.S. Various ​ 14,603 ​ 12,179 Total ​ ​ ​ 41 ​ $ 1,287,109 ​ $ 175,108 (1) Our maximum exposure to loss related to this unconsolidated variable interest entity (VIE) is limited to our equity investment in this VIE. (2) Includes an approximate 2% ownership interest held by a non-controlling interest in our entity that holds the investment in the Ascenty joint venture, which has a carrying value of approximately $25.0 million and is classified with redeemable noncontrolling interests in our consolidated balance sheet. (3) See note 3 for additional information on the Ascenty joint venture.

Acquired Intangible Assets an_2

Acquired Intangible Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Acquired Intangible Assets and Liabilities
Summary of Acquired Intangible Assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of (Amounts in thousands) December 31, 2019 December 31, 2018 Real Estate Intangibles: ​ ​ ​ ​ ​ ​ Acquired in-place lease value: ​ ​ ​ ​ ​ ​ Gross amount ​ $ 1,357,190 ​ $ 1,569,401 Accumulated amortization ​ (899,071) ​ (795,033) Net ​ $ 458,119 ​ $ 774,368 Tenant relationship value: ​ ​ Gross amount ​ $ 1,845,949 ​ $ 2,339,606 Accumulated amortization ​ (400,570) ​ (291,818) Net ​ $ 1,445,379 ​ $ 2,047,788 Acquired above-market leases: ​ ​ Gross amount ​ $ 279,048 ​ $ 277,796 Accumulated amortization ​ (204,233) ​ (158,037) Net ​ $ 74,815 ​ $ 119,759 Acquired below-market leases: ​ ​ Gross amount ​ $ 396,509 ​ $ 442,535 Accumulated amortization ​ (247,735) ​ (242,422) Net ​ $ 148,774 ​ $ 200,113
Schedule of Estimated Annual Amortization of Below Market Leases	​ ​ ​ ​ ​ (Amounts in thousands) ​ ​ 2020 ​ $ (10,648) 2021 ​ (3,501) 2022 ​ 4,735 2023 ​ 9,500 2024 ​ 10,149 Thereafter ​ 63,724 Total ​ $ 73,959
Schedule of Estimated Annual Amortization of Acquired of Intangible Assets	Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing January 1, 2020 is as follows:Estimated annual amortization of tenant relationship value for each of the five succeeding years and thereafter, commencing January 1, 2020 is as follows:

Debt of the Operating Partner_2

Debt of the Operating Partnership (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Instrument [Line Items]
Summary of Senior Notes, Amounts Issued	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Issued (in ​ ​ ​ ​ ​ ​ ​ Unsecured Senior Notes and Annual ​ ​ ​ Maturity ​ millions, local ​ Net Proceeds ​ Interest Payment ​ ​ Interest Rate ​ Date Issued ​ Date ​ currency) ​ (in millions) (1) ​ Dates ​ Initial Issuer (2) 3.950% Notes due 2022 ​ Jun 23, 2015 ​ Jul 1, 2022 ​ $ 500.0 ​ 491.8 Semi-annually, commencing January 1, 2016 Digital Realty Trust, L.P. 3.625% Notes due 2022 ​ Sep 24, 2012 ​ Oct 1, 2022 ​ $ 300.0 ​ 293.1 Semi-annually, commencing April 1, 2013 Digital Realty Trust, L.P. 2.750% Notes due 2023 ​ Aug 7, 2017 ​ Feb 1, 2023 ​ $ 350.0 ​ 346.9 Semi-annually, commencing February 1, 2018 Digital Realty Trust, L.P. 4.750% Notes due 2023 ​ Apr 1, 2014 ​ Oct 13, 2023 ​ £ 300.0 ​ 490.9 Semi-annually, commencing October 13, 2014 Digital Stout Holding, LLC (3) 2.625% Notes due 2024 ​ Apr 15, 2016 ​ Apr 15, 2024 ​ € 600.0 ​ 670.3 Annually, commencing April 15, 2017 Digital Euro Finco, LLC (3) 2.750% Notes due 2024 ​ Jul 21, 2017 ​ Jul 19, 2024 ​ £ 250.0 ​ 321.3 Annually, commencing July 19, 2018 Digital Stout Holding, LLC (3) 4.250% Notes due 2025 ​ Jan 18, 2013 ​ Jan 17, 2025 ​ £ 400.0 ​ 624.2 Semi-annually, commencing July 17, 2013 Digital Stout Holding, LLC (3) 4.750% Notes due 2025 ​ Oct 1, 2015 ​ Oct 1, 2025 ​ $ 450.0 ​ 445.8 Semi-annually, commencing April 1, 2016 Digital Delta Holdings, LLC (4) 2.500% Notes due 2026 ​ Jan 16, 2019 ​ Jan 16, 2026 ​ € 1,075.0 ​ ​ 1,218.6 ​ Annually, commencing January 16, 2020 ​ Digital Euro Finco, LLC (3) 3.700% Notes due 2027 ​ Aug 7, 2017 ​ Aug 15, 2027 ​ $ 1,000.0 ​ 991.0 Semi-annually, commencing February 15, 2018 Digital Realty Trust, L.P. 1.125% Notes due 2028 ​ Oct 9, 2019 ​ Apr 9, 2028 ​ € 500.0 ​ ​ 539.7 ​ Annually, commencing April 9, 2020 ​ Digital Euro Finco, LLC (3) 4.450% Notes due 2028 ​ Jun 21, 2018 ​ Jul 15, 2028 ​ $ 650.0 ​ 643.3 Semi-annually, commencing January 15, 2019 Digital Realty Trust, L.P. 3.600% Notes due 2029 ​ Jun 14, 2019 ​ Jul 1, 2029 ​ $ 900.0 ​ ​ 890.6 ​ Semi-annually, commencing January 1, 2020 ​ Digital Realty Trust, L.P. 3.300% Notes due 2029 ​ Jul 21, 2017 ​ Jul 19, 2029 ​ £ 350.0 ​ 448.6 Annually, commencing July 19, 2018 Digital Stout Holding, LLC (3) 3.750% Notes due 2030 ​ Oct 17, 2018 and Mar 9, 2019 ​ Oct 17, 2030 ​ £ 550.0 ​ 716.8 Annually, commencing October 17, 2019 Digital Stout Holding, LLC (3) (1) Amounts are in U.S. dollars, based on the exchange rate on the date of issuance. Net proceeds are equal to principal amount less initial purchaser discount and other debt issuance costs. (2) Digital Realty Trust, Inc. guarantees the senior notes issued by Digital Realty Trust, L.P. Both Digital Realty Trust, L.P. and Digital Realty Trust, Inc. guarantee the senior notes issued by Digital Stout Holding, LLC and Digital Euro Finco, LLC. (3) A wholly owned subsidiary of Digital Realty Trust, L.P. (4) Initially a wholly owned subsidiary of Digital Realty Trust, Inc., pursuant to the terms of the indenture, following the consummation of the Telx Acquisition, on October 13, 2015, Digital Delta Holdings, LLC merged with and into Digital Realty Trust, L.P., with Digital Realty Trust, L.P. surviving the merger and assuming Digital Delta Holdings, LLC’s obligations under the 4.750% 2025 Notes, the related indenture and registration rights agreement by operation of law. ​
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Summary of Outstanding Indebtedness of the Operating Partnership	A summary of outstanding indebtedness of the Operating Partnership as of December 31, 2019 and 2018 is as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate at ​ ​ Principal Principal ​ ​ December 31, ​ ​ ​ Outstanding at ​ Outstanding at ​ Indebtedness ​ 2019 ​ Maturity Date ​ December 31, 2019 ​ December 31, 2018 ​ Global revolving credit facilities Various (1) ​ Jan 24, 2023 (1) $ 245,766 (2) $ 1,663,156 (2) Deferred financing costs, net ​ ​ ​ (11,661) ​ (15,421) ​ Global revolving credit facilities, net ​ ​ ​ 234,105 ​ 1,647,735 ​ Unsecured Term Loans ​ ​ ​ ​ ​ 2019 Term Loan Base Rate + 1.000 % ​ Jan 19, 2019 ​ — ​ 375,000 ​ 2023 Term Loan Various (3)(4) ​ Jan 15, 2023 ​ 300,000 (5) 300,000 (5) 2024 Term Loan Various (3)(4) ​ Jan 24, 2023 ​ 513,205 (5) 508,120 (5) Deferred financing costs, net ​ ​ ​ ​ (2,986) ​ (4,216) ​ Unsecured term loans, net ​ ​ ​ ​ 810,219 ​ 1,178,904 ​ Unsecured senior notes: ​ ​ ​ ​ ​ ​ Floating rate notes due 2019 EURIBOR + 0.500 % ​ May 22, 2019 ​ — (11) 143,338 (6) 5.875% notes due 2020 5.875 % ​ Feb 1, 2020 ​ — (8) 500,000 ​ 3.400% notes due 2020 3.400 % ​ Oct 1, 2020 ​ — (12) 500,000 ​ 5.250% notes due 2021 5.250 % ​ Mar 15, 2021 ​ — (12) 400,000 ​ 3.950% notes due 2022 3.950 % ​ Jul 1, 2022 ​ 500,000 ​ 500,000 ​ 3.625% notes due 2022 3.625 % ​ Oct 1, 2022 ​ 300,000 ​ 300,000 ​ 2.750% notes due 2023 2.750 % ​ Feb 1, 2023 ​ 350,000 ​ 350,000 ​ 4.750% notes due 2023 4.750 % ​ Oct 13, 2023 ​ 397,710 (7) 382,620 (7) 2.625% notes due 2024 2.625 % ​ Apr 15, 2024 ​ 672,780 (6) 688,020 (6) 2.750% notes due 2024 2.750 % ​ Jul 19, 2024 ​ 331,425 (7) 318,850 (7) 4.250% notes due 2025 4.250 % ​ Jan 17, 2025 ​ 530,280 (7) 510,160 (7) 4.750% notes due 2025 4.750 % ​ Oct 1, 2025 ​ 450,000 ​ 450,000 ​ 2.500% notes due 2026 ​ 2.500 % ​ Jan 16, 2026 ​ ​ 1,205,398 (6) ​ — ​ 3.700% notes due 2027 3.700 % ​ Aug 15, 2027 ​ 1,000,000 ​ 1,000,000 ​ 1.125% notes due 2028 ​ 1.125 % ​ Apr 9, 2028 ​ ​ 560,650 (6) ​ — ​ 4.450% notes due 2028 4.450 % ​ Jul 15, 2028 ​ 650,000 ​ 650,000 ​ 3.600% notes due 2029 ​ 3.600 % ​ Jul 1, 2029 ​ ​ 900,000 ​ ​ — ​ 3.300% notes due 2029 3.300 % ​ Jul 19, 2029 ​ 463,995 (7) 446,390 (7) 3.750% notes due 2030 3.750 % ​ Oct 17, 2030 ​ 729,135 (7)(9) 510,160 (7) Unamortized discounts, net of premiums ​ ​ (16,145) ​ (19,859) ​ Total senior notes, net of discount ​ ​ 9,025,228 ​ 7,629,679 ​ Deferred financing costs, net ​ ​ (52,038) ​ (40,553) ​ Total unsecured senior notes, net of discount and deferred financing costs ​ ​ 8,973,190 ​ 7,589,126 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Secured Debt: ​ ​ ​ ​ 731 East Trade Street 8.22 % ​ Jul 1, 2020 ​ $ 1,089 ​ $ 1,776 ​ Secured note due March 2023 LIBOR + 1.000 % (4) ​ Mar 1, 2023 ​ 104,000 ​ 104,000 ​ Secured note due December 2023 Base Rate + 4.250 % ​ Dec 20, 2023 ​ — (10) 600,000 ​ Unamortized net premiums ​ ​ 54 ​ 148 ​ Total secured debt, including premiums ​ ​ 105,143 ​ 705,924 ​ Deferred financing costs, net ​ ​ (209) ​ (20,210) ​ Total secured debt, including premiums and net of deferred financing costs ​ ​ 104,934 ​ 685,714 ​ Total indebtedness ​ ​ $ 10,122,448 ​ $ 11,101,479 ​ (1) The interest rate for borrowings under the global revolving credit facility equals the applicable index plus a margin of 90 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. The interest rate for borrowings under the Yen revolving credit facility equals the applicable index plus a margin of 50 basis points, which is based on the current credit ratings of our long-term debt. (2) Balances as of December 31, 2019 and December 31, 2018 are as follows (balances, in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of Weighted- Balance as of Weighted- ​ ​ December 31, ​ average ​ December ​ average Denomination of Draw ​ 2019 ​ interest rate ​ 31, 2018 ​ interest rate Floating Rate Borrowing (a) (d) ​ ​ ​ U.S. dollar ($) ​ $ — ​ — % $ 890,000 ​ 3.37 % British pound sterling (£) ​ — ​ — % 8,290 (c) 1.61 % Euro (€) ​ 44,852 (b) 0.90 % 451,800 (c) 0.90 % Australian dollar (AUD) ​ 1,264 (b) 1.74 % 27,632 (c) 2.82 % Hong Kong dollar (HKD) ​ — ​ — % 8,797 (c) 3.14 % Japanese yen (JPY) ​ — ​ — % 4,105 (c) 0.90 % Singapore dollar (SGD) ​ 53,199 (b) 2.46 % 77,112 (c) 2.79 % Canadian dollar (CAD) ​ — ​ — % 60,856 (c) 3.16 % Total ​ $ 99,315 1.75 % $ 1,528,592 2.57 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Yen Revolving Credit Facility (a) ​ $ 146,451 (e) 0.50 % $ 134,564 (e) 0.50 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total borrowings ​ $ 245,766 1.00 % $ 1,663,156 2.41 % (a) The interest rates for floating rate borrowings under the global revolving credit facility currently equal the applicable index plus a margin of 90 basis points, which is based on the credit rating of our long-term debt. The interest rate for borrowings under the Yen revolving credit facility equals the applicable index plus a margin of 50 basis points, which is based on the current credit rating of our long-term debt. (b) Based on exchange rates of $1.12 to €1.00, $0.70 to 1.00 AUD and $0.74 to 1.00 SGD, respectively, as of December 31, 2019. (c) Based on exchange rates of $1.28 to £1.00, $1.15 to €1.00, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.73 to 1.00 SGD and $0.73 to 1.00 CAD, respectively, as of December 31, 2018. (d) As of December 31, 2019, approximately $45.2 million of letters of credit were issued. (e) Based on exchange rates of $0.01 to 1.00 JPY for December 31, 2019 and 2018. (3) Interest rates are based on our current senior unsecured debt ratings and is currently 100 basis points over the applicable index for floating rate advances for the 2023 Term Loan and the 2024 Term Loan. (4) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by a portion of U.S. dollar and Canadian dollar borrowings under the 2023 Term Loan and 2024 Term Loan, and the secured note due March 2023. See Note 16. "Derivative Instruments" for further information. (5) Balances as of December 31, 2019 and December 31, 2018 are as follows (balances, in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of ​ Weighted- ​ Balance as of ​ Weighted- ​ ​ ​ December 31, ​ average ​ December 31, ​ average ​ Denomination of Draw 2019 interest rate 2018 interest rate U.S. dollar ($) ​ $ 300,000 2.74 % (b) $ 300,000 3.46 % (d) Singapore dollar (SGD) ​ 147,931 (a) 2.68 % ​ 146,080 (c) 2.76 % Australian dollar (AUD) ​ 203,820 (a) 1.85 % ​ 204,632 (c) 2.94 % Hong Kong dollar (HKD) ​ 85,629 (a) 3.60 % ​ 85,188 (c) 3.32 % Canadian dollar (CAD) ​ 75,825 (a) 3.00 % (b) ​ 72,220 (c) 3.24 % (d) Total ​ $ 813,205 2.62 % (b) $ 808,120 3.17 % (d) (a) Based on exchange rates of $0.74 to 1.00 SGD, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD and $0.77 to 1.00 CAD, respectively, as of December 31, 2019. (b) As of December 31, 2019, the weighted-average interest rate reflecting interest rate swaps was 2.44% (U.S. dollar), 1.78% (Canadian dollar) and 2.39% (Total). See Note 16 for further discussion on interest rate swaps. (c) Based on exchange rates of $0.73 to 1.00 SGD, $0.70 to 1.00 AUD, $0.13 to 1.00 HKD and $0.73 to 1.00 CAD, respectively, as of December 31, 2018. (d) As of December 31, 2018, the weighted-average interest rate reflecting interest rate swaps was 2.44% (U.S. dollar), 1.78% (Canadian dollar) and 2.66% (Total). See Note 16 for further discussion on interest rate swaps. ​ (6) Based on exchange rates of $1.12 to €1.00 as of December 31, 2019 and $1.15 to €1.00 as of December 31, 2018. (7) Based on exchange rates of $1.33 to £1.00 as of December 31, 2019 and $1.28 to £1.00 as of December 31, 2018. (8) The 5.875% 2020 Notes were paid in full in January 2019 (by tender offer) and February 2019 (by redemption of the remaining balance after the tender offer). The tender offer and redemption resulted in an early extinguishment charge of approximately $12.9 million during the three months ended March 31, 2019. (9) On March 5, 2019, Digital Stout Holding, LLC, a wholly owned subsidiary of the Operating Partnership, issued and sold an additional £150.0 million aggregate principal amount of 2030 Notes. The terms of the 2030 Notes are governed by an indenture, dated as of October 17, 2018, among Digital Stout Holding, LLC, Digital Realty Trust, Inc., the Operating Partnership, Deutsche Trustee Company Limited, as trustee, Deutsche Bank AG, London Branch, as paying agent and a transfer agent, and Deutsche Bank Luxembourg S.A., as registrar and a transfer agent (the “GBP Notes Indenture”), pursuant to which Digital Stout Holding, LLC previously issued £400.0 million in aggregate principal amount of its 2030 Notes. The 2030 Notes are treated as a single series with the notes previously issued under the GBP Notes Indenture. (10) The debt was deconsolidated as a result of the Ascenty joint venture formed with Brookfield. (11) Paid in full at maturity in May 2019. (12) The 3.400% 2020 Notes and 2021 Notes were paid in full in June 2019 (by tender offer) and July 2019 (by redemption of the remaining balances after the tender offer). The tender offer resulted in an early extinguishment charge of approximately $26.3 million during the year ended December 31, 2019. ​
Schedule of Debt Maturities and Principal Maturities	The table below summarizes our debt maturities and principal payments as of December 31, 2019 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Global Revolving ​ Unsecured ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit Facilities (1) Term Loans (1) Senior Notes Secured Debt Total Debt 2020 ​ $ — ​ $ — ​ $ — ​ $ 1,089 ​ $ 1,089 2021 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 2022 ​ ​ — ​ ​ — ​ ​ 800,000 ​ ​ — ​ ​ 800,000 2023 ​ 99,315 ​ 813,205 ​ 747,710 ​ 104,000 ​ 1,764,230 2024 ​ 146,451 ​ — ​ 1,004,205 ​ — ​ 1,150,656 Thereafter ​ — ​ — ​ 6,489,458 ​ — ​ 6,489,458 Subtotal ​ $ 245,766 ​ $ 813,205 ​ $ 9,041,373 ​ $ 105,089 ​ $ 10,205,433 Unamortized discount ​ — ​ — ​ (22,554) ​ — ​ (22,554) Unamortized premium ​ — ​ — ​ 6,409 ​ 54 ​ 6,463 Total ​ $ 245,766 ​ $ 813,205 ​ $ 9,025,228 ​ $ 105,143 ​ $ 10,189,342 (1) The global revolving credit facility and unsecured term loans are 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 or unsecured term loans, as applicable.

Income per Share (Tables)

Income per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Income per Share
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): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Net income available to common stockholders $ 493,011 ​ $ 249,930 ​ $ 173,148 Weighted average shares outstanding—basic 208,325,823 ​ 206,035,408 ​ 174,059,386 Potentially dilutive common shares: ​ ​ Unvested incentive units 165,185 ​ 141,260 ​ 141,136 Forward equity offering 813,073 ​ 33,315 ​ 124,527 Market performance-based awards 158,166 ​ 463,488 ​ 570,049 Weighted average shares outstanding—diluted 209,462,247 ​ 206,673,471 ​ 174,895,098 Income per share: ​ ​ Basic $ 2.37 ​ $ 1.21 ​ $ 0.99 Diluted $ 2.35 ​ $ 1.21 ​ $ 0.99
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: ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 9,087,726 8,227,463 3,996,550 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock 1,695,765 1,876,584 540,773 Potentially dilutive Series F Cumulative Redeemable Preferred Stock — — 463,301 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 2,102,655 2,326,861 2,261,153 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 789,846 3,409,772 3,313,484 Potentially dilutive Series I Cumulative Redeemable Preferred Stock 2,105,116 2,329,584 2,263,799 Potentially dilutive Series J Cumulative Redeemable Preferred Stock 1,679,534 1,858,622 720,803 Potentially dilutive Series K Cumulative Redeemable Preferred Stock 1,334,691 ​ — ​ — Potentially dilutive Series L Cumulative Redeemable Preferred Stock 670,823 ​ — ​ — Total 19,466,156 20,028,886 13,559,863

Income per Unit (Tables)

Income per Unit (Tables)	12 Months Ended
	Dec. 31, 2019
Class of Stock [Line Items]
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): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Net income available to common stockholders $ 493,011 ​ $ 249,930 ​ $ 173,148 Weighted average shares outstanding—basic 208,325,823 ​ 206,035,408 ​ 174,059,386 Potentially dilutive common shares: ​ ​ Unvested incentive units 165,185 ​ 141,260 ​ 141,136 Forward equity offering 813,073 ​ 33,315 ​ 124,527 Market performance-based awards 158,166 ​ 463,488 ​ 570,049 Weighted average shares outstanding—diluted 209,462,247 ​ 206,673,471 ​ 174,895,098 Income per share: ​ ​ Basic $ 2.37 ​ $ 1.21 ​ $ 0.99 Diluted $ 2.35 ​ $ 1.21 ​ $ 0.99
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: ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 9,087,726 8,227,463 3,996,550 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock 1,695,765 1,876,584 540,773 Potentially dilutive Series F Cumulative Redeemable Preferred Stock — — 463,301 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 2,102,655 2,326,861 2,261,153 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 789,846 3,409,772 3,313,484 Potentially dilutive Series I Cumulative Redeemable Preferred Stock 2,105,116 2,329,584 2,263,799 Potentially dilutive Series J Cumulative Redeemable Preferred Stock 1,679,534 1,858,622 720,803 Potentially dilutive Series K Cumulative Redeemable Preferred Stock 1,334,691 ​ — ​ — Potentially dilutive Series L Cumulative Redeemable Preferred Stock 670,823 ​ — ​ — Total 19,466,156 20,028,886 13,559,863
Digital Realty Trust, L.P.
Class of Stock [Line Items]
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): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Net income available to common unitholders $ 514,111 ​ $ 260,110 ​ $ 176,918 Weighted average units outstanding—basic 217,284,755 ​ 214,312,871 ​ 178,055,936 Potentially dilutive common units: ​ ​ Unvested incentive units 165,185 ​ 141,260 ​ 141,136 Forward equity offering 813,073 ​ 33,315 ​ 124,527 Market performance-based awards 158,166 ​ 463,488 ​ 570,049 Weighted average units outstanding—diluted 218,421,179 ​ 214,950,934 ​ 178,891,648 Income per unit: ​ ​ Basic $ 2.37 ​ $ 1.21 ​ $ 0.99 Diluted $ 2.35 ​ $ 1.21 ​ $ 0.99
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: ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2019 2018 2017 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units 1,695,765 1,876,584 540,773 Potentially dilutive Series F Cumulative Redeemable Preferred Units — — 463,301 Potentially dilutive Series G Cumulative Redeemable Preferred Units 2,102,655 2,326,861 2,261,153 Potentially dilutive Series H Cumulative Redeemable Preferred Units 789,846 3,409,772 3,313,484 Potentially dilutive Series I Cumulative Redeemable Preferred Units 2,105,116 2,329,584 2,263,799 Potentially dilutive Series J Cumulative Redeemable Preferred Units 1,679,534 1,858,622 720,803 Potentially dilutive Series K Cumulative Redeemable Preferred Units 1,334,691 ​ — ​ — Potentially dilutive Series L Cumulative Redeemable Preferred Units 670,823 ​ — ​ — Total 10,378,430 11,801,423 9,563,313

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Taxes
Schedule of Deferred Tax Assets and Liabilities	Deferred income tax assets and liabilities as of December 31, 2019 and 2018 were as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ 2019 2018 Gross deferred income tax assets: ​ ​ ​ ​ Net operating loss carryforwards ​ $ 63,280 ​ $ 71,656 Basis difference - real estate property ​ 9,955 ​ 8,490 Basis difference - intangibles ​ 1,071 ​ 256 Other - temporary differences ​ 19,028 ​ 24,341 Total gross deferred income tax assets ​ 93,334 ​ 104,743 Valuation allowance ​ (40,795) ​ (51,439) Total deferred income tax assets, net of valuation allowance ​ 52,539 ​ 53,304 Gross deferred income tax liabilities: ​ ​ Basis difference - real estate property ​ 162,095 ​ 164,077 Basis difference - equity investments ​ ​ 4,000 ​ ​ — Basis difference - intangibles ​ 1,547 ​ 6,855 Straight-line rent ​ 8,044 ​ 5,340 Other - temporary differences ​ 20,218 ​ 23,584 Total gross deferred income tax liabilities ​ 195,904 ​ 199,856 Net deferred income tax liabilities ​ $ 143,365 ​ $ 146,552

Equity and Accumulated Other _2

Equity and Accumulated Other Comprehensive Loss, Net (Tables)	12 Months Ended
	Dec. 31, 2019
Equity and Accumulated Other Comprehensive Loss, Net
Schedule of redeemable preferred stock	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liquidation ​ Annual ​ Shares Outstanding as of ​ Balance (in thousands, net of ​ ​ Date(s) ​ Initial Date to ​ ​ ​ Value (in ​ Dividend ​ December 31, ​ issuance costs) as of December 31, Preferred Stock (1) Issued Redeem (2) Share Cap (3) thousands) (4) Rate (5) 2019 2018 2019 2018 6.625% Series C Cumulative Redeemable Perpetual Preferred Stock ​ Sep 14, 2017 ​ May 15, 2021 0.6389035 ​ $ 201,250 ​ $ 1.65625 8,050,000 8,050,000 ​ $ 219,250 ​ $ 219,250 5.875% Series G Cumulative Redeemable Preferred Stock ​ Apr 9, 2013 ​ Apr 9, 2018 0.7532000 ​ 250,000 ​ 1.46875 10,000,000 10,000,000 ​ 241,468 ​ 241,468 7.375% Series H Cumulative Redeemable Preferred Stock ​ Mar 26, 2014 ​ Mar 26, 2019 0.9632000 ​ — ​ 1.84375 — 14,600,000 ​ — ​ 353,290 6.350% Series I Cumulative Redeemable Preferred Stock ​ Aug 24, 2015 ​ Aug 24, 2020 0.7623100 ​ 250,000 ​ 1.58750 10,000,000 10,000,000 ​ 242,012 ​ 242,012 5.250% Series J Cumulative Redeemable Preferred Stock ​ Aug 7, 2017 ​ Aug 7, 2022 0.4252100 ​ 200,000 ​ 1.31250 8,000,000 8,000,000 ​ 193,540 ​ 193,540 5.850% Series K Cumulative Redeemable Preferred Stock ​ Mar 13, 2019 ​ Mar 13, 2024 ​ 0.4361100 ​ ​ 210,000 ​ ​ 1.46250 ​ 8,400,000 ​ — ​ ​ 203,264 ​ ​ — 5.200% Series L Cumulative Redeemable Preferred Stock ​ Oct 10, 2019 ​ Oct 10, 2024 ​ 0.3851800 ​ ​ 345,000 ​ ​ 1.30000 ​ 13,800,000 ​ — ​ ​ 334,886 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ $ 1,456,250 ​ ​ ​ 58,250,000 50,650,000 ​ $ 1,434,420 ​ $ 1,249,560 (1) All series of preferred stock do not have a stated maturity date and are not subject to any sinking fund or mandatory redemption provisions. Upon liquidation, dissolution or winding up, each series of preferred stock will rank senior to Digital Realty Trust, Inc. common stock and on parity with the other series of preferred stock. Holders of each series of 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. (2) Except in limited circumstances, reflects earliest date that Digital Realty Trust, Inc. may exercise its option to redeem the preferred stock, at a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but excluding the date of redemption. (3) 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 preferred stock will have the right (unless, prior to the change of control conversion date specified in the applicable Articles Supplementary governing the preferred stock, Digital Realty Trust, Inc. has provided or provides notice of its election to redeem the preferred stock) to convert some or all of the preferred stock held by it into a number of shares of Digital Realty Trust, Inc.’s common stock per share of preferred stock to be converted equal to the lesser of (i) the quotient obtained by dividing (a) 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 preferred stock dividend payment and prior to the corresponding dividend payment date, in which case no additional amount for such accrued and unpaid dividend will be included in this sum) by (b) the common stock price specified in the applicable Articles Supplementary governing the preferred stock; and (ii) the Share Cap, subject to certain adjustments; subject, in each case, to provisions for the receipt of alternative consideration as described in the applicable Articles Supplementary governing the preferred stock. Except in connection with specified change of control transactions, the preferred stock is not convertible into or exchangeable for any other property or securities of Digital Realty Trust, Inc. (4) Liquidation preference is $25.00 per share. (5) Dividends on preferred shares are cumulative and payable quarterly in arrears.
Ownership Interest In The Operating Partnership	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ December 31, 2018 ​ ​ Number of ​ Percentage of ​ Number of ​ Percentage of ​ ​ units total units total Digital Realty Trust, Inc. ​ 208,900,758 ​ 95.9 % 206,425,656 ​ 95.1 % Noncontrolling interests consist of: ​ ​ ​ Common units held by third parties 6,820,201 3.1 % 6,297,272 2.9 % Issuance of units in connection with Ascenty Acquisition — — % 2,338,874 1.1 % Incentive units held by employees and directors (see Note 15) 2,022,954 0.9 % 1,944,738 0.9 % ​ 217,743,913 100.0 % 217,006,540 100.0 %
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 years ended December 31, 2019, 2018 and 2017: ​ ​ ​ ​ ​ ​ ​ ​ Common Units Incentive Units Total As of December 31, 2016 ​ 1,141,814 1,333,849 2,475,663 Common units issued in connection with the DFT Merger 6,111,770 — 6,111,770 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (354,490) — (354,490) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) ​ — (208,092) (208,092) Incentive units issued upon achievement of market performance condition — 390,795 390,795 Grant of incentive units to employees and directors — 73,449 73,449 As of December 31, 2017 6,899,094 1,590,001 8,489,095 Common units issued in connection with the Ascenty Acquisition 2,338,874 — 2,338,874 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (601,822) — (601,822) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) ​ — (110,070) (110,070) Incentive units issued upon achievement of market performance condition — 357,956 357,956 Grant of incentive units to employees and directors — 128,986 128,986 Cancellation / forfeitures of incentive units held by employees and directors — (22,135) (22,135) As of December 31, 2018 8,636,146 1,944,738 10,580,884 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (1,815,945) — (1,815,945) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) — (338,515) (338,515) Incentive units issued upon achievement of market performance condition — 319,279 319,279 Grant of incentive units to employees and directors — 120,368 120,368 Cancellation / forfeitures of incentive units held by employees and directors — (22,916) (22,916) As of December 31, 2019 6,820,201 2,022,954 8,843,155 (1) These redemptions and conversions were 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 consolidated balance sheet of Digital Realty Trust, Inc.
Schedule of Dividends	We have declared and paid the following dividends on our common and preferred stock for the years ended December 31, 2019, 2018 and 2017 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Series C ​ Series F ​ Series G ​ Series H ​ Series I ​ Series J ​ Series K ​ Series L ​ ​ ​ ​ ​ ​ ​ ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ ​ Common ​ Date dividend declared Dividend payment date Stock Stock Stock Stock Stock Stock Stock Stock ​ ​ Stock ​ March 1, 2017 ​ March 31, 2017 ​ $ — $ 3,023 ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ — ​ $ — ​ $ — ​ ​ $ 148,358 (1) May 8, 2017 ​ June 30, 2017 ​ — — (2) 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ ​ 150,814 (1) August 7, 2017 ​ September 29, 2017 ​ — — 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ ​ 191,041 (1) November 2, 2017 ​ December 29, 2017 for Preferred Stock; January 12, 2018 for Common Stock ​ 3,963 (3) — ​ 3,672 6,730 ​ 3,969 ​ 4,200 (3) — ​ — ​ ​ 191,067 (1) ​ ​ ​ $ 3,963 $ 3,023 $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 4,200 ​ $ — ​ $ — ​ ​ $ 681,280 March 1, 2018 ​ March 30, 2018 ​ $ 3,333 $ — $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ ​ $ 208,015 (4) May 8, 2018 ​ June 29, 2018 ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,071 (4) August 14, 2018 ​ September 28, 2018 ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,166 (4) November 12, 2018 ​ December 31, 2018 for Preferred Stock; January 15, 2019 for Common Stock ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,415 (4) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 10,500 ​ $ — ​ $ — ​ ​ $ 832,667 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ February 21, 2019 ​ March 29, 2019 ​ $ 3,333 ​ ​ — ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ ​ $ 224,802 (5) May 13, 2019 ​ June 28, 2019 ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — (6) ​ 3,969 ​ ​ 2,625 ​ ​ 3,686 (7) ​ — ​ ​ ​ 224,895 (5) August 13, 2019 ​ September 30, 2019 ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — ​ ​ 3,969 ​ ​ 2,625 ​ ​ 3,071 ​ ​ — ​ ​ ​ 225,188 (5) November 19, 2019 ​ December 31, 2019 for Preferred Stock; January 15, 2020 for Common Stock ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — ​ ​ 3,969 ​ ​ 2,625 ​ ​ 3,071 ​ ​ 4,036 (8) ​ ​ 225,488 (5) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 6,730 ​ $ 15,876 ​ $ 10,500 ​ $ 9,828 ​ $ 4,036 ​ ​ $ 900,373 ​ Annual rate of dividend per share ​ ​ $ 1.65625 $ 1.65625 $ 1.46875 ​ $ 1.84375 ​ $ 1.58750 ​ $ 1.31250 ​ $ 1.46250 ​ $ 1.30000 ​ ​ (1) $3.720 annual rate of dividend per share. (2) Redeemed on April 5, 2017 for $25.01840 per share, or a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but not including the redemption date of approximately $0.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $6.3 million were recorded as a reduction to net income available to common stockholders. (3) Represents a pro rata dividend from and including the original issue date to and including December 31, 2017. (4) $4.040 annual rate of dividend per share. (5) $4.320 annual rate of dividend per share. (6) Redeemed on April 1, 2019 for $25.00 per share, or a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but not including the redemption date. In connection with the redemption, the previously incurred offering costs of approximately $11.8 million were recorded as a reduction to net income available to common stockholders. (7) Represents a pro rata dividend from and including the original issue date to and including June 30, 2019. (8) Represents a pro rata dividend from and including the original issue date to and including December 31, 2019.
Schedule of Accumulated Other Comprehensive Income, Net	The accumulated balances for each item within other comprehensive income (loss), net are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign currency ​ Cash flow ​ Foreign currency net ​ Accumulated other ​ ​ translation ​ hedge ​ investment hedge ​ comprehensive ​ adjustments adjustments adjustments income (loss), net Balance as of December 31, 2017 ​ $ (147,370) ​ $ 13,200 ​ $ 25,738 ​ $ (108,432) Net current period change ​ (11,279) ​ 7,890 ​ — ​ (3,389) Reclassification to interest expense from interest rate swaps ​ — ​ (3,826) ​ — ​ (3,826) Balance as of December 31, 2018 ​ $ (158,649) ​ $ 17,264 ​ $ 25,738 ​ $ (115,647) Net current period change ​ 22,015 ​ (8,839) ​ — ​ 13,176 Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty ​ ​ 21,687 ​ ​ — ​ ​ — ​ ​ 21,687 Reclassification to interest expense from interest rate swaps ​ — ​ (7,138) ​ — ​ (7,138) Balance as of December 31, 2019 ​ $ (114,947) ​ $ 1,287 ​ $ 25,738 ​ $ (87,922)

Capital and Accumulated Other_2

Capital and Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2019
Class of Stock [Line Items]
Schedule of redeemable preferred units	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liquidation Annual ​ Units Outstanding as ​ Balance (in thousands, net of ​ ​ Date(s) ​ Initial Date to Value (in Distribution ​ of December 31, ​ issuance costs) as of December 31, Preferred Units (1) Issued Redeem (2) thousands) (3) Rate (4) 2019 ​ 2018 2019 ​ 2018 6.625% Series C Cumulative Redeemable Perpetual Preferred Units ​ Sep 14, 2017 ​ May 15, 2021 ​ $ 201,250 ​ $ 1.65625 8,050,000 8,050,000 ​ $ 219,250 ​ $ 219,250 5.875% Series G Cumulative Redeemable Preferred Units ​ Apr 9, 2013 ​ Apr 9, 2018 ​ 250,000 ​ 1.46875 10,000,000 10,000,000 ​ 241,468 ​ 241,468 7.375% Series H Cumulative Redeemable Preferred Units ​ Mar 26, 2014 ​ Mar 26, 2019 ​ — ​ 1.84375 — 14,600,000 ​ — ​ 353,290 6.350% Series I Cumulative Redeemable Preferred Units ​ Aug 24, 2015 ​ Aug 24, 2020 ​ 250,000 ​ 1.58750 10,000,000 10,000,000 ​ 242,012 ​ 242,012 5.250% Series J Cumulative Redeemable Preferred Units ​ Aug 7, 2017 ​ Aug 7, 2022 ​ 200,000 ​ 1.31250 8,000,000 8,000,000 ​ 193,540 ​ 193,540 5.850% Series K Cumulative Redeemable Preferred Units ​ Mar 13, 2019 ​ Mar 13, 2024 ​ ​ 210,000 ​ ​ 1.46250 ​ 8,400,000 ​ — ​ ​ 203,264 ​ ​ — 5.200% Series L Cumulative Redeemable Preferred Units ​ Oct 10, 2019 ​ Oct 10, 2024 ​ ​ 345,000 ​ ​ 1.30000 ​ 13,800,000 ​ — ​ ​ 334,886 ​ ​ — ​ ​ ​ ​ ​ ​ $ 1,456,250 ​ ​ ​ 58,250,000 50,650,000 ​ $ 1,434,420 ​ $ 1,249,560 (1) All series of preferred units do not have a stated maturity date and are not subject to any sinking fund or mandatory redemption provisions. Upon liquidation, dissolution or winding up, each series of preferred units will rank senior to Digital Realty Trust, Inc. common units and on parity with the other series of preferred units. (2) Except in limited circumstances, reflects earliest date that Digital Realty Trust, Inc. may exercise its option to redeem the corresponding series of preferred stock, at a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but excluding the date of redemption. The Operating Partnership is required to redeem the corresponding series of preferred units in the event that the General Partner redeems a series of preferred stock. (3) Liquidation preference is $25.00 per unit. (4) Distributions on preferred units are cumulative and payable quarterly in arrears.
Schedule of Distributions	We have declared and paid the following dividends on our common and preferred stock for the years ended December 31, 2019, 2018 and 2017 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Series C ​ Series F ​ Series G ​ Series H ​ Series I ​ Series J ​ Series K ​ Series L ​ ​ ​ ​ ​ ​ ​ ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ ​ Common ​ Date dividend declared Dividend payment date Stock Stock Stock Stock Stock Stock Stock Stock ​ ​ Stock ​ March 1, 2017 ​ March 31, 2017 ​ $ — $ 3,023 ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ — ​ $ — ​ $ — ​ ​ $ 148,358 (1) May 8, 2017 ​ June 30, 2017 ​ — — (2) 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ ​ 150,814 (1) August 7, 2017 ​ September 29, 2017 ​ — — 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ ​ 191,041 (1) November 2, 2017 ​ December 29, 2017 for Preferred Stock; January 12, 2018 for Common Stock ​ 3,963 (3) — ​ 3,672 6,730 ​ 3,969 ​ 4,200 (3) — ​ — ​ ​ 191,067 (1) ​ ​ ​ $ 3,963 $ 3,023 $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 4,200 ​ $ — ​ $ — ​ ​ $ 681,280 March 1, 2018 ​ March 30, 2018 ​ $ 3,333 $ — $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ ​ $ 208,015 (4) May 8, 2018 ​ June 29, 2018 ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,071 (4) August 14, 2018 ​ September 28, 2018 ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,166 (4) November 12, 2018 ​ December 31, 2018 for Preferred Stock; January 15, 2019 for Common Stock ​ 3,333 — 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ ​ 208,415 (4) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 10,500 ​ $ — ​ $ — ​ ​ $ 832,667 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ February 21, 2019 ​ March 29, 2019 ​ $ 3,333 ​ ​ — ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ ​ $ 224,802 (5) May 13, 2019 ​ June 28, 2019 ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — (6) ​ 3,969 ​ ​ 2,625 ​ ​ 3,686 (7) ​ — ​ ​ ​ 224,895 (5) August 13, 2019 ​ September 30, 2019 ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — ​ ​ 3,969 ​ ​ 2,625 ​ ​ 3,071 ​ ​ — ​ ​ ​ 225,188 (5) November 19, 2019 ​ December 31, 2019 for Preferred Stock; January 15, 2020 for Common Stock ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — ​ ​ 3,969 ​ ​ 2,625 ​ ​ 3,071 ​ ​ 4,036 (8) ​ ​ 225,488 (5) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 6,730 ​ $ 15,876 ​ $ 10,500 ​ $ 9,828 ​ $ 4,036 ​ ​ $ 900,373 ​ Annual rate of dividend per share ​ ​ $ 1.65625 $ 1.65625 $ 1.46875 ​ $ 1.84375 ​ $ 1.58750 ​ $ 1.31250 ​ $ 1.46250 ​ $ 1.30000 ​ ​ (1) $3.720 annual rate of dividend per share. (2) Redeemed on April 5, 2017 for $25.01840 per share, or a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but not including the redemption date of approximately $0.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $6.3 million were recorded as a reduction to net income available to common stockholders. (3) Represents a pro rata dividend from and including the original issue date to and including December 31, 2017. (4) $4.040 annual rate of dividend per share. (5) $4.320 annual rate of dividend per share. (6) Redeemed on April 1, 2019 for $25.00 per share, or a redemption price of $25.00 per share, plus accrued and unpaid dividends up to but not including the redemption date. In connection with the redemption, the previously incurred offering costs of approximately $11.8 million were recorded as a reduction to net income available to common stockholders. (7) Represents a pro rata dividend from and including the original issue date to and including June 30, 2019. (8) Represents a pro rata dividend from and including the original issue date to and including December 31, 2019.
Schedule of Accumulated Other Comprehensive Income, Net	The accumulated balances for each item within other comprehensive income (loss), net are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign currency ​ Cash flow ​ Foreign currency net ​ Accumulated other ​ ​ translation ​ hedge ​ investment hedge ​ comprehensive ​ adjustments adjustments adjustments income (loss), net Balance as of December 31, 2017 ​ $ (147,370) ​ $ 13,200 ​ $ 25,738 ​ $ (108,432) Net current period change ​ (11,279) ​ 7,890 ​ — ​ (3,389) Reclassification to interest expense from interest rate swaps ​ — ​ (3,826) ​ — ​ (3,826) Balance as of December 31, 2018 ​ $ (158,649) ​ $ 17,264 ​ $ 25,738 ​ $ (115,647) Net current period change ​ 22,015 ​ (8,839) ​ — ​ 13,176 Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty ​ ​ 21,687 ​ ​ — ​ ​ — ​ ​ 21,687 Reclassification to interest expense from interest rate swaps ​ — ​ (7,138) ​ — ​ (7,138) Balance as of December 31, 2019 ​ $ (114,947) ​ $ 1,287 ​ $ 25,738 ​ $ (87,922)
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Schedule of Distributions	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Series C ​ Series F ​ Series G ​ Series H ​ Series I ​ Series J ​ Series K ​ Series L ​ ​ ​ ​ ​ ​ ​ ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Preferred ​ Common ​ Date distribution declared Distribution payment date Units Units Units Units Units Units Units ​ Units ​ Units ​ Mar 1, 2017 ​ March 31, 2017 ​ $ — ​ $ 3,023 ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ — ​ $ — ​ $ — ​ $ 150,968 (1) May 8, 2017 ​ June 30, 2017 ​ — ​ — (2) 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ 153,176 (1) Aug 7, 2017 ​ September 29, 2017 ​ — ​ — ​ 3,672 ​ 6,730 ​ 3,969 ​ — ​ — ​ — ​ 199,049 (1) Nov 2, 2017 ​ December 29, 2017 for Preferred Units; January 12, 2018 for Common Units ​ 3,963 (3) — ​ 3,672 ​ 6,730 ​ 3,969 ​ 4,200 (5) — ​ — ​ 199,061 (1) ​ ​ ​ ​ $ 3,963 ​ $ 3,023 ​ $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 4,200 ​ $ — ​ $ — ​ $ 702,254 ​ Mar 1, 2017 ​ March 30, 2018 ​ $ 3,333 ​ $ — ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ $ 216,953 (4) May 8, 2018 ​ June 29, 2018 ​ 3,333 ​ — ​ 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ 216,789 (4) Aug 14, 2018 ​ September 28, 2018 ​ 3,333 ​ — ​ 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ 216,825 (4) Nov 12, 2018 ​ December 31, 2018 for Preferred Units; January 15, 2019 for Common Units ​ 3,333 ​ — ​ 3,672 ​ 6,730 ​ 3,969 ​ 2,625 ​ — ​ — ​ 216,838 (4) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 26,920 ​ $ 15,876 ​ $ 10,500 ​ $ — ​ $ — ​ $ 867,405 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ February 21, 2019 ​ March 29, 2019 ​ $ 3,333 ​ $ — ​ $ 3,672 ​ $ 6,730 ​ $ 3,969 ​ $ 2,625 ​ $ — ​ $ — ​ $ 235,256 (5) May 13, 2019 ​ June 28, 2019 ​ 3,333 ​ — ​ 3,672 ​ — (6) 3,969 ​ 2,625 ​ 3,686 (7) — ​ 235,142 (5) August 13, 2019 ​ September 30, 2019 ​ 3,333 ​ — ​ 3,672 ​ — ​ 3,969 ​ 2,625 ​ 3,071 ​ — ​ 235,164 (5) November 19, 2019 ​ December 31, 2019 for Preferred Units; January 15, 2020 for Common Units ​ ​ 3,333 ​ ​ — ​ ​ 3,672 ​ ​ — ​ ​ 3,969 ​ ​ 2,625 ​ ​ 3,071 ​ ​ 4,036 (8) ​ 235,154 (5) ​ ​ ​ ​ $ 13,332 ​ $ — ​ $ 14,688 ​ $ 6,730 ​ $ 15,876 ​ $ 10,500 ​ $ 9,828 ​ $ 4,036 ​ $ 940,716 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Annual rate of distribution per unit ​ ​ ​ $ 1.65625 ​ $ 1.65625 ​ $ 1.46875 ​ $ 1.84375 ​ $ 1.58750 ​ $ 1.31250 ​ $ 1.46250 ​ $ 1.30000 ​ ​ ​ ​ (1) $3.720 annual rate of distribution per unit. (2) Redeemed on April 5, 2017 for $25.01840 per unit, or a redemption price of $25.00 per unit, plus accrued and unpaid distributions up to but not including the redemption date of approximately $0.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $6.3 million were recorded as a reduction to net income available to common unitholders. (3) Represents a pro rata distribution from and including the original issue date to and including December 31, 2017. (4) $4.040 annual rate of distribution per unit. (5) $4.320 annual rate of distribution per unit. (6) Redeemed on April 1, 2019 for $25.00 per unit, or a redemption price of $25.00 per unit, plus accrued and unpaid distributions up to but not including the redemption date. In connection with the redemption, the previously incurred offering costs of approximately $11.8 million were recorded as a reduction to net income available to common unitholders. (7) Represents a pro rata distribution from and including the original issue date to and including June 30, 2019. (8) Represents a pro rata distribution from and including the original issue date to and including December 31, 2019.
Schedule of Accumulated Other Comprehensive Income, Net	The accumulated balances for each item within other comprehensive income (loss) are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign currency ​ ​ ​ Foreign currency net ​ Accumulated other ​ ​ translation ​ Cash flow hedge ​ investment hedge ​ comprehensive ​ adjustments adjustments adjustments loss Balance as of December 31, 2017 ​ $ (151,795) ​ $ 12,758 ​ $ 26,152 ​ $ (112,885) Net current period change ​ (11,736) ​ 8,197 ​ — ​ (3,539) Reclassification to interest expense from interest rate swaps ​ — ​ (3,969) ​ — ​ (3,969) Balance as of December 31, 2018 ​ $ (163,531) ​ $ 16,986 ​ $ 26,152 ​ $ (120,393) Net current period change ​ 23,975 ​ (9,232) ​ — ​ 14,743 Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty ​ ​ 21,687 ​ ​ — ​ ​ — ​ ​ 21,687 Reclassification to interest expense from interest rate swaps ​ — ​ (7,446) ​ — ​ (7,446) Balance as of December 31, 2019 ​ $ (117,869) ​ $ 308 ​ $ 26,152 ​ $ (91,409)

Incentive Plan (Tables)

Incentive Plan (Tables)	12 Months Ended
	Dec. 31, 2019
Incentive Plan
Schedule of Deferred Compensation	Below is a summary of our compensation expense for the years ended December 31, 2019, 2018 and 2017 and our unearned compensation as of December 31, 2019 and December 31, 2018 (in millions): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Expected ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ period to ​ ​ Deferred Compensation Unearned Compensation recognize ​ ​ Expensed ​ Capitalized ​ As of ​ As of unearned ​ Year Ended December 31, ​ Year Ended December 31, ​ December 31, ​ December 31, compensation Type of incentive award 2019 2018 2017 2019 2018 2017 2019 2018 (in years) Long-term incentive units ​ $ 8.7 ​ $ 6.8 ​ $ 3.9 ​ $ 0.2 ​ $ 0.2 ​ $ 1.7 ​ $ 15.4 ​ $ 11.5 2.2 Market performance-based awards ​ 13.0 ​ 12.7 ​ 9.6 ​ 0.8 ​ 0.8 ​ 2.3 ​ 28.4 ​ 24.8 2.5 Restricted stock ​ 11.5 ​ 6.1 ​ 4.5 ​ 2.8 ​ 4.2 ​ 3.3 ​ 29.1 ​ 23.6 2.6
Schedule of weighted average fair value	The following table sets forth the weighted average fair value of for each type of incentive award at the date of grant for the years ended December 31, 2019, 2018 and 2017: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average Fair Value at Date of Grant Type of incentive award 2019 2018 2017 Long-term incentive units ​ $ 116.22 ​ $ 101.86 ​ $ 109.71 Market performance-based awards ​ $ 114.97 ​ $ 119.29 ​ $ 111.06 Restricted stock ​ $ 115.25 ​ $ 100.33 ​ $ 108.65
Summary of Long-Term Incentive Unit Activity	Below is a summary of our long-term incentive unit activity for the year ended December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ Grant Date Fair Unvested Long-term Incentive Units ​ Units Value Unvested, beginning of period 162,186 ​ $ 100.59 Granted 120,368 ​ 116.22 Vested (55,039) ​ 100.33 Cancelled or expired (19,228) ​ 97.32 Unvested, end of period 208,287 ​ $ 110.00
Market Performance Based Awards	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Market ​ ​ ​ Performance ​ ​ ​ RMS Relative Vesting ​ Level Market Performance Percentage ​ Below Threshold Level ≤ -300 basis points 0 % Threshold Level -300 basis points 25 % Target Level 100 basis points 50 % High Level ≥ 500 basis points 100 %
Schedule Of Valuation Assumptions	​ ​ ​ ​ ​ ​ ​ ​ Expected Stock Price Risk-Free Interest ​ Award Date Volatility rate ​ January 1, 2017 25 % 1.49 % February 28, 2017 23 % 1.43 % January 1, 2018 22 % 1.98 % March 1, 2018 22 % 2.34 % March 9, 2018 22 % 2.42 % January 1, 2019 ​ 23 % 2.44 % February 21, 2019 ​ 23 % 2.48 %
Summary of Restricted Stock Activity	Below is a summary of our restricted stock activity for the year ended December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ Grant Date Fair Unvested Restricted Stock Shares Value Unvested, beginning of period 299,215 ​ $ 97.55 Granted (1) 226,902 ​ 115.25 Vested (111,950) ​ 93.38 Cancelled or expired (41,375) ​ 107.52 Unvested, end of period 372,792 ​ $ 108.47 (1) All restricted stock awards granted in 2019 are subject only to service conditions.

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments
Schedule of Outstanding Derivative Instruments	As of December 31, 2019 and December 31, 2018, we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value at Significant Other Notional Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ Observable Inputs (Level 2) As of ​ As of ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of December 31, ​ December 31, ​ Type of ​ Strike ​ Effective ​ Expiration ​ December 31, ​ December 31, 2019 2018 Derivative Rate Date Date 2019 (3) 2018 (3) Currently-paying contracts ​ ​ ​ $ — ​ $ 206,000 (1) Swap 1.611 ​ Jun 15, 2017 ​ Jan 15, 2020 ​ $ — ​ $ 1,976 ​ — ​ 54,905 (1) Swap 1.605 ​ Jun 6, 2017 ​ Jan 6, 2020 ​ — ​ 517 ​ 29,000 (1) 75,000 (1) Swap 1.016 ​ Apr 6, 2016 ​ Jan 6, 2021 ​ 175 ​ 2,169 ​ 75,000 (1) 75,000 (1) Swap 1.164 ​ Jan 15, 2016 ​ Jan 15, 2021 ​ 345 ​ 1,970 ​ 300,000 (1) 300,000 (1) Swap 1.435 ​ Jan 15, 2016 ​ Jan 15, 2023 ​ 945 ​ 11,463 ​ 75,825 (2) 72,220 (2) Swap 0.779 ​ Jan 15, 2016 ​ Jan 15, 2021 ​ 931 ​ 2,024 $ 479,825 ​ $ 783,125 ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 2,396 ​ $ 20,119 (1) Represents debt which bears interest based on one-month U.S. LIBOR. (2) Represents debt which bears interest based on one-month CDOR. Translation to U.S. dollars is based on exchange rates of $0.77 to 1.00 CAD as of December 31, 2019 and $0.73 to 1.00 CAD as of December 31, 2018. (3) Balance recorded in other assets in the consolidated balance sheets if positive and recorded in accounts payable and other accrued liabilities in the consolidated balance sheets if negative.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value of Financial Instruments
Estimated Fair Value And Carrying Amounts	As of December 31, 2019 and December 31, 2018, the aggregate estimated fair value and carrying value of our global revolving credit facilities, unsecured term loans, unsecured senior notes and mortgage loans were as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Categorization ​ As of December 31, 2019 ​ As of December 31, 2018 ​ ​ under the fair value ​ Estimated Fair ​ ​ ​ ​ Estimated Fair ​ ​ ​ ​ hierarchy Value Carrying Value Value Carrying Value Global revolving credit facilities (1)(4) Level 2 ​ $ 245,766 ​ $ 245,766 ​ $ 1,663,156 ​ $ 1,663,156 Unsecured term loans (2)(4) Level 2 ​ 813,205 ​ 813,205 ​ 1,183,121 ​ 1,183,121 Unsecured senior notes (3)(4) Level 2 ​ 9,697,166 ​ 9,025,229 ​ 7,684,368 ​ 7,629,679 Secured debt (3)(4) Level 2 ​ 105,245 ​ 105,143 ​ 706,086 ​ 705,924 ​ ​ ​ ​ $ 10,861,382 ​ $ 10,189,343 ​ $ 11,236,731 ​ $ 11,181,880 (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 loans 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 secured debt are determined based on the expected future payments discounted at risk-adjusted rates and quoted market prices. (4) The carrying value excludes unamortized premiums (discounts) and deferred financing costs (see note 9).

Quarterly Financial Informati_3

Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information (unaudited)
Summary of Selected Quarterly Financial Data	The tables below reflect selected quarterly information for the years ended December 31, 2019 and 2018. Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per share amounts). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2019 ​ 2019 ​ June 30, 2019 ​ March 31, 2019 Total operating revenues ​ $ 787,463 ​ $ 806,466 ​ $ 800,797 ​ $ 814,515 Net income ​ 349,326 ​ 67,574 ​ 61,324 ​ 120,997 Net income attributable to Digital Realty Trust, Inc. ​ 336,284 ​ 66,497 ​ 60,168 ​ 116,812 Preferred stock dividends and issuance costs associated with redeemed preferred stock ​ (20,707) ​ (16,670) ​ (28,430) ​ (20,943) Net income available to common stockholders ​ 315,577 ​ 49,827 ​ 31,738 ​ 95,869 Basic net income per share available to common stockholders ​ $ 1.51 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 Diluted net income per share available to common stockholders ​ $ 1.50 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2018 ​ 2018 ​ June 30, 2018 ​ March 31, 2018 Total operating revenues ​ $ 778,267 ​ $ 768,924 ​ $ 754,919 ​ $ 744,368 Net income ​ 52,597 ​ 90,264 ​ 88,159 ​ 110,095 Net income attributable to Digital Realty Trust, Inc. ​ 51,559 ​ 87,597 ​ 85,463 ​ 106,627 Preferred stock dividends and issuance costs associated with redeemed preferred stock ​ (20,329) ​ (20,329) ​ (20,329) ​ (20,329) Net income available to common stockholders ​ 31,230 ​ 67,268 ​ 65,134 ​ 86,298 Basic net income per share available to common stockholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 Diluted net income per share available to common stockholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42

Quarterly Financial Informati_4

Quarterly Financial Information (Digital Realty Trust, L.P.) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information [Line Items]
Summary of Selected Quarterly Financial Data	The tables below reflect selected quarterly information for the years ended December 31, 2019 and 2018. Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per share amounts). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2019 ​ 2019 ​ June 30, 2019 ​ March 31, 2019 Total operating revenues ​ $ 787,463 ​ $ 806,466 ​ $ 800,797 ​ $ 814,515 Net income ​ 349,326 ​ 67,574 ​ 61,324 ​ 120,997 Net income attributable to Digital Realty Trust, Inc. ​ 336,284 ​ 66,497 ​ 60,168 ​ 116,812 Preferred stock dividends and issuance costs associated with redeemed preferred stock ​ (20,707) ​ (16,670) ​ (28,430) ​ (20,943) Net income available to common stockholders ​ 315,577 ​ 49,827 ​ 31,738 ​ 95,869 Basic net income per share available to common stockholders ​ $ 1.51 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 Diluted net income per share available to common stockholders ​ $ 1.50 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2018 ​ 2018 ​ June 30, 2018 ​ March 31, 2018 Total operating revenues ​ $ 778,267 ​ $ 768,924 ​ $ 754,919 ​ $ 744,368 Net income ​ 52,597 ​ 90,264 ​ 88,159 ​ 110,095 Net income attributable to Digital Realty Trust, Inc. ​ 51,559 ​ 87,597 ​ 85,463 ​ 106,627 Preferred stock dividends and issuance costs associated with redeemed preferred stock ​ (20,329) ​ (20,329) ​ (20,329) ​ (20,329) Net income available to common stockholders ​ 31,230 ​ 67,268 ​ 65,134 ​ 86,298 Basic net income per share available to common stockholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 Diluted net income per share available to common stockholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42
Digital Realty Trust, L.P.
Quarterly Financial Information [Line Items]
Summary of Selected Quarterly Financial Data	The tables below reflect selected quarterly information for the years ended December 31, 2019 and 2018. Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per unit amounts). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2019 ​ 2019 ​ June 30, 2019 ​ March 31, 2019 Total operating revenues ​ $ 787,463 ​ $ 806,466 ​ $ 800,797 ​ $ 814,515 Net income ​ 349,326 ​ 67,574 ​ 61,324 ​ 120,997 Net income attributable to Digital Realty Trust, L.P. ​ 349,384 ​ 68,797 ​ 61,568 ​ 121,112 Preferred unit distributions and issuance costs associated with redeemed preferred units ​ (20,707) ​ (16,670) ​ (28,430) ​ (20,943) Net income available to common unitholders ​ 328,677 ​ 52,127 ​ 33,138 ​ 100,169 Basic net income per unit available to common unitholders ​ $ 1.51 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 Diluted net income per unit available to common unitholders ​ $ 1.50 ​ $ 0.24 ​ $ 0.15 ​ $ 0.46 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ December 31, September 30, ​ ​ ​ ​ ​ ​ 2018 ​ 2018 ​ June 30, 2018 ​ March 31, 2018 Total operating revenues ​ $ 778,267 ​ $ 768,924 ​ $ 754,919 ​ $ 744,368 Net income ​ 52,597 ​ 90,264 ​ 88,159 ​ 110,095 Net income attributable to Digital Realty Trust, L.P. ​ 52,859 ​ 90,297 ​ 88,163 ​ 110,107 Preferred unit distributions and issuance costs associated with redeemed preferred units ​ (20,329) ​ (20,329) ​ (20,329) ​ (20,329) Net income available to common unitholders ​ 32,530 ​ 69,968 ​ 67,834 ​ 89,778 Basic net income per unit available to common unitholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42 Diluted net income per unit available to common unitholders ​ $ 0.15 ​ $ 0.33 ​ $ 0.32 ​ $ 0.42

Organization and Description _3

Organization and Description of Business - Data Centers (Details)	Dec. 31, 2019property	Dec. 31, 2019USD ($)	Dec. 31, 2018property
Organization and Description of Business [Line Items]
Number of properties	225	41,000	214
Operating
Organization and Description of Business [Line Items]
Number of properties	172		196
Held-for-Sale Properties
Organization and Description of Business [Line Items]
Number of properties	12
Unconsolidated Joint Ventures
Organization and Description of Business [Line Items]
Number of properties	41		18
United States
Organization and Description of Business [Line Items]
Number of properties	147		145
United States | Operating
Organization and Description of Business [Line Items]
Number of properties	119		131
United States | Held-for-Sale Properties
Organization and Description of Business [Line Items]
Number of properties	11
United States | Unconsolidated Joint Ventures
Organization and Description of Business [Line Items]
Number of properties	17		14
Europe
Organization and Description of Business [Line Items]
Number of properties	41		38
Europe | Operating
Organization and Description of Business [Line Items]
Number of properties	41		38
Latin America
Organization and Description of Business [Line Items]
Number of properties	19		16
Latin America | Operating
Organization and Description of Business [Line Items]
Number of properties			16
Latin America | Unconsolidated Joint Ventures
Organization and Description of Business [Line Items]
Number of properties	19
Asia
Organization and Description of Business [Line Items]
Number of properties	10		7
Asia | Operating
Organization and Description of Business [Line Items]
Number of properties	5		3
Asia | Unconsolidated Joint Ventures
Organization and Description of Business [Line Items]
Number of properties	5		4
Australia
Organization and Description of Business [Line Items]
Number of properties	5		5
Australia | Operating
Organization and Description of Business [Line Items]
Number of properties	5		5
Canada
Organization and Description of Business [Line Items]
Number of properties	3		3
Canada | Operating
Organization and Description of Business [Line Items]
Number of properties	2		3
Canada | Held-for-Sale Properties
Organization and Description of Business [Line Items]
Number of properties	1
Powered Base Building | Held-for-Sale Properties
Organization and Description of Business [Line Items]
Number of properties | $		10
Powered Base Building | Held-For-Sale Properties To Third Party
Organization and Description of Business [Line Items]
Number of properties	12

Organization and Description _4

Organization and Description of Business (Details) $ in Thousands	Dec. 20, 2018USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)property	Dec. 31, 2017USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2019property	Mar. 31, 2019USD ($)	Mar. 29, 2019USD ($)
Organization and Description of Business [Line Items]
Number of properties			214		41	225
Payment for acquisition		$ 0	$ 1,679,830	$ 0
Common Interest
Organization and Description of Business [Line Items]
Ownership percentage in joint ventures		95.90%	95.10%
Preferred Interest
Organization and Description of Business [Line Items]
Ownership percentage in joint ventures		100.00%	100.00%
Ascenty
Organization and Description of Business [Line Items]
Number of properties | property						19
Ownership percentage in joint ventures		51.00%
Brookfield Infrastructure
Organization and Description of Business [Line Items]
Investment								$ 702,000
Ownership percentage in joint ventures								49.00%
Brookfield Infrastructure | Ascenty
Organization and Description of Business [Line Items]
Investment							$ 702,000
Ownership percentage in joint ventures							49.00%
Ascenty
Organization and Description of Business [Line Items]
Payment for acquisition	$ 2,000,000
DFT Merger
Organization and Description of Business [Line Items]
Number of properties | property						8
Corporate Joint Venture | Brookfield Infrastructure
Organization and Description of Business [Line Items]
Investment								$ 702,000
Ownership percentage in joint ventures								49.00%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - PPE (Details)	12 Months Ended
	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Period in which short-term investment become cash equivalents	90 days
Building and Building Improvements | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Building and Building Improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	39 years
Machinery and Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	7 years
Machinery and Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	15 years
Furniture and Fixtures | Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Furniture and Fixtures | Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	5 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill - Beginning Balance	$ 4,348,007	$ 3,389,595
Merger/Acquisition		982,667
Deconsolidation	(967,189)	0
Goodwill Adjustments	(9,436)
Impact of Change in Foreign Exchange Rates	(8,312)	(24,255)
Goodwill - Ending Balance	3,363,070	4,348,007
Telx Acquisition
Goodwill [Roll Forward]
Goodwill - Beginning Balance	330,845	330,845
Deconsolidation	0	0
Impact of Change in Foreign Exchange Rates	0	0
Goodwill - Ending Balance	330,845	330,845
European Portfolio Acquisition
Goodwill [Roll Forward]
Goodwill - Beginning Balance	442,349	466,604
Deconsolidation	0	0
Goodwill Adjustments	(9,436)
Impact of Change in Foreign Exchange Rates	7,166	(24,255)
Goodwill - Ending Balance	440,079	442,349
DFT Merger
Goodwill [Roll Forward]
Goodwill - Beginning Balance	2,592,146	2,592,146
Deconsolidation	0	0
Impact of Change in Foreign Exchange Rates	0	0
Goodwill - Ending Balance	2,592,146	2,592,146
Ascenty
Goodwill [Roll Forward]
Goodwill - Beginning Balance	982,667	0
Merger/Acquisition		982,667
Deconsolidation	(967,189)	0
Impact of Change in Foreign Exchange Rates	$ (15,478)	0
Goodwill - Ending Balance		$ 982,667

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of Significant Accounting Policies
Interest capitalized	$ 40.2	$ 34.7	$ 21.7
Compensation costs, leasing and construction activities	50.3	42	38
Capitalized employee expenses related to construction activities	30.8	27.2	10.6
Capitalized employee expenses related to leasing activities	0	37	43.4
Deferred leasing costs	291.8	322.2
Amortization expense on deferred leasing costs	$ 75.3
Amortization expense on deferred leasing costs		$ 72.9	$ 50.1

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of Significant Accounting Policies
Unrecognized tax benefits	$ 0	$ 0
Income tax penalties and interest expense	$ 0	$ 0	$ 0

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Lease Accounting (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Remaining future rental payments aggregate		$ 882,698
Operating Lease, Liability		693,539
Operating Lease, Right-of-Use Asset	$ 683,900	628,681
Notes And Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Rent receivable, net of allowance		$ 171,900	$ 185,700
ASU 2016-02
Summary Of Significant Accounting Policies [Line Items]
Lease, Practical Expedients, Package [true false]	true
Lease, Practical Expedient, Land Easement [true false]	true
Lease, Practical Expedient, Lessor Single Lease Component [true false]	true
Accumulated dividends in excess of earnings	$ 6,300
Operating Lease, Liability	757,200
Amount reclassified from deferred rent liabilities to operatin glease liabilities under ASC 842	$ 73,300

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Revenue Recognition and Gains (Details) - USD ($) $ in Thousands	Mar. 29, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts		$ 13,753	$ 11,554
Deconsolidation gain recognized, net of taxes and foreign currency loss	$ 67,500	67,497		$ 0
Accounts payable and other accrued liabilities
Summary Of Significant Accounting Policies [Line Items]
Asset Retirement Obligation		$ 16,800	$ 17,500
ASU 2016-02
Summary Of Significant Accounting Policies [Line Items]
Revenue recognized as a percent of total revenue		97.00%	97.00%
ASU 2014-09
Summary Of Significant Accounting Policies [Line Items]
Revenue recognized as a percent of total revenue		3.00%	3.00%

Summary of Significant Accou_10

Summary of Significant Accounting Policies - Segment and Geographic Information (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2019USD ($)segment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | segment									1
Number of reportable segments | segment									1
Total operating revenues	$ 787,463	$ 806,466	$ 800,797	$ 814,515	$ 778,267	$ 768,924	$ 754,919	$ 744,368	$ 3,209,241	$ 3,046,478	$ 2,457,928
Net investments in real estate	15,517,684				15,079,726				$ 15,517,684	$ 15,079,726
Geographic Concentration Risk | Sales
Summary Of Significant Accounting Policies [Line Items]
Concentration risk									9.00%	9.70%	11.20%
Geographic Concentration Risk | Total long-lived assets
Summary Of Significant Accounting Policies [Line Items]
Concentration risk									12.00%	10.90%	12.10%
Outside the United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues									$ 627,400	$ 564,400	$ 515,200
Net investments in real estate	3,700,000				3,800,000				3,700,000	3,800,000	3,100,000
United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues									2,600,000	2,500,000	1,900,000
Net investments in real estate	10,600,000				11,100,000				10,600,000	11,100,000	10,500,000
United Kingdom
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues									288,200	295,300	275,100
Net investments in real estate	$ 1,700,000				$ 1,600,000				$ 1,700,000	$ 1,600,000	$ 1,700,000

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Reclassification (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Land	$ 804,830	$ 859,113
Buildings and improvements	15,449,884	15,610,992
Construction in progress and space held for development	1,732,555	1,621,928
Land held for future development	$ 147,597	162,941
Previously Reported
Summary Of Significant Accounting Policies [Line Items]
Land		1,509,764
Buildings and improvements		16,745,210
Restatement Adjustment
Summary Of Significant Accounting Policies [Line Items]
Land		(650,651)
Buildings and improvements		(1,134,218)
Construction in progress and space held for development		1,621,928
Land held for future development		$ 162,941

Business Combinations - Ascenty

Business Combinations - Ascenty Acquisition (Details) - USD ($) $ in Thousands	Dec. 20, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill		$ 3,363,070	$ 4,348,007	$ 3,389,595
Ascenty
Business Acquisition [Line Items]
Cash and equity consideration	$ 1,958,667
Cash and cash equivalents	116,000
Buildings and improvements	425,000
Goodwill	982,667		$ 982,667	$ 0
Other assets	30,000
Other liabilities	(40,000)
Capital lease and other long-term obligations	(50,000)
Ascenty | Digital Realty Operating Partnership Units
Business Acquisition [Line Items]
Equity interest in exchange for units	254,000
Ascenty | Secured Term Loan | Secured Term Loan, 5 Year
Business Acquisition [Line Items]
Long-term debt	$ 600,000
Debt instrument term	5 years
Ascenty | Secured Term Loan | Unsecured Debt.
Business Acquisition [Line Items]
Long-term debt	$ 1,000,000
Ascenty | Tenant relationship value.
Business Acquisition [Line Items]
Intangible assets	375,000
Ascenty | Acquired in-place lease value
Business Acquisition [Line Items]
Intangible assets	$ 120,000

Business Combinations - Ascen_2

Business Combinations - Ascenty Deconsolidation (Details) - USD ($) $ in Thousands	Mar. 29, 2019	Dec. 31, 2019	Dec. 31, 2017	Mar. 31, 2019
Deconsolidation of Ascenty and consolidated joint venture:
Gain on deconsolidation, net	$ 67,500	$ 67,497	$ 0
Subsidiary of Operating Partnership subsidiary
Deconsolidation of Ascenty and consolidated joint venture:
Ownership percentage in joint ventures	51.00%
Corporate Joint Venture
Deconsolidation of Ascenty and consolidated joint venture:
Estimated fair value of JV	$ 727,000
Gain on remeasurement of retained equity interest	43,700
Foreign currency translation loss	$ 21,700
Corporate Joint Venture | Operating Partnership
Deconsolidation of Ascenty and consolidated joint venture:
Ownership percentage in joint ventures	51.00%	51.00%
Brookfield Infrastructure
Deconsolidation of Ascenty and consolidated joint venture:
Equity Method Investments	$ 702,000
Ownership percentage in joint ventures	49.00%
Brookfield Infrastructure | Corporate Joint Venture
Deconsolidation of Ascenty and consolidated joint venture:
Equity Method Investments	$ 702,000
Ownership percentage in joint ventures	49.00%
Ascenty
Deconsolidation of Ascenty and consolidated joint venture:
Ownership percentage in joint ventures		51.00%
Ascenty | Subsidiary of Operating Partnership subsidiary
Deconsolidation of Ascenty and consolidated joint venture:
Ownership interest by noncontrolling interest	2.00%	2.00%
Ascenty | Brookfield Infrastructure
Deconsolidation of Ascenty and consolidated joint venture:
Equity Method Investments				$ 702,000
Ownership percentage in joint ventures				49.00%

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
Assets:
Operating lease assets	$ 628,681	$ 683,900
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Operating lease assets
Finance lease assets	$ 131,072
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Investment Building and Building Improvements
Total leased assets	$ 759,753
Liabilities:
Operating lease liabilities	$ 693,539
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Operating lease liabilities
Finance lease liabilities	$ 178,086
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Accounts Payable and Accrued Liabilities
Total lease liabilities	$ 871,625
Operating lease assets, accumulated depreciation and amortization	51,700
Finance lease assets, accumulated depreciation and amortization	$ 4,900

Leases - Lease Expense (Details

Leases - Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Finance lease cost:
Amortization of right-of-use assets	$ 5,074
Interest on lease liabilities	6,044
Operating lease cost	90,980
Total lease cost	$ 102,098

Leases (Narrative) (Details)

Leases (Narrative) (Details)	Dec. 31, 2019
Leases
Weighted average remaining lease term, operating lease	12 years
Weighted average remaining lease term, finance lease	24 years
Incremental borrowing rate, operating lease	4.10%
Incremental borrowing rate, finance lease	3.50%

Leases - Operating Leases under

Leases - Operating Leases under ASC840 (Details) $ in Thousands	Dec. 31, 2018USD ($)
Minimum commitment under operating leases - ASC 840
2019	$ 84,712
2020	87,396
2021	86,212
2022	81,976
2023	80,707
Thereafter	539,047
Total	$ 960,050

Leases - Capital Lease Obligati

Leases - Capital Lease Obligations under ASC 840 (Details) $ in Thousands	Dec. 31, 2018USD ($)
Capital lease obligations under ASC 840
2019	$ 11,657
2020	13,108
2021	13,207
2022	13,706
2023	14,219
Thereafter	285,774
Total	351,671
Less amount representing interest	(137,827)
Present value	$ 213,844

Leases - Maturities of Lease Li

Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2019USD ($)
Operating lease liabilities
2020	$ 85,277
2021	84,796
2022	81,021
2023	79,751
2024	73,612
Thereafter	478,241
Total undiscounted future cash flows	882,698
Less: Imputed interest	(189,159)
Present value of undiscounted future cash flows	693,539
Finance lease liabilities
2020	8,881
2021	8,927
2022	9,399
2023	9,865
2024	9,914
Thereafter	226,261
Total undiscounted future cash flows	273,247
Less: Imputed interest	(95,161)
Present value of undiscounted future cash flows	$ 178,086

Leases (Minimum Lease Payments

Leases (Minimum Lease Payments From Customers) (Details) $ in Thousands	Dec. 31, 2019USD ($)
Future Minimum Payments Receivable on Operating Leases
2020	$ 2,810,508
2021	1,947,216
2022	1,552,045
2023	1,333,620
2024	1,089,305
Thereafter	4,091,199
Total	$ 12,823,893

Investments in Real Estate (Sch

Investments in Real Estate (Schedule of Real Estate Property Acquisitions) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Real Estate Properties [Line Items]
Land	$ 804,830	$ 859,113
Acquired ground leases	10,725	10,575
Buildings and improvements	15,449,884	15,610,992
Tenant improvements	621,153	574,336
Accumulated Depreciation and Amortization	4,536,169	3,935,267
Net Investments in Operating Properties	12,350,423	13,119,749
Construction in progress	1,732,555	1,621,928
Land Held For Future Development	147,597	162,941
Net investments in properties	14,230,575	14,904,618
Internet Gateway Datacenters [Member]
Real Estate Properties [Line Items]
Land	99,653	99,313
Acquired ground leases	0	0
Buildings and improvements	2,133,198	2,036,041
Tenant improvements	126,264	114,013
Accumulated Depreciation and Amortization	995,202	885,214
Net Investments in Operating Properties	1,363,913	1,364,153
Construction in progress	85,605	42,615
Net investments in properties	1,449,518	1,406,768
Corporate Datacenters [Member]
Real Estate Properties [Line Items]
Land	659,184	688,494
Acquired ground leases	10,725	10,575
Buildings and improvements	13,046,742	12,924,596
Tenant improvements	494,052	460,247
Accumulated Depreciation and Amortization	3,481,542	3,004,365
Net Investments in Operating Properties	10,729,161	11,079,547
Construction in progress	1,543,534	1,548,643
Land Held For Future Development	147,597	157,039
Net investments in properties	12,420,292	12,785,229
Technology Manufacturing [Member]
Real Estate Properties [Line Items]
Land	11,959	11,959
Acquired ground leases	0	0
Buildings and improvements	1,603	1,582
Tenant improvements	76	76
Accumulated Depreciation and Amortization	161	100
Net Investments in Operating Properties	13,477	13,517
Construction in progress	10
Net investments in properties	13,487	13,517
Technology Office [Member]
Real Estate Properties [Line Items]
Land	27,807	58,066
Acquired ground leases	0	0
Buildings and improvements	29,071	26,106
Tenant improvements	0
Accumulated Depreciation and Amortization	22,188	20,015
Net Investments in Operating Properties	34,690	64,157
Construction in progress	59,229
Net investments in properties	93,919	64,157
Other Investments In Real Estate [Member]
Real Estate Properties [Line Items]
Land	6,227	1,281
Acquired ground leases	0	0
Buildings and improvements	239,270	622,667
Tenant improvements	761
Accumulated Depreciation and Amortization	37,076	25,573
Net Investments in Operating Properties	209,182	598,375
Construction in progress	44,177	30,670
Land Held For Future Development		5,902
Net investments in properties	$ 253,359	$ 634,947

Investments in Real Estate (Hel

Investments in Real Estate (Held for Sale) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)property	Sep. 16, 2019USD ($)property
Scenario, Forecast
Business Acquisition [Line Items]
Period of transitional property management services provided after closing on sale of real estate	1 year
Data Centers | 10 Powered Base Building | Disposal Group, Held-for-sale, Not Discontinued Operations
Business Acquisition [Line Items]
Number of properties, classified as held for sale | property		12
Purchase consideration receivable		$ 557
Data Centers | 10 Powered Base Building | Disposal Group, Held-for-sale, Not Discontinued Operations | Scenario, Forecast
Business Acquisition [Line Items]
Number of properties sold | property	12
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 303.3
Data Centers | 10 Powered Base Building | Disposal Group, Held-for-sale, Not Discontinued Operations | Assets Held For Sale [Member]
Business Acquisition [Line Items]
Carrying value of real estate held-for-sale		229.9
Data Centers | 10 Powered Base Building | Disposal Group, Held-for-sale, Not Discontinued Operations | Obligations Associated With Assets Held For Sale [Member]
Business Acquisition [Line Items]
Carrying value of real estate held-for-sale		$ 2.7
Data Centers | United States.
Business Acquisition [Line Items]
Number of properties, classified as held for sale | property		12

Investments in Real Estate (Acq

Investments in Real Estate (Acquisitions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Purchase price	$ 75.7	$ 410.7
Land parcels
Business Acquisition [Line Items]
Purchase price	47.7	296.1
Data Centers
Business Acquisition [Line Items]
Purchase price		$ 114.6
Technology Office [Member]
Business Acquisition [Line Items]
Purchase price	$ 28

Investments in Real Estate (Pur

Investments in Real Estate (Purchase Price Allocation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Land	$ 72,027	$ 356,704
Buildings and Improvements	3,039	54,008
Tenant Improvements	0	0
Below-Market Leases	(148,774)	(200,113)
Acquisition Date Fair Value	75,704	410,712
Acquired above-market leases
Business Acquisition [Line Items]
Intangibles	$ 0	0
Weighted average remaining intangible amortization life (in months)	2 years 6 months
Acquired in-place lease value
Business Acquisition [Line Items]
Intangibles	$ 638	0
Weighted average remaining intangible amortization life (in months)	5 years 9 months 18 days
Acquired below-market leases
Business Acquisition [Line Items]
Below-Market Leases	$ 0	0
Land Parcels
Business Acquisition [Line Items]
Land	47,712	296,071
Buildings and Improvements	0	0
Tenant Improvements	0	0
Acquisition Date Fair Value	47,712	296,071
Land Parcels | Acquired above-market leases
Business Acquisition [Line Items]
Intangibles	0	0
Land Parcels | Acquired in-place lease value
Business Acquisition [Line Items]
Intangibles	0	0
Land Parcels | Acquired below-market leases
Business Acquisition [Line Items]
Below-Market Leases	0	0
Data Centers
Business Acquisition [Line Items]
Land		60,633
Buildings and Improvements		54,008
Tenant Improvements		0
Acquisition Date Fair Value		114,641
Data Centers | Acquired above-market leases
Business Acquisition [Line Items]
Intangibles		0
Data Centers | Acquired in-place lease value
Business Acquisition [Line Items]
Intangibles		0
Data Centers | Acquired below-market leases
Business Acquisition [Line Items]
Below-Market Leases		$ 0
Technology Office [Member]
Business Acquisition [Line Items]
Land	24,315
Buildings and Improvements	3,039
Tenant Improvements	0
Acquisition Date Fair Value	27,992
Technology Office [Member] | Acquired above-market leases
Business Acquisition [Line Items]
Intangibles	0
Technology Office [Member] | Acquired in-place lease value
Business Acquisition [Line Items]
Intangibles	638
Technology Office [Member] | Acquired below-market leases
Business Acquisition [Line Items]
Below-Market Leases	$ 0

Investments in Real Estate (Dis

Investments in Real Estate (Dispositions) (Details) - Disposed of by Sale - USD ($) $ in Millions	Nov. 04, 2019	Sep. 21, 2018	May 31, 2018	May 22, 2018	Apr. 19, 2018	Mar. 14, 2018	Feb. 09, 2018	Jan. 25, 2018	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds									$ 291.7
Gain (loss) on sale									$ 80.4
Mapletree Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	$ 996.6
Gain (loss) on sale	$ 266
200 Quannapowitt Parkway
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds								$ 15
Gain (loss) on sale								$ (0.4)
34551 Ardenwood Boulevard
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds							$ 73.3
Gain (loss) on sale							$ 25.3
3065 Gold Camp Drive
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds						$ 14.2
Gain (loss) on sale						5.4
11085 Sun Center Drive
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds						36.8
Gain (loss) on sale						$ 9.1
Austin Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds					$ 47.6
Gain (loss) on sale					$ 12
2010 East Centennial Circle
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds				$ 5.5
Gain (loss) on sale				$ (0.5)
1125 Energy Park Drive
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds			$ 7
Gain (loss) on sale			$ 2.8
360 Spear Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds		$ 92.3
Gain (loss) on sale		$ 26.7

Investments in Unconsolidated_3

Investments in Unconsolidated Joint Ventures (Equity method of Accounting Presented in our consolidated balance sheets) (Details) $ in Thousands	Dec. 31, 2019USD ($)property	Mar. 29, 2019	Dec. 31, 2018USD ($)property	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Number of Data Centers	225		214
Investments in unconsolidated joint ventures	$ 1,287,109		$ 175,108
Noncontrolling interests in consolidated joint ventures	$ 20,625		$ 93,056
Ascenty
Schedule of Equity Method Investments [Line Items]
Number of Data Centers | property	19
% Ownership	51.00%
Investments in unconsolidated joint ventures	$ 774,853
Noncontrolling interests in consolidated joint ventures	$ 25,000
Ascenty | Subsidiary of Operating Partnership subsidiary
Schedule of Equity Method Investments [Line Items]
Ownership interest by noncontrolling interest	2.00%	2.00%
Mapletree JV
Schedule of Equity Method Investments [Line Items]
Number of Data Centers | property	3
% Ownership	20.00%
Investments in unconsolidated joint ventures	$ 208,354
CenturyLink
Schedule of Equity Method Investments [Line Items]
Number of Data Centers | property	1
% Ownership	50.00%		50.00%	50.00%
Investments in unconsolidated joint ventures	$ 88,647		$ 96,094
Mitsubishi
Schedule of Equity Method Investments [Line Items]
Number of Data Centers | property	4
% Ownership	50.00%		50.00%	50.00%
Investments in unconsolidated joint ventures	$ 200,652		$ 66,835
Other
Schedule of Equity Method Investments [Line Items]
Number of Data Centers | property	14
Investments in unconsolidated joint ventures	$ 14,603		$ 12,179

Investments in Unconsolidated_4

Investments in Unconsolidated Joint Ventures - Mapletree Joint Venture (Details) $ in Millions	Nov. 04, 2019property	Nov. 01, 2019USD ($)
Schedule of Equity Method Investments [Line Items]
Number of data centers contributed to JV | property	3
Mapletree JV
Schedule of Equity Method Investments [Line Items]
Total consideration of assets and liabilities acquired		$ 1,000
Percentage of interest acquired in JV		20.00%
Proceeds from joint venture		$ 800
Equity Method Investments, Fair Value Disclosure		193.2
Venture Capital Gain (Loss), Net		266.2
Equity, Fair Value Adjustment		53.2
Mapletree JV | Mapletree [Member]
Schedule of Equity Method Investments [Line Items]
Total consideration of assets and liabilities acquired		$ 800
Mapletree JV | Mapletree Investments and Mapletree Industrial Trust
Schedule of Equity Method Investments [Line Items]
Percentage of interest acquired in JV		80.00%

Investments in Unconsolidated_5

Investments in Unconsolidated Joint Ventures (Summary of Financial Information for Joint Ventures) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Equity / (Deficit)	$ 1,287,109
Investments in unconsolidated joint ventures	1,287,109	$ 175,108	$ 163,477
Equity in earnings of unconsolidated joint ventures	8,067	32,979	25,516
Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Net Investment in Properties	2,627,689	1,070,661	1,061,950
Total Assets	4,877,750	1,371,431	1,375,006
Mortgage Loans	1,360,384	728,338	712,690
Total Liabilities	1,680,946	876,157	869,879
Equity / (Deficit)	3,196,804	495,274	505,127
Revenues	379,600	214,815	151,965
Property Operating Expense	(143,143)	(75,826)	(49,230)
Net Operating Income	236,457	138,989	102,735
Net Income (Loss)	$ 8,357	$ 47,222	$ 43,944
2001 Sixth Avenue
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	50.00%	50.00%	50.00%
Net Investment in Properties	$ 30,748	$ 32,786	$ 26,933
Total Assets	47,485	49,278	50,481
Mortgage Loans	134,583	134,527	134,472
Total Liabilities	140,354	139,569	138,564
Equity / (Deficit)	(92,869)	(90,291)	(88,083)
Revenues	56,266	52,806	49,369
Property Operating Expense	(19,254)	(17,264)	(16,719)
Net Operating Income	37,012	35,542	32,650
Net Income (Loss)	$ 27,422	$ 25,612	$ 20,833
2020 Fifth Avenue
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	50.00%	50.00%	50.00%
Net Investment in Properties	$ 43,918	$ 44,644	$ 45,309
Total Assets	54,325	54,855	54,594
Mortgage Loans	48,000	48,000	47,000
Total Liabilities	48,703	48,333	47,249
Equity / (Deficit)	5,622	6,522	7,345
Revenues	9,868	9,417	9,088
Property Operating Expense	(2,544)	(2,156)	(1,820)
Net Operating Income	7,324	7,261	7,268
Net Income (Loss)	$ 4,649	$ 4,689	$ 4,881
CenturyLink
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	50.00%	50.00%	50.00%
Net Investment in Properties	$ 148,941	$ 151,256	$ 133,435
Total Assets	187,241	201,527	192,071
Total Liabilities	9,947	9,337	5,598
Equity / (Deficit)	177,294	192,190	186,473
Revenues	24,680	21,394	19,235
Property Operating Expense	(9,251)	(7,164)	(6,504)
Net Operating Income	15,429	14,230	12,731
Net Income (Loss)	$ 6,712	$ 6,958	$ 5,467
Mitsubishi
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	50.00%	50.00%	50.00%
Net Investment in Properties	$ 554,828	$ 332,373	$ 325,977
Total Assets	753,743	469,159	452,063
Mortgage Loans	231,046	228,075	221,851
Total Liabilities	303,130	285,424	288,962
Equity / (Deficit)	450,613	183,735	163,101
Revenues	84,344	59,300	7,927
Property Operating Expense	(39,300)	(26,360)	(4,218)
Net Operating Income	45,044	32,940	3,709
Net Income (Loss)	$ 18,751	$ 15,884	$ 1,108
Ascenty
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	51.00%
Net Investment in Properties	$ 548,114
Total Assets	2,178,663
Mortgage Loans	629,500
Total Liabilities	764,603
Equity / (Deficit)	1,414,060
Revenues	112,052
Property Operating Expense	(40,250)
Net Operating Income	71,802
Net Income (Loss)	$ (54,606)
Mapletree JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	20.00%
Net Investment in Properties	$ 765,443
Total Assets	1,042,661
Total Liabilities	23,796
Equity / (Deficit)	1,018,865
Revenues	17,852
Property Operating Expense	(6,774)
Net Operating Income	11,078
Net Income (Loss)	$ (1,872)
PREI
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	20.00%	20.00%	20.00%
Net Investment in Properties	$ 365,993	$ 375,016	$ 399,967
Total Assets	421,635	433,024	456,912
Mortgage Loans	210,915	210,626	207,687
Total Liabilities	281,344	283,899	285,050
Equity / (Deficit)	140,291	149,125	171,862
Revenues	42,157	42,058	41,464
Property Operating Expense	(9,918)	(8,457)	(7,978)
Net Operating Income	32,239	33,601	33,486
Net Income (Loss)	$ 9,968	$ (4,159)	$ 13,889
GCEAR
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures	20.00%	20.00%	20.00%
Net Investment in Properties	$ 109,803	$ 111,909	$ 114,376
Total Assets	127,444	139,268	151,191
Mortgage Loans	101,902	101,885	101,680
Total Liabilities	104,363	104,268	104,220
Equity / (Deficit)	23,081	35,000	46,971
Revenues	21,120	20,457	18,924
Property Operating Expense	(9,073)	(8,546)	(7,362)
Net Operating Income	12,047	11,911	11,562
Net Income (Loss)	(2,636)	$ (2,177)	$ (1,962)
Other
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint ventures		17.00%	17.00%
Net Investment in Properties	59,901	$ 22,677	$ 15,953
Total Assets	64,553	24,320	17,694
Mortgage Loans	4,438	5,225
Total Liabilities	4,706	5,327	236
Equity / (Deficit)	59,847	18,993	17,458
Revenues	11,261	9,383	5,958
Property Operating Expense	(6,779)	(5,879)	(4,629)
Net Operating Income	4,482	3,504	1,329
Net Income (Loss)	$ (31)	$ 415	$ (272)

Acquired Intangible Assets an_3

Acquired Intangible Assets and Liabilities (Summary of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Below-market lease, accumulated amortization	$ (247,735)	$ (242,422)
Acquired in-place lease value
Finite-Lived Intangible Assets [Line Items]
Gross amount	1,357,190	1,569,401
Accumulated amortization	(899,071)	(795,033)
Net	458,119	774,368
Tenant relationship value
Finite-Lived Intangible Assets [Line Items]
Gross amount	1,845,949	2,339,606
Accumulated amortization	(400,570)	(291,818)
Net	1,445,379	2,047,788
Acquired above-market leases
Finite-Lived Intangible Assets [Line Items]
Gross amount	279,048	277,796
Accumulated amortization	(204,233)	(158,037)
Net	74,815	119,759
Acquired below-market leases
Finite-Lived Intangible Assets [Line Items]
Gross amount	396,509	442,535
Accumulated amortization	(247,735)	(242,422)
Net	$ 148,774	$ 200,113

Acquired Intangible Assets an_4

Acquired Intangible Assets and Liabilities (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired leases	$ (17,100)	$ (27,300)	$ (2,200)
Expected average remaining lives of acquired below market leases (in years)	8 years
Amortization of acquired in-place lease value and deferred leasing costs	$ 354,302	416,621	247,468
Acquired above-market leases
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives (in years)	2 years 6 months
Acquired in-place lease value
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives (in years)	5 years 9 months 18 days
Amortization of acquired in-place lease value and deferred leasing costs	$ 143,000	211,000	101,200
Weighted average remaining contractual life for acquired leases excluding renewals or extensions (in years)	5 years 6 months
Tenant relationship value
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired in-place lease value and deferred leasing costs	$ 128,400	$ 123,500	$ 85,900
Weighted average remaining contractual life for acquired leases excluding renewals or extensions (in years)	13 years

Acquired Intangible Assets an_5

Acquired Intangible Assets and Liabilities (Schedule of Estimated Annual Amortization of Below Market Leases) (Details) - Below-Market Leases, Net of Above-Market Leases $ in Thousands	Dec. 31, 2019USD ($)
Finite-Lived Intangible Assets [Line Items]
2020	$ (10,648)
2021	(3,501)
2022	4,735
2023	9,500
2024	10,149
Thereafter	63,724
Total	$ 73,959

Acquired Intangible Assets An_6

Acquired Intangible Assets And Liabilities (Schedule of Estimated Annual Amortization of Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Acquired in-place lease value
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020	$ 98,875
2021	78,329
2022	58,621
2023	47,449
2024	40,217
Thereafter	134,628
Net	458,119	$ 774,368
Tenant relationships
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020	116,673
2021	116,673
2022	116,673
2023	116,673
2024	116,673
Thereafter	862,014
Net	$ 1,445,379

Debt of the Company (Narrative)

Debt of the Company (Narrative) (Details) - Senior Notes	Dec. 31, 2019
3.950% notes due 2022 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	3.95%
3.625% notes due 2022 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	3.625%
2.750% notes due 2023 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	2.75%
4.750% notes due 2025 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	4.75%
3.700% notes due 2027 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	3.70%
4.450% notes due 2028 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	4.45%
3.600% notes due 2029 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	3.60%
4.750% notes due 2023
Debt Instrument [Line Items]
Stated interest rate	4.75%
2.750% notes due 2024
Debt Instrument [Line Items]
Stated interest rate	2.75%
4.250% notes due 2025
Debt Instrument [Line Items]
Stated interest rate	4.25%
3.300% notes due 2029
Debt Instrument [Line Items]
Stated interest rate	3.30%
3.750% notes due 2030
Debt Instrument [Line Items]
Stated interest rate	3.75%
2.625% notes due 2024
Debt Instrument [Line Items]
Stated interest rate	2.625%
2.500% notes due 2026
Debt Instrument [Line Items]
Stated interest rate	2.50%
1.125% notes due 2028
Debt Instrument [Line Items]
Stated interest rate	1.125%

Debt of the Operating Partner_3

Debt of the Operating Partnership (Summary of Outstanding Indebtedness) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)item	Dec. 31, 2018USD ($)
Unsecured term loans | 2019 Term Loan | Base Rate
Debt Instrument [Line Items]
Interest rate basis spread	1.00%
Unsecured senior notes | Floating rate notes due 2019 | EURIBOR
Debt Instrument [Line Items]
Interest rate basis spread	0.50%
Senior Notes | 4.750% notes due 2023
Debt Instrument [Line Items]
Stated interest rate	4.75%
Senior Notes | 2.625% notes due 2024
Debt Instrument [Line Items]
Stated interest rate	2.625%
Senior Notes | 2.750% notes due 2024
Debt Instrument [Line Items]
Stated interest rate	2.75%
Senior Notes | 4.250% notes due 2025
Debt Instrument [Line Items]
Stated interest rate	4.25%
Senior Notes | 2.500% notes due 2026
Debt Instrument [Line Items]
Stated interest rate	2.50%
Senior Notes | 1.125% notes due 2028
Debt Instrument [Line Items]
Stated interest rate	1.125%
Senior Notes | 3.300% notes due 2029
Debt Instrument [Line Items]
Stated interest rate	3.30%
Senior Notes | 3.750% notes due 2030
Debt Instrument [Line Items]
Stated interest rate	3.75%
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Long-term debt, gross	$ 10,205,433
Debt Instrument, Unamortized Discount	22,554
Total indebtedness	10,122,448	$ 11,101,479
Unamortized net premiums	6,463
Long-term debt, net of discount (premium)	10,189,342
Digital Realty Trust, L.P. | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross	245,766	1,663,156
Debt Instrument, Unamortized Discount	0
Deferred financing costs	(11,661)	(15,421)
Total indebtedness	234,105	1,647,735
Unamortized net premiums	0
Long-term debt, net of discount (premium)	$ 245,766
Interest rate basis spread	90.00%
Commitment fee percentage	20.00%
Number of extension options | item	2
Debt instrument, extension term	6 months
Digital Realty Trust, L.P. | Yen Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 146,451	134,564
Interest rate basis spread	50.00%
Commitment fee percentage	10.00%
Digital Realty Trust, L.P. | Unsecured term loans
Debt Instrument [Line Items]
Long-term debt, gross	$ 813,205
Debt Instrument, Unamortized Discount	0
Deferred financing costs	(2,986)	(4,216)
Total indebtedness	810,219	1,178,904
Unamortized net premiums	0
Long-term debt, net of discount (premium)	$ 813,205
Debt instrument, extension term	6 months
Digital Realty Trust, L.P. | Unsecured term loans | 2023 and 2024 Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 813,205	808,120
Interest rate basis spread	100.00%
Digital Realty Trust, L.P. | Unsecured term loans | 2019 Term Loan
Debt Instrument [Line Items]
Long-term debt, gross		375,000
Digital Realty Trust, L.P. | Unsecured term loans | 2023 Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 300,000	300,000
Digital Realty Trust, L.P. | Unsecured term loans | 2024 Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	513,205	508,120
Digital Realty Trust, L.P. | Unsecured senior notes
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	16,145	19,859
Deferred financing costs	(52,038)	(40,553)
Total indebtedness	8,973,190	7,589,126
Long-term debt, net of discount (premium)	$ 9,025,228	7,629,679
Digital Realty Trust, L.P. | Unsecured senior notes | Floating rate notes due 2019
Debt Instrument [Line Items]
Long-term debt, gross		143,338
Digital Realty Trust, L.P. | Unsecured senior notes | 5.875% notes due 2020
Debt Instrument [Line Items]
Long-term debt, gross		500,000
Stated interest rate	5.875%
Digital Realty Trust, L.P. | Unsecured senior notes | 3.400% notes due 2020
Debt Instrument [Line Items]
Long-term debt, gross		500,000
Stated interest rate	3.40%
Digital Realty Trust, L.P. | Unsecured senior notes | 5.250% notes due 2021
Debt Instrument [Line Items]
Long-term debt, gross		400,000
Stated interest rate	5.25%
Digital Realty Trust, L.P. | Unsecured senior notes | 3.950% notes due 2022
Debt Instrument [Line Items]
Long-term debt, gross	$ 500,000	500,000
Stated interest rate	3.95%
Aggregate principal amount	$ 500,000
Digital Realty Trust, L.P. | Unsecured senior notes | 3.625% notes due 2022
Debt Instrument [Line Items]
Long-term debt, gross	$ 300,000	300,000
Stated interest rate	3.625%
Aggregate principal amount	$ 300,000
Digital Realty Trust, L.P. | Unsecured senior notes | 2.750% notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 350,000	350,000
Stated interest rate	2.75%
Aggregate principal amount	$ 350,000
Digital Realty Trust, L.P. | Unsecured senior notes | 4.750% notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 397,710	382,620
Stated interest rate	4.75%
Digital Realty Trust, L.P. | Unsecured senior notes | 2.625% notes due 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 672,780	688,020
Stated interest rate	2.625%
Digital Realty Trust, L.P. | Unsecured senior notes | 2.750% notes due 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 331,425	318,850
Stated interest rate	2.75%
Digital Realty Trust, L.P. | Unsecured senior notes | 4.250% notes due 2025
Debt Instrument [Line Items]
Long-term debt, gross	$ 530,280	510,160
Stated interest rate	4.25%
Digital Realty Trust, L.P. | Unsecured senior notes | 4.750% notes due 2025
Debt Instrument [Line Items]
Long-term debt, gross	$ 450,000	450,000
Stated interest rate	4.75%
Digital Realty Trust, L.P. | Unsecured senior notes | 2.500% notes due 2026
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,205,398	0
Stated interest rate	2.50%
Digital Realty Trust, L.P. | Unsecured senior notes | 3.700% notes due 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,000,000	1,000,000
Stated interest rate	3.70%
Aggregate principal amount	$ 1,000,000
Digital Realty Trust, L.P. | Unsecured senior notes | 1.125% notes due 2028
Debt Instrument [Line Items]
Long-term debt, gross	$ 560,650	0
Stated interest rate	1.125%
Digital Realty Trust, L.P. | Unsecured senior notes | 4.450% notes due 2028
Debt Instrument [Line Items]
Long-term debt, gross	$ 650,000	650,000
Stated interest rate	4.45%
Aggregate principal amount	$ 650,000
Digital Realty Trust, L.P. | Unsecured senior notes | 3.600% notes due 2029
Debt Instrument [Line Items]
Long-term debt, gross	$ 900,000	0
Stated interest rate	3.60%
Aggregate principal amount	$ 900,000
Digital Realty Trust, L.P. | Unsecured senior notes | 3.300% notes due 2029
Debt Instrument [Line Items]
Long-term debt, gross	$ 463,995	446,390
Stated interest rate	3.30%
Digital Realty Trust, L.P. | Unsecured senior notes | 3.750% notes due 2030
Debt Instrument [Line Items]
Long-term debt, gross	$ 729,135	510,160
Stated interest rate	3.75%
Digital Realty Trust, L.P. | Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 9,041,373
Debt Instrument, Unamortized Discount	22,554
Unamortized net premiums	6,409
Long-term debt, net of discount (premium)	$ 9,025,228
Digital Realty Trust, L.P. | Senior Notes | 3.950% notes due 2022
Debt Instrument [Line Items]
Stated interest rate	3.95%
Digital Realty Trust, L.P. | Senior Notes | 3.625% notes due 2022
Debt Instrument [Line Items]
Stated interest rate	3.625%
Digital Realty Trust, L.P. | Senior Notes | 2.750% notes due 2023
Debt Instrument [Line Items]
Stated interest rate	2.75%
Digital Realty Trust, L.P. | Senior Notes | 4.750% notes due 2025
Debt Instrument [Line Items]
Stated interest rate	4.75%
Digital Realty Trust, L.P. | Senior Notes | 3.700% notes due 2027
Debt Instrument [Line Items]
Stated interest rate	3.70%
Digital Realty Trust, L.P. | Senior Notes | 4.450% notes due 2028
Debt Instrument [Line Items]
Stated interest rate	4.45%
Digital Realty Trust, L.P. | Senior Notes | 3.600% notes due 2029
Debt Instrument [Line Items]
Stated interest rate	3.60%
Digital Realty Trust, L.P. | Secured Debt.
Debt Instrument [Line Items]
Long-term debt, gross	$ 105,089
Debt Instrument, Unamortized Discount	0
Deferred financing costs	(209)	(20,210)
Total indebtedness	104,934	685,714
Unamortized net premiums	54	148
Long-term debt, net of discount (premium)	105,143	705,924
Digital Realty Trust, L.P. | Secured Debt. | 731 East Trade Street
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,089	1,776
Stated interest rate	8.22%
Digital Realty Trust, L.P. | Secured Debt. | Secured note due March 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 104,000	104,000
Digital Realty Trust, L.P. | Secured Debt. | Secured note due March 2023 | LIBOR
Debt Instrument [Line Items]
Interest rate basis spread	1.00%
Digital Realty Trust, L.P. | Secured Debt. | Secured note due December 2023
Debt Instrument [Line Items]
Long-term debt, gross		$ 600,000
Digital Realty Trust, L.P. | Secured Debt. | Secured note due December 2023 | Base Rate
Debt Instrument [Line Items]
Interest rate basis spread	4.25%

Debt of the Operating Partner_4

Debt of the Operating Partnership (Floating and Base Rate Borrowing) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)$ / $$ / $$ / $$ / $$ / €$ / £	Dec. 31, 2018$ / €	Dec. 31, 2018$ / $	Dec. 31, 2018$ / ¥	Dec. 31, 2018$ / $	Dec. 31, 2018$ / $	Dec. 31, 2018$ / £	Dec. 31, 2018$ / $	Dec. 31, 2018USD ($)	Dec. 31, 2018
3.750% notes due 2030 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate		3.75%
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Long-term debt, gross		$ 10,205,433
Digital Realty Trust, L.P. | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross		$ 245,766								$ 1,663,156
Weighted-average interest rate		1.00%									2.41%
Interest rate basis spread		90.00%
Commitment fee percentage		20.00%
Letters of credit issued		$ 45,200
Digital Realty Trust, L.P. | Yen Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross		$ 146,451								134,564
Weighted-average interest rate		0.50%									0.50%
Interest rate basis spread		50.00%
Commitment fee percentage		10.00%
Digital Realty Trust, L.P. | Unsecured term loans
Debt Instrument [Line Items]
Long-term debt, gross		$ 813,205
Digital Realty Trust, L.P. | Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross		9,041,373
Digital Realty Trust, L.P. | Secured Debt.
Debt Instrument [Line Items]
Long-term debt, gross		105,089
Digital Realty Trust, L.P. | 2023 and 2024 Term Loan | Unsecured term loans
Debt Instrument [Line Items]
Long-term debt, gross		$ 813,205								808,120
Weighted-average interest rate		2.62%									3.17%
Interest rate basis spread		100.00%
Digital Realty Trust, L.P. | 2023 and 2024 Term Loan | Unsecured term loans | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate		2.39%									2.66%
Digital Realty Trust, L.P. | 3.750% notes due 2030 | Unsecured senior notes
Debt Instrument [Line Items]
Long-term debt, gross		$ 729,135								510,160
Stated interest rate		3.75%
Digital Realty Trust, L.P. | 5.875% notes due 2020 | Unsecured term loans
Debt Instrument [Line Items]
Early extinguishment charge	$ 12,900
Digital Realty Trust, L.P. | 5.875% notes due 2020 | Unsecured senior notes
Debt Instrument [Line Items]
Long-term debt, gross										500,000
Stated interest rate		5.875%
Digital Realty Trust, L.P. | 3.400% notes due 2020 | Unsecured senior notes
Debt Instrument [Line Items]
Long-term debt, gross										500,000
Stated interest rate		3.40%
Digital Realty Trust, L.P. | 3.400% 2020 Notes and 2021 Notes | Unsecured term loans
Debt Instrument [Line Items]
Early extinguishment charge		$ 26,300
Digital Realty Trust, L.P. | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross		$ 99,315								1,528,592
Weighted-average interest rate		1.75%									2.57%
Interest rate basis spread		90.00%
Digital Realty Trust, L.P. | U.S. dollar ($) | 2023 and 2024 Term Loan | Unsecured term loans
Debt Instrument [Line Items]
Long-term debt, gross		$ 300,000								300,000
Weighted-average interest rate		2.74%									3.46%
Digital Realty Trust, L.P. | U.S. dollar ($) | 2023 and 2024 Term Loan | Unsecured term loans | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate		2.44%									2.44%
Digital Realty Trust, L.P. | U.S. dollar ($) | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross										890,000
Weighted-average interest rate											3.37%
Digital Realty Trust, L.P. | British pound sterling () | Global revolving credit facilities, net
Debt Instrument [Line Items]
Exchange rate | $ / £								1.28
Digital Realty Trust, L.P. | British pound sterling () | Unsecured senior notes
Debt Instrument [Line Items]
Exchange rate | $ / £		1.33						1.28
Digital Realty Trust, L.P. | British pound sterling () | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross										8,290
Weighted-average interest rate											1.61%
Digital Realty Trust, L.P. | Euro () | Global revolving credit facilities, net
Debt Instrument [Line Items]
Exchange rate | $ / €		1.12	1.15
Digital Realty Trust, L.P. | Euro () | Unsecured senior notes
Debt Instrument [Line Items]
Exchange rate | $ / €		1.12	1.15
Digital Realty Trust, L.P. | Euro () | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross		$ 44,852								451,800
Weighted-average interest rate		0.90%									0.90%
Digital Realty Trust, L.P. | Australian dollar (AUD) | Global revolving credit facilities, net
Debt Instrument [Line Items]
Exchange rate | $ / $		0.70				0.70
Digital Realty Trust, L.P. | Australian dollar (AUD) | 2023 and 2024 Term Loan | Unsecured term loans
Debt Instrument [Line Items]
Long-term debt, gross		$ 203,820								204,632
Weighted-average interest rate		1.85%									2.94%
Exchange rate | $ / $						0.70
Digital Realty Trust, L.P. | Australian dollar (AUD) | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross		$ 1,264								27,632
Weighted-average interest rate		1.74%									2.82%
Digital Realty Trust, L.P. | Hong Kong dollar (HKD) | Global revolving credit facilities, net
Debt Instrument [Line Items]
Exchange rate | $ / $									0.13
Digital Realty Trust, L.P. | Hong Kong dollar (HKD) | 2023 and 2024 Term Loan | Unsecured term loans
Debt Instrument [Line Items]
Long-term debt, gross		$ 85,629								85,188
Weighted-average interest rate		3.60%									3.32%
Exchange rate | $ / $		0.13							0.13
Digital Realty Trust, L.P. | Hong Kong dollar (HKD) | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross										8,797
Weighted-average interest rate											3.14%
Digital Realty Trust, L.P. | Japanese yen (JPY) | Global revolving credit facilities, net
Debt Instrument [Line Items]
Exchange rate		0.01			0.01						0.01
Digital Realty Trust, L.P. | Japanese yen (JPY) | Unsecured term loans
Debt Instrument [Line Items]
Exchange rate | $ / $		0.70
Digital Realty Trust, L.P. | Japanese yen (JPY) | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross										4,105
Weighted-average interest rate											0.90%
Digital Realty Trust, L.P. | Singapore dollar (SGD) | Global revolving credit facilities, net
Debt Instrument [Line Items]
Exchange rate | $ / $		0.74		0.73
Digital Realty Trust, L.P. | Singapore dollar (SGD) | 2023 and 2024 Term Loan | Unsecured term loans
Debt Instrument [Line Items]
Long-term debt, gross		$ 147,931								146,080
Weighted-average interest rate		2.68%									2.76%
Exchange rate | $ / $		0.74		0.73
Digital Realty Trust, L.P. | Singapore dollar (SGD) | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross		$ 53,199								77,112
Weighted-average interest rate		2.46%									2.79%
Digital Realty Trust, L.P. | Canadian dollar (CAD)
Debt Instrument [Line Items]
Exchange rate | $ / $		0.77					0.73
Digital Realty Trust, L.P. | Canadian dollar (CAD) | Global revolving credit facilities, net
Debt Instrument [Line Items]
Exchange rate | $ / $							0.73
Digital Realty Trust, L.P. | Canadian dollar (CAD) | 2023 and 2024 Term Loan | Unsecured term loans
Debt Instrument [Line Items]
Long-term debt, gross		$ 75,825								72,220
Weighted-average interest rate		3.00%									3.24%
Exchange rate | $ / $		0.77					0.73
Digital Realty Trust, L.P. | Canadian dollar (CAD) | 2023 and 2024 Term Loan | Unsecured term loans | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate		1.78%									1.78%
Digital Realty Trust, L.P. | Canadian dollar (CAD) | Floating Rate | Global revolving credit facilities, net
Debt Instrument [Line Items]
Long-term debt, gross										$ 60,856
Weighted-average interest rate											3.16%

Debt of the Operating Partner_5

Debt of the Operating Partnership (Global Revolving Credit Facilities) (Narrative) (Details) - Digital Realty Trust, L.P. $ in Millions, ¥ in Billions	12 Months Ended
	Dec. 31, 2019USD ($)item	Oct. 24, 2018JPY (¥)	Oct. 24, 2018USD ($)	Jan. 15, 2016USD ($)
Global revolving credit facilities, net
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 2,350	$ 2,000
Number of extension options | item	2
Debt instrument, extension term	6 months
Interest rate basis spread	90.00%
Commitment fee percentage	20.00%
Letters of credit issued	$ 45.2
Global revolving credit facilities, net | Accordian Feature
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,250
Yen Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		¥ 33.3	296.5
Interest rate basis spread	50.00%
Commitment fee percentage	10.00%
Yen Revolving Credit Facility | Accordian Feature
Debt Instrument [Line Items]
Maximum borrowing capacity		¥ 93.3	$ 831.1

Debt of the Operating Partner_6

Debt of the Operating Partnership (Unsecured Term Loans) (Narrative) (Details) - Digital Realty Trust, L.P. $ in Thousands	Oct. 24, 2018USD ($)	Dec. 31, 2019USD ($)item	Dec. 31, 2018USD ($)	Jan. 15, 2016USD ($)
Debt Instrument [Line Items]
Long-term debt, gross		$ 10,205,433
Unsecured term loans
Debt Instrument [Line Items]
Debt instrument, extension term		6 months
Long-term debt, gross		$ 813,205
2023 and 2024 Term Loan | Unsecured term loans
Debt Instrument [Line Items]
Interest rate basis spread		100.00%
Long-term debt, gross		$ 813,205	$ 808,120
Unsecured Term Loan, 5 Year
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 300,000
Debt instrument term	5 years
Unsecured Term Loan, 7 Year
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 512,000
Debt instrument term	5 years
Unsecured term loans
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 1,550,000
Number of extension options | item		2
Maximum borrowing capacity, subject to receipt of lender commitments and other conditions		$ 1,250,000
Interest rate basis spread		1.00%
Long-term debt, gross		$ 800,000

Debt of the Operating Partner_7

Debt of the Operating Partnership (Unsecured Senior Notes) (Details) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019GBP (£)	Dec. 31, 2019USD ($)	Dec. 31, 2019EUR (€)	Dec. 31, 2019GBP (£)	Dec. 31, 2019USD ($)	Mar. 05, 2019GBP (£)	Oct. 17, 2018GBP (£)
3.950% notes due 2022 | Digital Realty Trust, L.P. | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			3.95%	3.95%	3.95%
3.950% notes due 2022 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 500
Net proceeds from offering		$ 491.8
Stated interest rate			3.95%	3.95%	3.95%
3.625% notes due 2022 | Digital Realty Trust, L.P. | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			3.625%	3.625%	3.625%
3.625% notes due 2022 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 300
Net proceeds from offering		293.1
Stated interest rate			3.625%	3.625%	3.625%
2.750% notes due 2023 | Digital Realty Trust, L.P. | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			2.75%	2.75%	2.75%
2.750% notes due 2023 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 350
Net proceeds from offering		346.9
Stated interest rate			2.75%	2.75%	2.75%
4.750% notes due 2023 | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			4.75%	4.75%	4.75%
4.750% notes due 2023 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			4.75%	4.75%	4.75%
4.750% notes due 2023 | Digital Stout Holding, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount | £				£ 300
Net proceeds from offering | £	£ 490.9
2.625% notes due 2024 | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			2.625%	2.625%	2.625%
2.625% notes due 2024 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			2.625%	2.625%	2.625%
2.625% notes due 2024 | Digital Euro Finco, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount | €			€ 600
Net proceeds from offering | £	670.3
2.750% notes due 2024 | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			2.75%	2.75%	2.75%
2.750% notes due 2024 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			2.75%	2.75%	2.75%
2.750% notes due 2024 | Digital Stout Holding, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount | £				£ 250
Net proceeds from offering | £	321.3
4.250% notes due 2025 | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			4.25%	4.25%	4.25%
4.250% notes due 2025 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			4.25%	4.25%	4.25%
4.250% notes due 2025 | Digital Stout Holding, LLC | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			4.25%	4.25%	4.25%
4.250% notes due 2025 | Digital Stout Holding, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount | £				£ 400
Net proceeds from offering | £	624.2
2.500% notes due 2026 | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			2.50%	2.50%	2.50%
2.500% notes due 2026 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			2.50%	2.50%	2.50%
2.500% notes due 2026 | Digital Euro Finco, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 1,075
Net proceeds from offering		1,218.6
3.700% notes due 2027 | Digital Realty Trust, L.P. | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			3.70%	3.70%	3.70%
3.700% notes due 2027 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 1,000
Net proceeds from offering		991
Stated interest rate			3.70%	3.70%	3.70%
1.125% notes due 2028 | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			1.125%	1.125%	1.125%
1.125% notes due 2028 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			1.125%	1.125%	1.125%
1.125% notes due 2028 | Digital Euro Finco, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 500
Net proceeds from offering		539.7
4.450% notes due 2028 | Digital Realty Trust, L.P. | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			4.45%	4.45%	4.45%
4.450% notes due 2028 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 650
Net proceeds from offering		643.3
Stated interest rate			4.45%	4.45%	4.45%
3.300% notes due 2029 | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			3.30%	3.30%	3.30%
3.300% notes due 2029 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			3.30%	3.30%	3.30%
3.300% notes due 2029 | Digital Stout Holding, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount | £				£ 350
Net proceeds from offering | £	448.6
3.600% notes due 2029 | Digital Realty Trust, L.P. | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			3.60%	3.60%	3.60%
3.600% notes due 2029 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 900
Net proceeds from offering		890.6
Stated interest rate			3.60%	3.60%	3.60%
3.750% notes due 2030 | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			3.75%	3.75%	3.75%
3.750% notes due 2030 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			3.75%	3.75%	3.75%
3.750% notes due 2030 | Digital Stout Holding, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount | £				£ 550		£ 150	£ 400
Net proceeds from offering | £	£ 716.8
4.750% notes due 2025 | Digital Realty Trust, L.P. | Senior Notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			4.75%	4.75%	4.75%
4.750% notes due 2025 | Digital Realty Trust, L.P. | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Stated interest rate			4.75%	4.75%	4.75%
4.750% notes due 2025 | Digital Delta Holding, LLC | Unsecured senior notes
Debt of the Operating Partnership [Line Items]
Debt face amount					$ 450
Net proceeds from offering		$ 445.8
Stated interest rate			4.75%	4.75%	4.75%

Debt of the Operating Partner_8

Debt of the Operating Partnership (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Senior Notes | 2.500% notes due 2026
Debt Instrument [Line Items]
Stated interest rate	2.50%
Senior Notes | 3.600% notes due 2029 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	3.60%
Unsecured senior notes | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Leverage ratio	60.00%
Secured debt leverage ratio, maximum	40.00%
Interest coverage ratio	1.50
Total unencumbered assets	150.00%
Unsecured senior notes | 2.500% notes due 2026 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	2.50%
Unsecured senior notes | 2.500% notes due 2026 | Digital Euro Finco, LLC
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,075
Net proceeds from offering	$ 1,218.6
Unsecured senior notes | 5.875% notes due 2020 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	5.875%
Unsecured senior notes | 3.600% notes due 2029 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	3.60%
Aggregate principal amount	$ 900
Net proceeds from offering	$ 890.6
Unsecured senior notes | 3.400% notes due 2020 | Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Stated interest rate	3.40%

Debt of the Operating Partner_9

Debt of the Operating Partnership (Schedule of Debt Maturities And Principal Maturities) (Details) - Digital Realty Trust, L.P. $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)item	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
2020	$ 1,089
2021	800,000
2022	1,764,230
2023	1,150,656
Thereafter	6,489,458
Subtotal	10,205,433
Unamortized discounts, net of premiums	(22,554)
Unamortized premium	6,463
Long-term debt, net of discount (premium)	10,189,342
Global revolving credit facilities, net
Debt Instrument [Line Items]
2020	0
2020	0
2021	0
2022	99,315
2023	146,451
Thereafter	0
Subtotal	245,766	$ 1,663,156
Unamortized discounts, net of premiums	0
Unamortized premium	0
Long-term debt, net of discount (premium)	$ 245,766
Number of extension options | item	2
Debt instrument, extension term	6 months
Unsecured term loans
Debt Instrument [Line Items]
2020	$ 0
2020	0
2021	0
2022	813,205
2023	0
Thereafter	0
Subtotal	813,205
Unamortized discounts, net of premiums	0
Unamortized premium	0
Long-term debt, net of discount (premium)	$ 813,205
Debt instrument, extension term	6 months
Senior Notes
Debt Instrument [Line Items]
2020	$ 0
2020	0
2021	800,000
2022	747,710
2023	1,004,205
Thereafter	6,489,458
Subtotal	9,041,373
Unamortized discounts, net of premiums	(22,554)
Unamortized premium	6,409
Long-term debt, net of discount (premium)	9,025,228
Secured Debt.
Debt Instrument [Line Items]
2020	1,089
2020	0
2021	0
2022	104,000
2023	0
Thereafter	0
Subtotal	105,089
Unamortized discounts, net of premiums	0
Unamortized premium	54	148
Long-term debt, net of discount (premium)	$ 105,143	$ 705,924

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								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income per Share
Net income available to common stockholders	$ 315,577	$ 49,827	$ 31,738	$ 95,869	$ 31,230	$ 67,268	$ 65,134	$ 86,298	$ 493,011	$ 249,930	$ 173,148
Weighted average shares outstanding-basic (shares)									208,325,823	206,035,408	174,059,386
Potentially dilutive common shares:
Unvested incentive units (shares)									165,185	141,260	141,136
Forward equity offering (shares)									813,073	33,315	124,527
Market performance-based awards (shares)									158,166	463,488	570,049
Weighted average shares/units outstanding-diluted (shares/units)									209,462,247	206,673,471	174,895,098
Income per share:
Basic (in dollars per share)	$ 1.51	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.37	$ 1.21	$ 0.99
Diluted (in dollars per share)	$ 1.50	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.35	$ 1.21	$ 0.99

Income per Share (Schedule of A

Income per Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	19,466,156	20,028,886	13,559,863
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)	9,087,726	8,227,463	3,996,550
Series C Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	1,695,765	1,876,584	540,773
Series F Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	0	0	463,301
Potentially dilutive Series G Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	2,102,655	2,326,861	2,261,153
Potentially dilutive Series H Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	789,846	3,409,772	3,313,484
Potentially dilutive Series I Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	2,105,116	2,329,584	2,263,799
Series J Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	1,679,534	1,858,622	720,803
Potentially dilutive Series K Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	1,334,691	0	0
Series L Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (shares)	670,823	0	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								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Net income available to common unitholders	$ 315,577	$ 49,827	$ 31,738	$ 95,869	$ 31,230	$ 67,268	$ 65,134	$ 86,298	$ 493,011	$ 249,930	$ 173,148
Weighted average units outstanding-basic (units)									208,325,823	206,035,408	174,059,386
Potentially dilutive common units:
Unvested incentive units (units)									165,185	141,260	141,136
Forward equity offering (units)									813,073	33,315	124,527
Market performance-based awards (units)									158,166	463,488	570,049
Weighted average shares/units outstanding-diluted (shares/units)									209,462,247	206,673,471	174,895,098
Income per share:
Basic (in dollars per unit)	$ 1.51	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.37	$ 1.21	$ 0.99
Diluted (in dollars per unit)	$ 1.50	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.35	$ 1.21	$ 0.99
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Net income available to common unitholders	$ 328,677	$ 52,127	$ 33,138	$ 100,169	$ 32,530	$ 69,968	$ 67,834	$ 89,778	$ 514,111	$ 260,110	$ 176,918
Weighted average units outstanding-basic (units)									217,284,755	214,312,871	178,055,936
Potentially dilutive common units:
Unvested incentive units (units)									165,185	141,260	141,136
Forward equity offering (units)									813,073	33,315	124,527
Market performance-based awards (units)									158,166	463,488	570,049
Weighted average shares/units outstanding-diluted (shares/units)									218,421,179	214,950,934	178,891,648
Income per share:
Basic (in dollars per unit)	$ 1.51	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.37	$ 1.21	$ 0.99
Diluted (in dollars per unit)	$ 1.50	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.35	$ 1.21	$ 0.99

Income per Unit (Schedule of An

Income per Unit (Schedule of Antidilutive Securities Excluded from Computation of Earnings per Share) (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	19,466,156	20,028,886	13,559,863
Series F Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	0	0	463,301
Series L Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	670,823	0	0
Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	10,378,430	11,801,423	9,563,313
Digital Realty Trust, L.P. | Series C Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	1,695,765	1,876,584	540,773
Digital Realty Trust, L.P. | Series F Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	0	0	463,301
Digital Realty Trust, L.P. | Series G Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	2,102,655	2,326,861	2,261,153
Digital Realty Trust, L.P. | Series H Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	789,846	3,409,772	3,313,484
Digital Realty Trust, L.P. | Series I Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	2,105,116	2,329,584	2,263,799
Digital Realty Trust, L.P. | Potentially dilutive Series J Cumulative Redeemable Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	1,679,534	1,858,622	720,803
Digital Realty Trust, L.P. | Potentially dilutive Series K Cumulative Redeemable Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	1,334,691	0	0
Digital Realty Trust, L.P. | Series L Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (units)	670,823	0	0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Taxes
Percentage of income distributed (at least)		100.00%
Net deferred tax liability		$ 143,365	$ 146,552
Effective Income Tax Rate	21.00%
Gross deferred income tax assets:
Net operating loss carryforwards		63,280	71,656
Basis difference - real estate property		9,955	8,490
Basis difference - intangibles		1,071	256
Other - temporary differences		19,028	24,341
Total gross deferred income tax assets		93,334	104,743
Valuation allowance		(40,795)	(51,439)
Total deferred income tax assets, net of valuation allowance		52,539	53,304
Gross deferred income tax liabilities:
Basis difference - real estate property		162,095	164,077
Basis difference - equity investments		4,000
Basis difference - intangibles		1,547	6,855
Straight-line rent		8,044	5,340
Other - temporary differences		20,218	23,584
Total gross deferred income tax liabilities		195,904	199,856
Deferred Tax Liabilities, Net, Total		$ 143,365	$ 146,552

Equity and Accumulated Other _3

Equity and Accumulated Other Comprehensive Loss, Net (Equity Distribution Agreements Narrative) (Details) $ in Billions	Jan. 04, 2019USD ($)
2019 Equity Distribution Agreements
Class of Stock [Line Items]
Aggregate offering price of the distribution agreement maximum	$ 1

Equity and Accumulated Other _4

Equity and Accumulated Other Comprehensive Loss, Net (Forward Equity Sale) (Details) - Digital Realty Trust, L.P. - USD ($) $ in Billions	Sep. 27, 2019	Sep. 27, 2018
Forward Sale Agreement
Class of Stock [Line Items]
Common stock issued in public offering (shares)		9,775,000
Net proceeds on public offering	$ 1.1
Over-Allotment Option
Class of Stock [Line Items]
Common stock issued in public offering (shares)		1,275,000

Equity and Accumulated Other _5

Equity and Accumulated Other Comprehensive Loss, Net (Redeemable Preferred Stock) (Details) $ / shares in Units, $ in Thousands	Oct. 10, 2019shares	Mar. 13, 2019shares	Sep. 14, 2017$ / sharesshares	Aug. 07, 2017$ / sharesshares	Aug. 24, 2015$ / sharesshares	Mar. 26, 2014$ / sharesshares	Apr. 09, 2013$ / sharesshares	Dec. 31, 2019USD ($)item$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares	Apr. 01, 2019$ / shares	Apr. 15, 2017$ / shares
Class of Stock [Line Items]
Liquidation preference | $								$ 1,456,250
Preferred stock, issued (shares) | shares								58,250,000	50,650,000
Net proceeds from preferred stock | $								$ 1,434,420	$ 1,249,560
Number of quarters with no dividends triggering voting rights | item								6
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares								$ 25	$ 25
Preferred Stock, Redemption Price Per Share | $ / shares								$ 25
Series C Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares			0.6389035
Liquidation preference | $								$ 201,250
Preferred stock dividend per share amount (in dollars per share) | $ / shares			$ 1.65625					$ 1.65625
Preferred stock, issued (shares) | shares								8,050,000	8,050,000
Net proceeds from preferred stock | $								$ 219,250	$ 219,250
Dividend rate percentage			6.625%
Potentially dilutive Series G Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares							0.7532000
Liquidation preference | $								$ 250,000
Preferred stock dividend per share amount (in dollars per share) | $ / shares							$ 1.46875	$ 1.46875
Preferred stock, issued (shares) | shares								10,000,000	10,000,000
Net proceeds from preferred stock | $								$ 241,468	$ 241,468
Dividend rate percentage							5.875%
Potentially dilutive Series H Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares						0.9632000
Preferred stock dividend per share amount (in dollars per share) | $ / shares						$ 1.84375		$ 1.84375
Preferred stock, issued (shares) | shares									14,600,000
Net proceeds from preferred stock | $									$ 353,290
Dividend rate percentage						7.375%
Preferred Stock, Redemption Price Per Share | $ / shares										$ 25
Potentially dilutive Series I Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares					0.7623100
Liquidation preference | $								$ 250,000
Preferred stock dividend per share amount (in dollars per share) | $ / shares					$ 1.58750			$ 1.58750
Preferred stock, issued (shares) | shares								10,000,000	10,000,000
Net proceeds from preferred stock | $								$ 242,012	$ 242,012
Dividend rate percentage					6.35%
Series J Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares				0.4252100
Liquidation preference | $								$ 200,000
Preferred stock dividend per share amount (in dollars per share) | $ / shares				$ 1.31250				$ 1.31250
Preferred stock, issued (shares) | shares								8,000,000	8,000,000
Net proceeds from preferred stock | $								$ 193,540	$ 193,540
Dividend rate percentage				5.25%
Potentially dilutive Series K Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares		0.4361100
Liquidation preference | $								$ 210,000
Preferred stock dividend per share amount (in dollars per share) | $ / shares								$ 1.46250
Preferred stock, issued (shares) | shares								8,400,000
Net proceeds from preferred stock | $								$ 203,264
Dividend rate percentage		5.85%
Series L Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares	0.3851800
Liquidation preference | $								$ 345,000
Preferred stock dividend per share amount (in dollars per share) | $ / shares								$ 1.30000
Preferred stock, issued (shares) | shares								13,800,000
Net proceeds from preferred stock | $								$ 334,886
Dividend rate percentage	5.20%
Series F Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend per share amount (in dollars per share) | $ / shares								$ 1.65625
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares											$ 25
Preferred Stock, Redemption Price Per Share | $ / shares											$ 25.01840

Equity and Accumulated Other _6

Equity and Accumulated Other Comprehensive Loss, Net (Noncontrolling Interests in Operating Partnership) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Number of units (units)	208,900,758	206,425,656
Percentage of total	95.90%	95.10%
Common stock conversion ratio	1
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Common stock conversion ratio	1
Redeemable noncontrolling interests - operating partnership	$ 997.6	$ 1,076.9
Ascenty
Class of Stock [Line Items]
Issuance of units in connection with Ascenty Acquisition (units)	0	2,338,874
Percentage of total	0.00%	1.10%
Common units held by third parties
Class of Stock [Line Items]
Common units held by third parties (units)	6,820,201	6,297,272
Percentage of total	3.10%	2.90%
Incentive units held by employees and directors (see Note 14)
Class of Stock [Line Items]
Incentive units held by employees and directors (units)	2,022,954	1,944,738
Percentage of total	0.90%	0.90%
Noncontrolling Interests in Operating Partnership
Class of Stock [Line Items]
Number of units (units)	217,743,913	217,006,540
Percentage of total	100.00%	100.00%

Equity and Accumulated Other _7

Equity and Accumulated Other Comprehensive Loss, Net (Summary of Activity For Noncontrolling Interests in The Operating Partnership) (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common and Incentive Unit Activity [Roll Forward]
Beginning balance (units)	10,580,884	8,489,095	2,475,663
Issuance of common stock, net of offering costs (shares)		2,338,874	6,111,770
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (units)	(1,815,945)	(601,822)	(354,490)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (units)	(338,515)	(110,070)	(208,092)
Incentive units issued upon achievement of market performance condition (units)	319,279	357,956	390,795
Grant of incentive units to employees and directors (units)	120,368	128,986	73,449
Cancellation / forfeitures of incentive units held by employees and directors (units)	(22,916)	(22,135)
Ending balance (units)	8,843,155	10,580,884	8,489,095
Common Units
Common and Incentive Unit Activity [Roll Forward]
Beginning balance (units)	8,636,146	6,899,094	1,141,814
Issuance of common stock, net of offering costs (shares)		2,338,874	6,111,770
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (units)	(1,815,945)	(601,822)	(354,490)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (units)	0	0	0
Incentive units issued upon achievement of market performance condition (units)	0	0	0
Grant of incentive units to employees and directors (units)	0	0	0
Cancellation / forfeitures of incentive units held by employees and directors (units)	0	0
Ending balance (units)	6,820,201	8,636,146	6,899,094
Incentive Units
Common and Incentive Unit Activity [Roll Forward]
Beginning balance (units)	1,944,738	1,590,001	1,333,849
Issuance of common stock, net of offering costs (shares)		0	0
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (units)	0	0	0
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (units)	(338,515)	(110,070)	(208,092)
Incentive units issued upon achievement of market performance condition (units)	319,279	357,956	390,795
Grant of incentive units to employees and directors (units)	120,368	128,986	73,449
Cancellation / forfeitures of incentive units held by employees and directors (units)	(22,916)	(22,135)
Ending balance (units)	2,022,954	1,944,738	1,590,001

Equity and Accumulated Other _8

Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Dividends) (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 14, 2017	Aug. 07, 2017	Apr. 15, 2017	Aug. 24, 2015	Mar. 26, 2014	Apr. 09, 2013	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Apr. 01, 2019
Dividends Payable [Line Items]
Redemption price (in dollars per share)							$ 25
Preferred stock, liquidation preference per share/unit (in dollars per share)							25	$ 25
Series C Preferred Stock
Dividends Payable [Line Items]
Preferred stock dividend per share amount (in dollars per share)	$ 1.65625						$ 1.65625
Series C Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 13,332	$ 13,332	$ 3,963
Series C Preferred Stock | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,333
Series C Preferred Stock | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									0
Series C Preferred Stock | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									0
Series C Preferred Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,333		0
Series C Preferred Stock | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									3,963
Series C Preferred Stock | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,333
Series C Preferred Stock | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,333
Series C Preferred Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,333	3,333
Series C Preferred Stock | Installment 3 Year Four | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 3,333
Series C Preferred Stock | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,333
Series F Preferred Stock
Dividends Payable [Line Items]
Preferred stock dividend per share amount (in dollars per share)							$ 1.65625
Redemption price (in dollars per share)			$ 25.01840
Preferred stock, liquidation preference per share/unit (in dollars per share)			$ 25
Accrued and unpaid dividends up to but not including the redemption date			$ 100
Redemption premium			$ 6,300
Series F Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 0	0	3,023
Series F Preferred Stock | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							0
Series F Preferred Stock | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									3,023
Series F Preferred Stock | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									0
Series F Preferred Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							0		0
Series F Preferred Stock | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									0
Series F Preferred Stock | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								0
Series F Preferred Stock | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								0
Series F Preferred Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							0	0
Series F Preferred Stock | Installment 3 Year Four | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 0
Series F Preferred Stock | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								0
Potentially dilutive Series G Cumulative Redeemable Preferred Stock
Dividends Payable [Line Items]
Preferred stock dividend per share amount (in dollars per share)						$ 1.46875	$ 1.46875
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 14,688	14,688	14,688
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,672		3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,672	3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 3 Year Four | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 3,672
Potentially dilutive Series G Cumulative Redeemable Preferred Stock | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,672
Potentially dilutive Series H Cumulative Redeemable Preferred Stock
Dividends Payable [Line Items]
Preferred stock dividend per share amount (in dollars per share)					$ 1.84375		$ 1.84375
Redemption price (in dollars per share)										$ 25
Offering costs										$ 11,800
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 6,730	26,920	26,920
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 6,730
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									6,730
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									6,730
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									6,730
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									6,730
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								6,730
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								6,730
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								6,730
Potentially dilutive Series H Cumulative Redeemable Preferred Stock | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								6,730
Potentially dilutive Series I Cumulative Redeemable Preferred Stock
Dividends Payable [Line Items]
Preferred stock dividend per share amount (in dollars per share)				$ 1.58750			$ 1.58750
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 15,876	15,876	15,876
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,969		3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,969	3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 3 Year Four | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 3,969
Potentially dilutive Series I Cumulative Redeemable Preferred Stock | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								3,969
Series J Preferred Stock
Dividends Payable [Line Items]
Preferred stock dividend per share amount (in dollars per share)		$ 1.31250					$ 1.31250
Series J Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 10,500	10,500	4,200
Series J Preferred Stock | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							2,625
Series J Preferred Stock | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									0
Series J Preferred Stock | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									0
Series J Preferred Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							2,625		0
Series J Preferred Stock | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock									$ 4,200
Series J Preferred Stock | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								2,625
Series J Preferred Stock | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								2,625
Series J Preferred Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							2,625	2,625
Series J Preferred Stock | Installment 3 Year Four | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 2,625
Series J Preferred Stock | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock								$ 2,625
Potentially dilutive Series K Cumulative Redeemable Preferred Stock
Dividends Payable [Line Items]
Preferred stock dividend per share amount (in dollars per share)							$ 1.46250
Potentially dilutive Series K Cumulative Redeemable Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 9,828
Potentially dilutive Series K Cumulative Redeemable Preferred Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,686
Potentially dilutive Series K Cumulative Redeemable Preferred Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							3,071
Potentially dilutive Series K Cumulative Redeemable Preferred Stock | Installment 3 Year Four | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 3,071
Series L Preferred Stock
Dividends Payable [Line Items]
Preferred stock dividend per share amount (in dollars per share)							$ 1.30000
Series L Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 4,036
Series L Preferred Stock | Installment 3 Year Four | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, preferred stock							$ 4,036
Common Stock
Dividends Payable [Line Items]
Common stock dividend per share amount (in dollars per share)							$ 4.320	$ 4.040	$ 3.720
Common Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock							$ 900,373	$ 832,667	$ 681,280
Common Stock | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock							224,802
Common Stock | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock									148,358
Common Stock | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock									150,814
Common Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock							224,895		191,041
Common Stock | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock									$ 191,067
Common Stock | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock								208,015
Common Stock | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock								208,071
Common Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock							225,188	208,166
Common Stock | Installment 3 Year Four | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock							$ 225,488
Common Stock | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends, common stock								$ 208,415

Equity and Accumulated Other _9

Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Accumulated Other Comprehensive Loss, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 10,858,210	$ 11,049,450
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Ending balance	10,608,100	10,858,210
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(158,649)	(147,370)
Net current period change	22,015	(11,279)
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Reclassification to interest expense from interest rate swaps	0	0
Ending balance	(114,947)	(158,649)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	17,264	13,200
Net current period change	(8,839)	7,890
Reclassification to interest expense from interest rate swaps	(7,138)	(3,826)
Ending balance	1,287	17,264
Accumulated other comprehensive income (loss), net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(115,647)	(108,432)
Net current period change	13,176	(3,389)
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Reclassification to interest expense from interest rate swaps	(7,138)	(3,826)
Ending balance	(87,922)	(115,647)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	25,738	25,738
Net current period change	0	0
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	0
Reclassification to interest expense from interest rate swaps	0	0
Ending balance	$ 25,738	$ 25,738

Capital and Accumulated Other_3

Capital and Accumulated Other Comprehensive Income (Loss) (Forward Equity Sale) (Details) - Digital Realty Trust, L.P. - USD ($) $ in Billions	Sep. 27, 2019	Sep. 27, 2018
Forward Sale Agreement
Class of Stock [Line Items]
Common stock issued in public offering (shares)		9,775,000
Net proceeds on public offering	$ 1.1
Over-Allotment Option
Class of Stock [Line Items]
Common stock issued in public offering (shares)		1,275,000

Capital and Accumulated Other_4

Capital and Accumulated Other Comprehensive Income (Loss) (Redeemable Preferred Units) (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 10, 2019	Mar. 13, 2019	Sep. 14, 2017	Sep. 07, 2017	Aug. 07, 2017	Aug. 24, 2015	Mar. 26, 2014	Apr. 09, 2013	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019
Preferred Units [Line Items]
Liquidation preference									$ 1,456,250
Units outstanding (in units)									58,250,000	50,650,000
Balance (in thousands, net of issuance costs) as of December 31,									$ 1,434,420	$ 1,249,560
Preferred stock, liquidation preference per share/unit (in dollars per unit)									$ 25	$ 25
Preferred Stock, Redemption Price Per Share									$ 25
Series C Preferred Units
Preferred Units [Line Items]
Liquidation preference									$ 201,250
Preferred stock dividend per share amount (in dollars per share)			$ 1.65625
Units outstanding (in units)									8,050,000	8,050,000
Balance (in thousands, net of issuance costs) as of December 31,									$ 219,250	$ 219,250
Dividend rate percentage			6.625%
Series G Preferred Units
Preferred Units [Line Items]
Liquidation preference									$ 250,000
Preferred stock dividend per share amount (in dollars per share)								$ 1.46875
Units outstanding (in units)									10,000,000	10,000,000
Balance (in thousands, net of issuance costs) as of December 31,									$ 241,468	$ 241,468
Dividend rate percentage								5.875%
Series H Preferred Units
Preferred Units [Line Items]
Preferred stock dividend per share amount (in dollars per share)							$ 1.84375
Units outstanding (in units)										14,600,000
Balance (in thousands, net of issuance costs) as of December 31,										$ 353,290
Preferred stock, liquidation preference per share/unit (in dollars per unit)											$ 25
Dividend rate percentage							7.375%
Preferred Stock, Redemption Price Per Share											$ 25
Series I Preferred Units
Preferred Units [Line Items]
Liquidation preference									$ 250,000
Preferred stock dividend per share amount (in dollars per share)						$ 1.58750
Units outstanding (in units)									10,000,000	10,000,000
Balance (in thousands, net of issuance costs) as of December 31,									$ 242,012	$ 242,012
Dividend rate percentage					6.35%
Potentially dilutive Series J Cumulative Redeemable Preferred Units
Preferred Units [Line Items]
Liquidation preference									$ 200,000
Preferred stock dividend per share amount (in dollars per share)					$ 1.31250
Units outstanding (in units)									8,000,000	8,000,000
Balance (in thousands, net of issuance costs) as of December 31,									$ 193,540	$ 193,540
Dividend rate percentage				5.25%
Potentially dilutive Series K Cumulative Redeemable Preferred Units
Preferred Units [Line Items]
Liquidation preference									$ 210,000
Preferred stock dividend per share amount (in dollars per share)		$ 1.46250
Units outstanding (in units)									8,400,000
Balance (in thousands, net of issuance costs) as of December 31,									$ 203,264
Dividend rate percentage		5.85%
Series L Preferred Units
Preferred Units [Line Items]
Liquidation preference									$ 345,000
Preferred stock dividend per share amount (in dollars per share)	$ 1.30000								$ 1.30000
Units outstanding (in units)									13,800,000
Balance (in thousands, net of issuance costs) as of December 31,									$ 334,886
Dividend rate percentage	5.20%

Capital and Accumulated Other_5

Capital and Accumulated Other Comprehensive Income (Loss) (Partnership Units Narrative) (Details) $ in Millions	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Class of Stock [Line Items]
Common stock conversion ratio	1
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Common stock conversion ratio	1
Redeemable noncontrolling interests - operating partnership	$ 997.6	$ 1,076.9
Redeemable noncontrolling interests - operating partnership	$ 997.6	$ 1,076.9

Capital and Accumulated Other_6

Capital and Accumulated Other Comprehensive Income (Loss) (Schedule of Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands

Oct. 10, 2019

Apr. 01, 2019

Mar. 13, 2019

Sep. 14, 2017

Aug. 07, 2017

Apr. 05, 2017

Aug. 24, 2015

Mar. 26, 2014

Apr. 09, 2013

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Dividends Payable [Line Items]

Redemption price (in dollars per share)

$ 25

Preferred stock, liquidation preference per share/unit (in dollars per share)

$ 25

$ 25

Series C Preferred Units

Dividends Payable [Line Items]

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.65625

Series F Preferred Units

Dividends Payable [Line Items]

Redemption price (in dollars per share)

$ 25.01840

Preferred stock, liquidation preference per share/unit (in dollars per share)

$ 25

Accrued and unpaid dividends up to but not including the redemption date

$ 100

Redemption premium

$ 6,300

Series G Preferred Units

Dividends Payable [Line Items]

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.46875

Series H Preferred Units

Dividends Payable [Line Items]

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.84375

Redemption price (in dollars per share)

$ 25

Preferred stock, liquidation preference per share/unit (in dollars per share)

$ 25

Redemption premium

$ 11,800

Series I Preferred Units

Dividends Payable [Line Items]

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.58750

Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.31250

Potentially dilutive Series K Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.46250

Series L Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 4,036

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.30000

$ 1.30000

Installment 4 Year One | Series L Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 4,036

Digital Realty Trust, L.P. | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 13,332

$ 13,332

$ 3,963

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.65625

Digital Realty Trust, L.P. | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 0

0

3,023

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.65625

Digital Realty Trust, L.P. | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 14,688

14,688

14,688

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.46875

Digital Realty Trust, L.P. | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 6,730

26,920

26,920

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.84375

Digital Realty Trust, L.P. | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 15,876

15,876

15,876

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.58750

Digital Realty Trust, L.P. | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 10,500

10,500

4,200

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.31250

Digital Realty Trust, L.P. | Potentially dilutive Series K Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 9,828

Preferred stock dividend per share amount (in dollars per share/unit)

$ 1.46250

Digital Realty Trust, L.P. | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

$ 940,716

$ 867,405

$ 702,254

Common stock dividend per share amount (in dollars per share/unit)

$ 4.320

$ 4.040

$ 3.720

Digital Realty Trust, L.P. | Installment 1 Year One | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 3,333

Digital Realty Trust, L.P. | Installment 1 Year One | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 1 Year One | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 1 Year One | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 1 Year One | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 1 Year One | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

2,625

Digital Realty Trust, L.P. | Installment 1 Year One | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

235,256

Digital Realty Trust, L.P. | Installment 1 Year Three | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 0

Digital Realty Trust, L.P. | Installment 1 Year Three | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,023

Digital Realty Trust, L.P. | Installment 1 Year Three | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 1 Year Three | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 1 Year Three | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 1 Year Three | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 1 Year Three | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

150,968

Digital Realty Trust, L.P. | Installment 1 Year Two | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

$ 3,333

Digital Realty Trust, L.P. | Installment 1 Year Two | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 1 Year Two | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 1 Year Two | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 1 Year Two | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 1 Year Two | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

2,625

Digital Realty Trust, L.P. | Installment 1 Year Two | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

216,953

Digital Realty Trust, L.P. | Installment 2 Year One | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,333

Digital Realty Trust, L.P. | Installment 2 Year One | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 2 Year One | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 2 Year One | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 2 Year One | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

2,625

Digital Realty Trust, L.P. | Installment 2 Year One | Potentially dilutive Series K Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,686

Digital Realty Trust, L.P. | Installment 2 Year One | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

235,142

Digital Realty Trust, L.P. | Installment 2 Year Three | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 2 Year Three | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 2 Year Three | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 2 Year Three | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 2 Year Three | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 2 Year Three | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 2 Year Three | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

153,176

Digital Realty Trust, L.P. | Installment 2 Year Two | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,333

Digital Realty Trust, L.P. | Installment 2 Year Two | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 2 Year Two | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 2 Year Two | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 2 Year Two | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 2 Year Two | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

2,625

Digital Realty Trust, L.P. | Installment 2 Year Two | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

216,789

Digital Realty Trust, L.P. | Installment 3 Year One | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,333

Digital Realty Trust, L.P. | Installment 3 Year One | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 3 Year One | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 3 Year One | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 3 Year One | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

2,625

Digital Realty Trust, L.P. | Installment 3 Year One | Potentially dilutive Series K Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,071

Digital Realty Trust, L.P. | Installment 3 Year One | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

235,164

Digital Realty Trust, L.P. | Installment 3 Year Three | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 3 Year Three | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 3 Year Three | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 3 Year Three | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 3 Year Three | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 3 Year Three | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 3 Year Three | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

199,049

Digital Realty Trust, L.P. | Installment 3 Year Two | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,333

Digital Realty Trust, L.P. | Installment 3 Year Two | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 3 Year Two | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 3 Year Two | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 3 Year Two | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 3 Year Two | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

2,625

Digital Realty Trust, L.P. | Installment 3 Year Two | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

216,825

Digital Realty Trust, L.P. | Installment 4 Year One | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,333

Digital Realty Trust, L.P. | Installment 4 Year One | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 4 Year One | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 4 Year One | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 4 Year One | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

2,625

Digital Realty Trust, L.P. | Installment 4 Year One | Potentially dilutive Series K Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,071

Digital Realty Trust, L.P. | Installment 4 Year One | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

$ 235,154

Digital Realty Trust, L.P. | Installment 4 Year Three | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,963

Digital Realty Trust, L.P. | Installment 4 Year Three | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 4 Year Three | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 4 Year Three | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 4 Year Three | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 4 Year Three | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

4,200

Digital Realty Trust, L.P. | Installment 4 Year Three | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

$ 199,061

Digital Realty Trust, L.P. | Installment 4 Year Two | Series C Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,333

Digital Realty Trust, L.P. | Installment 4 Year Two | Series F Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

0

Digital Realty Trust, L.P. | Installment 4 Year Two | Series G Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,672

Digital Realty Trust, L.P. | Installment 4 Year Two | Series H Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

6,730

Digital Realty Trust, L.P. | Installment 4 Year Two | Series I Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

3,969

Digital Realty Trust, L.P. | Installment 4 Year Two | Potentially dilutive Series J Cumulative Redeemable Preferred Units

Dividends Payable [Line Items]

Dividends/Distributions, preferred units

2,625

Digital Realty Trust, L.P. | Installment 4 Year Two | Common Units

Dividends Payable [Line Items]

Dividends/Distributions, common stock/units

$ 216,838

Capital and Accumulated Other_7

Capital and Accumulated Other Comprehensive Income (Loss) (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	$ 21,687
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Net current period change	22,015	$ (11,279)
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Reclassification to interest expense from interest rate swaps	0	0
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Net current period change	(8,839)	7,890
Reclassification to interest expense from interest rate swaps	(7,138)	(3,826)
Accumulated other comprehensive income (loss), net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Net current period change	13,176	(3,389)
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Reclassification to interest expense from interest rate swaps	(7,138)	(3,826)
Digital Realty Trust, L.P.
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	10,858,210	11,049,450
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Ending balance	10,608,100	10,858,210
Digital Realty Trust, L.P. | Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(163,531)	(151,795)
Net current period change	23,975	(11,736)
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Reclassification to interest expense from interest rate swaps	0	0
Ending balance	(117,869)	(163,531)
Digital Realty Trust, L.P. | Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	16,986	12,758
Net current period change	(9,232)	8,197
Reclassification to interest expense from interest rate swaps	(7,446)	(3,969)
Ending balance	308	16,986
Digital Realty Trust, L.P. | Foreign currency net investment hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	26,152	26,152
Net current period change	0	0
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	0
Reclassification to interest expense from interest rate swaps	0	0
Ending balance	26,152	26,152
Digital Realty Trust, L.P. | Accumulated other comprehensive income (loss), net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(120,393)	(112,885)
Net current period change	14,743	(3,539)
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Reclassification to interest expense from interest rate swaps	(7,446)	(3,969)
Ending balance	$ (91,409)	$ (120,393)

Incentive Plan (Narrative) (Det

Incentive Plan (Narrative) (Details) shares in Millions	Sep. 22, 2017shares	Dec. 31, 2019shares
2004 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares registered for issuance (shares)	3.7
2014 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares remaining for issuance under Incentive Plan (shares)		6.6
Conversion of units to shares ratio		1

Incentive Plan (Schedule of Com

Incentive Plan (Schedule of Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Long-term incentive units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred compensation, expensed	$ 8.7	$ 6.8	$ 3.9
Deferred compensation, capitalized	0.2	0.2	1.7
Unearned Compensation	$ 15.4	$ 11.5
Expected period to recognize unearned compensation (in years)	2 years 2 months 12 days	2 years 2 months 12 days
Market performance-based awards
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred compensation, expensed	$ 13	$ 12.7	9.6
Deferred compensation, capitalized	0.8	0.8	2.3
Unearned Compensation	$ 28.4	$ 24.8
Expected period to recognize unearned compensation (in years)	2 years 6 months	2 years 6 months
Restricted stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred compensation, expensed	$ 11.5	$ 6.1	4.5
Deferred compensation, capitalized	2.8	4.2	$ 3.3
Unearned Compensation	$ 29.1	$ 23.6
Expected period to recognize unearned compensation (in years)	2 years 7 months 6 days	2 years 7 months 6 days

Incentive Plan (Summary of Long

Incentive Plan (Summary of Long-Term Incentive Units) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Units
Granted (shares)	120,368	128,986	73,449
Weighted-Average Grant Date Fair Value
Award vesting period	4 years
Long-term incentive units
Units
Unvested beginning of period (shares)	162,186
Granted (shares)	120,368
Vested (shares)	(55,039)
Cancelled or expired (shares)	(19,228)
Unvested end of period (shares)	208,287	162,186
Weighted-Average Grant Date Fair Value
Unvested, beginning of period (in dollars per share)	$ 100.59
Granted (in dollars per share)	116.22	$ 101.86	$ 109.71
Vested (in dollars per share)	100.33
Cancelled or expired (in dollars per share)	97.32
Unvested, end of period (in dollars per share)	$ 110	100.59
Long-term incentive units | Minimum
Weighted-Average Grant Date Fair Value
Award vesting period	2 years
Long-term incentive units | Maximum
Weighted-Average Grant Date Fair Value
Award vesting period	4 years
Market performance-based awards
Units
Vested (shares)	(696,379)
Weighted-Average Grant Date Fair Value
Granted (in dollars per share)	$ 114.97	$ 119.29	$ 111.06
Class D Units
Units
Vested (shares)	(2,509,963)

Incentive Plan (Market Performa

Incentive Plan (Market Performance Based Awards) (Details) $ in Millions

Feb. 27, 2023

Feb. 27, 2022

Feb. 27, 2021

Feb. 27, 2020

Dec. 31, 2019shares

Feb. 27, 2019

Feb. 27, 2018

Dec. 31, 2017shares

Jan. 31, 2020shares

Jan. 31, 2019shares

Jan. 31, 2018shares

Dec. 31, 2019USD ($)itemshares

Dec. 31, 2018USD ($)

Dec. 31, 2017USD ($)

2014 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance period

3 years

2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance period

3 years

Market performance-based awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance period

3 years

Vested (shares)

696,379

Number of trials | item

100,000

Fair value of awards | $

$ 22.3

$ 21.8

$ 19.5

Award requisite service period

4 years

Market performance-based awards | Below Threshold Level | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

0.00%

Performance Threshold

(300.00%)

Market performance-based awards | Threshold Level | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

25.00%

Market performance-based awards | Target Level | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Performance Threshold

100.00%

Market performance-based awards | High Level | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

100.00%

Performance Threshold

500.00%

Market performance-based awards | First Vesting Period in February | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Market performance-based awards | First Vesting Period in February | 2016 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

50.00%

Market performance-based awards | Second Vesting Period in February | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Class D Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

2,509,963

Class D Units | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

363,193

Class D Units | 2016 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

339,317

Distribution Equivalent Unit | High Level | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

36,246

Distribution Equivalent Unit | High Level | 2016 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

31,009

Distribution Equivalent Unit | High Level | 2017 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

10,971

Restricted Stock Units (RSUs) | 2015 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

49,707

Restricted Stock Units (RSUs) | 2016 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

56,778

Scenario, Forecast | Market performance-based awards | First Vesting Period in February | 2017 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Scenario, Forecast | Market performance-based awards | First Vesting Period in February | 2018 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Scenario, Forecast | Market performance-based awards | First Vesting Period in February | 2019 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Scenario, Forecast | Market performance-based awards | Second Vesting Period in February | 2017 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Scenario, Forecast | Market performance-based awards | Second Vesting Period in February | 2018 Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Scenario, Forecast | Market performance-based awards | Second Vesting Period in February | 2019 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

50.00%

Scenario, Forecast | Class D Units | 2017 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

137,816

Scenario, Forecast | Restricted Stock Units (RSUs) | High Level | 2017 Performance Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vested (shares)

29,141

Incentive Plan (Assumptions Use

Incentive Plan (Assumptions Used) (Details) - shares	Feb. 21, 2019	Jan. 01, 2019	Mar. 09, 2018	Mar. 01, 2018	Jan. 01, 2018	Feb. 28, 2017	Jan. 01, 2017	Dec. 31, 2019
Class D Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (shares)								2,509,963
Market performance-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Stock Price Volatility	23.00%	23.00%	22.00%	22.00%	22.00%	23.00%	25.00%
Risk-Free Interest rate	2.48%	2.44%	2.42%	2.34%	1.98%	1.43%	1.49%
Vested (shares)								696,379

Incentive Plan (Summary of Rest

Incentive Plan (Summary of Restricted Stock Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Units
Granted (shares)	120,368	128,986	73,449
Weighted-Average Grant Date Fair Value
Award vesting period	4 years
Restricted stock
Units
Unvested beginning of period (shares)	299,215
Granted (shares)	226,902
Vested (shares)	(111,950)
Cancelled or expired (shares)	(41,375)
Unvested end of period (shares)	372,792	299,215
Weighted-Average Grant Date Fair Value
Unvested, beginning of period (in dollars per share)	$ 97.55
Granted (in dollars per share)	115.25	$ 100.33	$ 108.65
Vested (in dollars per share)	93.38
Cancelled or expired (in dollars per share)	107.52
Unvested, end of period (in dollars per share)	$ 108.47	$ 97.55

Incentive Plan (401(k)) (Narrat

Incentive Plan (401(k)) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Incentive Plan
Vesting percentage of discretionary contributions	100.00%
Aggregate cost of contributions to the 401(k) Plan	$ 5.2	$ 4.8	$ 4.6

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) £ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)derivative	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2017GBP (£)instrument	Jul. 01, 2016instrument	Jun. 30, 2016USD ($)
Derivative [Line Items]
Gain (loss) to be reclassified within twelve months	$ 1,600,000
Notional Amount	479,825,000	$ 783,125,000
Excess proceeds from forward contract settlement	0	0	$ 63,956,000
Interest Rate Swap
Derivative [Line Items]
Impact from netting arrangements	$ 0
Derivatives in liability positions | derivative	0
Not Designated as Hedging Instrument | Foreign Exchange Forward
Derivative [Line Items]
Fair value of derivatives						$ 37,800,000
Designated as Hedging Instrument | Foreign Exchange Forward
Derivative [Line Items]
Number of forward contracts | instrument				4	4
Notional Amount | £				£ 357.3
Excess proceeds from forward contract settlement	$ 64,000,000
Amount of AOCI to remain in AOCI	26,200,000
Level 3 | Recurring basis
Derivative [Line Items]
Derivative Asset	$ 0	$ 0

Derivative Instruments (Outstan

Derivative Instruments (Outstanding Interest Rate Derivatives) (Details) $ in Thousands	Dec. 31, 2019USD ($)$ / $	Dec. 31, 2018USD ($)$ / $
Currently-paying contracts
Notional Amount	$ 479,825	$ 783,125
Level 2
Currently-paying contracts
Fair value of derivatives	$ 2,396	20,119
Interest Rate Swap, 1.611
Currently-paying contracts
Notional Amount		206,000
Strike Rate	1.611%
Interest Rate Swap, 1.611 | Level 2
Currently-paying contracts
Fair value of derivatives		1,976
Interest Rate Swap, 1.605
Currently-paying contracts
Notional Amount		54,905
Strike Rate	1.605%
Interest Rate Swap, 1.605 | Level 2
Currently-paying contracts
Fair value of derivatives		517
Interest Rate Swap 1.016
Currently-paying contracts
Notional Amount	$ 29,000	75,000
Strike Rate	1.016%
Interest Rate Swap 1.016 | Level 2
Currently-paying contracts
Fair value of derivatives	$ 175	2,169
Interest Rate Swap, 1.164
Currently-paying contracts
Notional Amount	$ 75,000	75,000
Strike Rate	1.164%
Interest Rate Swap, 1.164 | Level 2
Currently-paying contracts
Fair value of derivatives	$ 345	1,970
Interest Rate Swap, 1.435
Currently-paying contracts
Notional Amount	$ 300,000	300,000
Strike Rate	1.435%
Interest Rate Swap, 1.435 | Level 2
Currently-paying contracts
Fair value of derivatives	$ 945	11,463
Interest Rate Swap, 0.779
Currently-paying contracts
Notional Amount	$ 75,825	72,220
Strike Rate	0.779%
Interest Rate Swap, 0.779 | Level 2
Currently-paying contracts
Fair value of derivatives	$ 931	$ 2,024
Digital Realty Trust, L.P. | Canadian dollar (CAD)
Currently-paying contracts
Exchange rate | $ / $	0.77	0.73

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Estimated Fair Value And Carrying Amounts) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long-term debt	$ 10,861,382	$ 11,236,731
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long-term debt	$ 10,189,343	11,181,880
Senior Notes | 2.625% notes due 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	2.625%
Senior Notes | 2.750% notes due 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	2.75%
Senior Notes | 3.300% notes due 2029
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	3.30%
Level 2 | Global revolving credit facilities, net | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	$ 245,766	1,663,156
Level 2 | Global revolving credit facilities, net | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	245,766	1,663,156
Level 2 | Unsecured term loans | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	813,205	1,183,121
Level 2 | Unsecured term loans | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	813,205	1,183,121
Level 2 | Unsecured senior notes | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	9,697,166	7,684,368
Level 2 | Unsecured senior notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	9,025,229	7,629,679
Level 2 | Mortgage loans | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans	105,245	706,086
Level 2 | Mortgage loans | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans	$ 105,143	$ 705,924

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	Oct. 29, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Commitments and Contingencies.
Contract Termination Fee	$ 72,600
Contract Termination Fee, To Counter Party	$ 254,300
Rental property operating and maintenance		$ 1,020,578	$ 957,065	$ 759,616
Assumption of capital lease obligations upon acquisition			$ 75,030
Reimbursable amount of commitments related to construction contracts		25,400
Commitments related to construction contracts		$ 472,700

Quarterly Financial Informati_5

Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited) (Summary Of Selected Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information (unaudited)
Revenues	$ 787,463	$ 806,466	$ 800,797	$ 814,515	$ 778,267	$ 768,924	$ 754,919	$ 744,368	$ 3,209,241	$ 3,046,478	$ 2,457,928
Net income	349,326	67,574	61,324	120,997	52,597	90,264	88,159	110,095	599,221	341,115	256,267
Net income attributable to Digital Realty Trust, L.P.	336,284	66,497	60,168	116,812	51,559	87,597	85,463	106,627	579,761	331,246	248,259
Preferred stock dividends and issuance costs associated with redeemed preferred stock	(20,707)	(16,670)	(28,430)	(20,943)	(20,329)	(20,329)	(20,329)	(20,329)
Net income available to common stock/unitholders	$ 315,577	$ 49,827	$ 31,738	$ 95,869	$ 31,230	$ 67,268	$ 65,134	$ 86,298	$ 493,011	$ 249,930	$ 173,148
Basic (in dollars per share)	$ 1.51	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.37	$ 1.21	$ 0.99
Diluted (in dollars per share)	$ 1.50	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.35	$ 1.21	$ 0.99

Quarterly Financial Informati_6

Quarterly Financial Information (Digital Realty Trust, L.P.) (Summary Of Selected Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information [Line Items]
Revenues	$ 787,463	$ 806,466	$ 800,797	$ 814,515	$ 778,267	$ 768,924	$ 754,919	$ 744,368	$ 3,209,241	$ 3,046,478	$ 2,457,928
Net income	349,326	67,574	61,324	120,997	52,597	90,264	88,159	110,095	599,221	341,115	256,267
Net income attributable to Digital Realty Trust, L.P.	336,284	66,497	60,168	116,812	51,559	87,597	85,463	106,627	579,761	331,246	248,259
Preferred stock dividends and issuance costs associated with redeemed preferred stock	(20,707)	(16,670)	(28,430)	(20,943)	(20,329)	(20,329)	(20,329)	(20,329)
Net income available to common stock/unitholders	$ 315,577	$ 49,827	$ 31,738	$ 95,869	$ 31,230	$ 67,268	$ 65,134	$ 86,298	$ 493,011	$ 249,930	$ 173,148
Basic (in dollars per share/unit)	$ 1.51	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.37	$ 1.21	$ 0.99
Diluted (in dollars per share/unit)	$ 1.50	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.35	$ 1.21	$ 0.99
Digital Realty Trust, L.P.
Quarterly Financial Information [Line Items]
Revenues	$ 787,463	$ 806,466	$ 800,797	$ 814,515	$ 778,267	$ 768,924	$ 754,919	$ 744,368	$ 3,209,241	$ 3,046,478	$ 2,457,928
Net income	349,326	67,574	61,324	120,997	52,597	90,264	88,159	110,095	599,221	341,115	256,267
Net income attributable to Digital Realty Trust, L.P.	349,384	68,797	61,568	121,112	52,859	90,297	88,163	110,107	600,861	341,426	252,029
Preferred stock dividends and issuance costs associated with redeemed preferred stock	(20,707)	(16,670)	(28,430)	(20,943)	(20,329)	(20,329)	(20,329)	(20,329)
Net income available to common stock/unitholders	$ 328,677	$ 52,127	$ 33,138	$ 100,169	$ 32,530	$ 69,968	$ 67,834	$ 89,778	$ 514,111	$ 260,110	$ 176,918
Basic (in dollars per share/unit)	$ 1.51	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.37	$ 1.21	$ 0.99
Diluted (in dollars per share/unit)	$ 1.50	$ 0.24	$ 0.15	$ 0.46	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 2.35	$ 1.21	$ 0.99

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event € in Millions, $ in Millions	Feb. 25, 2020USD ($)	Jan. 17, 2020EUR (€)	Jan. 17, 2020USD ($)
Westin Building Exchange
Subsequent Event [Line Items]
Cash and equity consideration | $	$ 305
Ownership interest	49.00%
Increases our ownership interest	99.00%
Digital Dutch Finco B.V. | Senior Notes
Subsequent Event [Line Items]
Net proceeds on public offering		€ 1,678.6	$ 1,861.9
Digital Dutch Finco B.V. | 2022 Notes | Senior Notes
Subsequent Event [Line Items]
Debt face amount		€ 300
Stated interest rate		0.125%
Digital Dutch Finco B.V. | 2025 Notes | Senior Notes
Subsequent Event [Line Items]
Debt face amount		€ 650
Stated interest rate		0.625%
Digital Dutch Finco B.V. | 2030 Notes | Senior Notes
Subsequent Event [Line Items]
Debt face amount		€ 750
Stated interest rate		1.50%

Schedule III Properties And A_2

Schedule III Properties And Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 105,089
Land, Initial costs	930,961
Acquired ground lease, Initial costs	13,509
Buildings and improvements, Initial costs	8,327,303
Improvements, Costs capitalized subsequent to acquisition	7,620,170
Carry costs, Costs capitalized subsequent to acquisition	(5,351)
Land, Total costs	804,830
Acquired ground lease, Total costs	10,725
Buildings and improvements, Total costs	16,071,037
Total	16,886,592	$ 17,055,016	$ 16,915,936	$ 11,558,469
Accumulated depreciation and amortization	$ (4,536,169)	$ (3,935,267)	$ (3,238,227)	$ (2,668,509)
36 NE 2nd Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Miami
Encumbrances	$ 0
Land, Initial costs	1,942
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	24,184
Improvements, Costs capitalized subsequent to acquisition	28,557
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,943
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	52,740
Total	54,683
Accumulated depreciation and amortization	$ (20,112)
2323 Bryan Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	1,838
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	77,604
Improvements, Costs capitalized subsequent to acquisition	51,961
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,672
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	129,731
Total	131,403
Accumulated depreciation and amortization	$ (77,314)
300 Boulevard East
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	5,140
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	48,526
Improvements, Costs capitalized subsequent to acquisition	56,701
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,140
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	105,227
Total	110,367
Accumulated depreciation and amortization	$ (70,773)
2334 Lundy Place
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	3,607
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	23,008
Improvements, Costs capitalized subsequent to acquisition	63
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,607
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	23,071
Total	26,678
Accumulated depreciation and amortization	$ (11,349)
2440 Marsh Lane
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	1,477
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	10,330
Improvements, Costs capitalized subsequent to acquisition	74,858
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,486
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	85,179
Total	86,665
Accumulated depreciation and amortization	$ (70,641)
4849 Alpha Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	2,983
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	10,650
Improvements, Costs capitalized subsequent to acquisition	44,117
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,983
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	54,767
Total	57,750
Accumulated depreciation and amortization	$ (37,360)
600 West Seventh Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Los Angeles
Encumbrances	$ 0
Land, Initial costs	18,478
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	50,824
Improvements, Costs capitalized subsequent to acquisition	78,054
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	18,537
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	128,819
Total	147,356
Accumulated depreciation and amortization	$ (73,549)
2045 & 2055 Lafayette Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	6,065
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	43,817
Improvements, Costs capitalized subsequent to acquisition	45
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,065
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	43,862
Total	49,927
Accumulated depreciation and amortization	$ (20,264)
11830 Webb Chapel Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	5,881
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	34,473
Improvements, Costs capitalized subsequent to acquisition	2,534
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,881
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	37,007
Total	42,888
Accumulated depreciation and amortization	$ (18,292)
150 South First Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	2,068
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	29,214
Improvements, Costs capitalized subsequent to acquisition	1,499
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,068
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	30,713
Total	32,781
Accumulated depreciation and amortization	$ (14,486)
200 Paul Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	San Francisco
Encumbrances	$ 0
Land, Initial costs	14,427
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	75,777
Improvements, Costs capitalized subsequent to acquisition	122,607
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	13,162
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	199,649
Total	212,811
Accumulated depreciation and amortization	$ (95,975)
1100 Space Park Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	5,130
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	18,206
Improvements, Costs capitalized subsequent to acquisition	43,521
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,130
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	61,727
Total	66,857
Accumulated depreciation and amortization	$ (36,889)
3015 Winona Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Los Angeles
Encumbrances	$ 0
Land, Initial costs	6,534
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	8,356
Improvements, Costs capitalized subsequent to acquisition	6
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,534
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	8,362
Total	14,896
Accumulated depreciation and amortization	$ (4,007)
350 East Cermak Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	8,466
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	103,232
Improvements, Costs capitalized subsequent to acquisition	248,477
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	8,620
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	351,555
Total	360,175
Accumulated depreciation and amortization	$ (238,555)
2401 Walsh Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	5,775
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	19,267
Improvements, Costs capitalized subsequent to acquisition	115
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,775
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	19,382
Total	25,157
Accumulated depreciation and amortization	$ (9,323)
2403 Walsh Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	5,514
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	11,695
Improvements, Costs capitalized subsequent to acquisition	124
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,514
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	11,819
Total	17,333
Accumulated depreciation and amortization	$ (5,944)
200 North Nash Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Los Angeles
Encumbrances	$ 0
Land, Initial costs	4,562
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	12,503
Improvements, Costs capitalized subsequent to acquisition	344
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,562
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	12,847
Total	17,409
Accumulated depreciation and amortization	$ (7,010)
731 East Trade Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Charlotte
Encumbrances	$ 1,089
Land, Initial costs	1,748
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	5,727
Improvements, Costs capitalized subsequent to acquisition	267
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,748
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	5,994
Total	7,742
Accumulated depreciation and amortization	(2,782)
Unamortized premium	$ 54
113 North Myers
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Charlotte
Encumbrances	$ 0
Land, Initial costs	1,098
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,127
Improvements, Costs capitalized subsequent to acquisition	5,007
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,098
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	8,134
Total	9,232
Accumulated depreciation and amortization	$ (2,942)
125 North Myers
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Charlotte
Encumbrances	$ 0
Land, Initial costs	1,271
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,738
Improvements, Costs capitalized subsequent to acquisition	6,378
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,271
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	10,116
Total	11,387
Accumulated depreciation and amortization	$ (7,820)
Paul van Vlissingenstraat 16
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	15,255
Improvements, Costs capitalized subsequent to acquisition	26,000
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	41,255
Total	41,255
Accumulated depreciation and amortization	$ (22,108)
600-780 S. Federal
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	7,849
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	27,881
Improvements, Costs capitalized subsequent to acquisition	44,112
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,304
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	72,538
Total	79,842
Accumulated depreciation and amortization	$ (20,834)
Chemin de l'Epinglier 2
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Geneva
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	20,071
Improvements, Costs capitalized subsequent to acquisition	(990)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	19,081
Total	19,081
Accumulated depreciation and amortization	$ (8,548)
7500 Metro Center Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Austin
Encumbrances	$ 0
Land, Initial costs	1,177
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	4,877
Improvements, Costs capitalized subsequent to acquisition	71,399
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,177
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	76,276
Total	77,453
Accumulated depreciation and amortization	$ (16,572)
3 Corporate Place
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	1,543
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	12,678
Improvements, Costs capitalized subsequent to acquisition	92,737
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,543
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	105,415
Total	106,958
Accumulated depreciation and amortization	$ (87,175)
1115 Centennial Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	581
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	58,202
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	581
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	58,202
Total	58,783
Accumulated depreciation and amortization	$ (2,518)
4025 Midway Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	2,196
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	14,037
Improvements, Costs capitalized subsequent to acquisition	30,398
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,017
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	44,614
Total	46,631
Accumulated depreciation and amortization	$ (32,501)
Clonshaugh Industrial Estate
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dublin
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	1,444
Buildings and improvements, Initial costs	5,569
Improvements, Costs capitalized subsequent to acquisition	1,493
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	93
Buildings and improvements, Total costs	8,413
Total	8,506
Accumulated depreciation and amortization	$ (5,526)
Digital Houston
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Houston
Encumbrances	$ 0
Land, Initial costs	6,965
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	23,492
Improvements, Costs capitalized subsequent to acquisition	148,349
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,594
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	172,212
Total	178,806
Accumulated depreciation and amortization	$ (80,689)
120 E Van Buren
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Phoenix
Encumbrances	$ 0
Land, Initial costs	4,524
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	157,822
Improvements, Costs capitalized subsequent to acquisition	121,422
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,524
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	279,244
Total	283,768
Accumulated depreciation and amortization	$ (148,484)
Gyroscoopweg 2E-2F
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	13,450
Improvements, Costs capitalized subsequent to acquisition	(1,643)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	11,807
Total	11,807
Accumulated depreciation and amortization	$ (5,260)
Clonshaugh Industrial Estate II
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dublin
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	77,840
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	77,840
Total	77,840
Accumulated depreciation and amortization	$ (50,061)
600 Winter Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Boston
Encumbrances	$ 0
Land, Initial costs	1,429
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	6,228
Improvements, Costs capitalized subsequent to acquisition	456
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,429
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	6,684
Total	8,113
Accumulated depreciation and amortization	$ (2,757)
2300 NW 89th Place
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Miami
Encumbrances	$ 0
Land, Initial costs	1,022
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,767
Improvements, Costs capitalized subsequent to acquisition	19
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,022
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	3,786
Total	4,808
Accumulated depreciation and amortization	$ (1,800)
Unit 9, Blanchardstown Corporate Park
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dublin
Encumbrances	$ 0
Land, Initial costs	1,927
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	40,024
Improvements, Costs capitalized subsequent to acquisition	23,867
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,623
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	64,195
Total	65,818
Accumulated depreciation and amortization	$ (28,897)
111 8th Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	17,688
Improvements, Costs capitalized subsequent to acquisition	29,149
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	46,837
Total	46,837
Accumulated depreciation and amortization	$ (33,612)
8100 Boone Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	158
Improvements, Costs capitalized subsequent to acquisition	2,034
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,192
Total	2,192
Accumulated depreciation and amortization	$ (2,192)
3011 Lafayette Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	3,354
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	10,305
Improvements, Costs capitalized subsequent to acquisition	53,352
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,354
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	63,657
Total	67,011
Accumulated depreciation and amortization	$ (52,456)
44470 Chilum Place
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	3,531
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	37,360
Improvements, Costs capitalized subsequent to acquisition	1
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,531
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	37,361
Total	40,892
Accumulated depreciation and amortization	$ (13,154)
43881 Devin Shafron Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	4,653
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	23,631
Improvements, Costs capitalized subsequent to acquisition	97,322
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,653
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	120,953
Total	125,606
Accumulated depreciation and amortization	$ (98,771)
43831 Devin Shafron Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	3,027
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	16,247
Improvements, Costs capitalized subsequent to acquisition	1,441
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,027
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	17,688
Total	20,715
Accumulated depreciation and amortization	$ (7,156)
43791 Devin Shafron Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	3,490
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	17,444
Improvements, Costs capitalized subsequent to acquisition	78,515
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,490
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	95,959
Total	99,449
Accumulated depreciation and amortization	$ (66,593)
Mundells Roundabout
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	31,354
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	44,158
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	21,131
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	54,381
Total	75,512
Accumulated depreciation and amortization	$ (15,485)
1500 Space Park Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	6,732
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	6,325
Improvements, Costs capitalized subsequent to acquisition	46,593
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,106
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	55,544
Total	59,650
Accumulated depreciation and amortization	$ (53,696)
Cressex 1
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	3,629
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	9,036
Improvements, Costs capitalized subsequent to acquisition	21,335
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,548
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	31,452
Total	34,000
Accumulated depreciation and amortization	$ (22,054)
Naritaweg 52
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	1,192
Buildings and improvements, Initial costs	23,441
Improvements, Costs capitalized subsequent to acquisition	(5,561)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	917
Buildings and improvements, Total costs	18,155
Total	19,072
Accumulated depreciation and amortization	$ (6,396)
1 St. Anne's Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	1,490
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	1,045
Improvements, Costs capitalized subsequent to acquisition	(736)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,014
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	785
Total	1,799
Accumulated depreciation and amortization	$ (238)
2 St. Anne's Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	922
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	695
Improvements, Costs capitalized subsequent to acquisition	34,379
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	676
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	35,320
Total	35,996
Accumulated depreciation and amortization	$ (7,647)
3 St. Anne's Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	22,079
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	16,351
Improvements, Costs capitalized subsequent to acquisition	81,570
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	14,901
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	105,099
Total	120,000
Accumulated depreciation and amortization	$ (70,353)
365 South Randolphville Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	3,019
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	17,404
Improvements, Costs capitalized subsequent to acquisition	296,533
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,853
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	314,103
Total	316,956
Accumulated depreciation and amortization	$ (155,008)
701 & 717 Leonard Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	2,165
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	9,934
Improvements, Costs capitalized subsequent to acquisition	969
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,165
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	10,903
Total	13,068
Accumulated depreciation and amortization	$ (3,608)
Manchester Technopark
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Manchester
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	23,918
Improvements, Costs capitalized subsequent to acquisition	(7,539)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	16,379
Total	16,379
Accumulated depreciation and amortization	$ (5,427)
1201 Comstock Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	2,093
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	1,606
Improvements, Costs capitalized subsequent to acquisition	27,687
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,398
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	27,988
Total	31,386
Accumulated depreciation and amortization	$ (20,843)
1550 Space Park Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	0
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	0
Accumulated depreciation and amortization	$ 0
1525 Comstock Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	2,293
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	16,216
Improvements, Costs capitalized subsequent to acquisition	32,286
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,061
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	48,734
Total	50,795
Accumulated depreciation and amortization	$ (36,862)
43830 Devin Shafron Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	5,509
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	74,322
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,928
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	74,903
Total	79,831
Accumulated depreciation and amortization	$ (50,129)
1232 Alma Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	2,267
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,740
Improvements, Costs capitalized subsequent to acquisition	66,014
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,266
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	69,755
Total	72,021
Accumulated depreciation and amortization	$ (49,754)
900 Quality Way
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	1,446
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	1,659
Improvements, Costs capitalized subsequent to acquisition	69,987
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,437
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	71,655
Total	73,092
Accumulated depreciation and amortization	$ (25,389)
1210 Integrity Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	2,041
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,389
Improvements, Costs capitalized subsequent to acquisition	187,448
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,204
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	189,674
Total	192,878
Accumulated depreciation and amortization	$ (13,445)
907 Security Row
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	333
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	344
Improvements, Costs capitalized subsequent to acquisition	97,851
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,112
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	96,416
Total	98,528
Accumulated depreciation and amortization	$ (12,469)
908 Quality Way
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	6,730
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	4,493
Improvements, Costs capitalized subsequent to acquisition	13,954
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,067
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	23,110
Total	25,177
Accumulated depreciation and amortization	$ (18,696)
904 Quality Way
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	760
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	744
Improvements, Costs capitalized subsequent to acquisition	6,812
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,151
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	7,165
Total	8,316
Accumulated depreciation and amortization	$ (1,382)
1215 Integrity Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	69,926
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	995
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	68,931
Total	69,926
Accumulated depreciation and amortization	$ (23,033)
1350 Duane & 3080 Raymond
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	7,081
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	69,817
Improvements, Costs capitalized subsequent to acquisition	354
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,081
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	70,171
Total	77,252
Accumulated depreciation and amortization	$ (18,445)
60 & 80 Merritt
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	3,418
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	71,477
Improvements, Costs capitalized subsequent to acquisition	94,485
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,148
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	166,232
Total	169,380
Accumulated depreciation and amortization	$ (49,071)
55 Middlesex
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Boston
Encumbrances	$ 0
Land, Initial costs	9,975
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	68,363
Improvements, Costs capitalized subsequent to acquisition	14,499
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	9,975
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	82,862
Total	92,837
Accumulated depreciation and amortization	$ (29,930)
128 First Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Boston
Encumbrances	$ 0
Land, Initial costs	5,465
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	185,348
Improvements, Costs capitalized subsequent to acquisition	39,134
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,465
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	224,482
Total	229,947
Accumulated depreciation and amortization	$ (80,988)
Cateringweg 5
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	3,518
Buildings and improvements, Initial costs	3,517
Improvements, Costs capitalized subsequent to acquisition	37,814
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	3,223
Buildings and improvements, Total costs	41,626
Total	44,849
Accumulated depreciation and amortization	$ (9,429)
1725 Comstock Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	3,274
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	6,567
Improvements, Costs capitalized subsequent to acquisition	39,308
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,274
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	45,875
Total	49,149
Accumulated depreciation and amortization	$ (29,302)
3105 Alfred Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	6,533
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,725
Improvements, Costs capitalized subsequent to acquisition	123,691
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,533
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	127,416
Total	133,949
Accumulated depreciation and amortization	$ (38,853)
365 Main Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	San Francisco
Encumbrances	$ 0
Land, Initial costs	22,854
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	158,709
Improvements, Costs capitalized subsequent to acquisition	35,001
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	22,854
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	193,710
Total	216,564
Accumulated depreciation and amortization	$ (60,449)
720 2nd Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	San Francisco
Encumbrances	$ 0
Land, Initial costs	3,884
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	116,861
Improvements, Costs capitalized subsequent to acquisition	13,601
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,884
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	130,462
Total	134,346
Accumulated depreciation and amortization	$ (36,724)
2260 East El Segundo
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Los Angeles
Encumbrances	$ 0
Land, Initial costs	11,053
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	51,397
Improvements, Costs capitalized subsequent to acquisition	17,433
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	11,053
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	68,830
Total	79,883
Accumulated depreciation and amortization	$ (23,640)
2121 South Price Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Phoenix
Encumbrances	$ 0
Land, Initial costs	7,335
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	238,452
Improvements, Costs capitalized subsequent to acquisition	215,183
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,835
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	456,135
Total	460,970
Accumulated depreciation and amortization	$ (147,927)
4030 Lafayette
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	2,492
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	16,912
Improvements, Costs capitalized subsequent to acquisition	12,780
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,492
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	29,692
Total	32,184
Accumulated depreciation and amortization	$ (9,100)
4040 Lafayette
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	1,246
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	4,267
Improvements, Costs capitalized subsequent to acquisition	24,887
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,246
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	29,154
Total	30,400
Accumulated depreciation and amortization	$ (5,804)
4050 Lafayette
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	1,246
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	4,371
Improvements, Costs capitalized subsequent to acquisition	36,244
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,246
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	40,615
Total	41,861
Accumulated depreciation and amortization	$ (26,913)
2805 Lafayette Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	8,976
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	18,155
Improvements, Costs capitalized subsequent to acquisition	131,011
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	8,294
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	149,848
Total	158,142
Accumulated depreciation and amortization	$ (38,954)
29A International Business Park
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Singapore
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	137,545
Improvements, Costs capitalized subsequent to acquisition	223,342
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	360,887
Total	360,887
Accumulated depreciation and amortization	$ (152,206)
43940 Digital Loudoun Plaza
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	6,229
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	285,614
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,524
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	284,319
Total	291,843
Accumulated depreciation and amortization	$ (90,924)
44060 Digital Loudoun Plaza
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	3,700
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	187,004
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,441
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	187,263
Total	190,704
Accumulated depreciation and amortization	$ (31,598)
44100 Digital Loudoun Plaza
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	3,700
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	141,840
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,493
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	142,047
Total	145,540
Accumulated depreciation and amortization	$ (17,596)
43780 Digital Loudoun Plaza
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	3,671
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	123,368
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,186
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	122,853
Total	127,039
Accumulated depreciation and amortization	$ (12,532)
1-11 Templar Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Sydney
Encumbrances	$ 0
Land, Initial costs	6,937
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	62,836
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,349
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	65,424
Total	69,773
Accumulated depreciation and amortization	$ (19,316)
13-23 Templar Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Sydney
Encumbrances	$ 0
Land, Initial costs	4,236
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	52,379
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,501
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	54,114
Total	56,615
Accumulated depreciation and amortization	$ (1,034)
Fountain Court
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	7,544
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	12,506
Improvements, Costs capitalized subsequent to acquisition	100,446
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,569
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	113,927
Total	120,496
Accumulated depreciation and amortization	$ (30,892)
72 Radnor Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Melbourne
Encumbrances	$ 0
Land, Initial costs	2,568
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	66,029
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,737
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	66,860
Total	68,597
Accumulated depreciation and amortization	$ (12,370)
98 Radnor Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Melbourne
Encumbrances	$ 0
Land, Initial costs	1,899
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	36,140
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,339
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	36,700
Total	38,039
Accumulated depreciation and amortization	$ (17,738)
105 Cabot Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Boston
Encumbrances	$ 0
Land, Initial costs	2,386
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	35,876
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,161
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	37,101
Total	38,262
Accumulated depreciation and amortization	$ (11,061)
3825 NW Aloclek Place
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Portland
Encumbrances	$ 0
Land, Initial costs	1,689
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	58,230
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,689
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	58,230
Total	59,919
Accumulated depreciation and amortization	$ (24,836)
Profile Park
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dublin
Encumbrances	$ 0
Land, Initial costs	6,288
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	56,087
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,050
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	60,325
Total	62,375
Accumulated depreciation and amortization	$ (6,256)
760 Doug Davis Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Atlanta
Encumbrances	$ 0
Land, Initial costs	4,837
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	53,551
Improvements, Costs capitalized subsequent to acquisition	3,373
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,837
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	56,924
Total	61,761
Accumulated depreciation and amortization	$ (15,131)
2501 S. State Hwy 121
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	23,137
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	93,943
Improvements, Costs capitalized subsequent to acquisition	11,954
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	16,242
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	112,792
Total	129,034
Accumulated depreciation and amortization	$ (35,468)
9333 Grand Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	5,686
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	14,515
Improvements, Costs capitalized subsequent to acquisition	75,076
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,205
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	94,072
Total	95,277
Accumulated depreciation and amortization	$ (40,321)
9355 Grand Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	228,171
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,518
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	225,653
Total	228,171
Accumulated depreciation and amortization	$ (30,014)
9377 Grand Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	133,910
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,799
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	131,111
Total	133,910
Accumulated depreciation and amortization	$ (6,039)
850 E Collins
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	1,614
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	86,565
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,614
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	86,565
Total	88,179
Accumulated depreciation and amortization	$ (23,682)
950 E Collins
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	1,546
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	75,695
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,546
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	75,695
Total	77,241
Accumulated depreciation and amortization	$ (15,163)
400 S. Akard
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	10,075
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	62,730
Improvements, Costs capitalized subsequent to acquisition	2,943
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	10,075
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	65,673
Total	75,748
Accumulated depreciation and amortization	$ (13,571)
410 Commerce Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	30,260
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	30,260
Total	30,260
Accumulated depreciation and amortization	$ (15,310)
Croydon
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	1,683
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	104,728
Improvements, Costs capitalized subsequent to acquisition	47,591
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,367
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	151,635
Total	154,002
Accumulated depreciation and amortization	$ (31,430)
Watford
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	7,355
Buildings and improvements, Initial costs	219,273
Improvements, Costs capitalized subsequent to acquisition	5,018
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	6,492
Buildings and improvements, Total costs	225,154
Total	231,646
Accumulated depreciation and amortization	$ (48,278)
Unit 21 Goldsworth Park
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	17,334
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	928,129
Improvements, Costs capitalized subsequent to acquisition	(121,080)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	13,237
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	811,146
Total	824,383
Accumulated depreciation and amortization	$ (182,102)
23 Waterloo Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Sydney
Encumbrances	$ 0
Land, Initial costs	7,112
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,868
Improvements, Costs capitalized subsequent to acquisition	(3,564)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,804
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,612
Total	7,416
Accumulated depreciation and amortization	$ (500)
1 Rue Jean-Pierre
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Paris
Encumbrances	$ 0
Land, Initial costs	9,621
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	35,825
Improvements, Costs capitalized subsequent to acquisition	(6,820)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	8,177
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	30,449
Total	38,626
Accumulated depreciation and amortization	$ (7,732)
Liet-dit le Christ de Saclay
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Paris
Encumbrances	$ 0
Land, Initial costs	3,402
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,090
Improvements, Costs capitalized subsequent to acquisition	(975)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,891
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,626
Total	5,517
Accumulated depreciation and amortization	$ (861)
127 Rue de Paris
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Paris
Encumbrances	$ 0
Land, Initial costs	8,637
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	10,838
Improvements, Costs capitalized subsequent to acquisition	(2,923)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,341
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	9,211
Total	16,552
Accumulated depreciation and amortization	$ (2,910)
1900 S. Price Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Phoenix
Encumbrances	$ 0
Land, Initial costs	5,380
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	16,975
Improvements, Costs capitalized subsequent to acquisition	(11,394)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,423
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	8,538
Total	10,961
Accumulated depreciation and amortization	$ (2,412)
371 Gough Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Toronto
Encumbrances	$ 0
Land, Initial costs	7,394
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	677
Improvements, Costs capitalized subsequent to acquisition	93,801
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,838
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	96,034
Total	101,872
Accumulated depreciation and amortization	$ (13,452)
1500 Towerview Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Minneapolis
Encumbrances	$ 0
Land, Initial costs	10,190
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	20,054
Improvements, Costs capitalized subsequent to acquisition	3,191
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	10,190
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	23,245
Total	33,435
Accumulated depreciation and amortization	$ (5,566)
Principal Park
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	11,837
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	76,060
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,097
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	80,800
Total	87,897
Accumulated depreciation and amortization	$ (13,080)
Liverpoolweg 10
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	733
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,122
Improvements, Costs capitalized subsequent to acquisition	9,429
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	630
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	12,654
Total	13,284
Accumulated depreciation and amortization	$ (3,020)
DePresident
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	6,737
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	116,399
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,996
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	116,140
Total	123,136
Accumulated depreciation and amortization	$ (5,534)
Crawley 2
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	24,305
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	33,139
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,252
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	53,192
Total	57,444
Accumulated depreciation and amortization	$ (2,048)
3 Loyang Way
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Singapore
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	180,615
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	180,615
Total	180,615
Accumulated depreciation and amortization	$ (11,645)
Digital Loudoun III
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	43,000
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	800,087
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	47,399
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	795,688
Total	843,087
Accumulated depreciation and amortization	$ (37,172)
Digital Frankfurt
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Frankfurt
Encumbrances	$ 0
Land, Initial costs	5,543
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	137,399
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,111
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	138,831
Total	142,942
Accumulated depreciation and amortization	$ (3,706)
56 Marietta Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Atlanta
Encumbrances	$ 0
Land, Initial costs	1,700
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	211,397
Improvements, Costs capitalized subsequent to acquisition	28,272
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,715
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	239,654
Total	241,369
Accumulated depreciation and amortization	$ (42,690)
2 Peekay Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	115,439
Improvements, Costs capitalized subsequent to acquisition	(16,103)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	99,336
Total	99,336
Accumulated depreciation and amortization	$ (23,282)
100 Delawanna Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	3,600
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	85,438
Improvements, Costs capitalized subsequent to acquisition	11,712
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,600
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	97,150
Total	100,750
Accumulated depreciation and amortization	$ (14,734)
60 Hudson Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	32,280
Improvements, Costs capitalized subsequent to acquisition	18,735
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	51,015
Total	51,015
Accumulated depreciation and amortization	$ (17,575)
32 Avenue of the Americas
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	30,980
Improvements, Costs capitalized subsequent to acquisition	4,362
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	35,342
Total	35,342
Accumulated depreciation and amortization	$ (12,081)
3433 S 120th Place
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Seattle
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	11,688
Improvements, Costs capitalized subsequent to acquisition	(1,312)
Carry costs, Costs capitalized subsequent to acquisition	(5,351)
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	5,025
Total	5,025
Accumulated depreciation and amortization	$ (5,024)
8435 Stemmons Freeway
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	5,023
Improvements, Costs capitalized subsequent to acquisition	2,725
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	7,748
Total	7,748
Accumulated depreciation and amortization	$ (2,818)
2625 Walsh Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	4,276
Improvements, Costs capitalized subsequent to acquisition	9,051
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	13,327
Total	13,327
Accumulated depreciation and amortization	$ (4,017)
111 8th Avenue - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	42,454
Improvements, Costs capitalized subsequent to acquisition	18,899
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	61,353
Total	61,353
Accumulated depreciation and amortization	$ (23,063)
350 East Cermak Road - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	13,933
Improvements, Costs capitalized subsequent to acquisition	11,031
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	24,964
Total	24,964
Accumulated depreciation and amortization	$ (8,114)
200 Paul Avenue - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	San Francisco
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	6,719
Improvements, Costs capitalized subsequent to acquisition	4,632
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	11,351
Total	11,351
Accumulated depreciation and amortization	$ (3,864)
2323 Bryan Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	5,191
Improvements, Costs capitalized subsequent to acquisition	5,621
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	10,812
Total	10,812
Accumulated depreciation and amortization	$ (3,728)
600 W. 7th Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Los Angeles
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,689
Improvements, Costs capitalized subsequent to acquisition	8,050
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	11,739
Total	11,739
Accumulated depreciation and amortization	$ (3,018)
3825 NW Aloclek Place - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Portland
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,131
Improvements, Costs capitalized subsequent to acquisition	1,347
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	4,478
Total	4,478
Accumulated depreciation and amortization	$ (1,857)
120 E. Van Buren Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Phoenix
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	2,848
Improvements, Costs capitalized subsequent to acquisition	3,451
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	6,299
Total	6,299
Accumulated depreciation and amortization	$ (1,910)
36 NE 2nd Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Miami
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	1,842
Improvements, Costs capitalized subsequent to acquisition	4,374
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	6,216
Total	6,216
Accumulated depreciation and amortization	$ (1,929)
600-780 S. Federal Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	1,815
Improvements, Costs capitalized subsequent to acquisition	4,577
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	6,392
Total	6,392
Accumulated depreciation and amortization	$ (1,588)
113 N. Myers Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Charlotte
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	476
Improvements, Costs capitalized subsequent to acquisition	1,142
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	1,618
Total	1,618
Accumulated depreciation and amortization	$ (482)
1100 Space Park Drive - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	352
Improvements, Costs capitalized subsequent to acquisition	2,265
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,617
Total	2,617
Accumulated depreciation and amortization	$ (484)
300 Boulevard East - Telx
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	197
Improvements, Costs capitalized subsequent to acquisition	168
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	365
Total	365
Accumulated depreciation and amortization	$ (186)
Science Park
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	665
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	75,095
Improvements, Costs capitalized subsequent to acquisition	13,037
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	88,797
Total	88,797
Accumulated depreciation and amortization	$ (8,152)
Sovereign House
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	7,943
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	75,184
Improvements, Costs capitalized subsequent to acquisition	58,238
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	141,365
Total	141,365
Accumulated depreciation and amortization	$ (20,816)
Amstel Business Park
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	2,991
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	58,138
Improvements, Costs capitalized subsequent to acquisition	12,448
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,028
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	70,549
Total	73,577
Accumulated depreciation and amortization	$ (20,491)
Olivers Yard
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	7,943
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	34,744
Improvements, Costs capitalized subsequent to acquisition	2,357
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	45,044
Total	45,044
Accumulated depreciation and amortization	$ (13,783)
Bonnington House
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	14,127
Improvements, Costs capitalized subsequent to acquisition	64,055
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	78,182
Total	78,182
Accumulated depreciation and amortization	$ (1,405)
West Drayton
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	10,135
Improvements, Costs capitalized subsequent to acquisition	3,519
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	13,654
Total	13,654
Accumulated depreciation and amortization	$ (7,281)
Lyonerstrasse
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Frankfurt
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	8,407
Improvements, Costs capitalized subsequent to acquisition	6,393
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	14,800
Total	14,800
Accumulated depreciation and amortization	$ (5,137)
Meridian Gate
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	5,893
Improvements, Costs capitalized subsequent to acquisition	1,621
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	7,514
Total	7,514
Accumulated depreciation and amortization	$ (3,829)
2425-2553 Edgington Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	11,950
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	1,615
Improvements, Costs capitalized subsequent to acquisition	64
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	11,959
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	1,670
Total	13,629
Accumulated depreciation and amortization	$ (160)
44520 Hastings Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 104,000
Land, Initial costs	6,140
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	108,105
Improvements, Costs capitalized subsequent to acquisition	1,581
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,140
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	109,686
Total	115,826
Accumulated depreciation and amortization	$ (14,806)
44480 Hastings Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	12,860
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	278,384
Improvements, Costs capitalized subsequent to acquisition	1,227
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,860
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	279,611
Total	292,471
Accumulated depreciation and amortization	$ (38,147)
44521 Hastings Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	13,210
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	315,539
Improvements, Costs capitalized subsequent to acquisition	361
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	13,210
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	315,900
Total	329,110
Accumulated depreciation and amortization	$ (43,315)
44461 Chilum Place
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	9,620
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	249,371
Improvements, Costs capitalized subsequent to acquisition	523
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	9,620
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	249,894
Total	259,514
Accumulated depreciation and amortization	$ (34,452)
21625 Gresham Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	17,500
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	448,968
Improvements, Costs capitalized subsequent to acquisition	488
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	17,500
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	449,456
Total	466,956
Accumulated depreciation and amortization	$ (62,151)
2200 Busse Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	17,270
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	384,558
Improvements, Costs capitalized subsequent to acquisition	1,905
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	17,270
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	386,463
Total	403,733
Accumulated depreciation and amortization	$ (50,399)
2299 Busse Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	12,780
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	348,348
Improvements, Costs capitalized subsequent to acquisition	(1,687)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,780
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	346,661
Total	359,441
Accumulated depreciation and amortization	$ (47,004)
1780 Business Center Drive
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	7,510
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	106,363
Improvements, Costs capitalized subsequent to acquisition	1,122
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,510
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	107,485
Total	114,995
Accumulated depreciation and amortization	$ (13,001)
8217 Linton Hall Road
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	22,340
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	81,985
Improvements, Costs capitalized subsequent to acquisition	355
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	22,340
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	82,340
Total	104,680
Accumulated depreciation and amortization	$ (9,386)
1400 East Devon Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	11,012
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	178,627
Improvements, Costs capitalized subsequent to acquisition	45,871
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	9,994
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	225,516
Total	235,510
Accumulated depreciation and amortization	$ (17,462)
2220 De La Cruz Blvd
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	84,650
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	634,007
Improvements, Costs capitalized subsequent to acquisition	4,588
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	84,650
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	638,595
Total	723,245
Accumulated depreciation and amortization	$ (81,549)
1 Century Place
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Toronto
Encumbrances	$ 0
Land, Initial costs	26,600
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	116,863
Improvements, Costs capitalized subsequent to acquisition	1,302
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	8,479
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	136,286
Total	144,765
Accumulated depreciation and amortization	$ (4,861)
505 North Railroad Avenue
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	20,431
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	245,810
Improvements, Costs capitalized subsequent to acquisition	(33,149)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,271
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	220,821
Total	233,092
Accumulated depreciation and amortization	$ (12,612)
250 Williams
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Atlanta
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	26,774
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	26,774
Total	26,774
Accumulated depreciation and amortization	$ (5,240)
CME Agreement
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	42,875
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	42,875
Total	42,875
Accumulated depreciation and amortization	$ (21,741)
De President II
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	6,315
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	37,181
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,453
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	41,043
Total	43,496
Accumulated depreciation and amortization	$ 0
2825-2845 Lafayette Street
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	2,941
Improvements, Costs capitalized subsequent to acquisition	60
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	3,001
Total	3,001
Accumulated depreciation and amortization	$ (3,001)
21780 Filigree Court
Real Estate and Accumulated Depreciation [Line Items]
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	24,315
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	3,039
Improvements, Costs capitalized subsequent to acquisition	1,346
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	25,740
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,960
Total	28,700
Accumulated depreciation and amortization	(491)
Other
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	55,482
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	25
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	55,457
Total	55,482
Accumulated depreciation and amortization	$ (18,053)

Schedule III Properties And A_3

Schedule III Properties And Accumulated Depreciation (Narrative) (Details) $ in Billions	Dec. 31, 2019USD ($)
Schedule III Properties And Accumulated Depreciation
Aggregate gross cost of properties for federal income tax purposes	$ 19.7

Schedule III Properties And A_4

Schedule III Properties And Accumulated Depreciation (Summary Of Historical Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, beginning of year	$ 17,055,016	$ 16,915,936	$ 11,558,469
Additions during period (acquisitions and improvements)	833,836	223,163	5,663,404
Deductions during period (dispositions, impairments and assets held for sale)	(1,002,260)	(84,083)	(305,937)
Balance, end of year	$ 16,886,592	$ 17,055,016	$ 16,915,936

Schedule III Properties And A_5

Schedule III Properties And Accumulated Depreciation (Summary Of Accumulated Depreciation And Amortization) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, beginning of year	$ 3,935,267	$ 3,238,227	$ 2,668,509
Additions during period (depreciation and amortization expense)	805,916	714,336	612,970
Deductions during period (dispositions and assets held for sale)	(205,014)	(17,296)	(43,252)
Balance, end of year	$ 4,536,169	$ 3,935,267	$ 3,238,227