Digital Realty Trust 10-K 25 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 21, 2019	Jun. 30, 2018
Statement [Line Items]
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Registrant Name	Digital Realty Trust, Inc.
Entity Central Index Key	1,297,996
Entity Current Reporting Status	Yes
Entity Voluntary Filer	No
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		207,823,842
Entity Public Float			$ 23,000,000,000
Entity Well-known Seasoned Issuer	Yes
Digital Realty Trust, L.P.
Statement [Line Items]
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Entity Registrant Name	Digital Realty Trust, L.P.
Entity Central Index Key	1,494,877
Entity Current Reporting Status	Yes
Entity Voluntary Filer	No
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		0
Entity Public Float			$ 0
Entity Well-known Seasoned Issuer	No

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Properties:
Land	$ 1,509,764	$ 1,136,341
Acquired ground leases	10,575	11,150
Buildings and improvements	16,745,210	15,215,405
Tenant improvements	574,336	553,040
Total investments in properties	18,839,885	16,915,936
Accumulated depreciation and amortization	(3,935,267)	(3,238,227)
Net investments in properties	14,904,618	13,677,709
Investments in unconsolidated joint ventures	175,108	163,477
Net investments in real estate	15,079,726	13,841,186
Cash and cash equivalents	126,700	51
Accounts and other receivables, net of allowance for doubtful accounts of $11,554 and $6,737 as of December 31, 2018 and December 31, 2017, respectively	299,621	276,347
Deferred rent	463,248	430,026
Acquired above-market leases, net of accumulated amortization of $158,037 and $110,139 as of December 31, 2018 and December 31, 2017, respectively	119,759	184,375
Goodwill	4,348,007	3,389,595
Acquired in-place lease value, deferred leasing costs and intangibles, net of accumulated amortization of $1,355,013 and $1,016,989 as of December 31, 2018 and December 31, 2017, respectively	3,144,395	2,998,806
Restricted cash	8,522	13,130
Assets held for sale	0	139,538
Other assets	176,717	131,291
Total assets	23,766,695	21,404,345
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	7,589,126	6,570,757
Secured debt, including premiums	685,714	106,582
Accounts payable and other accrued liabilities	1,164,509	980,218
Accrued dividends and distributions	217,241	199,761
Acquired below-market leases, net of accumulated amortization of $242,422 and $219,654 as of December 31, 2018 and December 31, 2017, respectively	200,113	249,465
Security deposits and prepaid rents	209,311	217,898
Obligations associated with assets held for sale	0	5,033
Total liabilities	12,892,653	10,300,993
Redeemable noncontrolling interests – operating partnership	15,832	53,902
Commitments and contingencies
Stockholders’ Equity:
Preferred Stock: $0.01 par value per share, 110,000,000 shares authorized, 50,650,000 shares issued and outstanding as of December 31, 2018 and December 31, 2017	1,249,560	1,249,560
Common Stock: $0.01 par value, 315,000,000 shares authorized; 206,425,656 and 205,470,300 shares issued and outstanding as of December 31, 2018 and December 31, 2017, respectively	2,051	2,044
Additional paid-in capital	11,355,751	11,261,461
Accumulated dividends in excess of earnings	(2,633,071)	(2,055,552)
Accumulated other comprehensive loss, net	(115,647)	(108,432)
Total stockholders’ equity	9,858,644	10,349,081
Noncontrolling interests:
Noncontrolling interests in operating partnership	906,510	698,126
Noncontrolling interests in consolidated joint ventures	93,056	2,243
Total noncontrolling interests	999,566	700,369
Total equity	10,858,210	11,049,450
Total liabilities and equity	23,766,695	21,404,345
Digital Realty Trust, L.P.
Properties:
Land	1,509,764	1,136,341
Acquired ground leases	10,575	11,150
Buildings and improvements	16,745,210	15,215,405
Tenant improvements	574,336	553,040
Total investments in properties	18,839,885	16,915,936
Accumulated depreciation and amortization	(3,935,267)	(3,238,227)
Net investments in properties	14,904,618	13,677,709
Investments in unconsolidated joint ventures	175,108	163,477
Net investments in real estate	15,079,726	13,841,186
Cash and cash equivalents	126,700	51
Accounts and other receivables, net of allowance for doubtful accounts of $11,554 and $6,737 as of December 31, 2018 and December 31, 2017, respectively	299,621	276,347
Deferred rent	463,248	430,026
Acquired above-market leases, net of accumulated amortization of $158,037 and $110,139 as of December 31, 2018 and December 31, 2017, respectively	119,759	184,375
Goodwill	4,348,007	3,389,595
Acquired in-place lease value, deferred leasing costs and intangibles, net of accumulated amortization of $1,355,013 and $1,016,989 as of December 31, 2018 and December 31, 2017, respectively	3,144,395	2,998,806
Restricted cash	8,522	13,130
Assets held for sale	0	139,538
Other assets	176,717	131,291
Total assets	23,766,695	21,404,345
LIABILITIES AND EQUITY
Unsecured senior notes, net of discount	7,589,126	6,570,757
Secured debt, including premiums	685,714	106,582
Accounts payable and other accrued liabilities	1,164,509	980,218
Accrued dividends and distributions	217,241	199,761
Acquired below-market leases, net of accumulated amortization of $242,422 and $219,654 as of December 31, 2018 and December 31, 2017, respectively	200,113	249,465
Security deposits and prepaid rents	209,311	217,898
Obligations associated with assets held for sale	0	5,033
Total liabilities	12,892,653	10,300,993
Redeemable noncontrolling interests – operating partnership	15,832	53,902
Commitments and contingencies
Stockholders’ Equity:
Preferred Stock: $0.01 par value per share, 110,000,000 shares authorized, 50,650,000 shares issued and outstanding as of December 31, 2018 and December 31, 2017	1,249,560	1,249,560
Common units, 206,425,656 and 205,470,300 units issued and outstanding as of December 31, 2018 and December 31, 2017, respectively	8,724,731	9,207,953
Limited Partners, 10,580,884 and 8,489,095 units outstanding as of December 31, 2018 and December 31, 2017, respectively	911,256	702,579
Accumulated other comprehensive loss, net	(120,393)	(112,885)
Total partners’ capital	10,765,154	11,047,207
Noncontrolling interests:
Noncontrolling interests in consolidated joint ventures	93,056	2,243
Total capital	10,858,210	11,049,450
Total liabilities and equity	23,766,695	21,404,345
Global revolving credit facilities
LIABILITIES AND EQUITY
Line of credit	1,647,735	550,946
Global revolving credit facilities | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	1,647,735	550,946
Unsecured term loan
LIABILITIES AND EQUITY
Line of credit	1,178,904	1,420,333
Unsecured term loan | Digital Realty Trust, L.P.
LIABILITIES AND EQUITY
Line of credit	$ 1,178,904	$ 1,420,333

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Allowance for doubtful accounts	$ 11,554	$ 6,737
Accumulated amortization, deferred leasing costs and intangibles	1,355,013	1,016,989
Accumulated amortization, below market leases	$ 242,422	$ 219,654
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	110,000,000	110,000,000
Preferred stock, shares issued (in shares)	50,650,000	50,650,000
Preferred stock, shares outstanding (in shares)	50,650,000	50,650,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	315,000,000	315,000,000
Common stock, shares issued (in shares)	206,425,656	205,470,300
Common stock, shares outstanding (in shares)	206,425,656	205,470,300
Liquidation preference	$ 1,266,250	$ 1,266,250
Preferred stock, liquidation preference per share (in dollars per share)	$ 25	$ 25
Acquired above-market leases
Accumulated amortization, acquired above market leases	$ 158,037	$ 110,139
Digital Realty Trust, L.P.
Allowance for doubtful accounts	11,554	6,737
Accumulated amortization, deferred leasing costs and intangibles	1,355,013	1,016,989
Accumulated amortization, below market leases	$ 242,422	$ 219,654
Preferred units, issued (in units)	50,650,000,000	50,650,000,000
Preferred units, outstanding (in units)	50,650,000,000	50,650,000,000
Limited Partners, units outstanding (in units)	10,580,884	8,489,095
Common units, issued (in units)	206,425,656	205,470,300
Common units, outstanding (in units)	206,425,656	205,470,300
Digital Realty Trust, L.P. | Acquired above-market leases
Accumulated amortization, acquired above market leases	$ 158,037	$ 110,139

CONSOLIDATED INCOME STATEMENTS

CONSOLIDATED INCOME STATEMENTS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Revenues:
Rental and other services	$ 2,412,076	$ 2,010,301	$ 1,746,828
Tenant reimbursements	624,637	440,224	355,903
Fee income and other	9,765	7,403	39,482
Total operating revenues	3,046,478	2,457,928	2,142,213
Operating Expenses:
Rental property operating and maintenance	957,065	759,616	660,177
Property taxes	129,516	124,014	102,497
Insurance	11,402	10,981	9,492
Depreciation and amortization	1,186,896	842,464	699,324
General and administrative	163,667	161,441	152,733
Transaction and integration expenses	45,327	76,048	20,491
Impairment of investments in real estate	0	28,992	0
Other	2,818	3,077	213
Total operating expenses	2,496,691	2,006,633	1,644,927
Operating income	549,787	451,295	497,286
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	32,979	25,516	17,104
Gain on sale of properties	80,049	40,354	169,902
Interest and other income	3,481	3,655	(4,564)
Interest expense	(321,529)	(258,642)	(236,480)
Tax expense	(2,084)	(7,901)	(10,385)
(Loss) gain from early extinguishment of debt	(1,568)	1,990	(1,011)
Net income	341,115	256,267	431,852
Net income attributable to noncontrolling interests	(9,869)	(8,008)	(5,665)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	331,246	248,259	426,187
Preferred stock dividends/Preferred units distributions	(81,316)	(68,802)	(83,771)
Issuance costs associated with redeemed preferred stock	0	(6,309)	(10,328)
Net income available to common stockholders/unitholders	$ 249,930	$ 173,148	$ 332,088
Net income per share/unit available to common stockholders/unitholders:
Basic (in dollars per share)	$ 1.21	$ 0.99	$ 2.21
Diluted (in dollars per share)	$ 1.21	$ 0.99	$ 2.20
Weighted average common shares/units outstanding:
Basic (in shares)	206,035,408	174,059,386	149,953,662
Diluted (in shares)	206,673,471	174,895,098	150,679,688
Digital Realty Trust, L.P.
Operating Revenues:
Rental and other services	$ 2,412,076	$ 2,010,301	$ 1,746,828
Tenant reimbursements	624,637	440,224	355,903
Fee income and other	9,765	7,403	39,482
Total operating revenues	3,046,478	2,457,928	2,142,213
Operating Expenses:
Rental property operating and maintenance	957,065	759,616	660,177
Property taxes	129,516	124,014	102,497
Insurance	11,402	10,981	9,492
Depreciation and amortization	1,186,896	842,464	699,324
General and administrative	163,667	161,441	152,733
Transaction and integration expenses	45,327	76,048	20,491
Impairment of investments in real estate	0	28,992	0
Other	2,818	3,077	213
Total operating expenses	2,496,691	2,006,633	1,644,927
Operating income	549,787	451,295	497,286
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	32,979	25,516	17,104
Gain on sale of properties	80,049	40,354	169,902
Interest and other income	3,481	3,655	(4,564)
Interest expense	(321,529)	(258,642)	(236,480)
Tax expense	(2,084)	(7,901)	(10,385)
(Loss) gain from early extinguishment of debt	(1,568)	1,990	(1,011)
Net income	341,115	256,267	431,852
Net loss (income) attributable to noncontrolling interests in consolidated joint ventures	311	(4,238)	(367)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	341,426	252,029	431,485
Preferred stock dividends/Preferred units distributions	(81,316)	(68,802)	(83,771)
Issuance costs associated with redeemed preferred stock	0	(6,309)	(10,328)
Net income available to common stockholders/unitholders	$ 260,110	$ 176,918	$ 337,386
Net income per share/unit available to common stockholders/unitholders:
Basic (in dollars per share)	$ 1.21	$ 0.99	$ 2.21
Diluted (in dollars per share)	$ 1.21	$ 0.99	$ 2.20
Weighted average common shares/units outstanding:
Basic (in shares)	214,312,871	178,055,936	152,359,680
Diluted (in shares)	214,950,934	178,891,648	153,085,706

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 341,115	$ 256,267	$ 431,852
Other comprehensive income:
Foreign currency translation (loss) income adjustments	(11,736)	28,709	(86,621)
Increase (decrease) in fair value of interest rate swaps and foreign currency hedges	8,197	(3,434)	41,998
Reclassification to interest expense from interest rate swaps	(3,969)	2,459	4,968
Comprehensive income	333,607	284,001	392,197
Comprehensive loss (income) attributable to noncontrolling interests in consolidated joint ventures	(9,576)	(8,569)	(5,025)
Comprehensive income attributable to Digital Realty Trust, Inc.	324,031	275,432	387,172
Digital Realty Trust, L.P.
Net income	341,115	256,267	431,852
Other comprehensive income:
Foreign currency translation (loss) income adjustments	(11,736)	28,709	(86,621)
Increase (decrease) in fair value of interest rate swaps and foreign currency hedges	8,197	(3,434)	41,998
Reclassification to interest expense from interest rate swaps	(3,969)	2,459	4,968
Comprehensive income	333,607	284,001	392,197
Comprehensive loss (income) attributable to noncontrolling interests in consolidated joint ventures	311	(4,238)	(367)
Comprehensive income attributable to Digital Realty Trust, Inc.	$ 333,918	$ 279,763	$ 391,830

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Redeemable Limited Partner Common Units	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Dividends in Excess of Earnings	Accumulated Other Comprehensive Income (Loss), net	Total Stockholders’ Equity	Noncontrolling Interests in Operating Partnership	Noncontrolling Interests in Consolidated Joint Ventures	Total Noncontrolling Interests	Series E Preferred Stock	Series E Preferred StockPreferred Stock	Series E Preferred StockAccumulated Dividends in Excess of Earnings	Series E Preferred StockTotal Stockholders’ Equity	Series J Preferred Stock	Series J Preferred StockPreferred Stock	Series J Preferred StockTotal Stockholders’ Equity	Series F Preferred Stock	Series F Preferred StockPreferred Stock	Series F Preferred StockAccumulated Dividends in Excess of Earnings	Series F Preferred StockTotal Stockholders’ Equity	DFT Merger	DFT MergerRedeemable Limited Partner Common Units	DFT MergerCommon Stock	DFT MergerAdditional Paid-in Capital	DFT MergerTotal Stockholders’ Equity	DFT MergerNoncontrolling Interests in Operating Partnership	DFT MergerTotal Noncontrolling Interests	DFT MergerSeries C Preferred Stock	DFT MergerSeries C Preferred StockPreferred Stock	DFT MergerSeries C Preferred StockTotal Stockholders’ Equity	Ascenty Acquisition	Ascenty AcquisitionNoncontrolling Interests in Operating Partnership	Ascenty AcquisitionNoncontrolling Interests in Consolidated Joint Ventures	Ascenty AcquisitionTotal Noncontrolling Interests
Balance at beginning of period at Dec. 31, 2015	$ 4,536,502	$ 0	$ 1,290,135	$ 1,456	$ 4,655,220	$ (1,350,089)	$ (96,590)	$ 4,500,132	$ 29,612	$ 6,758	$ 36,370
Balance at beginning of period (in shares) at Dec. 31, 2015				146,384,247
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of common units to common stock	0			$ 5	5,237			5,242	(5,242)		(5,242)
Conversion of common units to common stock (in shares)				430,493
Issuance of unvested restricted stock, net of forfeitures (in shares)				120,082
Issuance of common stock in exchange for cash, net of offering costs	1,085,444			$ 120	1,085,324			1,085,444
Issuance of series J preferred units, net of offering costs (in shares)				12,000,000
Exercise of stock options	1,380				1,380			1,380
Exercise of stock options (in shares)				33,948
Redemption of preferred units												$ (287,500)	$ (277,172)	$ (10,328)	$ (287,500)
Preferred stock offering costs	(2)		(2)					(2)
Amortization of unearned compensation on share-based awards	24,113				24,113			24,113
Reclassification of vested share-based awards	0				(10,125)			(10,125)	10,125		10,125
Dividends declared on preferred stock	(83,771)					(83,771)		(83,771)
Dividends and distributions on common stock and common and incentive units	(538,888)					(529,419)		(529,419)	(9,469)		(9,469)
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions	(527)									(527)	(527)
Net income	431,852					426,187		426,187	5,298	367	5,665
Other comprehensive income— foreign currency translation adjustments	(86,621)						(85,300)	(85,300)	(1,321)		(1,321)
Other comprehensive income— fair value of interest rate swaps	41,998						41,395	41,395	603		603
Other comprehensive income— reclassification of accumulated other comprehensive income to interest expense	4,968						4,890	4,890	78		78
Balance at end of period at Dec. 31, 2016	5,132,297	0	1,012,961	$ 1,582	5,764,497	(1,547,420)	(135,605)	5,096,015	29,684	6,598	36,282
Balance at end of period (in shares) at Dec. 31, 2016				159,019,118
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of common units to common stock	0			$ 6	10,003			10,009	(10,009)		(10,009)
Conversion of common units to common stock (in shares)				562,582
Issuance of unvested restricted stock, net of forfeitures (in shares)				249,050
Units issued in connection with business combinations																							$ 5,924,124	$ 66,259	$ 432	$ 5,247,126	$ 5,247,558	$ 676,566	$ 676,566
Units issued in connection with business combinations (in shares)																									43,175,629
Issuance of common stock in exchange for cash, net of offering costs	$ 211,897			$ 24	211,873			211,897								$ 193,540	$ 193,540	$ 193,540												$ 219,250	$ 219,250	$ 219,250
Issuance of series J preferred units, net of offering costs (in shares)	6,111,770			2,375,000
Exercise of stock options	$ 729				729			729
Exercise of stock options (in shares)				17,668
Shares issued under employee stock purchase plan	$ 5,143
Shares issued under employee stock purchase plan (in shares)	71,253
Redemption of preferred units																			$ (182,500)	$ (176,191)	$ (6,309)	$ (182,500)
Amortization of unearned compensation on share-based awards	$ 27,981				27,981			27,981
Reclassification of vested share-based awards	0				(10,057)			(10,057)	10,057		10,057
Adjustment to redeemable noncontrolling interests—operating partnership	(12,357)				(4,166)			(4,166)	(8,191)		(8,191)													$ 12,357
Dividends declared on preferred stock	(68,802)					(68,802)		(68,802)
Dividends and distributions on common stock and common and incentive units	(701,974)					(681,280)		(681,280)	(20,694)		(20,694)
Distributions to noncontrolling interests in consolidated joint ventures, net of contributions	(8,593)									(8,593)	(8,593)
Net income	256,267					248,259		248,259	3,770	4,238	8,008
Other comprehensive income— foreign currency translation adjustments	28,709						28,272	28,272	437		437
Other comprehensive income— fair value of interest rate swaps	(3,434)						(3,513)	(3,513)	79		79
Other comprehensive income— reclassification of accumulated other comprehensive income to interest expense	2,459						2,414	2,414	45		45
Balance at end of period at Dec. 31, 2017	11,049,450	53,902	1,249,560	$ 2,044	11,261,461	(2,055,552)	(108,432)	10,349,081	698,126	2,243	700,369
Balance at end of period (in shares) at Dec. 31, 2017				205,470,300
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of common units to common stock	0			$ 7	61,997			62,004	(62,004)		(62,004)
Conversion of common units to common stock (in shares)				711,892
Issuance of unvested restricted stock, net of forfeitures (in shares)				220,765
Units issued in connection with business combinations																																	$ 278,837	$ 253,837	$ 25,000	$ 278,837
Issuance of common stock in exchange for cash, net of offering costs	$ 1,194				1,194			1,194
Issuance of series J preferred units, net of offering costs (in shares)	2,338,874
Shares issued under employee stock purchase plan	$ 5,874			$ 1	5,873			5,874
Shares issued under employee stock purchase plan (in shares)				69,532
Shares repurchased and retired to satisfy tax withholding upon vesting	$ (5,055)			$ (1)	(5,054)			(5,055)
Shares repurchased and retired to satisfy tax withholding upon vesting (in shares)	(46,833)			(46,833)
Amortization of unearned compensation on share-based awards	$ 32,456				32,456			32,456
Reclassification of vested share-based awards	0				(3,772)			(3,772)	3,772		3,772
Adjustment to redeemable noncontrolling interests—operating partnership	37,274	(37,274)			1,596			1,596	35,678		35,678
Dividends declared on preferred stock	(81,316)					(81,316)		(81,316)
Dividends and distributions on common stock and common and incentive units	(865,675)	(1,271)				(833,364)		(833,364)	(32,311)		(32,311)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions	66,124									66,124	66,124
Net income	341,115
Net income	340,640	475				331,246		331,246	9,705	(311)	9,394
Other comprehensive income— foreign currency translation adjustments	(11,736)						(11,279)	(11,279)	(457)		(457)
Other comprehensive income— fair value of interest rate swaps	8,197						7,890	7,890	307		307
Other comprehensive income— reclassification of accumulated other comprehensive income to interest expense	(3,969)						(3,826)	(3,826)	(143)		(143)
Balance at end of period at Dec. 31, 2018	10,858,210	$ 15,832	$ 1,249,560	$ 2,051	$ 11,355,751	(2,633,071)	$ (115,647)	9,858,644	$ 906,510	$ 93,056	$ 999,566
Balance at end of period (in shares) at Dec. 31, 2018				206,425,656
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment from adoption of new accounting standard	$ 5,915					$ 5,915		$ 5,915

CONSOLIDATED STATEMENTS OF CAPI

CONSOLIDATED STATEMENTS OF CAPITAL - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance (in units)		205,470,300			205,470,300
Conversion of limited partner common units to general partner common units					$ 62,004	$ 10,009	$ 5,242
Issuance of series J preferred units, net of offering costs (in units)					2,338,874	6,111,770
Units issued in connection with employee stock purchase plan					$ 5,874	$ 5,143
Shares repurchased and retired to satisfy tax withholding upon vesting					$ (5,055)
Units repurchased and retired to satisfy tax withholding upon vesting (in units)					(46,833)
Units issued in connection with employee stock purchase plan (in units)						71,253
Amortization of unearned compensation on share-based awards					$ 32,456	$ 27,981	24,113
Cumulative effect adjustment from adoption of new accounting standard	$ 5,915				5,915
Net income	$ 52,597	$ 110,095	$ 79,658	$ 84,563	341,115	256,267	431,852
Other comprehensive income— foreign currency translation adjustments					(11,736)	28,709	(86,621)
Other comprehensive income— fair value of interest rate swaps					8,197	(3,434)	41,998
Other comprehensive income— reclassification of accumulated other comprehensive income to interest expense					$ (3,969)	$ 2,459	4,968
Balance (in units)	206,425,656		205,470,300		206,425,656	205,470,300
DFT Merger
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations						$ 5,924,124
Ascenty Acquisition
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations					$ 278,837
Digital Realty Trust, L.P.
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		11,049,450		5,132,297	11,049,450	5,132,297	4,535,137
Common unit offering costs					1,194	211,897	1,085,444
Issuance of common units in connection with the exercise of stock options						729	1,380
Preferred unit offering costs							2
Units issued in connection with employee stock purchase plan					5,874	5,143	3,349
Shares repurchased and retired to satisfy tax withholding upon vesting					(5,055)
Issuance of series J preferred units, net of offering costs						193,540
Redemption of preferred units						(182,500)	(287,500)
Amortization of unearned compensation on share-based awards					32,456	27,981	24,113
Adjustment to redeemable common units					37,274	12,357
Distributions					(946,991)	(770,776)	(621,294)
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions					66,124	(8,593)	(527)
Net income	$ 52,597	110,095	$ 79,658	84,563	341,115	256,267	431,852
Net income					340,640
Other comprehensive income— foreign currency translation adjustments					(11,736)	28,709	(86,621)
Other comprehensive income— fair value of interest rate swaps					8,197	(3,434)	41,998
Other comprehensive income— reclassification of accumulated other comprehensive income to interest expense					(3,969)	2,459	4,968
Balance at end of period	10,858,210		11,049,450		10,858,210	11,049,450	5,132,297
Digital Realty Trust, L.P. | DFT Merger
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations						5,924,124
Digital Realty Trust, L.P. | Ascenty Acquisition
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations					278,837
Redeemable Limited Partner Common Units | Digital Realty Trust, L.P.
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		53,902		0	53,902	0	0
Adjustment to redeemable common units					(37,274)	(12,357)
Distributions					(1,271)
Net income					475
Balance at end of period	15,832		53,902		15,832	$ 53,902	0
Redeemable Limited Partner Common Units | Digital Realty Trust, L.P. | DFT Merger
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations (in units)						66,259,000
Accumulated Other Comprehensive Income (Loss) | Digital Realty Trust, L.P.
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		(112,885)		(140,619)	(112,885)	$ (140,619)	(100,964)
Other comprehensive income— foreign currency translation adjustments					(11,736)	28,709	(86,621)
Other comprehensive income— fair value of interest rate swaps					8,197	(3,434)	41,998
Other comprehensive income— reclassification of accumulated other comprehensive income to interest expense					(3,969)	2,459	4,968
Balance at end of period	(120,393)		(112,885)		(120,393)	(112,885)	(140,619)
Noncontrolling Interests in Consolidated Joint Ventures | Digital Realty Trust, L.P.
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		2,243		6,598	2,243	6,598	6,758
Contributions from noncontrolling interests in consolidated joint ventures, net of distributions					66,124	(8,593)	(527)
Net income						4,238	367
Net income					(311)
Balance at end of period	93,056		2,243		93,056	2,243	6,598
Noncontrolling Interests in Consolidated Joint Ventures | Digital Realty Trust, L.P. | Ascenty Acquisition
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations					25,000
General Partner | Preferred Units | Digital Realty Trust, L.P.
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		$ 1,249,560		$ 1,012,961	$ 1,249,560	$ 1,012,961	$ 1,290,135
Balance (in units)		50,650,000		41,900,000	50,650,000	41,900,000	53,400,000
Issuance of common units in connection with business combinations						$ 219,250
Issuance of common units in connection with business combinations (in units)						8,050,000
Issuance of series J preferred units, net of offering costs (in units)						8,000,000
Preferred unit offering costs							$ 2
Issuance of series J preferred units, net of offering costs						$ 193,540
Redemption of preferred units						$ (176,191)	$ (277,172)
Redemption of preferred units (in units)						(7,300,000)	(11,500,000)
Distributions					$ (81,316)	$ (68,802)	$ (83,771)
Net income						68,802	83,771
Net income					81,316
Balance at end of period	$ 1,249,560		$ 1,249,560		$ 1,249,560	$ 1,249,560	$ 1,012,961
Balance (in units)	50,650,000		50,650,000		50,650,000	50,650,000	41,900,000
General Partner | Common Units | Digital Realty Trust, L.P.
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		$ 9,207,953		$ 4,218,659	$ 9,207,953	$ 4,218,659	$ 3,305,222
Balance (in units)		205,470,300		159,019,118	205,470,300	159,019,118	146,384,247
Conversion of limited partner common units to general partner common units					$ 62,004	$ 10,009	$ 5,242
Conversion of limited partner common units to general partner common units (in units)					711,892	562,582	430,493
Issuance of restricted common units, net of forfeitures (in units)					220,765	249,050	120,082
Common unit offering costs					$ 1,194	$ 211,897	$ 1,085,444
Issuance of common units, net of offering costs (in units)						2,375,000	12,000,000
Issuance of common units in connection with the exercise of stock options						$ 729	$ 1,380
Issuance of common units in connection with the exercise of stock options (in units)						17,668	33,948
Units issued in connection with employee stock purchase plan					$ 5,874	$ 5,143	$ 3,349
Units issued in connection with employee stock purchase plan (in units)					69,532	71,253	50,348
Redemption of preferred units						$ (6,309)	$ (10,328)
Amortization of unearned compensation on share-based awards					$ 32,456	27,981	24,113
Reclassification of vested share-based awards					(3,772)	(10,057)	(10,125)
Adjustment to redeemable common units					1,596	4,166
Distributions					(833,364)	(681,280)	(528,054)
Cumulative effect adjustment from adoption of new accounting standard	$ 5,915				5,915
Net income						179,457	342,416
Net income					249,930
Balance at end of period	$ 8,724,731		$ 9,207,953		$ 8,724,731	$ 9,207,953	$ 4,218,659
Balance (in units)	206,425,656		205,470,300		206,425,656	205,470,300	159,019,118
General Partner | Common Units | Digital Realty Trust, L.P. | DFT Merger
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations						$ 5,247,558
Issuance of common units in connection with business combinations (in units)						43,175,629
Limited Partners | Common Units | Digital Realty Trust, L.P.
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		$ 702,579		$ 34,698	$ 702,579	$ 34,698	$ 33,986
Balance (in units)		8,489,095		2,475,663	8,489,095	2,475,663	2,833,326
Conversion of limited partner common units to general partner common units					$ (62,004)	$ (10,009)	$ (5,242)
Conversion of limited partner common units to general partner common units (in units)					711,892	562,582	430,493
Issuance of common units, net of forfeitures (in units)					464,807	464,244	72,830
Reclassification of vested share-based awards					$ 3,772	$ 10,057	$ 10,125
Adjustment to redeemable common units					35,678	8,191
Distributions					(32,311)	(20,694)	(9,469)
Net income						3,770	5,298
Net income					9,705
Balance at end of period	$ 911,256		$ 702,579		$ 911,256	$ 702,579	$ 34,698
Balance (in units)	10,580,884		8,489,095		10,580,884	8,489,095	2,475,663
Limited Partners | Common Units | Digital Realty Trust, L.P. | DFT Merger
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations						$ 676,566
Issuance of common units in connection with business combinations (in units)						6,111,770
Limited Partners | Common Units | Digital Realty Trust, L.P. | Ascenty Acquisition
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units in connection with business combinations					$ 253,837
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, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 52,597	$ 79,658	$ 341,115	$ 256,267	$ 431,852
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of properties			(80,049)	(40,354)	(169,902)
Gain on lease termination			0	0	(29,205)
Unrealized gain on marketable equity security			(1,631)	0	0
Impairment of investments in real estate			0	28,992	0
Equity in earnings of unconsolidated joint ventures			(32,979)	(25,516)	(17,104)
Distributions from unconsolidated joint ventures			21,905	31,747	16,755
Write-off of net assets due to early lease terminations			2,818	3,076	213
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases			770,275	594,996	518,716
Amortization of acquired in-place lease value, deferred leasing costs and intangibles			416,621	247,468	180,608
Amortization of share-based unearned compensation			27,159	20,521	17,433
Non-cash amortization of terminated interest rate swaps			1,120	1,204	0
Allowance for (recovery of) doubtful accounts			6,304	(776)	1,602
Amortization of deferred financing costs			11,537	10,634	9,908
Loss (gain) on early extinguishment of debt			1,568	(1,990)	1,011
Amortization of debt discount/premium			3,538	2,992	2,616
Amortization of acquired above-market leases and acquired below-market leases, net			26,530	1,770	(8,351)
Changes in assets and liabilities, net of impact of business combinations
Accounts and other receivables			(21,318)	(73,717)	(13,754)
Deferred rent			(39,905)	(16,564)	(24,401)
Deferred leasing costs			(72,104)	(15,363)	60
Other assets			(9,145)	(1,800)	(69,924)
Accounts payable and other accrued liabilities			39,192	(16,384)	38,432
Security deposits and prepaid rents			(27,227)	16,102	24,677
Net cash provided by operating activities			1,385,324	1,023,305	911,242
Cash flows from investing activities:
Improvements to and advances for investments in real estate			(1,325,162)	(1,150,619)	(758,081)
Ascenty acquisition			(1,679,830)	0	0
Cash assumed in business combinations			116,000	20,650	0
Acquisitions of real estate, net of cash acquired			(410,712)	(415,764)	(873,285)
Proceeds from sale of assets, net of sales costs			286,204	89,333	359,319
Distribution of debt proceeds from closing of joint venture			0	135,793	0
Investments in unconsolidated joint ventures			(673)	(93,405)	0
Excess proceeds from forward contract settlement			0	63,956	0
Prepaid construction costs and other investments			(13,254)	0	(32,095)
Improvement advances to tenants			(48,502)	(50,857)	(16,239)
Collection of advances from tenants for improvements			39,936	43,760	16,784
Net cash used in investing activities			(3,035,993)	(1,357,153)	(1,303,597)
Cash flows from financing activities:
Borrowings on global revolving credit facility			3,046,245	2,180,556	2,533,507
Repayments on global revolving credit facility			(1,945,594)	(2,304,686)	(3,283,087)
Borrowings on unsecured term loans			467,922	0	766,201
Repayments on unsecured term loans			(674,332)	(371,520)	(170,736)
Borrowings on unsecured senior notes			1,169,006	2,265,060	675,591
Principal payments on unsecured senior notes			0	(884,841)	0
Borrowings on secured debt			600,000	104,000	0
Principal payments on secured debt			(594)	(105,546)	(299,826)
Repayments on other secured loans			0	(50,000)	(25,000)
Earnout payments related to acquisitions			0	0	(23,213)
Payment of loan fees and costs			(44,299)	(16,830)	(19,574)
Capital contributions from (distributions to) noncontrolling interests in consolidated joint ventures, net			66,124	(8,593)	(527)
Taxes paid related to net settlement of stock-based compensation awards			(5,055)	0	0
Proceeds from common and preferred stock offerings, net			1,194	405,437	1,085,442
Proceeds from equity plans			5,874	5,872	4,729
Redemption of preferred stock			0	(182,500)	(287,500)
Proceeds from forward swap contract			1,560	0	0
Payment of dividends to preferred stockholders/unitholders			(81,316)	(68,802)	(83,771)
Payment of distributions to common stockholders/unitholders			(849,466)	(646,407)	(521,619)
Net cash provided by financing activities			1,757,269	321,200	350,617
Net increase (decrease) in cash, cash equivalents and restricted cash			106,600	(12,648)	(41,738)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			15,441	3,793	(11,288)
Cash, cash equivalents and restricted cash at beginning of year			13,181	22,036	75,062
Cash, cash equivalents and restricted cash at end of year	135,222	13,181	135,222	13,181	22,036
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized			288,643	211,549	216,713
Cash paid for income taxes			11,224	9,456	3,698
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments			(11,736)	28,709	(86,621)
Accrual of dividends and distributions			217,241	199,761	144,194
Increase (decrease) in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps			8,197	(3,434)	41,998
Noncontrolling interests in operating partnership redeemed for or converted to shares of common stock			62,004	10,009	5,242
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses			189,508	149,548	128,531
Assumption of capital lease obligations upon acquisition			75,030	0	118,923
Non-cash derecognition of capital lease obligation			17,294	0	0
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate			410,712	366,105	378,431
Accounts receivable			0	0	8,537
Goodwill			0	0	448,123
Acquired above-market leases			0	21,043	0
Acquired in-place lease value and deferred leasing costs			0	30,111	226,877
Other assets			0	0	9,011
Capital lease obligations			0	0	(118,923)
Acquired below-market leases			0	(1,495)	(922)
Accounts payables and other accrued liabilities			0	0	(69,084)
Security deposits and prepaid rents			0	0	(8,765)
Cash paid for acquisition of real estate			410,712	415,764	873,285
Allocation of purchase price to business combinations:
Land	356,704	87,610	356,704	87,610
Goodwill	4,348,007	3,389,595	4,348,007	3,389,595
Noncontrolling interests in consolidated joint ventures	(93,056)	(2,243)	(93,056)	(2,243)
Issuance of preferred stock in connection with merger			(1,194)	(211,897)	(1,085,444)
Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Cash and cash equivalents	116,000	20,650	116,000	20,650
Land	0	312,579	0	312,579
Buildings and improvements	425,000	3,677,497	425,000	3,677,497
Accounts receivables and other assets	30,000	10,978	30,000	10,978
Tenant relationship and acquired in-place lease value	495,000	1,582,385	495,000	1,582,385
Goodwill	982,667	2,592,181	982,667	2,592,181
Accounts payable and other accrued liabilities	(90,000)	(248,259)	(90,000)	(248,259)
Acquired below-market leases	0	(185,543)	0	(185,543)
Other working capital, net	0	(22,640)	0	(22,640)
Redeemable noncontrolling interests -- operating partnership	0	(66,259)	0	(66,259)
Noncontrolling interests in operating partnership			(253,837)	(676,566)
Noncontrolling interests in consolidated joint ventures	(25,000)	0	(25,000)	0
Digital Realty Trust, L.P.
Cash flows from operating activities:
Net income	52,597	79,658	341,115	256,267	431,852
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of properties			(80,049)	(40,354)	(169,902)
Gain on lease termination			0	0	(29,205)
Unrealized gain on marketable equity security			(1,631)	0	0
Impairment of investments in real estate			0	28,992	0
Equity in earnings of unconsolidated joint ventures			(32,979)	(25,516)	(17,104)
Distributions from unconsolidated joint ventures			21,905	31,747	16,755
Write-off of net assets due to early lease terminations			2,818	3,076	213
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases			770,275	594,996	518,716
Amortization of acquired in-place lease value, deferred leasing costs and intangibles			416,621	247,468	180,608
Amortization of share-based unearned compensation			27,159	20,521	17,433
Non-cash amortization of terminated interest rate swaps			1,120	1,204	0
Allowance for (recovery of) doubtful accounts			6,304	(776)	1,602
Amortization of deferred financing costs			11,537	10,634	9,908
Loss (gain) on early extinguishment of debt			1,568	(1,990)	1,011
Amortization of debt discount/premium			3,538	2,992	2,616
Amortization of acquired above-market leases and acquired below-market leases, net			26,530	1,770	(8,351)
Changes in assets and liabilities, net of impact of business combinations
Accounts and other receivables			(21,318)	(73,717)	(13,754)
Deferred rent			(39,905)	(16,564)	(24,401)
Deferred leasing costs			(72,104)	(15,363)	60
Other assets			(9,145)	(1,800)	(69,924)
Accounts payable and other accrued liabilities			39,192	(16,384)	38,432
Security deposits and prepaid rents			(27,227)	16,102	24,677
Net cash provided by operating activities			1,385,324	1,023,305	911,242
Cash flows from investing activities:
Improvements to and advances for investments in real estate			(1,325,162)	(1,150,619)	(758,081)
Ascenty acquisition			(1,679,830)	0	0
Cash assumed in business combinations			116,000	20,650	0
Acquisitions of real estate, net of cash acquired			(410,712)	(415,764)	(873,285)
Proceeds from sale of assets, net of sales costs			286,204	89,333	359,319
Distribution of debt proceeds from closing of joint venture			0	135,793	0
Investments in unconsolidated joint ventures			(673)	(93,405)	0
Excess proceeds from forward contract settlement			0	63,956	0
Prepaid construction costs and other investments			(13,254)	0	(32,095)
Improvement advances to tenants			(48,502)	(50,857)	(16,239)
Collection of advances from tenants for improvements			39,936	43,760	16,784
Net cash used in investing activities			(3,035,993)	(1,357,153)	(1,303,597)
Cash flows from financing activities:
Borrowings on global revolving credit facility			3,046,245	2,180,556	2,533,507
Repayments on global revolving credit facility			(1,945,594)	(2,304,686)	(3,283,087)
Borrowings on unsecured term loans			467,922	0	766,201
Repayments on unsecured term loans			(674,332)	(371,520)	(170,736)
Borrowings on unsecured senior notes			1,169,006	2,265,060	675,591
Principal payments on unsecured senior notes			0	(884,841)	0
Borrowings on secured debt			600,000	104,000	0
Principal payments on secured debt			(594)	(105,546)	(299,826)
Repayments on other secured loans			0	(50,000)	(25,000)
Earnout payments related to acquisitions			0	0	(23,213)
Payment of loan fees and costs			(44,299)	(16,830)	(19,574)
Capital contributions from (distributions to) noncontrolling interests in consolidated joint ventures, net			66,124	(8,593)	(527)
Taxes paid related to net settlement of stock-based compensation awards			(5,055)	0	0
General partner contributions			7,068	228,809	802,671
Proceeds from forward swap contract			1,560	0	0
Payment of dividends to preferred stockholders/unitholders			(81,316)	(68,802)	(83,771)
Payment of distributions to common stockholders/unitholders			(849,466)	(646,407)	(521,619)
Net cash provided by financing activities			1,757,269	321,200	350,617
Net increase (decrease) in cash, cash equivalents and restricted cash			106,600	(12,648)	(41,738)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			15,441	3,793	(11,288)
Cash, cash equivalents and restricted cash at beginning of year			13,181	22,036	75,062
Cash, cash equivalents and restricted cash at end of year	135,222	13,181	135,222	13,181	22,036
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized			288,643	211,549	216,713
Cash paid for income taxes			11,224	9,456	3,698
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments			(11,736)	28,709	(86,621)
Accrual of dividends and distributions			217,241	199,761	144,194
Increase (decrease) in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps			8,197	(3,434)	41,998
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses			189,508	149,548	128,531
Assumption of capital lease obligations upon acquisition			75,030	0	118,923
Non-cash derecognition of capital lease obligation			17,294	0	0
Allocation of purchase price of real estate/investment in partnership to:
Investments in real estate			410,712	366,105	378,431
Accounts receivable			0	0	8,537
Goodwill			0	0	448,123
Acquired above-market leases			0	21,043	0
Acquired in-place lease value and deferred leasing costs			0	30,111	226,877
Other assets			0	0	9,011
Capital lease obligations			0	0	(118,923)
Acquired below-market leases			0	(1,495)	(922)
Accounts payables and other accrued liabilities			0	0	(69,084)
Security deposits and prepaid rents			0	0	(8,765)
Cash paid for acquisition of real estate			410,712	415,764	873,285
Allocation of purchase price to business combinations:
Goodwill	4,348,007	3,389,595	4,348,007	3,389,595
Noncontrolling interests in consolidated joint ventures	(93,056)	(2,243)	(93,056)	(2,243)
Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Cash and cash equivalents	116,000	20,650	116,000	20,650
Land	0	312,579	0	312,579
Buildings and improvements	425,000	3,677,497	425,000	3,677,497
Accounts receivables and other assets	30,000	10,978	30,000	10,978
Tenant relationship and acquired in-place lease value	495,000	1,582,385	495,000	1,582,385
Goodwill	982,667	2,592,181	982,667	2,592,181
Accounts payable and other accrued liabilities	(90,000)	(248,259)	(90,000)	(248,259)
Acquired below-market leases	0	(185,543)	0	(185,543)
Other working capital, net	0	(22,640)	0	(22,640)
Redeemable noncontrolling interests -- operating partnership	0	(66,259)	0	(66,259)
Noncontrolling interests in consolidated joint ventures	(25,000)	0	(25,000)	0
Total Stockholders’ Equity
Cash flows from operating activities:
Net income				248,259	426,187
Allocation of purchase price to business combinations:
Issuance of preferred stock in connection with merger			(1,194)	(211,897)	$ (1,085,444)
Total Stockholders’ Equity | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Common stock issued in connection with merger			0	(5,247,558)
Total Stockholders’ Equity | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Common stock issued in connection with merger			0	(5,247,558)
Common Unit | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Common stock issued in connection with merger			(253,837)	(676,566)
Preferred Stock | Series C Preferred Stock and Unit | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Issuance of preferred stock in connection with merger			0	(219,250)
Cash consideration			1,679,830	0
Preferred Stock | Series C Preferred Stock and Unit | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Cash consideration			1,679,830	0
Series C Preferred Units | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Issuance of preferred stock in connection with merger			0	(219,250)
Global revolving credit facilities | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Long term debt	0	(450,697)	0	(450,697)
Global revolving credit facilities | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Long term debt	0	(450,697)	0	(450,697)
Unsecured term loan | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Long term debt	0	(250,000)	0	(250,000)
Unsecured term loan | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Long term debt	0	(250,000)	0	(250,000)
Senior notes | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Long term debt	0	(886,831)	0	(886,831)
Senior notes | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Long term debt	0	(886,831)	0	(886,831)
Mortgage loans | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Long term debt	0	(105,000)	0	(105,000)
Mortgage loans | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Long term debt	0	(105,000)	0	(105,000)
Acquired above-market leases | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Acquired above-market leases	0	162,333	0	162,333
Acquired above-market leases | Digital Realty Trust, L.P. | Acquisitions Through December 31, 2018
Allocation of purchase price to business combinations:
Acquired above-market leases	$ 0	$ 162,333	$ 0	162,333
Corporate Joint Venture
Contribution of assets and liabilities to unconsolidated joint venture:
Investments in real estate				119,106
Other assets				16,700
Other liabilities				(31,634)
Corporate Joint Venture | Digital Realty Trust, L.P.
Contribution of assets and liabilities to unconsolidated joint venture:
Investments in real estate				119,106
Other assets				16,700
Other liabilities				$ (31,634)

Organization and Description of

Organization and Description of Business	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	Organization and Description of Business Digital Realty Trust, Inc. through its controlling interest in Digital Realty Trust, L.P. (the Operating Partnership) and the subsidiaries of the Operating Partnership (collectively, we, our, us or the Company) is 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, 2018 and 2017 is as follows: Data Centers As of December 31, 2018 As of December 31, 2017 Region Operating Held for Sale Unconsolidated Joint Ventures Total Operating Held for Sale Unconsolidated Joint Ventures Total United States 131 — 14 145 131 (2 ) 7 14 152 Europe 38 — — 38 38 — — 38 Latin America 16 (1 ) — 16 — — — — Asia 3 — 4 7 3 — 4 7 Australia 5 — — 5 5 — — 5 Canada 3 — — 3 3 (2 ) — — 3 Total 196 — 18 214 180 7 18 205 (1) Includes 16 data centers acquired as part of the Ascenty Acquisition, eight of which are under construction. (2) Includes 15 data centers acquired as part of the merger with DuPont Fabros Technology, Inc., of which 14 are located in the United States and one is located in Canada. On December 20, 2018, the Operating Partnership and 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 $1.8 billion , net of cash purchased. We refer to this transaction as the Ascenty Acquisition. Separately, we entered into an independent bilateral equity commitment letter with Brookfield Infrastructure, an affiliate of Brookfield Asset Management, one of the largest owners and operators of infrastructure assets globally, under which Brookfield has committed to fund approximately $700 million (unaudited), excluding Brookfield's share of transaction costs, in exchange for 49% of the total equity interests in a joint venture entity expected to ultimately own Ascenty. The agreement with Brookfield is subject to certain closing conditions and is expected to close in the first quarter of 2019. 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 and São Paulo metropolitan areas in Latin America, and the Hong Kong, Melbourne, Osaka, 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, 2018 , Digital Realty Trust, Inc. owns a 95.1% common interest and a 100.0% preferred interest in the Operating Partnership. As of December 31, 2017 , Digital Realty Trust, Inc. owned a 96.0% common interest and a 100.0% preferred interest in the Operating Partnership. As sole general partner of the Operating Partnership, Digital Realty Trust, Inc. has the full, exclusive and complete responsibility for the Operating Partnership’s day-to-day management and control. The limited partners of the Operating Partnership do not have rights to replace Digital Realty Trust, Inc. as the general partner nor do they have participating rights, although they do have certain protective rights.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	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, 2018 and 2017 , cash equivalents consist of investments in money market instruments. Financial instruments which potentially subject the Company to concentration of credit risk consist of cash and cash equivalents held in denominations subject to economic uncertainty and exchange rate volatility, such as Brazil. (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, whereby our investment is increased for capital contributed and our share of the joint venture's net income and decreased by distributions we receive and our share of any losses of the joint ventures. 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. The amortization of this difference was immaterial for each of the years ended December 31, 2018 , 2017 and 2016 . (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 real estate investment’s use and eventual disposition and compare that estimate to the carrying value of the property. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If our future undiscounted net cash flow evaluation indicates that we are unable to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property. These losses have a direct impact on our net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results in future periods. Since cash flows on properties considered to be long-lived assets to be held and used are considered on an undiscounted basis to determine whether the carrying value of a property is recoverable, our strategy of holding properties over the long-term directly decreases the likelihood of their carrying values not being recoverable and therefore requiring the recording of an impairment loss. If our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized and such loss could be material. If we determine that the asset fails the recoverability test, the affected assets must be reduced to their fair value. We generally estimate the fair value of rental properties utilizing a discounted cash flow analysis that includes projections of future revenues, expenses and capital improvement costs that a market participant would use based on the highest and best use of the asset, which is similar to the income approach that is commonly utilized by appraisers. In certain cases, we may supplement this analysis by obtaining outside broker opinions of value. In considering whether to classify a property as held for sale, the Company considers whether: (i) management has committed to a plan to sell the property; (ii) the property is available for immediate sale in its present condition; (iii) the Company has initiated a program to locate a buyer; (iv) the Company believes that the sale of the property is probable; (v) the Company is actively marketing the property for sale 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. Upon being classified as held for sale, the Company ceases all depreciation and amortization related to the property and it is recorded at the lower of its carrying amount or fair value less cost to sell. The assets and related liabilities of the property are classified separately on the consolidated balance sheets for the most recent reporting period. Only those assets held for sale 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 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 value of the real estate acquired is allocated to the acquired tangible assets, consisting primarily of land, building and tenant improvements, and identified intangible assets and liabilities, consisting of the value of above-market and below-market leases, value of in-place leases and acquired ground leases and in the case of a business combination, tenant relationship value, based in each case on their fair values. Loan premiums, in the case of above-market rate loans, or loan discounts, in the case of below-market loans, are recorded based on the fair value of any loans assumed in connection with acquiring the real estate. 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. 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. We estimate the fair value of the reporting unit using discounted cash flows. 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 exchange rates. The following is a summary of goodwill activity for the year ended December 31, 2018 (in thousands): Balance as of December 31, 2017 Merger / Acquisition Impact of Change in Foreign Exchange Rates Balance as of December 31, 2018 Merger / Portfolio Acquisition 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 (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. Capitalized costs are allocated to the specific components of a project that are benefited. During the years ended December 31, 2018 , 2017 and 2016 , we capitalized interest of approximately $34.7 million , $21.7 million and $16.3 million , respectively. During the years ended December 31, 2018 , 2017 and 2016 , we capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $74.1 million , $77.3 million and $70.7 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. 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 $322.2 million and $330.9 million , net of accumulated amortization, as of December 31, 2018 and 2017 , respectively. Amortization expense on leasing costs was approximately $72.9 million , $50.1 million , and $43.8 million for the years ended December 31, 2018 , 2017 and 2016 , 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 14) granted by us is being amortized on a straight-line basis over the expected service period. The fair value of share-based compensation awards that contain a market condition is measured using a Monte Carlo simulation method and not adjusted based on actual achievement of the 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 15 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 federal corporate income tax to the extent taxable income is currently distributed to its stockholders. If Digital Realty Trust, Inc. fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax 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 and foreign income taxes to the extent there is taxable income. Accordingly, the Company recognizes current and deferred income taxes. 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, 2018 and 2017 , 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, 2018 , 2017 and 2016 , we had no such interest or penalties. The tax year 2015 and thereafter remain open to examination by the major taxing jurisdictions with which the Company files tax returns. See Note 11 for further discussion on income taxes. (q) 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. (r) 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. (s) Revenue Recognition In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)", and since that date has issued several additional ASUs intended to clarify certain aspects of ASU No. 2014-09 and to provide for certain practical expedients entities may elect upon adoption. Collectively, these ASUs outline a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers. 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

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business Combinations	Business Combinations (a) 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 are provisional estimates, but are based on the best information currently available. Since the acquisition closed so late in the year, we have not been able to obtain all of the necessary information to complete the valuation of each of the assets and liabilities due to the time needed to obtain all of the source documents, translate into English, obtain market data information in Brazil, and adequately review and evaluate the information. These provisional estimates are subject to change as we complete all remaining steps in finalizing the purchase price allocation, and it is reasonably possible that, there could be significant changes to the preliminary values below. We expect to finalize the valuation of all assets and liabilities by March 31, 2019. 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. As the purchase price allocation is still provisional, the Company can not estimate the amount of the goodwill that may be deductible for federal income tax purposes. 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. We expect to finalize the permanent capital structure for Ascenty in the first quarter of 2019, in conjunction with closing the joint venture with Brookfield. (b) DFT Merger We completed the acquisition of DFT on September 14, 2017. A summary of the fair value of the assets and liabilities acquired for total equity of approximately $6.2 billion is as follows (in thousands): Fair Value Weighted Average Remaining Intangible Amortization Life (in months) Land $ 312,579 Buildings and improvements 3,677,497 Cash and cash equivalents 20,650 Accounts and other receivables 10,978 Acquired above-market leases 162,333 47 Goodwill 2,592,181 Acquired in-place lease value, deferred leasing costs and intangibles: Tenant relationship value 980,267 220 Acquired in-place lease value 557,128 70 Tenant origination costs 44,990 80 Global revolving credit facility, net (1) (450,697 ) Unsecured term loans (1) (250,000 ) Unsecured senior notes, net (2) (886,831 ) Mortgage loans (1) (105,000 ) Acquired below-market leases (185,543 ) 137 Accounts payable and other accrued liabilities (248,259 ) Other working capital, net (22,640 ) Total equity consideration for DFT merger $ 6,209,633 (1) Debt was paid off in full at closing of the DFT merger. (2) Approximately $621 million of fair value debt was paid off prior to September 30, 2017. The remainder was paid off in October 2017. 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 merger. The strategic benefits of the merger include the Company’s ability to grow its presence in strategic, high-demand metropolitan areas with strong growth prospects, expand our hyper-scale product offering and further enhance the credit quality of our existing customer base. These factors contributed to the goodwill that was recorded upon consummation of the transaction. The Company does not believe that any of the goodwill recorded as a result of the DFT merger will be deductible for federal income tax purposes. The unaudited pro forma financial information set forth below is based on our historical consolidated income statements for the years ended December 31, 2017 and 2016, adjusted to give effect to the DFT Merger as if it occurred on January 1, 2016. The pro forma adjustments primarily relate to transaction expenses, depreciation expense on acquired buildings and improvements, amortization of acquired intangibles, and estimated interest expense related to financing transactions, the proceeds of which were used to fund the repayment of DFT debt in connection with the DFT merger. Digital Realty Trust, Inc. Pro forma (unaudited) (in thousands, except per share data) Year Ended December 31, 2017 2016 Total revenue $ 2,860,454 $ 2,670,914 Net income available to common stockholders (1) $ 51,717 $ 99,653 Income per share, diluted (2) $ 0.25 $ 0.51 Digital Realty Trust, L.P. Pro forma (unaudited) (in thousands, except per unit data) Year Ended December 31, 2017 2016 Total revenue $ 2,860,454 $ 2,670,914 Net income available to common unitholders (1) $ 53,786 $ 103,639 Income per unit, diluted (2) $ 0.25 $ 0.51 (1) Pro forma net income available to common stockholders was adjusted to exclude $43.0 million of merger-related costs incurred by the Company during the year ended December 31, 2017 and to include these charges in 2016. (2) Adjusted to give effect to the issuance of approximately 43.2 million shares of Digital Realty Trust, Inc. common stock in the DFT merger. The Company recorded transaction expenses of approximately $43.0 million in the accompanying 2017 consolidated income statement in connection with the DFT merger. Revenues of approximately $177.8 million and net income of approximately $5.4 million associated with properties acquired in the DFT merger are included in the consolidated income statement for the year ended December 31, 2017.

Investments in Real Estate

Investments in Real Estate	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Investments in Real Estate	Investments in Real Estate A summary of our investments in properties as of December 31, 2018 and 2017 is as follows: As of December 31, 2018 (in thousands) Property Type Land Acquired Buildings and Tenant Accumulated Net Internet Gateway Data Centers $ 101,964 $ — $ 2,137,458 $ 114,013 $ (885,315 ) $ 1,468,120 Data Centers (2) 1,391,585 10,575 14,502,437 460,247 (3,016,646 ) 13,348,198 Technology Manufacturing 11,959 — 1,582 76 (100 ) 13,517 Technology Office 2,091 — 23,104 — (18,441 ) 6,754 Other 2,165 — 80,629 — (14,765 ) 68,029 $ 1,509,764 $ 10,575 $ 16,745,210 $ 574,336 $ (3,935,267 ) $ 14,904,618 As of December 31, 2017 (in thousands) Property Type Land Acquired Buildings and Tenant Accumulated Net Internet Gateway Data Centers $ 109,844 $ — $ 1,940,495 $ 99,174 $ (778,659 ) $ 1,370,854 Data Centers (2) 1,010,306 11,150 13,147,042 453,712 (2,430,984 ) 12,191,226 Technology Manufacturing 11,959 — 1,564 76 (31 ) 13,568 Technology Office 2,067 — 23,029 — (16,779 ) 8,317 Other 2,165 — 103,275 78 (11,774 ) 93,744 $ 1,136,341 $ 11,150 $ 15,215,405 $ 553,040 $ (3,238,227 ) $ 13,677,709 (1) Balances include, as of December 31, 2018 and 2017 , $1.6 billion and $1.4 billion of direct and accrued costs associated with development in progress, respectively. (2) Balances include vacant land to support ground-up development. As of December 31, 2017 , we had identified eight properties that met the criteria to be classified as held for sale. As of December 31, 2017 , the eight properties had an aggregate carrying value of $139.5 million within total assets and $5.0 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, respectively. All eight properties were sold during the year ended December 31, 2018 . The properties were not representative of a significant component of our portfolio, nor did the sales represent a significant shift in our strategy. In addition, we evaluated the carrying value of the properties identified as held for sale to ensure the carrying value is recoverable in light of a potentially shorter holding period. As a result of our evaluation, during the year ended December 31, 2017 , we recognized approximately $29.0 million of impairment charges on three properties located in the United States to reduce the carrying values to the estimated fair values less costs to sell. The fair values of the three properties were based on comparable sales price data (Level 2 under the fair value hierarchy). There were no impairment charges for the years ended December 31, 2018 and 2016 . Acquisitions We acquired the following real estate during the years ended December 31, 2018 and 2017 (excluding business combinations already discussed in Note 3): 2018 Acquisitions Property Type Amount (2) Land Parcels (1) $ 296.1 Data Centers 114.6 $ 410.7 2017 Acquisitions Property Type Amount (2) Land Parcels (1) $ 55.3 Data Centers 346.2 Technology Manufacturing 14.3 $ 415.8 (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. Each of these acquisitions was accounted for as an asset acquisition pursuant to the adoption of ASU 2017-01 on January 1, 2017. The table below reflects the purchase price allocation for the above properties acquired in 2018 and 2017 (in thousands): Property Type Land Buildings and Improvements Tenant Improvements Above-Market Leases In-Place Leases Below-Market Leases Acquisition Date Fair Value 2018 Land Parcels $ 296,071 $ — $ — $ — $ — $ — $ 296,071 Data Centers 60,633 54,008 — — — — 114,641 Total $ 356,704 $ 54,008 $ — $ — $ — $ — $ 410,712 2017 Land Parcels $ 55,229 $ — $ — $ — $ — $ — $ 55,229 Data Centers 20,431 275,374 1,506 21,043 28,656 (811 ) 346,199 Technology Manufacturing 11,950 1,539 76 — 1,455 (684 ) 14,336 Total $ 87,610 $ 276,913 $ 1,582 $ 21,043 $ 30,111 $ (1,495 ) $ 415,764 Weighted average remaining intangible amortization life (in months) 65 81 80 Dispositions We sold the following real estate properties during the years ended December 31, 2018 and 2017 : 2018 Dispositions Location Metro Area Date Sold Gross Proceeds (in millions) Gain (loss) on sale (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 2017 Dispositions Location Metro Area Date Sold Gross Proceeds (in millions) Gain on Sale (in millions) 8025 North Interstate 35 Austin August 10, 2017 $ 20.2 $ 9.6 44874 Moran Road (1) Northern Virginia October 6, 2017 34.0 15.6 1 Solutions Parkway St. Louis November 28, 2017 37.1 14.7 $ 91.3 $ 39.9 (1) The property was held in a consolidated joint venture in which the Company owned a 75% interest. The Company recognized a gain on the sale of approximately $11.7 million , net of noncontrolling interests.

Investments in Unconsolidated J

Investments in Unconsolidated Joint Ventures	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Joint Ventures	Investments in Unconsolidated Joint Ventures As of December 31, 2018 , our investments in unconsolidated joint ventures consist of effective: 50% interests in four joint ventures that own data center buildings in Seattle, Hong Kong, Tokyo, and Osaka; 20% interests in two joint ventures, one of which owns 10 data center properties with an investment fund managed by Prudential Real Estate Investors (PREI®) and the other which owns one data center property with an affiliate of Griffin Capital Essential Asset REIT, Inc. (GCEAR) and a 17% interest in a joint venture that owns a data center property at 1101 Space Park Drive in Santa Clara. On November 1, 2017, the Company formed a joint venture with Mitsubishi Corporation to provide data center solutions in Japan. The Company contributed its recently completed data center development project in Osaka, cash and working capital for a 50% interest in the joint venture. The Mitsubishi Corporation contributed two existing data center facilities in the western Tokyo suburb of Mitaka for the remaining 50% interest. The following tables present summarized financial information for our joint ventures for the years ended December 31, 2018 , 2017 , and 2016 (in thousands): 2018 % Net Investment Total Mortgage Total Equity / Revenues Property Net Net 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 33 Chun Choi Street (Hong Kong) 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 ) 1101 Space Park Drive 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 2017 % Net Investment Total Mortgage Total Equity / Revenues Property Net Net 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 33 Chun Choi Street (Hong Kong) 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 ) 1101 Space Park Drive 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 2016 % Net Investment Total Mortgage Total Equity / Revenues Property Net Net Unconsolidated Joint Ventures 2001 Sixth Avenue 50.00 % $ 27,342 $ 43,258 $ 101,394 $ 106,241 $ (62,983 ) $ 45,518 $ (15,574 ) $ 29,944 $ 16,374 2020 Fifth Avenue 50.00 % 45,973 55,005 47,000 47,612 7,393 8,788 (1,500 ) 7,288 4,821 33 Chun Choi Street (Hong Kong) 50.00 % 134,249 184,855 — 3,291 181,564 18,856 (6,636 ) 12,220 6,315 PREI ® 20.00 % 409,876 468,298 207,270 288,325 179,973 41,075 (8,503 ) 32,572 13,615 GCEAR 20.00 % 116,949 162,863 101,477 104,393 58,470 19,742 (7,808 ) 11,934 (1,396 ) 1101 Space Park Drive 17.00 % 6,839 8,415 — 135 8,280 3,539 (4,105 ) (566 ) (1,515 ) Total Unconsolidated Joint Ventures $ 741,228 $ 922,694 $ 457,141 $ 549,997 $ 372,697 $ 137,518 $ (44,126 ) $ 93,392 $ 38,214 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 106,402 $ 17,104 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 are non-recourse to us, except for customary exceptions pertaining to such matters as intentional misuse of funds, environmental conditions, and material misrepresentations. Differences between the Company’s investments in the joint ventures and the amount of the underlying equity in net assets of the joint ventures are due to basis differences resulting from the Company’s equity investment recorded at its historical basis versus the fair value of the Company’s contributed interest in the joint ventures. Our proportionate share of the earnings or losses related to these unconsolidated joint ventures is reflected as equity in earnings of unconsolidated joint ventures on the accompanying consolidated income statements.

Acquired Intangible Assets and

Acquired Intangible Assets and Liabilities	12 Months Ended
	Dec. 31, 2018
Acquired Intangible Assets And Liabilities [Abstract]
Acquired Intangible Assets and Liabilities	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, 2018 and 2017 . Balance as of (Amounts in thousands) December 31, 2018 December 31, 2017 Acquired in-place lease value: Gross amount $ 1,569,401 $ 1,473,515 Accumulated amortization (795,033 ) (613,948 ) Net $ 774,368 $ 859,567 Tenant relationship value: Gross amount $ 2,339,606 $ 1,978,277 Accumulated amortization (291,818 ) (169,919 ) Net $ 2,047,788 $ 1,808,358 Acquired above-market leases: Gross amount $ 277,796 $ 294,514 Accumulated amortization (158,037 ) (110,139 ) Net $ 119,759 $ 184,375 Acquired below-market leases: Gross amount $ 442,535 $ 469,119 Accumulated amortization (242,422 ) (219,654 ) Net $ 200,113 $ 249,465 Amortization of acquired below-market lease value, net of acquired above-market lease value, resulted in a change in rental revenues of $(27.3) million , $(2.2) million and $8.3 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. The expected average remaining lives for acquired below-market leases and acquired above-market leases is 8.1 years and 2.8 years , respectively, as of December 31, 2018 . 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, 2019 is as follows: (Amounts in thousands) 2019 $ (15,323 ) 2020 (3,915 ) 2021 872 2022 7,898 2023 12,045 Thereafter 78,777 Total $ 80,354 Amortization of acquired in-place lease value (a component of depreciation and amortization expense) was $211.0 million , $101.2 million and $52.6 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. The expected average amortization period for acquired in-place lease value is 6.4 years as of December 31, 2018 . The weighted average remaining contractual life for acquired leases excluding renewals or extensions is 5.9 years as of December 31, 2018 . Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing January 1, 2019 is as follows: (Amounts in thousands) 2019 $ 158,095 2020 123,450 2021 98,916 2022 77,056 2023 65,518 Thereafter 251,333 Total $ 774,368 Amortization of tenant relationship value and trade names (a component of depreciation and amortization expense) was approximately $123.5 million and $0 , respectively, for the year ended December 31, 2018 , $85.9 million and $0 , respectively, for the year ended December 31, 2017 and $67.2 million and $6.9 million , respectively for the year ended December 31, 2016 . During the year ended December 31, 2016 , management of the Company decided to retire the Telx trade name. Accordingly, the Company wrote off the net remaining balance of approximately $6.1 million . The weighted average remaining contractual life for tenant relationship value is 14.8 years . Estimated annual amortization of tenant relationship value for each of the five succeeding years and thereafter, commencing January 1, 2019 is as follows: (Amounts in thousands) 2019 $ 143,818 2020 143,818 2021 143,818 2022 143,818 2023 143,818 Thereafter 1,328,698 Total $ 2,047,788

Debt of the Company

Debt of the Company	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt of the Company	Debt of the Company In this Note 7, 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 5.875% notes due 2020 ( 5.875% 2020 Notes), 3.400% notes due 2020 ( 3.400% 2020 Notes), 5.250% notes due 2021 (2021 Notes), 3.950% notes due 2022 ( 3.950% 2022 Notes) , 3.625% notes due 2022 ( 3.625% 2022 Notes), 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) and 4.450% notes due 2028 (2028 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) and Floating Rate Guaranteed Notes due 2019 (2019 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, 2018
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Debt of the Operating Partnership	Debt of the Operating Partnership A summary of outstanding indebtedness of the Operating Partnership as of December 31, 2018 and 2017 is as follows (in thousands): Indebtedness Interest Rate at December 31, 2018 Maturity Date Principal Outstanding December 31, 2018 Principal Outstanding December 31, 2017 Global revolving credit facilities Various (1) Jan 24, 2023 (1) $ 1,663,156 (2) $ 558,191 (2) Deferred financing costs, net (15,421 ) (7,245 ) Global revolving credit facilities, net 1,647,735 550,946 Unsecured Term Loans 2019 Term Loan Base Rate + 1.000% Dec 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 508,120 (5) 1,125,117 (5) Deferred financing costs, net (4,216 ) (4,784 ) Unsecured term loans, net 1,178,904 1,420,333 Unsecured senior notes: Senior Notes: Floating rate notes due 2019 EURIBOR + 0.500% May 22, 2019 143,338 (6) 150,063 (6) 5.875% notes due 2020 5.875% Feb 1, 2020 500,000 500,000 3.400% notes due 2020 3.400% Oct 1, 2020 500,000 500,000 5.250% notes due 2021 5.250% Mar 15, 2021 400,000 400,000 3.950% notes due 2022 3.950% Jul 1, 2022 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 382,620 (7) 405,390 (7) 2.625% notes due 2024 2.625% Apr 15, 2024 688,020 (6) 720,300 (6) 2.750% notes due 2024 2.750% Jul 19, 2024 318,850 (7) 337,825 (7) 4.250% notes due 2025 4.250% Jan 17, 2025 510,160 (7) 540,520 (7) 4.750% notes due 2025 4.750% Oct 1, 2025 450,000 450,000 3.700% notes due 2027 3.700% Aug 15, 2027 1,000,000 1,000,000 4.450% notes due 2028 4.450% Jul 15, 2028 650,000 — 3.300% notes due 2029 3.300% Jul 19, 2029 446,390 (7) 472,955 (7) 3.750% notes due 2030 3.750% Oct 17, 2030 510,160 (7) — Unamortized discounts (19,859 ) (18,508 ) Total senior notes, net of discount 7,629,679 6,608,545 Deferred financing costs, net (40,553 ) (37,788 ) Total unsecured senior notes, net of discount and deferred financing costs 7,589,126 6,570,757 Secured debt: 731 East Trade Street 8.22% Jul 1, 2020 1,776 2,370 Secured note due December 2023 Base Rate + 4.250% Dec 20, 2023 104,000 104,000 Secured note due March 2023 LIBOR + 1.100% (4) Mar 1, 2023 600,000 — Unamortized net premiums 148 241 Total secured debt, including premiums 705,924 106,611 Deferred financing costs, net (20,210 ) (29 ) Total secured debt, including premiums and net of deferred financing costs 685,714 106,582 Total indebtedness $ 11,101,479 $ 8,648,618 (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, 2018 and December 31, 2017 are as follows (balances, in thousands): Denomination of Draw Balance as of December 31, 2018 Weighted-average Balance as of December 31, 2017 Weighted-average Global Revolving Credit Facility Floating Rate Borrowing (a) U.S. dollar ($) $ 890,000 3.37 % $ 400,000 2.48 % British pound sterling (£) 8,290 (c) 1.61 % 18,918 (d) 1.50 % Euro (€) 451,800 (c) 0.90 % 31,213 (d) 0.62 % Australian dollar (AUD) 27,632 (c) 2.82 % — — % Hong Kong dollar (HKD) 8,797 (c) 3.14 % 4,100 (d) 2.20 % Japanese yen (JPY) 4,105 (c) 0.90 % 65,890 (d) 0.96 % Singapore dollar (SGD) 77,112 (c) 2.79 % — — % Canadian dollar (CAD) 60,856 (c) 3.16 % 23,070 (d) 2.36 % Total $ 1,528,592 2.57 % $ 543,191 2.15 % Base Rate Borrowing (b) U.S. dollar ($) $ — — % $ 15,000 4.50 % Total borrowings $ 1,528,592 2.57 % $ 558,191 2.21 % Yen Revolving Credit Facility 134,564 (c) 0.50 % — — % Total borrowings $ 1,663,156 2.41 % $ 558,191 2.21 % (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. (b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate. (c) Based on exchange rates of $1.28 to £1.00, $1.15 to €1.00 , $0.78 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) Based on exchange rates $1.23 to £1.00, of $1.35 to €1.00 , $0.78 to 1.00 HKD, $0.13 to 1.00 JPY, $0.69 to 1.00 SGD and $0.80 to 1.00 CAD, respectively, as of December 31, 2017 . (3) Interest rates are based on our current senior unsecured debt ratings and is currently 100 basis points over the applicable index for floating rate advances for the 2023 Term Loan and the 2024 Term Loan. (4) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by the U.S. dollar and Canadian dollar borrowings under the global revolving credit facility and unsecured term loan. See Note 15. "Derivative Instruments" for further information. (5) Balances as of December 31, 2018 and December 31, 2017 are as follows (balances, in thousands): Denomination of Draw Balance as of December 31, 2018 Weighted-average Balance as of December 31, 2017 Weighted-average U.S. dollar ($) $ 300,000 3.46 % (b) $ 606,911 2.78 % (d) British pound sterling (£) — — % 229,011 (c) 1.59 % (d) Singapore dollar (SGD) 146,080 (a) 2.76 % 233,788 (c) 2.17 % Australian dollar (AUD) 204,632 (a) 2.94 % 179,841 (c) 2.79 % Hong Kong dollar (HKD) 85,188 (a) 3.32 % 85,762 (c) 2.20 % Canadian dollar (CAD) 72,220 (a) 3.24 % (b) 78,357 (c) 2.44 % (d) Japanese yen (JPY) — — % 11,447 (c) 1.05 % Total $ 808,120 3.17 % (b) $ 1,425,117 2.42 % (d) (a) 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 . (b) 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 15 for further discussion on interest rate swaps. (c) Based on exchange rates of $1.23 to £1.00 , $0.75 to 1.00 SGD, $0.78 to 1.00 AUD, $0.13 to 1.00 HKD, $0.74 to 1.00 CAD and $0.01 to 1.00 JPY, respectively, as of December 31, 2017 . (d) As of December 31, 2017 , the weighted-average interest rate reflecting interest rate swaps was 2.72% (U.S. dollar), 1.89% (British pound sterling), 1.88% (Canadian dollar) and 2.41% (Total). See Note 15 for further discussion on interest rate swaps. (6) Based on exchange rates of $1.15 to €1.00 as of December 31, 2018 and $1.20 to €1.00 as of December 31, 2017 . (7) Based on exchange rates of $1.28 to £1.00 as of December 31, 2018 and $1.35 to £1.00 as of December 31, 2017 . 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, 2018 , interest rates are based on 1-month LIBOR, 1-month GBP LIBOR, 1-month EURIBOR, 1-month HIBOR, 1-month JPY LIBOR, 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. As of December 31, 2018 , approximately $44.5 million of letters of credit were issued. 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, 2018 , 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, 2018 , 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, 2018 , 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, 2018 , we were in compliance with all of such covenants. Senior Notes Senior Notes and Annual Interest Rate Date Issued Maturity Date Amount Issued (in millions, local currency) Net Proceeds (in millions) (1) Interest Payment Dates Initial Issuer (2) Floating Rate Guaranteed Notes due 2019 (5) May 22, 2017 May 22, 2019 € 125.0 $ 140.1 Quarterly, commencing August 22, 2017 Digital Euro Finco, LLC (3) 5.875% Notes due 2020 Jan 28, 2010 Feb 1, 2020 $ 500.0 487.1 Semi-annually, commencing August 1, 2010 Digital Realty Trust, L.P. 3.400% Notes due 2020 Oct 1, 2015 Oct 1, 2020 $ 500.0 494.5 Semi-annually, commencing April 1, 2016 Digital Delta Holdings, LLC (4) 5.250% Notes due 2021 Mar 8, 2011 Mar 15, 2021 $ 400.0 395.5 Semi-annually, commencing September 15, 2011 Digital Realty Trust, L.P. 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) 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. 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. 3.300% 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 Oct 17, 2030 £ 400.0 516.1 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 3.400% 2020 Notes, the 4.750% 2025 Notes, the related indenture and registration rights agreement by operation of law. (5) The 2019 Notes bear interest at a rate per annum, reset quarterly, equal to three-month EURIBOR plus 0.50% (currently 0.18% ). 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, 2018 , we were in compliance with each of these financial covenants. Ascenty Acquisition Financing On December 19, 2018, the Operating Partnership entered into a term loan agreement, with Digital Realty Trust, Inc. as the parent guarantor, which we refer to as the Ascenty term loan agreement, which governs a $375.0 million 1 -year senior unsecured term loan, which we refer to as the 2019 Term Loan. The 2019 Term Loan matures on December 19, 2019 with one six -month extension option. Interest rates equals the applicable index plus a margin of 100 basis points, which is based on the current credit ratings of our senior unsecured debt (effective rate of 3.47% as of December 31, 2018 ). On December 20, 2018, our Brazilian subsidiary entered into a non-recourse credit agreement for up to $775.0 million in the aggregate, which consists of a $600.0 million 5 -year secured term loan, which we refer to as the December 2023 Secured Loan, plus a $125.0 million delayed draw term loan and a $50.0 million revolving credit facility. The December 2023 Secured Loan matures on December 20, 2023. The interest rate on the December 2023 Secured Loan equals the applicable index plus a margin of 425 basis points (effective rate of 7.04% as of December 31, 2018 ). The table below summarizes our debt maturities and principal payments as of December 31, 2018 (in thousands): Global Revolving Unsecured Senior Notes Secured Debt Total 2019 $ — $ 375,000 $ 143,338 $ 644 $ 518,982 2020 — — 1,000,000 1,132 1,001,132 2021 — — 400,000 120,000 520,000 2022 — — 800,000 150,000 950,000 2023 1,528,592 808,120 732,620 434,000 3,503,332 Thereafter 134,564 — 4,573,580 — 4,708,144 Subtotal $ 1,663,156 $ 1,183,120 $ 7,649,538 $ 705,776 $ 11,201,590 Unamortized discount — — (19,859 ) — (19,859 ) Unamortized premium — — — 148 148 Total $ 1,663,156 $ 1,183,120 $ 7,629,679 $ 705,924 $ 11,181,879 (1) Subject to two six -month extension options exercisable by us. The bank group is obligated to grant the extension options provided we give proper notice, we make certain representations and warranties and no default exists under the global revolving credit facility.

Income per Share

Income per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Income per Share	Income per Share The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts): Year Ended December 31, 2018 2017 2016 Net income available to common stockholders $ 249,930 $ 173,148 $ 332,088 Weighted average shares outstanding—basic 206,035,408 174,059,386 149,953,662 Potentially dilutive common shares: Stock options — — 9,726 Unvested incentive units 141,260 141,136 71,031 Forward equity offering 33,315 124,527 3,990 Market performance-based awards 463,488 570,049 641,279 Weighted average shares outstanding—diluted 206,673,471 174,895,098 150,679,688 Income per share: Basic $ 1.21 $ 0.99 $ 2.21 Diluted $ 1.21 $ 0.99 $ 2.20 We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Year Ended December 31, 2018 2017 2016 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 8,227,463 3,996,550 2,406,018 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock 1,876,584 540,773 — Potentially dilutive Series E Cumulative Redeemable Preferred Stock — — 2,880,254 Potentially dilutive Series F Cumulative Redeemable Preferred Stock — 463,301 1,939,905 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 2,326,861 2,261,153 2,652,503 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 3,409,772 3,313,484 3,886,966 Potentially dilutive Series I Cumulative Redeemable Preferred Stock 2,329,584 2,263,799 2,655,607 Potentially dilutive Series J Cumulative Redeemable Preferred Stock 1,858,622 720,803 — 20,028,886 13,559,863 16,421,253

Income per Unit

Income per Unit	12 Months Ended
	Dec. 31, 2018
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Income per Unit	Income per Unit The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts): Year Ended December 31, 2018 2017 2016 Net income available to common unitholders $ 260,110 $ 176,918 $ 337,386 Weighted average units outstanding—basic 214,312,871 178,055,936 152,359,680 Potentially dilutive common units: Stock options — — 9,726 Unvested incentive units 141,260 141,136 71,031 Forward equity offering 33,315 124,527 3,990 Market performance-based awards 463,488 570,049 641,279 Weighted average units outstanding—diluted 214,950,934 178,891,648 153,085,706 Income per unit: Basic $ 1.21 $ 0.99 $ 2.21 Diluted $ 1.21 $ 0.99 $ 2.20 We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive: Year Ended December 31, 2018 2017 2016 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units 1,876,584 540,773 — Potentially dilutive Series E Cumulative Redeemable Preferred Units — — 2,880,254 Potentially dilutive Series F Cumulative Redeemable Preferred Units — 463,301 1,939,905 Potentially dilutive Series G Cumulative Redeemable Preferred Units 2,326,861 2,261,153 2,652,503 Potentially dilutive Series H Cumulative Redeemable Preferred Units 3,409,772 3,313,484 3,886,966 Potentially dilutive Series I Cumulative Redeemable Preferred Units 2,329,584 2,263,799 2,655,607 Potentially dilutive Series J Cumulative Redeemable Preferred Units 1,858,622 720,803 — 11,801,423 9,563,313 14,015,235

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Digital Realty Trust, Inc. has elected to be treated and believes that it has been organized and has operated in a manner that has enabled it to qualify as a REIT for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. is generally not subject to corporate level federal income taxes on 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, 2018 , 2017 and 2016 . 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, 2018 , 2017 and 2016 . For our TRS entities and foreign subsidiaries that are subject to U.S. federal, state and foreign income taxes, deferred tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted tax rates expected to be in effect when the temporary differences reverse. A valuation allowance for deferred tax assets is provided if we believe it is more likely than not that the deferred tax asset may not be realized, based on available evidence at the time the determination is made. An increase or decrease in the valuation allowance that results from the change in circumstances that causes a change in our judgment about the realizability of the related deferred tax asset is included in the income statement. Deferred tax assets (net of valuation allowance) and liabilities for our TRS entities and foreign subsidiaries were accrued, as necessary, for the years ended December 31, 2018 , 2017 and 2016 . As of December 31, 2018 and 2017 , we had deferred tax liabilities net of deferred tax assets of approximately $146.6 million and $167.0 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, 2018 and 2017 relate primarily to net operating loss carryforwards attributable to certain foreign jurisdictions and from the acquisition of Telx, that we do not expect to utilize. Deferred income tax assets and liabilities as of December 31, 2018 and 2017 were as follows (in thousands): 2018 2017 Gross deferred income tax assets: Net operating loss carryforwards $ 71,656 $ 77,227 Basis difference - real estate property 8,490 48,983 Basis difference - intangibles 256 506 Other - temporary differences 24,341 40,220 Total gross deferred income tax assets 104,743 166,936 Valuation allowance (51,439 ) (46,302 ) Total deferred income tax assets, net of valuation allowance 53,304 120,634 Gross deferred income tax liabilities: Basis difference - real estate property 164,077 183,283 Basis difference - intangibles 6,855 65,920 Straight-line rent 5,340 1,597 Other - temporary differences 23,584 36,812 Total gross deferred income tax liabilities 199,856 287,612 Net deferred income tax liabilities $ 146,552 $ 166,978 The federal tax legislation enacted in December 2017, commonly known as the Tax Cuts and Jobs Act (the “2017 Tax Legislation”), reduced the corporate federal tax rate in the U.S. to 21%, generally effective January 1, 2018. As such, deferred tax assets and liabilities are 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 2017 Tax Legislation as a whole will have on us.

Equity and Accumulated Other Co

Equity and Accumulated Other Comprehensive Loss, Net	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Equity and Accumulated Other Comprehensive Loss, Net	Equity and Accumulated Other Comprehensive Loss, Net (a) Equity Distribution Agreements On June 29, 2011, Digital Realty Trust, Inc. entered into equity distribution agreements, which we refer to as the 2011 Equity Distribution Agreements, with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Credit Suisse Securities (USA) LLC, Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC, or the Agents, under which it could issue and sell shares of its common stock having an aggregate offering price of up to $400.0 million from time to time through, at its discretion, any of the Agents as its sales agents. The sales of common stock made under the 2011 Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act. To date, Digital Realty Trust, Inc. has generated net proceeds of approximately $342.7 million from the issuance of approximately 5.7 million common shares under the 2011 Equity Distribution Agreements at an average price of $60.35 per share after payment of approximately $3.5 million of commissions to the sales agents and before offering expenses. No sales were made under the program during the years ended December 31, 2018 and 2017 . As of December 31, 2018 , shares of common stock having an aggregate offering price of $53.8 million remained available for offer and sale under the program. The 2011 Equity Distribution Agreements were terminated in connection with the entry into the 2019 Equity Distribution Agreements (defined and discussed below) on January 4, 2019. 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, which is anticipated to be no later than September 27, 2019. On May 20, 2016, Digital Realty Trust, Inc. completed an underwritten public offering of 12,500,000 shares of its common stock, all of which were offered in connection with forward sale agreements it entered into with certain financial institutions acting as forward purchasers. On June 2, 2016, the underwriters exercised their option in full to purchase an additional 1,875,000 shares of Digital Realty Trust, Inc.’s common stock from the forward purchasers. The forward purchasers borrowed and sold an aggregate of 14,375,000 shares of Digital Realty Trust, Inc.’s common stock in the public offering. Digital Realty Trust, Inc. did not receive any proceeds from the sale of our common stock by the forward purchasers in the public offering. On September 27, 2016, we physically settled a portion of the forward sale agreements by issuing an aggregate of 12,000,000 shares of our common stock to the forward purchasers in exchange for net proceeds of approximately $1.1 billion . On May 19, 2017, we physically settled and issued the remaining 2,375,000 shares of our common stock to the forward purchasers in exchange for net proceeds of approximately $211.1 million . (c) Redeemable Preferred Stock Shares Outstanding as of December 31, Balance (in thousands, net of issuance costs) as of December 31, Preferred Stock (1) Date(s) Issued Initial Date to Redeem (2) Share Cap (3) Total Liquidation Value (in thousands) (4) Annual Dividend Rate (5) 2018 2017 2018 2017 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 365,000 1.84375 14,600,000 14,600,000 353,290 353,290 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 $ 1,266,250 50,650,000 50,650,000 $ 1,249,560 $ 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) and 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, 2018 and 2017 : December 31, 2018 December 31, 2017 Number of units Percentage of total Number of units Percentage of total Digital Realty Trust, Inc. 206,425,656 95.1 % 205,470,300 96.0 % Noncontrolling interests consist of: Common units held by third parties 6,297,272 2.9 % 6,899,094 3.2 % Issuance of units in connection with Ascenty Acquisition 2,338,874 1.1 % — — % Incentive units held by employees and directors (see note 14) 1,944,738 0.9 % 1,590,001 0.8 % 217,006,540 100.0 % 213,959,395 100.0 % 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 $1,076.9 million and $887.0 million based on the closing market price of Digital Realty Trust, Inc. common stock on December 31, 2018 and 2017 , respectively. The following table shows activity for the noncontrolling interests in the Operating Partnership for the years ended December 31, 2018 , 2017 and 2016 : Common Incentive Total As of December 31, 2015 1,421,314 1,412,012 2,833,326 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (279,500 ) — (279,500 ) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) — (150,993 ) (150,993 ) Grant of incentive units to employees and directors — 74,246 74,246 Cancellation of incentive units held by employees and directors — (1,416 ) (1,416 ) 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 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 (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, 2018 , 2017 and 2016 (in thousands): Date dividend Dividend payable date Series C Preferred Stock Series E Preferred Stock Series F Preferred Stock Series G Preferred Stock Series H Preferred Stock Series I Preferred Stock Series J Preferred Stock Common February 17, 2016 March 31, 2016 $ — $ 5,031 $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 131,587 (1) May 11, 2016 June 30, 2016 — 5,031 3,023 3,672 6,730 3,969 — 131,607 (1) August 10, 2016 September 30, 2016 — — (2) 3,023 3,672 6,730 3,969 — 131,657 (1) November 9, 2016 December 30, 2016 for Preferred Stock; — — 3,023 3,672 6,730 3,969 — 141,882 (1) $ — $ 10,062 $ 12,092 $ 14,688 $ 26,920 $ 15,876 $ — $ 536,733 March 1, 2017 March 31, 2017 $ — $ — $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 148,358 (3) May 8, 2017 June 30, 2017 — — — (4) 3,672 6,730 3,969 — 150,814 (3) August 7, 2017 September 29, 2017 — — — 3,672 6,730 3,969 — 191,041 (3) November 2, 2017 December 29, 2017 for Preferred Stock; 3,963 (5) — — 3,672 6,730 3,969 4,200 (5) 191,067 (3) $ 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 (6) May 8, 2018 June 29, 2018 3,333 — — 3,672 6,730 3,969 2,625 208,071 (6) August 14, 2018 September 28, 2018 3,333 — — 3,672 6,730 3,969 2,625 208,166 (6) November 12, 2018 December 31, 2018 for Preferred Stock; 3,333 — — 3,672 6,730 3,969 2,625 208,415 (6) $ 13,332 $ — $ — $ 14,688 $ 26,920 $ 15,876 $ 10,500 $ 832,667 Annual rate of dividend per share $ 1.65625 $ 1.75000 $ 1.65625 $ 1.46875 $ 1.84375 $ 1.58750 $ 1.31250 (1) $ 3.520 annual rate of dividend per share. (2) Redeemed on September 15, 2016 for $25.35972 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 $4.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $10.3 million were recorded as a reduction to net income available to common stockholders. (3) $3.720 annual rate of dividend per share. (4) 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. (5) Represents a pro rata dividend from and including the original issue date to and including December 31, 2017. (6) $4.040 annual rate of dividend per share. 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 Cash flow Foreign currency net investment hedge adjustments Accumulated Balance as of December 31, 2016 $ (175,642 ) $ 4,888 $ 35,149 $ (135,605 ) Net current period change 28,272 5,898 (9,411 ) 24,759 Reclassification to interest expense from interest rate swaps — 2,414 — 2,414 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 )

Capital and Accumulated Other C

Capital and Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2018
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Capital and Accumulated Other Comprehensive Income (Loss)	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 14(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, which is anticipated to be no later than September 27, 2019. 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 Units Outstanding as of December 31, Balance (in thousands, net of issuance costs) as of December 31, Preferred Units (1) Date(s) Issued Initial Date to Redeem (2) Total Liquidation Value (in thousands) (3) Annual Distribution Rate (4) 2018 2017 2018 2017 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 365,000 1.84375 14,600,000 14,600,000 353,290 353,290 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 $ 1,266,250 50,650,000 50,650,000 $ 1,249,560 $ 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 $1,076.9 million and $887.0 million based on the closing market price of Digital Realty Trust, Inc.’s common stock on December 31, 2018 and 2017 , 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, 2018 , 2017 and 2016 (in thousands): Date distribution Distribution payable date Series C Preferred Units Series E Preferred Units Series F Preferred Units Series G Preferred Units Series H Preferred Units Series I Preferred Units Series J Preferred Units Common Feb 17, 2016 March 31, 2016 $ — $ 5,031 $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 131,587 (1) May 11, 2016 June 30, 2016 — 5,031 3,023 3,672 6,730 3,969 — 131,607 (1) Aug 10, 2016 September 30, 2016 — — (2) 3,023 3,672 6,730 3,969 — 131,657 (1) Nov 9, 2016 December 31, 2016 for — — 3,023 3,672 6,730 3,969 — 144,193 (1) $ — $ 10,062 $ 12,092 $ 14,688 $ 26,920 $ 15,876 $ — $ 539,044 Mar 1, 2017 March 31, 2017 $ — $ — $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 150,968 (3) May 8, 2017 June 30, 2017 — — — (4) 3,672 6,730 3,969 — 153,176 (3) Aug 7, 2017 September 29, 2017 — — — 3,672 6,730 3,969 — 199,049 (3) Nov 2, 2017 December 29, 2017 for 3,963 (5) — — 3,672 6,730 3,969 4,200 (5) 199,061 (3) $ 3,963 $ — $ 3,023 $ 14,688 $ 26,920 $ 15,876 $ 4,200 $ 702,254 Mar 1, 2018 March 30, 2018 $ 3,333 $ — $ — $ 3,672 $ 6,730 $ 3,969 $ 2,625 $ 216,953 (6) May 8, 2018 June 29, 2018 3,333 — — 3,672 6,730 3,969 2,625 216,789 (6) Aug 14, 2018 September 28, 2018 3,333 — — 3,672 6,730 3,969 2,625 216,825 (6) Nov 12, 2018 December 31, 2018 for 3,333 — — 3,672 6,730 3,969 2,625 216,838 (6) $ 13,332 $ — $ — $ 14,688 $ 26,920 $ 15,876 $ 10,500 $ 867,405 Annual rate of distribution per unit $ 1.65625 $ 1.75000 $ 1.65625 $ 1.46875 $ 1.84375 $ 1.58750 $ 1.31250 (1) $ 3.520 annual rate of distribution per unit. (2) Redeemed on September 15, 2016 for $25.35972 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 $4.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $10.3 million were recorded as a reduction to net income available to common unitholders. (3) $3.720 annual rate of distribution per unit. (4) 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. (5) Represents a pro rata distribution from and including the original issue date to and including December 31, 2017. (6) $4.040 annual rate of distribution per unit. (f) Accumulated Other Comprehensive Income (Loss) The accumulated balances for each item within other comprehensive income (loss) are as follows (in thousands): Foreign Cash flow Foreign currency net investment hedge adjustments Accumulated Balance as of December 31, 2016 $ (180,504 ) $ 4,191 $ 35,694 $ (140,619 ) Net current period change 28,709 6,108 (9,542 ) 25,275 Reclassification to interest expense from interest rate swaps — 2,459 — 2,459 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 )

Incentive Plan

Incentive Plan	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Incentive Plan	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 in connection with the 2014 Annual Meeting, which description is incorporated herein by reference. Effective as of September 14, 2017, the 2014 Incentive Award Plan was amended to provide that shares which remained available for issuance under DFT’s Amended and Restated 2011 Equity Incentive Plan immediately prior to the closing of the DFT Merger (as adjusted and converted into shares of Digital Realty Trust, Inc.’s common stock) may be used for awards under the 2014 Incentive Award Plan and will not reduce the shares authorized for grant under the 2014 Incentive Award Plan, to the extent that using such shares is permitted without stockholder approval under applicable stock exchange rules. In connection with the amendment to the 2014 Incentive Award Plan, on September 22, 2017, Digital Realty Trust, Inc. registered an additional 3.7 million shares that may be issued pursuant to the 2014 Incentive Award Plan. As of December 31, 2018 , approximately 7.1 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, 2018 , 2017 and 2016 and our unearned compensation as of December 31, 2018 and December 31, 2017 (in millions): Deferred Compensation Unearned Compensation Expected period to recognize unearned compensation (in years) Expensed Capitalized As of December 31, 2018 As of December 31, 2017 Year Ended December 31, Year Ended December 31, Type of incentive award 2018 2017 2016 2018 2017 2016 Long-term incentive units $ 6.8 $ 3.9 $ 4.5 $ 0.2 $ 1.7 $ 1.8 $ 11.5 $ 6.9 2.9 Market performance-based awards 12.7 9.6 7.9 0.8 2.3 1.9 24.8 24.7 2.5 Restricted stock 6.1 4.5 4.1 4.2 3.3 2.8 23.6 17.5 2.7 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, 2018 , 2017 and 2016 : Weighted Average Fair Value at Date of Grant Type of incentive award 2018 2017 2016 Long-term incentive units $ 101.86 $ 109.71 $ 87.18 Market performance-based awards $ 119.29 $ 111.06 $ 82.90 Restricted stock $ 100.33 $ 108.65 $ 83.58 (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, 2018 . Unvested Long-term Incentive Units Units Weighted-Average Unvested, beginning of period 99,295 $ 90.59 Granted 128,986 101.86 Vested (51,820 ) 88.88 Cancelled or expired (15,356 ) 83.93 Unvested, end of period 161,105 $ 100.94 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 and four years, the current vesting periods of the long-term incentive units. (b) Market Performance-Based Awards During the years ended December 31, 2018 , 2017 and 2016 , 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 2016, January 2017 or January 2018, 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 Market Performance Period is achieved at the “threshold,” “target” or “high” level as set forth below, the awards will become vested as to the market condition with respect to the percentage of Class D units or RSUs, as applicable, set forth below: Level RMS Relative Market Performance Vesting 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 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% will vest on February 27, 2020, subject to continued employment through each applicable vesting date. 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% will vest on February 27, 2019, subject to continued employment through each applicable vesting date. In January 2017, following the completion of the applicable Market Performance Period, the Compensation Committee determined that the high level had been achieved for the 2014 awards and, accordingly, 399,250 Class D units (including 44,702 distribution equivalent units that immediately vested on December 31, 2016, upon the high level being achieved) and 138,567 RSUs performance vested, subject to service-based vesting. On February 27, 2017, 50% of the 2014 awards vested and the remaining 50% vested on February 27, 2018. Following the completion of the applicable Market Performance Period, the 2017 awards that satisfy the market condition, if any, will vest 50% on February 27, 2020 and 50% on February 27, 2021, subject to continued employment through each applicable vesting date. Following the completion of the 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. 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: Award Date Expected Stock Price Volatility Risk-Free Interest Rate January 1, 2016 22% 1.32% February 16, 2016 26% 0.89% 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% 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, 2018 , 2,165,692 Class D units and 590,569 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 $21.8 million , $19.5 million and $21.2 million for the years ended December 31, 2018 , 2017 and 2016 , 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, 2018 . Unvested Restricted Stock Shares Weighted-Average Unvested, beginning of period 259,422 $ 90.54 Granted (1) 168,192 100.33 Vested (96,840 ) 83.63 Cancelled or expired (35,273 ) 97.96 Unvested, end of period 295,501 $ 97.49 (1) All restricted stock awards granted in 2018 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 $4.8 million , $4.6 million , and $3.6 million for the years ended December 31, 2018 , 2017 and 2016 , respectively.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments Currently, we use interest rate swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. To comply with the provisions of fair value accounting guidance, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, as of December 31, 2018 , we have assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and have determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. We do not have any fair value measurements on a recurring basis using significant unobservable inputs (Level 3) as of December 31, 2018 or December 31, 2017 . 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, 2018 , there was no impact from netting arrangements as the Company did not have any derivatives in liability positions. 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 sheet 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. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the years ended December 31, 2018 , 2017 and 2016, there were no ineffective portions to our interest rate swaps. As of December 31, 2018 and December 31, 2017 , we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (in thousands): Notional Amount Fair Value at Significant Other As of As of Type of Strike Effective Date Expiration As of (4) As of (4) Currently-paying contracts $ 206,000 (1) $ 206,000 (1) Swap 1.611 Jun 15, 2017 Jan 15, 2020 $ 1,976 $ 1,409 54,905 (1) 54,905 (1) Swap 1.605 Jun 6, 2017 Jan 6, 2020 517 374 75,000 (1) 75,000 (1) Swap 1.016 Apr 6, 2016 Jan 6, 2021 2,169 2,260 75,000 (1) 75,000 (1) Swap 1.164 Jan 15, 2016 Jan 15, 2021 1,970 1,947 300,000 (1) 300,000 (1) Swap 1.435 Jan 15, 2016 Jan 15, 2023 11,463 9,978 — 229,012 (2) Swap 0.792 Jan 15, 2016 Jan 15, 2019 — (430 ) 72,220 (3) 78,357 (3) Swap 0.779 Jan 15, 2016 Jan 15, 2021 2,024 3,034 $ 783,125 $ 1,018,274 $ 20,119 $ 18,572 (1) Represents debt which bears interest based on one-month U.S. LIBOR. (2) Represents debt which bears interest based on one-month GBP LIBOR. Translation to U.S. dollars is based on exchange rate of $1.35 to £1.00 as of December 31, 2017 . (3) Represents debt which bears interest based on one-month CDOR. Translation to U.S. dollars is based on exchange rates of $0.73 to 1.00 CAD as of December 31, 2018 and $0.80 to 1.00 CAD as of December 31, 2017 . (4) 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, 2018 , we estimate that an additional $7.8 million will be reclassified as a decrease to interest expense during the year ending December 31, 2019, 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, 2018 .

Fair Value of Instruments

Fair Value of Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Instruments	Fair Value of Instruments We disclose fair value information about all financial instruments, whether or not recognized in the 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, 2018 and December 31, 2017 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 15. "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 loan 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 facility approximates fair value, due to the variability of interest rates. As of December 31, 2018 and December 31, 2017 , the aggregate estimated fair value and carrying value of our global revolving credit facility, unsecured term loan, unsecured senior notes and mortgage loans were as follows (in thousands): Categorization As of December 31, 2018 As of December 31, 2017 Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Global revolving credit facilities (1)(5) Level 2 $ 1,663,156 $ 1,663,156 $ 558,191 $ 558,191 Unsecured term loans (2)(6) Level 2 1,183,121 1,183,121 1,425,117 1,425,117 Unsecured senior notes (3)(4)(7) Level 2 7,684,368 7,629,679 6,976,603 6,608,545 Mortgage loans (3)(8) Level 2 706,086 705,924 106,523 106,611 $ 11,236,731 $ 11,181,880 $ 9,066,434 $ 8,698,464 (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 mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2019 Notes, 5.875% 2020 Notes, 3.400% 2020 Notes, 2021 Notes, 3.950% 2022 Notes, 3.625% 2022 Notes, 4.750% 2023 Notes, 2.750% 2023 Notes, 2.625% 2024 Notes, 2.750% 2024 Notes, 4.750% 2025 Notes, 4.250% 2025 Notes, 2027 Notes, 2028 Notes, 2029 Notes and 2030 Notes are valued based on quoted market prices. (4) The carrying value of the 5.875% 2020 Notes, 3.400% 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 4.750% 2023 Notes, 2.750% 2023 Notes, 2.625% 2024 Notes, 2.750% 2024 Notes, 4.250% 2025 Notes, 2027 Notes, 2028 Notes, 2029 Notes and 2030 Notes are net of discount of $19.9 million and $18.5 million in the aggregate as of December 31, 2018 and December 31, 2017 , respectively. (5) The estimated fair value and carrying value are exclusive of deferred financing costs of $15.4 million and $7.2 million as of December 31, 2018 and December 31, 2017 , respectively. (6) The estimated fair value and carrying value are exclusive of deferred financing costs of $4.2 million and $4.8 million as of December 31, 2018 and December 31, 2017 , respectively. (7) The estimated fair value and carrying value are exclusive of deferred financing costs of $40.6 million and $38.3 million as of December 31, 2018 and December 31, 2017 , respectively. (8) The estimated fair value and carrying value are exclusive of deferred financing costs of $20.2 million and $0.0 million as of December 31, 2018 and December 31, 2017 , respectively.

Tenant Leases

Tenant Leases	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Tenant Leases	Tenant Leases The future minimum lease payments to be received (excluding operating expense reimbursements) by us as of December 31, 2018 , under non-cancelable operating leases are as follows (in thousands): 2019 $ 2,225,243 2020 1,784,585 2021 1,566,645 2022 1,263,810 2023 1,055,553 Thereafter 3,329,052 Total $ 11,224,888 The table above excludes leases related to the Ascenty Acquisition.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies (a) Operating Leases We lease space at certain of our data centers from third parties, primarily data centers acquired as part of the Telx Acquisition, European Portfolio Acquisition and Ascenty Acquisition, and certain equipment under noncancelable operating lease agreements. The operating leases for our data centers expire at various dates through 2036 with renewal options available to us. The lease agreements typically provide for base rental rates that increase at defined intervals during the term of the lease. As of December 31, 2018 , certain of our data centers, primarily in Europe are subject to ground leases. The termination dates of these ground leases range from 2036 to 2981. These ground leases generally require us to make fixed annual rental payments. In addition, our corporate headquarters along with several regional office locations are subject to leases with termination dates ranging from 2019 to 2024. These office leases generally require us to make fixed annual rental payments plus pay our share of common area, real estate and utility expenses. Some of our ground and office leases include escalation clauses and renewal options. Rental expense for our operating leases, including ground leases, was approximately $85.0 million , $82.5 million , and $83.6 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. The minimum commitment under these 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 (b) Capital Lease Obligations Capital lease obligations are recorded for leases in which the Company was deemed to be the owner during the construction period under lease accounting guidance. Further, each lease contains provisions indicating continuing involvement with the property at the end of the construction period. As a result, in accordance with applicable accounting guidance, buildings and related assets subject to the leases are reflected in buildings and improvements and accumulated depreciation and amortization on the Company’s consolidated balance sheets and depreciated over their remaining useful lives. The present value of the lease payments associated with these buildings is recorded as capital lease obligations and is classified in accounts payable and other accrued liabilities in the consolidated balance sheets. The financing obligation is amortized using the effective interest method and the interest rate is determined in accordance with the requirements of sale-leaseback accounting. 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 The table above excludes a capital lease obligation in the amount of $50.0 million assumed as part of the Ascenty Acquisition, as this is a provisional estimate that is subject to change. (c) 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, 2018 , we had open commitments, including amounts reimbursable of approximately $13.4 million , related to construction contracts of approximately $401.4 million . (d) Legal Proceedings Although the Company is involved in legal proceedings arising in the ordinary course of business, as of December 31, 2018 , 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, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited)	Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited) The tables below reflect selected quarterly information for the years ended December 31, 2018 and 2017 . Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per share amounts). Three Months Ended December 31, 2018 September 30, 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 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 $ 0.15 $ 0.33 $ 0.32 $ 0.42 Diluted net income per share available to $ 0.15 $ 0.33 $ 0.32 $ 0.42 Three Months Ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total operating revenues $ 731,445 $ 609,925 $ 565,989 $ 550,569 Net income 79,658 12,475 79,571 84,563 Net income attributable to Digital Realty Trust, Inc. 73,635 12,435 78,651 83,538 Preferred stock dividends and issuance costs 20,329 16,575 20,814 17,393 Net income (loss) available to common stockholders 53,306 (4,140 ) 57,837 66,145 Basic net income (loss) per share available to $ 0.26 $ (0.02 ) $ 0.36 $ 0.42 Diluted net income (loss) per share available to $ 0.26 $ (0.02 ) $ 0.36 $ 0.41

Quarterly Financial Informati_2

Quarterly Financial Information (Digital Realty Trust, L.P.)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information [Line Items]
Quarterly Financial Information (Digital Realty Trust, L.P.) (unaudited)	Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited) The tables below reflect selected quarterly information for the years ended December 31, 2018 and 2017 . Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per share amounts). Three Months Ended December 31, 2018 September 30, 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 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 $ 0.15 $ 0.33 $ 0.32 $ 0.42 Diluted net income per share available to $ 0.15 $ 0.33 $ 0.32 $ 0.42 Three Months Ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total operating revenues $ 731,445 $ 609,925 $ 565,989 $ 550,569 Net income 79,658 12,475 79,571 84,563 Net income attributable to Digital Realty Trust, Inc. 73,635 12,435 78,651 83,538 Preferred stock dividends and issuance costs 20,329 16,575 20,814 17,393 Net income (loss) available to common stockholders 53,306 (4,140 ) 57,837 66,145 Basic net income (loss) per share available to $ 0.26 $ (0.02 ) $ 0.36 $ 0.42 Diluted net income (loss) per share available to $ 0.26 $ (0.02 ) $ 0.36 $ 0.41
Digital Realty Trust, L.P.
Quarterly Financial Information [Line Items]
Quarterly Financial Information (Digital Realty Trust, L.P.) (unaudited)	Quarterly Financial Information (Digital Realty Trust, L.P.) (unaudited) The tables below reflect selected quarterly information for the years ended December 31, 2018 and 2017 . Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per unit amounts). Three Months Ended December 31, 2018 September 30, 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 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 $ 0.15 $ 0.33 $ 0.32 $ 0.42 Diluted net income per unit available to common $ 0.15 $ 0.33 $ 0.32 $ 0.42 Three Months Ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total operating revenues $ 731,445 $ 609,925 $ 565,989 $ 550,569 Net income 79,658 12,475 79,571 84,563 Net income attributable to Digital Realty Trust, L.P. 75,773 12,356 79,458 84,442 Preferred unit distributions and issuance costs associated 20,329 16,575 20,814 17,393 Net income (loss) available to common unitholders 55,444 (4,219 ) 58,644 67,049 Basic net income (loss) per unit available to common unitholders $ 0.26 $ (0.02 ) $ 0.36 $ 0.42 Diluted net income (loss) per unit available to common unitholders $ 0.26 $ (0.02 ) $ 0.36 $ 0.41

Schedule III Properties And Acc

Schedule III Properties And Accumulated Depreciation	12 Months Ended
	Dec. 31, 2018
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Properties And Accumulated Depreciation	Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 36 NE 2nd Street Miami — 1,942 — 24,184 28,408 — 1,970 — 52,564 54,534 (17,441 ) 2002 (A) 2323 Bryan Street Dallas — 1,838 — 77,604 55,942 — 1,838 — 133,546 135,384 (71,792 ) 2002 (A) 300 Boulevard East New York — 5,140 — 48,526 62,649 — 5,140 — 111,175 116,315 (67,848 ) 2002 (A) 2334 Lundy Place Silicon Valley — 3,607 — 23,008 67 — 3,607 — 23,075 26,682 (10,813 ) 2002 (A) 2440 Marsh Lane Dallas — 1,477 — 10,330 73,754 — 1,486 — 84,075 85,561 (67,865 ) 2003 (A) 375 Riverside Parkway Atlanta — 1,250 — 11,578 31,704 — 1,250 — 43,282 44,532 (31,210 ) 2003 (A) 4849 Alpha Road Dallas — 2,983 — 10,650 44,045 — 2,983 — 54,695 57,678 (33,311 ) 2004 (A) 600 West Seventh Street Los Angeles — 18,478 — 50,824 64,912 — 18,489 — 115,725 134,214 (68,601 ) 2004 (A) 2045 & 2055 Lafayette Street Silicon Valley — 6,065 — 43,817 45 — 6,065 — 43,862 49,927 (19,242 ) 2004 (A) 11830 Webb Chapel Road Dallas — 5,881 — 34,473 2,355 — 5,881 — 36,828 42,709 (17,373 ) 2004 (A) 150 South First Street Silicon Valley — 2,068 — 29,214 1,499 — 2,068 — 30,713 32,781 (13,631 ) 2004 (A) 200 Paul Avenue San Francisco — 14,427 — 75,777 121,670 — 14,498 — 197,376 211,874 (87,390 ) 2004 (A) 1100 Space Park Drive Silicon Valley — 5,130 — 18,206 43,082 — 5,130 — 61,288 66,418 (34,035 ) 2004 (A) 3015 Winona Avenue Los Angeles — 6,534 — 8,356 6 — 6,534 — 8,362 14,896 (3,825 ) 2004 (A) 350 East Cermak Road Chicago — 8,466 — 103,232 236,679 — 8,620 — 339,757 348,377 (223,795 ) 2005 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 8534 Concord Center Drive Denver — 2,181 — 11,561 763 — 2,181 — 12,324 14,505 (5,537 ) 2005 (A) 2401 Walsh Street Silicon Valley — 5,775 — 19,267 37 — 5,775 — 19,304 25,079 (8,868 ) 2005 (A) 2403 Walsh Street Silicon Valley — 5,514 — 11,695 48 — 5,514 — 11,743 17,257 (5,675 ) 2005 (A) 200 North Nash Street Los Angeles — 4,562 — 12,503 232 — 4,562 — 12,735 17,297 (6,734 ) 2005 (A) 731 East Trade Street Charlotte 1,777 (1) 1,748 — 5,727 267 — 1,748 — 5,994 7,742 (2,599 ) 2005 (A) 113 North Myers Charlotte — 1,098 — 3,127 4,762 — 1,098 — 7,889 8,987 (2,493 ) 2005 (A) 125 North Myers Charlotte — 1,271 — 3,738 6,337 — 1,271 — 10,075 11,346 (7,697 ) 2005 (A) Paul van Vlissingenstraat 16 Amsterdam — — — 15,255 26,722 — — — 41,977 41,977 (20,320 ) 2005 (A) 600-780 S. Federal Chicago — 7,849 — 27,881 35,990 — 7,975 — 63,745 71,720 (18,818 ) 2005 (A) 115 Second Avenue Boston — 1,691 — 12,569 11,458 — 1,691 — 24,027 25,718 (15,050 ) 2005 (A) Chemin de l’Epinglier 2 Geneva — — — 20,071 (558 ) — — — 19,513 19,513 (8,220 ) 2005 (A) 7500 Metro Center Drive Austin — 1,177 — 4,877 69,483 — 1,177 — 74,360 75,537 (13,685 ) 2005 (A) 3 Corporate Place New York — 1,543 — 12,678 86,885 — 1,543 — 99,563 101,106 (85,242 ) 2005 (A) 1115 Centennial Avenue New York — 581 — — 58,109 — 581 — 58,109 58,690 (448 ) 2005 (C) 4025 Midway Road Dallas — 2,196 — 14,037 30,842 — 2,196 — 44,879 47,075 (30,901 ) 2006 (A) Clonshaugh Industrial Estate Dublin — — 1,444 5,569 1,685 — — 95 8,603 8,698 (5,526 ) 2006 (A) 6800 Millcreek Drive Toronto — 1,657 — 11,352 2,285 — 1,657 — 13,637 15,294 (6,984 ) 2006 (A) 101 Aquila Way Atlanta — 1,480 — 34,797 (11,162 ) — 1,556 — 23,559 25,115 — 2006 (A) Digital Houston Houston — 6,965 — 23,492 148,984 — 6,965 — 172,476 179,441 (70,198 ) 2006 (A) 120 E Van Buren Phoenix — 4,524 — 157,822 120,452 — 4,524 — 278,274 282,798 (138,607 ) 2006 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: Gyroscoopweg 2E-2F Amsterdam — — — 13,450 (1,376 ) — — — 12,074 12,074 (5,113 ) 2006 (A) Clonshaugh Industrial Estate II Dublin — — — — 79,116 — — — 79,116 79,116 (47,814 ) 2006 (C) 600 Winter Street Boston — 1,429 — 6,228 456 — 1,429 — 6,684 8,113 (2,604 ) 2006 (A) 2300 NW 89th Place Miami — 1,022 — 3,767 19 — 1,022 — 3,786 4,808 (1,723 ) 2006 (A) 2055 East Technology Circle Phoenix — — — 8,519 30,060 — — — 38,579 38,579 (30,232 ) 2006 (A) Unit 9, Blanchardstown Corporate Park Dublin — 1,927 — 40,024 24,651 — 1,660 — 64,942 66,602 (26,209 ) 2006 (A) 111 8th Avenue New York — — — 17,688 27,230 — — — 44,918 44,918 (31,402 ) 2006 (A) 8100 Boone Boulevard N. Virginia — — — 158 2,034 — — — 2,192 2,192 (2,192 ) 2006 (A) 21110 Ridgetop Circle N. Virginia — 2,934 — 14,311 1,307 — 2,934 — 15,618 18,552 (5,991 ) 2007 (A) 3011 Lafayette Street Silicon Valley — 3,354 — 10,305 52,300 — 3,354 — 62,605 65,959 (51,360 ) 2007 (A) 44470 Chilum Place N. Virginia — 3,531 — 37,360 1 — 3,531 — 37,361 40,892 (12,144 ) 2007 (A) 43881 Devin Shafron Drive N. Virginia — 4,653 — 23,631 96,033 — 4,653 — 119,664 124,317 (96,517 ) 2007 (A) 43831 Devin Shafron Drive N. Virginia — 3,027 — 16,247 1,382 — 3,027 — 17,629 20,656 (6,485 ) 2007 (A) 43791 Devin Shafron Drive N. Virginia — 3,490 — 17,444 77,914 — 3,490 — 95,358 98,848 (61,691 ) 2007 (A) Mundells Roundabout London — 31,354 — — 41,294 — 20,330 — 52,318 72,648 (13,558 ) 2007 (C) 1500 Space Park Drive Silicon Valley — 6,732 — 6,325 46,277 — 4,106 — 55,228 59,334 (53,527 ) 2007 (A) Cressex 1 London — 3,629 — 9,036 19,302 — 2,452 — 29,515 31,967 (20,732 ) 2007 (A) Naritaweg 52 Amsterdam — — 1,192 23,441 (5,129 ) — — 937 18,567 19,504 (6,048 ) 2007 (A) 1 St. Anne’s Boulevard London — 1,490 — 1,045 (804 ) — 976 — 755 1,731 (210 ) 2007 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 2 St. Anne’s Boulevard London — 922 — 695 32,979 — 650 — 33,946 34,596 (6,437 ) 2007 (A) 3 St. Anne’s Boulevard London — 22,079 — 16,351 79,708 — 14,335 — 103,803 118,138 (60,140 ) 2007 (A) 365 South Randolphville Road New York — 3,019 — 17,404 301,969 — 3,023 — 319,369 322,392 (133,568 ) 2008 (A) 701 & 717 Leonard Street Dallas — 2,165 — 9,934 835 — 2,165 — 10,769 12,934 (3,255 ) 2008 (A) Manchester Technopark Manchester — — — 23,918 (8,161 ) — — — 15,757 15,757 (4,763 ) 2008 (A) 1201 Comstock Street Silicon Valley — 2,093 — 1,606 26,945 — 3,398 — 27,246 30,644 (20,433 ) 2008 (A) 1550 Space Park Drive Silicon Valley — 2,301 — 766 2,649 — 5,716 — — 5,716 — 2008 (A) 1525 Comstock Street Silicon Valley — 2,293 — 16,216 31,131 — 2,061 — 47,579 49,640 (34,656 ) 2008 (C) 43830 Devin Shafron Drive N. Virginia — 5,509 — — 74,916 — 5,509 — 74,916 80,425 (43,316 ) 2009 (C) 1232 Alma Road Dallas — 2,267 — 3,740 65,647 — 2,266 — 69,388 71,654 (43,853 ) 2009 (A) 900 Quality Way Dallas — 1,446 — 1,659 69,489 — 1,437 — 71,157 72,594 (21,533 ) 2009 (A) 1210 Integrity Drive Dallas — 2,041 — 3,389 189,102 — 3,472 — 191,060 194,532 (6,435 ) 2009 (A) 907 Security Row Dallas — 333 — 344 97,744 — 2,112 — 96,309 98,421 (9,228 ) 2009 (A) 908 Quality Way Dallas — 6,730 — 4,493 13,948 — 2,067 — 23,104 25,171 (18,441 ) 2009 (A) 904 Quality Way Dallas — 760 — 744 6,819 — 1,151 — 7,172 8,323 (1,194 ) 2009 (A) 1215 Integrity Drive Dallas — — — — 69,836 — 995 — 68,841 69,836 (18,600 ) 2009 (C) 1350 Duane & 3080 Raymond Silicon Valley — 7,081 — 69,817 354 — 7,081 — 70,171 77,252 (16,611 ) 2009 (A) 45901 & 45845 Nokes Boulevard N. Virginia — 3,437 — 28,785 450 — 3,437 — 29,235 32,672 (7,366 ) 2009 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 21561 & 21571 Beaumeade Circle N. Virginia — 3,966 — 24,211 45 — 3,966 — 24,256 28,222 (5,631 ) 2009 (A) 60 & 80 Merritt New York — 3,418 — 71,477 97,152 — 3,418 — 168,629 172,047 (41,819 ) 2010 (A) 55 Middlesex Boston — 9,975 — 68,363 14,043 — 9,975 — 82,406 92,381 (25,924 ) 2010 (A) 128 First Avenue Boston — 5,465 — 185,348 37,493 — 5,465 — 222,841 228,306 (71,312 ) 2010 (A) Cateringweg 5 Amsterdam — — 3,518 3,517 38,829 — — 3,296 42,568 45,864 (8,480 ) 2010 (A) 1725 Comstock Street Silicon Valley — 3,274 — 6,567 39,190 — 3,274 — 45,757 49,031 (25,913 ) 2010 (A) 3105 Alfred Street Silicon Valley — 6,533 — 3,725 123,928 — 6,532 — 127,654 134,186 (31,190 ) 2010 (A) 365 Main Street San Francisco — 22,854 — 158,709 29,725 — 22,854 — 188,434 211,288 (53,717 ) 2010 (A) 720 2nd Street San Francisco — 3,884 — 116,861 10,865 — 3,884 — 127,726 131,610 (33,071 ) 2010 (A) 2260 East El Segundo Los Angeles — 11,053 — 51,397 15,774 — 11,053 — 67,171 78,224 (20,837 ) 2010 (A) 2121 South Price Road Phoenix — 7,335 — 238,452 213,355 — 7,335 — 451,807 459,142 (128,398 ) 2010 (A) 4030 Lafayette N. Virginia — 2,492 — 16,912 10,372 — 2,492 — 27,284 29,776 (6,863 ) 2010 (A) 4040 Lafayette N. Virginia — 1,246 — 4,267 24,717 — 1,246 — 28,984 30,230 (4,778 ) 2010 (A) 4050 Lafayette N. Virginia — 1,246 — 4,371 35,994 — 1,246 — 40,365 41,611 (23,551 ) 2010 (A) 2805 Lafayette Street Silicon Valley — 8,976 — 18,155 130,422 — 8,294 — 149,259 157,553 (31,988 ) 2010 (A) 29A International Business Park Singapore — — — 137,545 213,162 — — — 350,707 350,707 (128,018 ) 2010 (A) 43940 Digital Loudoun Plaza N. Virginia — 6,229 — — 284,883 — 7,524 — 283,588 291,112 (74,154 ) 2011 (C) 44060 Digital Loudoun Plaza N. Virginia — 3,700 — — 187,226 — 3,441 — 187,485 190,926 (24,690 ) 2011 (C) 44100 Digital Loudoun Plaza N. Virginia — 3,700 — — 140,869 — 3,493 — 141,076 144,569 (11,587 ) 2011 (C) 43780 Digital Loudoun Plaza N. Virginia — 3,671 — — 122,489 — 4,186 — 121,974 126,160 (6,976 ) 2011 (C) 1-11 Templar Road Sydney — 6,937 — — 62,870 — 4,367 — 65,440 69,807 (15,816 ) 2011 (C) 13-23 Templar Road Sydney 4,236 — — 68,074 — 3,530 — 68,780 72,310 (137 ) 2011 (C) Fountain Court London — 7,544 — 12,506 94,180 — 6,319 — 107,911 114,230 (24,250 ) 2011 (A) 72 Radnor Drive Melbourne — 2,568 — — 66,203 — 1,749 — 67,022 68,771 (9,947 ) 2011 (C) 98 Radnor Drive Melbourne — 1,899 — — 35,692 — 1,345 — 36,246 37,591 (15,159 ) 2011 (C) 105 Cabot Street Boston — 2,386 — — 59,267 — 2,448 — 59,205 61,653 (9,257 ) 2011 (C) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 3825 NW Aloclek Place Portland — 1,689 — — 58,153 — 1,689 — 58,153 59,842 (21,249 ) 2011 (C) Profile Park Dublin — 6,288 — — 73,579 — 9,573 — 70,294 79,867 (3,982 ) 2011 (C) 760 Doug Davis Drive Atlanta — 4,837 — 53,551 3,373 — 4,837 — 56,924 61,761 (13,384 ) 2011 (A) 2501 S. State Hwy 121 Dallas — 23,137 — 93,943 19,180 — 24,612 — 111,648 136,260 (31,141 ) 2012 (A) 9333 Grand Avenue Chicago — 5,686 — 14,515 74,579 — 1,205 — 93,575 94,780 (34,196 ) 2012 (A) 9355 Grand Avenue Chicago — — — 227,902 — 2,518 — 225,384 227,902 (22,298 ) 2012 (A) 9377 Grand Avenue Chicago — — — 123,953 — 2,137 — 121,816 123,953 (3,683 ) 2012 (A) 850 E Collins Dallas — 1,614 — — 85,337 — 1,614 — 85,337 86,951 (19,313 ) 2012 (C) 950 E Collins Dallas — 1,546 — — 75,284 — 1,546 — 75,284 76,830 (12,178 ) 2012 (C) 400 S. Akard Dallas — 10,075 — 62,730 2,657 — 10,075 — 65,387 75,462 (11,686 ) 2012 (A) 410 Commerce Boulevard New York — — — — 30,212 — — — 30,212 30,212 (12,866 ) 2012 (C) Croydon London — 1,683 — 104,728 40,542 — 2,277 — 144,676 146,953 (26,060 ) 2012 (A) Watford London — — 7,355 219,273 (6,852 ) — — 6,247 213,529 219,776 (39,423 ) 2012 (A) Unit 21 Goldsworth Park London — 17,334 — 928,129 (159,279 ) — 12,735 — 773,449 786,184 (147,488 ) 2012 (A) 11900 East Cornell Denver — 3,352 — 80,640 2,796 — 3,352 — 83,436 86,788 (17,330 ) 2012 (A) 701 Union Boulevard New York — 10,045 — 6,755 25,274 — 42,074 — — 42,074 — 2012 (A) 23 Waterloo Road Sydney — 7,112 — 3,868 (3,534 ) — 4,823 — 2,623 7,446 (436 ) 2012 (A) 1 Rue Jean-Pierre Paris — 9,621 — 35,825 (5,945 ) — 8,362 — 31,139 39,501 (6,777 ) 2012 (A) Liet-dit le Christ de Saclay Paris — 3,402 — 3,090 (849 ) — 2,957 — 2,686 5,643 (754 ) 2012 (A) 127 Rue de Paris Paris — 8,637 — 10,838 (2,548 ) — 7,507 — 9,420 16,927 (2,551 ) 2012 (A) 17201 Waterview Parkway Dallas — 2,070 — 6,409 42 — 2,070 — 6,451 8,521 (1,253 ) 2013 (A) 1900 S. Price Road Phoenix — 5,380 — 16,975 982 — 5,512 — 17,825 23,337 (2,217 ) 2013 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total 371 Gough Road Toronto — 7,394 677 87,318 — 5,560 — 89,829 95,389 (9,855 ) 2013 (A) 1500 Towerview Road Minneapolis — 10,190 20,054 3,191 — 10,190 — 23,245 33,435 (4,857 ) 2013 (A) Principal Park London — 11,837 — 104,084 — 12,343 — 103,578 115,921 (9,625 ) 2013 (C) Liverpoolweg 10 Amsterdam — 733 3,122 9,730 — 644 — 12,941 13,585 (2,482 ) 2013 (A) DePresident Amsterdam — 6,737 — 117,156 — 7,858 — 116,035 123,893 (2,506 ) 2013 (C) Crawley 2 London — 24,305 — 60,285 — 26,637 — 57,953 84,590 (463 ) 2014 (C) Digital Deer Park 3 Melbourne — 1,600 — — 3 — 1,603 — — 1,603 — 2015 (C) 3 Loyang Way Singapore — — — — 168,365 — — — 168,365 168,365 (3,961 ) 2015 (A) Digital Loudoun III N. Virginia — 43,000 — — 572,790 — 60,358 — 555,432 615,790 (6,648 ) 2015 (C) Digital Frankfurt Frankfurt — 5,543 — — 101,172 — 9,987 — 96,728 106,715 (934 ) 2015 (C) 56 Marietta Street Atlanta (2) — 1,700 — 211,397 22,788 — 1,700 — 234,185 235,885 (30,981 ) 2015 (A) 2 Peekay Drive New York (2) — — — 115,439 38,235 — — — 153,674 153,674 (25,011 ) 2015 (A) 100 Delawanna Avenue New York (2) — 3,600 — 85,438 7,043 — 3,600 — 92,481 96,081 (10,686 ) 2015 (A) 60 Hudson Street New York (2) — — — 32,280 13,709 — — — 45,989 45,989 (12,278 ) 2015 (A) 32 Avenue of the Americas New York (2) — — — 30,980 3,457 — — — 34,437 34,437 (8,693 ) 2015 (A) 3433 S 120th Place Seattle (2) — — — 11,688 2,324 — — — 14,012 14,012 (4,818 ) 2015 (A) 8435 Stemmons Freeway Dallas (2) — — — 5,023 2,236 — — — 7,259 7,259 (2,097 ) 2015 (A) 2625 Walsh Avenue Silicon Valley (2) — — — 4,276 7,768 — — — 12,044 12,044 (2,626 ) 2015 (A) 111 8th Avenue - Telx New York (2) — — — 42,454 14,422 — — 56,876 56,876 (16,822 ) 2015 (A) 350 East Cermak Road - Telx Chicago (2) — — — 13,933 8,163 — — — 22,096 22,096 (5,499 ) 2015 (A) 200 Paul Avenue - Telx San Francisco (2) — — — 6,719 3,322 — — — 10,041 10,041 (2,750 ) 2015 (A) 2323 Bryan Street - Telx Dallas (2) — — — 5,191 3,770 — — — 8,961 8,961 (2,578 ) 2015 (A) 600 W. 7th Street - Telx Los Angeles (2) — — — 3,689 5,096 — — — 8,785 8,785 (1,851 ) 2015 (A) 3825 NW Aloclek Place - Telx Portland (2) — — — 3,131 1,104 — — — 4,235 4,235 (1,316 ) 2015 (A) 120 E. Van Buren Street - Telx Phoenix (2) — — — 2,848 2,407 — — — 5,255 5,255 (1,299 ) 2015 (A) 36 NE 2nd Street - Telx Miami (2) — — — 1,842 2,806 — — — 4,648 4,648 (1,238 ) 2015 (A) 600-780 S. Federal Street - Telx Chicago (2) — — — 1,815 3,227 — — — 5,042 5,042 (1,035 ) 2015 (A) 113 N. Myers Street - Telx Charlotte (2) — — — 476 746 — — — 1,222 1,222 (268 ) 2015 (A) 1100 Space Park Drive - Telx Silicon Valley (2) — — — 352 1,122 — — — 1,474 1,474 (233 ) 2015 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total 300 Boulevard East - Telx New York (2) — — — 197 55 — — — 252 252 (139 ) 2015 (A) Science Park Amsterdam (3) — 665 — 75,095 22,517 — 693 — 97,584 98,277 (6,905 ) 2016 (A) Sovereign House London (3) — 7,943 — 75,184 36,988 — — — 120,115 120,115 (12,253 ) 2016 (A) Amstel Business Park Amsterdam (3) — 2,991 — 58,138 14,086 — 3,096 — 72,119 75,215 (14,666 ) 2016 (A) Olivers Yard London (3) — 7,943 — 34,744 1,353 — 7,780 — 36,260 44,040 (10,089 ) 2016 (A) Bonnington House London (3) — — — 14,127 72,272 — 174 — 86,225 86,399 (2,805 ) 2016 (A) West Drayton London (3) — — — 10,135 1,469 — — — 11,604 11,604 (4,750 ) 2016 (A) Lyonerstrasse Frankfurt (3) — — — 8,407 3,140 — — — 11,547 11,547 (3,568 ) 2016 (A) Meridian Gate London (3) — — — 5,893 692 — — — 6,585 6,585 (2,538 ) 2016 (A) NE Corner of Campbell Road and Ferris Road Dallas — 21,902 — — 795 — 22,685 — 12 22,697 — 2016 (C) 9401 West Grand Avenue Chicago — 12,500 — — 89,688 — 17,363 — 84,825 102,188 — 2016 (C) Broad Run Technology Park N. Virginia — 18,019 — — 14,998 — 27,963 — 5,054 33,017 — 2016 (C) 2425-2553 Edgington Street Chicago — 11,950 — 1,615 43 — 11,959 — 1,649 13,608 (99 ) 2017 (C) 44490 Chilum Place N. Virginia (4) — 4,180 — 76,745 1,166 — 4,180 — 77,911 82,091 (6,086 ) 2017 (A) 44520 Hastings Drive N. Virginia (4) 104,000 6,140 — 108,105 1,050 — 6,140 — 109,155 115,295 (8,271 ) 2017 (A) 44480 Hastings Drive N. Virginia (4) — 12,860 — 278,384 426 — 12,860 — 278,810 291,670 (21,536 ) 2017 (A) 44521 Hastings Drive N. Virginia (4) — 13,210 — 315,539 307 — 13,210 — 315,846 329,056 (24,425 ) 2017 (A) 44461 Chilum Place N. Virginia (4) — 9,620 — 249,371 282 — 9,620 — 249,653 259,273 (19,418 ) 2017 (A) 21625 Gresham Drive N. Virginia (4) — 17,500 — 448,968 74 — 17,500 — 449,042 466,542 (35,066 ) 2017 (A) 21745 Sir Timothy Drive N. Virginia (4) — 16,010 — 289,281 6,171 — 16,010 — 295,452 311,462 (17,418 ) 2017 (A) 21744 Sir Timothy Drive N. Virginia (4) — 10,523 — 50,411 176,111 — 10,739 — 226,306 237,045 (4,924 ) 2017 (A) 2200 Busse Road Chicago (4) — 17,270 — 384,558 1,251 — 17,270 — 385,809 403,079 (28,401 ) 2017 (A) 2299 Busse Road Chicago (4) — 12,780 — 348,348 (1,701 ) — 12,780 — 346,647 359,427 (26,551 ) 2017 (A) 1780 Business Center Drive N. Virginia (4) — 7,510 — 106,363 353 — 7,510 — 106,716 114,226 (7,275 ) 2017 (A) 8217 Linton Hall Road N. Virginia (4) — 22,340 — 81,985 343 — 22,340 — 82,328 104,668 (5,266 ) 2017 (A) 1400 East Devon Avenue Chicago (4) — 11,012 — 178,627 60,449 — 11,261 — 238,827 250,088 (6,732 ) 2017 (A) 2220 De La Cruz Blvd Silicon Valley (4) — 84,650 — 634,007 2,038 — 84,650 — 636,045 720,695 (43,502 ) 2017 (A) 1 Century Place Toronto (4) — 26,600 — 116,863 67,153 — 25,557 — 185,059 210,616 (1,001 ) 2017 (C) 505 North Railroad Avenue Chicago — 20,431 — 245,810 983 — 16,513 — 250,711 267,224 (6,441 ) 2017 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total 250 Williams Atlanta — — — — 24,088 — — — 24,088 24,088 (3,102 ) 2017 (C) CME Agreement Chicago — — — — 41,478 — — — 41,478 41,478 (14,659 ) 2017 (C) Osaka 2 Osaka — 13,593 — — 104,994 — 15,489 — 103,098 118,587 — 2017 (C) Osaka 3 Osaka — 4,713 — — 249 — 4,962 — — 4,962 — 2017 (C) De President II Amsterdam — 6,315 — — 2,905 — 7,095 — 2,125 9,220 — 2017 (C) Development Property -- N. Virginia N. Virginia (4) — 16,200 — 573 267 — 17,026 — 14 17,040 (2 ) 2017 (C) Development Property -- Portland Portland (4) — 11,672 — 5,924 8,798 — 12,179 — 14,215 26,394 (1 ) 2017 (C) Development Property -- Phoenix Phoenix (4) — 12,500 — — 732 — 12,998 — 234 13,232 (1 ) 2017 (C) 330 E. Cermak Road Chicago — 25,248 — — (1 ) — 25,247 — — 25,247 — 2017 (C) 10000-10006 Godwin Drive N. Virginia — 17,308 — — 2,990 — 18,239 — 2,059 20,298 — 2018 (C) 2825-2845 Lafayette Street Silicon Valley — 56,000 — 2,941 60 — 56,000 — 3,001 59,001 (1,574 ) 2018 (C) 9905 Godwin Drive N. Virginia — 5,819 — — 1,583 — 7,402 — — 7,402 — 2018 (C) Pacific Boulevard and S. Sterling Boulevard N. Virginia — 27,139 — — 1,073 — 28,145 — 67 28,212 — 2018 (C) 160 Lockwood Road Sydney — 7,664 — — 54 — 7,718 — — 7,718 — 2018 (C) Western Lands N. Virginia — 238,141 — — 1,694 — 239,835 — — 239,835 — 2018 (C) Osaka 4 Osaka — 4,633 — — 140 — 4,773 — — 4,773 — 2018 (C) Ascenty Brazil 600,000 — — 425,000 — — — — 425,000 425,000 — 2018 (A) Other — 8,298 — 61,236 — — — 69,534 69,534 (11,510 ) $ 705,777 $ 1,476,672 $ 13,509 $ 9,424,451 $ 7,925,253 $ — $ 1,509,764 $ 10,575 $ 17,319,546 $ 18,839,885 $ (3,935,267 ) (1) The balance shown excludes an unamortized premium of $147 . (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 $19.4 billion (unaudited) as of December 31, 2018 . (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, 2018 . Year Ended December 31, 2018 2017 2016 Balance, beginning of year $ 16,915,936 $ 11,558,469 $ 10,915,373 Additions during period (acquisitions and improvements) 2,008,032 5,663,404 760,051 Deductions during period (dispositions, impairments and assets held for sale) (84,083 ) (305,937 ) (116,955 ) Balance, end of year $ 18,839,885 $ 16,915,936 $ 11,558,469 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, 2018 . Year Ended December 31, 2018 2017 2016 Balance, beginning of year $ 3,238,227 $ 2,668,509 $ 2,251,268 Additions during period (depreciation and amortization expense) 714,336 612,970 461,506 Deductions during period (dispositions and assets held for sale) (17,296 ) (43,252 ) (44,265 ) Balance, end of year $ 3,935,267 $ 3,238,227 $ 2,668,509 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.
Digital Realty Trust, L.P.
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Properties And Accumulated Depreciation	Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 36 NE 2nd Street Miami — 1,942 — 24,184 28,408 — 1,970 — 52,564 54,534 (17,441 ) 2002 (A) 2323 Bryan Street Dallas — 1,838 — 77,604 55,942 — 1,838 — 133,546 135,384 (71,792 ) 2002 (A) 300 Boulevard East New York — 5,140 — 48,526 62,649 — 5,140 — 111,175 116,315 (67,848 ) 2002 (A) 2334 Lundy Place Silicon Valley — 3,607 — 23,008 67 — 3,607 — 23,075 26,682 (10,813 ) 2002 (A) 2440 Marsh Lane Dallas — 1,477 — 10,330 73,754 — 1,486 — 84,075 85,561 (67,865 ) 2003 (A) 375 Riverside Parkway Atlanta — 1,250 — 11,578 31,704 — 1,250 — 43,282 44,532 (31,210 ) 2003 (A) 4849 Alpha Road Dallas — 2,983 — 10,650 44,045 — 2,983 — 54,695 57,678 (33,311 ) 2004 (A) 600 West Seventh Street Los Angeles — 18,478 — 50,824 64,912 — 18,489 — 115,725 134,214 (68,601 ) 2004 (A) 2045 & 2055 Lafayette Street Silicon Valley — 6,065 — 43,817 45 — 6,065 — 43,862 49,927 (19,242 ) 2004 (A) 11830 Webb Chapel Road Dallas — 5,881 — 34,473 2,355 — 5,881 — 36,828 42,709 (17,373 ) 2004 (A) 150 South First Street Silicon Valley — 2,068 — 29,214 1,499 — 2,068 — 30,713 32,781 (13,631 ) 2004 (A) 200 Paul Avenue San Francisco — 14,427 — 75,777 121,670 — 14,498 — 197,376 211,874 (87,390 ) 2004 (A) 1100 Space Park Drive Silicon Valley — 5,130 — 18,206 43,082 — 5,130 — 61,288 66,418 (34,035 ) 2004 (A) 3015 Winona Avenue Los Angeles — 6,534 — 8,356 6 — 6,534 — 8,362 14,896 (3,825 ) 2004 (A) 350 East Cermak Road Chicago — 8,466 — 103,232 236,679 — 8,620 — 339,757 348,377 (223,795 ) 2005 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 8534 Concord Center Drive Denver — 2,181 — 11,561 763 — 2,181 — 12,324 14,505 (5,537 ) 2005 (A) 2401 Walsh Street Silicon Valley — 5,775 — 19,267 37 — 5,775 — 19,304 25,079 (8,868 ) 2005 (A) 2403 Walsh Street Silicon Valley — 5,514 — 11,695 48 — 5,514 — 11,743 17,257 (5,675 ) 2005 (A) 200 North Nash Street Los Angeles — 4,562 — 12,503 232 — 4,562 — 12,735 17,297 (6,734 ) 2005 (A) 731 East Trade Street Charlotte 1,777 (1) 1,748 — 5,727 267 — 1,748 — 5,994 7,742 (2,599 ) 2005 (A) 113 North Myers Charlotte — 1,098 — 3,127 4,762 — 1,098 — 7,889 8,987 (2,493 ) 2005 (A) 125 North Myers Charlotte — 1,271 — 3,738 6,337 — 1,271 — 10,075 11,346 (7,697 ) 2005 (A) Paul van Vlissingenstraat 16 Amsterdam — — — 15,255 26,722 — — — 41,977 41,977 (20,320 ) 2005 (A) 600-780 S. Federal Chicago — 7,849 — 27,881 35,990 — 7,975 — 63,745 71,720 (18,818 ) 2005 (A) 115 Second Avenue Boston — 1,691 — 12,569 11,458 — 1,691 — 24,027 25,718 (15,050 ) 2005 (A) Chemin de l’Epinglier 2 Geneva — — — 20,071 (558 ) — — — 19,513 19,513 (8,220 ) 2005 (A) 7500 Metro Center Drive Austin — 1,177 — 4,877 69,483 — 1,177 — 74,360 75,537 (13,685 ) 2005 (A) 3 Corporate Place New York — 1,543 — 12,678 86,885 — 1,543 — 99,563 101,106 (85,242 ) 2005 (A) 1115 Centennial Avenue New York — 581 — — 58,109 — 581 — 58,109 58,690 (448 ) 2005 (C) 4025 Midway Road Dallas — 2,196 — 14,037 30,842 — 2,196 — 44,879 47,075 (30,901 ) 2006 (A) Clonshaugh Industrial Estate Dublin — — 1,444 5,569 1,685 — — 95 8,603 8,698 (5,526 ) 2006 (A) 6800 Millcreek Drive Toronto — 1,657 — 11,352 2,285 — 1,657 — 13,637 15,294 (6,984 ) 2006 (A) 101 Aquila Way Atlanta — 1,480 — 34,797 (11,162 ) — 1,556 — 23,559 25,115 — 2006 (A) Digital Houston Houston — 6,965 — 23,492 148,984 — 6,965 — 172,476 179,441 (70,198 ) 2006 (A) 120 E Van Buren Phoenix — 4,524 — 157,822 120,452 — 4,524 — 278,274 282,798 (138,607 ) 2006 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: Gyroscoopweg 2E-2F Amsterdam — — — 13,450 (1,376 ) — — — 12,074 12,074 (5,113 ) 2006 (A) Clonshaugh Industrial Estate II Dublin — — — — 79,116 — — — 79,116 79,116 (47,814 ) 2006 (C) 600 Winter Street Boston — 1,429 — 6,228 456 — 1,429 — 6,684 8,113 (2,604 ) 2006 (A) 2300 NW 89th Place Miami — 1,022 — 3,767 19 — 1,022 — 3,786 4,808 (1,723 ) 2006 (A) 2055 East Technology Circle Phoenix — — — 8,519 30,060 — — — 38,579 38,579 (30,232 ) 2006 (A) Unit 9, Blanchardstown Corporate Park Dublin — 1,927 — 40,024 24,651 — 1,660 — 64,942 66,602 (26,209 ) 2006 (A) 111 8th Avenue New York — — — 17,688 27,230 — — — 44,918 44,918 (31,402 ) 2006 (A) 8100 Boone Boulevard N. Virginia — — — 158 2,034 — — — 2,192 2,192 (2,192 ) 2006 (A) 21110 Ridgetop Circle N. Virginia — 2,934 — 14,311 1,307 — 2,934 — 15,618 18,552 (5,991 ) 2007 (A) 3011 Lafayette Street Silicon Valley — 3,354 — 10,305 52,300 — 3,354 — 62,605 65,959 (51,360 ) 2007 (A) 44470 Chilum Place N. Virginia — 3,531 — 37,360 1 — 3,531 — 37,361 40,892 (12,144 ) 2007 (A) 43881 Devin Shafron Drive N. Virginia — 4,653 — 23,631 96,033 — 4,653 — 119,664 124,317 (96,517 ) 2007 (A) 43831 Devin Shafron Drive N. Virginia — 3,027 — 16,247 1,382 — 3,027 — 17,629 20,656 (6,485 ) 2007 (A) 43791 Devin Shafron Drive N. Virginia — 3,490 — 17,444 77,914 — 3,490 — 95,358 98,848 (61,691 ) 2007 (A) Mundells Roundabout London — 31,354 — — 41,294 — 20,330 — 52,318 72,648 (13,558 ) 2007 (C) 1500 Space Park Drive Silicon Valley — 6,732 — 6,325 46,277 — 4,106 — 55,228 59,334 (53,527 ) 2007 (A) Cressex 1 London — 3,629 — 9,036 19,302 — 2,452 — 29,515 31,967 (20,732 ) 2007 (A) Naritaweg 52 Amsterdam — — 1,192 23,441 (5,129 ) — — 937 18,567 19,504 (6,048 ) 2007 (A) 1 St. Anne’s Boulevard London — 1,490 — 1,045 (804 ) — 976 — 755 1,731 (210 ) 2007 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 2 St. Anne’s Boulevard London — 922 — 695 32,979 — 650 — 33,946 34,596 (6,437 ) 2007 (A) 3 St. Anne’s Boulevard London — 22,079 — 16,351 79,708 — 14,335 — 103,803 118,138 (60,140 ) 2007 (A) 365 South Randolphville Road New York — 3,019 — 17,404 301,969 — 3,023 — 319,369 322,392 (133,568 ) 2008 (A) 701 & 717 Leonard Street Dallas — 2,165 — 9,934 835 — 2,165 — 10,769 12,934 (3,255 ) 2008 (A) Manchester Technopark Manchester — — — 23,918 (8,161 ) — — — 15,757 15,757 (4,763 ) 2008 (A) 1201 Comstock Street Silicon Valley — 2,093 — 1,606 26,945 — 3,398 — 27,246 30,644 (20,433 ) 2008 (A) 1550 Space Park Drive Silicon Valley — 2,301 — 766 2,649 — 5,716 — — 5,716 — 2008 (A) 1525 Comstock Street Silicon Valley — 2,293 — 16,216 31,131 — 2,061 — 47,579 49,640 (34,656 ) 2008 (C) 43830 Devin Shafron Drive N. Virginia — 5,509 — — 74,916 — 5,509 — 74,916 80,425 (43,316 ) 2009 (C) 1232 Alma Road Dallas — 2,267 — 3,740 65,647 — 2,266 — 69,388 71,654 (43,853 ) 2009 (A) 900 Quality Way Dallas — 1,446 — 1,659 69,489 — 1,437 — 71,157 72,594 (21,533 ) 2009 (A) 1210 Integrity Drive Dallas — 2,041 — 3,389 189,102 — 3,472 — 191,060 194,532 (6,435 ) 2009 (A) 907 Security Row Dallas — 333 — 344 97,744 — 2,112 — 96,309 98,421 (9,228 ) 2009 (A) 908 Quality Way Dallas — 6,730 — 4,493 13,948 — 2,067 — 23,104 25,171 (18,441 ) 2009 (A) 904 Quality Way Dallas — 760 — 744 6,819 — 1,151 — 7,172 8,323 (1,194 ) 2009 (A) 1215 Integrity Drive Dallas — — — — 69,836 — 995 — 68,841 69,836 (18,600 ) 2009 (C) 1350 Duane & 3080 Raymond Silicon Valley — 7,081 — 69,817 354 — 7,081 — 70,171 77,252 (16,611 ) 2009 (A) 45901 & 45845 Nokes Boulevard N. Virginia — 3,437 — 28,785 450 — 3,437 — 29,235 32,672 (7,366 ) 2009 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 21561 & 21571 Beaumeade Circle N. Virginia — 3,966 — 24,211 45 — 3,966 — 24,256 28,222 (5,631 ) 2009 (A) 60 & 80 Merritt New York — 3,418 — 71,477 97,152 — 3,418 — 168,629 172,047 (41,819 ) 2010 (A) 55 Middlesex Boston — 9,975 — 68,363 14,043 — 9,975 — 82,406 92,381 (25,924 ) 2010 (A) 128 First Avenue Boston — 5,465 — 185,348 37,493 — 5,465 — 222,841 228,306 (71,312 ) 2010 (A) Cateringweg 5 Amsterdam — — 3,518 3,517 38,829 — — 3,296 42,568 45,864 (8,480 ) 2010 (A) 1725 Comstock Street Silicon Valley — 3,274 — 6,567 39,190 — 3,274 — 45,757 49,031 (25,913 ) 2010 (A) 3105 Alfred Street Silicon Valley — 6,533 — 3,725 123,928 — 6,532 — 127,654 134,186 (31,190 ) 2010 (A) 365 Main Street San Francisco — 22,854 — 158,709 29,725 — 22,854 — 188,434 211,288 (53,717 ) 2010 (A) 720 2nd Street San Francisco — 3,884 — 116,861 10,865 — 3,884 — 127,726 131,610 (33,071 ) 2010 (A) 2260 East El Segundo Los Angeles — 11,053 — 51,397 15,774 — 11,053 — 67,171 78,224 (20,837 ) 2010 (A) 2121 South Price Road Phoenix — 7,335 — 238,452 213,355 — 7,335 — 451,807 459,142 (128,398 ) 2010 (A) 4030 Lafayette N. Virginia — 2,492 — 16,912 10,372 — 2,492 — 27,284 29,776 (6,863 ) 2010 (A) 4040 Lafayette N. Virginia — 1,246 — 4,267 24,717 — 1,246 — 28,984 30,230 (4,778 ) 2010 (A) 4050 Lafayette N. Virginia — 1,246 — 4,371 35,994 — 1,246 — 40,365 41,611 (23,551 ) 2010 (A) 2805 Lafayette Street Silicon Valley — 8,976 — 18,155 130,422 — 8,294 — 149,259 157,553 (31,988 ) 2010 (A) 29A International Business Park Singapore — — — 137,545 213,162 — — — 350,707 350,707 (128,018 ) 2010 (A) 43940 Digital Loudoun Plaza N. Virginia — 6,229 — — 284,883 — 7,524 — 283,588 291,112 (74,154 ) 2011 (C) 44060 Digital Loudoun Plaza N. Virginia — 3,700 — — 187,226 — 3,441 — 187,485 190,926 (24,690 ) 2011 (C) 44100 Digital Loudoun Plaza N. Virginia — 3,700 — — 140,869 — 3,493 — 141,076 144,569 (11,587 ) 2011 (C) 43780 Digital Loudoun Plaza N. Virginia — 3,671 — — 122,489 — 4,186 — 121,974 126,160 (6,976 ) 2011 (C) 1-11 Templar Road Sydney — 6,937 — — 62,870 — 4,367 — 65,440 69,807 (15,816 ) 2011 (C) 13-23 Templar Road Sydney 4,236 — — 68,074 — 3,530 — 68,780 72,310 (137 ) 2011 (C) Fountain Court London — 7,544 — 12,506 94,180 — 6,319 — 107,911 114,230 (24,250 ) 2011 (A) 72 Radnor Drive Melbourne — 2,568 — — 66,203 — 1,749 — 67,022 68,771 (9,947 ) 2011 (C) 98 Radnor Drive Melbourne — 1,899 — — 35,692 — 1,345 — 36,246 37,591 (15,159 ) 2011 (C) 105 Cabot Street Boston — 2,386 — — 59,267 — 2,448 — 59,205 61,653 (9,257 ) 2011 (C) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total PROPERTIES: 3825 NW Aloclek Place Portland — 1,689 — — 58,153 — 1,689 — 58,153 59,842 (21,249 ) 2011 (C) Profile Park Dublin — 6,288 — — 73,579 — 9,573 — 70,294 79,867 (3,982 ) 2011 (C) 760 Doug Davis Drive Atlanta — 4,837 — 53,551 3,373 — 4,837 — 56,924 61,761 (13,384 ) 2011 (A) 2501 S. State Hwy 121 Dallas — 23,137 — 93,943 19,180 — 24,612 — 111,648 136,260 (31,141 ) 2012 (A) 9333 Grand Avenue Chicago — 5,686 — 14,515 74,579 — 1,205 — 93,575 94,780 (34,196 ) 2012 (A) 9355 Grand Avenue Chicago — — — 227,902 — 2,518 — 225,384 227,902 (22,298 ) 2012 (A) 9377 Grand Avenue Chicago — — — 123,953 — 2,137 — 121,816 123,953 (3,683 ) 2012 (A) 850 E Collins Dallas — 1,614 — — 85,337 — 1,614 — 85,337 86,951 (19,313 ) 2012 (C) 950 E Collins Dallas — 1,546 — — 75,284 — 1,546 — 75,284 76,830 (12,178 ) 2012 (C) 400 S. Akard Dallas — 10,075 — 62,730 2,657 — 10,075 — 65,387 75,462 (11,686 ) 2012 (A) 410 Commerce Boulevard New York — — — — 30,212 — — — 30,212 30,212 (12,866 ) 2012 (C) Croydon London — 1,683 — 104,728 40,542 — 2,277 — 144,676 146,953 (26,060 ) 2012 (A) Watford London — — 7,355 219,273 (6,852 ) — — 6,247 213,529 219,776 (39,423 ) 2012 (A) Unit 21 Goldsworth Park London — 17,334 — 928,129 (159,279 ) — 12,735 — 773,449 786,184 (147,488 ) 2012 (A) 11900 East Cornell Denver — 3,352 — 80,640 2,796 — 3,352 — 83,436 86,788 (17,330 ) 2012 (A) 701 Union Boulevard New York — 10,045 — 6,755 25,274 — 42,074 — — 42,074 — 2012 (A) 23 Waterloo Road Sydney — 7,112 — 3,868 (3,534 ) — 4,823 — 2,623 7,446 (436 ) 2012 (A) 1 Rue Jean-Pierre Paris — 9,621 — 35,825 (5,945 ) — 8,362 — 31,139 39,501 (6,777 ) 2012 (A) Liet-dit le Christ de Saclay Paris — 3,402 — 3,090 (849 ) — 2,957 — 2,686 5,643 (754 ) 2012 (A) 127 Rue de Paris Paris — 8,637 — 10,838 (2,548 ) — 7,507 — 9,420 16,927 (2,551 ) 2012 (A) 17201 Waterview Parkway Dallas — 2,070 — 6,409 42 — 2,070 — 6,451 8,521 (1,253 ) 2013 (A) 1900 S. Price Road Phoenix — 5,380 — 16,975 982 — 5,512 — 17,825 23,337 (2,217 ) 2013 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total 371 Gough Road Toronto — 7,394 677 87,318 — 5,560 — 89,829 95,389 (9,855 ) 2013 (A) 1500 Towerview Road Minneapolis — 10,190 20,054 3,191 — 10,190 — 23,245 33,435 (4,857 ) 2013 (A) Principal Park London — 11,837 — 104,084 — 12,343 — 103,578 115,921 (9,625 ) 2013 (C) Liverpoolweg 10 Amsterdam — 733 3,122 9,730 — 644 — 12,941 13,585 (2,482 ) 2013 (A) DePresident Amsterdam — 6,737 — 117,156 — 7,858 — 116,035 123,893 (2,506 ) 2013 (C) Crawley 2 London — 24,305 — 60,285 — 26,637 — 57,953 84,590 (463 ) 2014 (C) Digital Deer Park 3 Melbourne — 1,600 — — 3 — 1,603 — — 1,603 — 2015 (C) 3 Loyang Way Singapore — — — — 168,365 — — — 168,365 168,365 (3,961 ) 2015 (A) Digital Loudoun III N. Virginia — 43,000 — — 572,790 — 60,358 — 555,432 615,790 (6,648 ) 2015 (C) Digital Frankfurt Frankfurt — 5,543 — — 101,172 — 9,987 — 96,728 106,715 (934 ) 2015 (C) 56 Marietta Street Atlanta (2) — 1,700 — 211,397 22,788 — 1,700 — 234,185 235,885 (30,981 ) 2015 (A) 2 Peekay Drive New York (2) — — — 115,439 38,235 — — — 153,674 153,674 (25,011 ) 2015 (A) 100 Delawanna Avenue New York (2) — 3,600 — 85,438 7,043 — 3,600 — 92,481 96,081 (10,686 ) 2015 (A) 60 Hudson Street New York (2) — — — 32,280 13,709 — — — 45,989 45,989 (12,278 ) 2015 (A) 32 Avenue of the Americas New York (2) — — — 30,980 3,457 — — — 34,437 34,437 (8,693 ) 2015 (A) 3433 S 120th Place Seattle (2) — — — 11,688 2,324 — — — 14,012 14,012 (4,818 ) 2015 (A) 8435 Stemmons Freeway Dallas (2) — — — 5,023 2,236 — — — 7,259 7,259 (2,097 ) 2015 (A) 2625 Walsh Avenue Silicon Valley (2) — — — 4,276 7,768 — — — 12,044 12,044 (2,626 ) 2015 (A) 111 8th Avenue - Telx New York (2) — — — 42,454 14,422 — — 56,876 56,876 (16,822 ) 2015 (A) 350 East Cermak Road - Telx Chicago (2) — — — 13,933 8,163 — — — 22,096 22,096 (5,499 ) 2015 (A) 200 Paul Avenue - Telx San Francisco (2) — — — 6,719 3,322 — — — 10,041 10,041 (2,750 ) 2015 (A) 2323 Bryan Street - Telx Dallas (2) — — — 5,191 3,770 — — — 8,961 8,961 (2,578 ) 2015 (A) 600 W. 7th Street - Telx Los Angeles (2) — — — 3,689 5,096 — — — 8,785 8,785 (1,851 ) 2015 (A) 3825 NW Aloclek Place - Telx Portland (2) — — — 3,131 1,104 — — — 4,235 4,235 (1,316 ) 2015 (A) 120 E. Van Buren Street - Telx Phoenix (2) — — — 2,848 2,407 — — — 5,255 5,255 (1,299 ) 2015 (A) 36 NE 2nd Street - Telx Miami (2) — — — 1,842 2,806 — — — 4,648 4,648 (1,238 ) 2015 (A) 600-780 S. Federal Street - Telx Chicago (2) — — — 1,815 3,227 — — — 5,042 5,042 (1,035 ) 2015 (A) 113 N. Myers Street - Telx Charlotte (2) — — — 476 746 — — — 1,222 1,222 (268 ) 2015 (A) 1100 Space Park Drive - Telx Silicon Valley (2) — — — 352 1,122 — — — 1,474 1,474 (233 ) 2015 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total 300 Boulevard East - Telx New York (2) — — — 197 55 — — — 252 252 (139 ) 2015 (A) Science Park Amsterdam (3) — 665 — 75,095 22,517 — 693 — 97,584 98,277 (6,905 ) 2016 (A) Sovereign House London (3) — 7,943 — 75,184 36,988 — — — 120,115 120,115 (12,253 ) 2016 (A) Amstel Business Park Amsterdam (3) — 2,991 — 58,138 14,086 — 3,096 — 72,119 75,215 (14,666 ) 2016 (A) Olivers Yard London (3) — 7,943 — 34,744 1,353 — 7,780 — 36,260 44,040 (10,089 ) 2016 (A) Bonnington House London (3) — — — 14,127 72,272 — 174 — 86,225 86,399 (2,805 ) 2016 (A) West Drayton London (3) — — — 10,135 1,469 — — — 11,604 11,604 (4,750 ) 2016 (A) Lyonerstrasse Frankfurt (3) — — — 8,407 3,140 — — — 11,547 11,547 (3,568 ) 2016 (A) Meridian Gate London (3) — — — 5,893 692 — — — 6,585 6,585 (2,538 ) 2016 (A) NE Corner of Campbell Road and Ferris Road Dallas — 21,902 — — 795 — 22,685 — 12 22,697 — 2016 (C) 9401 West Grand Avenue Chicago — 12,500 — — 89,688 — 17,363 — 84,825 102,188 — 2016 (C) Broad Run Technology Park N. Virginia — 18,019 — — 14,998 — 27,963 — 5,054 33,017 — 2016 (C) 2425-2553 Edgington Street Chicago — 11,950 — 1,615 43 — 11,959 — 1,649 13,608 (99 ) 2017 (C) 44490 Chilum Place N. Virginia (4) — 4,180 — 76,745 1,166 — 4,180 — 77,911 82,091 (6,086 ) 2017 (A) 44520 Hastings Drive N. Virginia (4) 104,000 6,140 — 108,105 1,050 — 6,140 — 109,155 115,295 (8,271 ) 2017 (A) 44480 Hastings Drive N. Virginia (4) — 12,860 — 278,384 426 — 12,860 — 278,810 291,670 (21,536 ) 2017 (A) 44521 Hastings Drive N. Virginia (4) — 13,210 — 315,539 307 — 13,210 — 315,846 329,056 (24,425 ) 2017 (A) 44461 Chilum Place N. Virginia (4) — 9,620 — 249,371 282 — 9,620 — 249,653 259,273 (19,418 ) 2017 (A) 21625 Gresham Drive N. Virginia (4) — 17,500 — 448,968 74 — 17,500 — 449,042 466,542 (35,066 ) 2017 (A) 21745 Sir Timothy Drive N. Virginia (4) — 16,010 — 289,281 6,171 — 16,010 — 295,452 311,462 (17,418 ) 2017 (A) 21744 Sir Timothy Drive N. Virginia (4) — 10,523 — 50,411 176,111 — 10,739 — 226,306 237,045 (4,924 ) 2017 (A) 2200 Busse Road Chicago (4) — 17,270 — 384,558 1,251 — 17,270 — 385,809 403,079 (28,401 ) 2017 (A) 2299 Busse Road Chicago (4) — 12,780 — 348,348 (1,701 ) — 12,780 — 346,647 359,427 (26,551 ) 2017 (A) 1780 Business Center Drive N. Virginia (4) — 7,510 — 106,363 353 — 7,510 — 106,716 114,226 (7,275 ) 2017 (A) 8217 Linton Hall Road N. Virginia (4) — 22,340 — 81,985 343 — 22,340 — 82,328 104,668 (5,266 ) 2017 (A) 1400 East Devon Avenue Chicago (4) — 11,012 — 178,627 60,449 — 11,261 — 238,827 250,088 (6,732 ) 2017 (A) 2220 De La Cruz Blvd Silicon Valley (4) — 84,650 — 634,007 2,038 — 84,650 — 636,045 720,695 (43,502 ) 2017 (A) 1 Century Place Toronto (4) — 26,600 — 116,863 67,153 — 25,557 — 185,059 210,616 (1,001 ) 2017 (C) 505 North Railroad Avenue Chicago — 20,431 — 245,810 983 — 16,513 — 250,711 267,224 (6,441 ) 2017 (A) Metropolitan Encumbrances Initial costs Costs capitalized Total costs Accumulated Date of Acquisition Land Acquired Buildings and Improvements Carrying Land Acquired Buildings and Total 250 Williams Atlanta — — — — 24,088 — — — 24,088 24,088 (3,102 ) 2017 (C) CME Agreement Chicago — — — — 41,478 — — — 41,478 41,478 (14,659 ) 2017 (C) Osaka 2 Osaka — 13,593 — — 104,994 — 15,489 — 103,098 118,587 — 2017 (C) Osaka 3 Osaka — 4,713 — — 249 — 4,962 — — 4,962 — 2017 (C) De President II Amsterdam — 6,315 — — 2,905 — 7,095 — 2,125 9,220 — 2017 (C) Development Property -- N. Virginia N. Virginia (4) — 16,200 — 573 267 — 17,026 — 14 17,040 (2 ) 2017 (C) Development Property -- Portland Portland (4) — 11,672 — 5,924 8,798 — 12,179 — 14,215 26,394 (1 ) 2017 (C) Development Property -- Phoenix Phoenix (4) — 12,500 — — 732 — 12,998 — 234 13,232 (1 ) 2017 (C) 330 E. Cermak Road Chicago — 25,248 — — (1 ) — 25,247 — — 25,247 — 2017 (C) 10000-10006 Godwin Drive N. Virginia — 17,308 — — 2,990 — 18,239 — 2,059 20,298 — 2018 (C) 2825-2845 Lafayette Street Silicon Valley — 56,000 — 2,941 60 — 56,000 — 3,001 59,001 (1,574 ) 2018 (C) 9905 Godwin Drive N. Virginia — 5,819 — — 1,583 — 7,402 — — 7,402 — 2018 (C) Pacific Boulevard and S. Sterling Boulevard N. Virginia — 27,139 — — 1,073 — 28,145 — 67 28,212 — 2018 (C) 160 Lockwood Road Sydney — 7,664 — — 54 — 7,718 — — 7,718 — 2018 (C) Western Lands N. Virginia — 238,141 — — 1,694 — 239,835 — — 239,835 — 2018 (C) Osaka 4 Osaka — 4,633 — — 140 — 4,773 — — 4,773 — 2018 (C) Ascenty Brazil 600,000 — — 425,000 — — — — 425,000 425,000 — 2018 (A) Other — 8,298 — 61,236 — — — 69,534 69,534 (11,510 ) $ 705,777 $ 1,476,672 $ 13,509 $ 9,424,451 $ 7,925,253 $ — $ 1,509,764 $ 10,575 $ 17,319,546 $ 18,839,885 $ (3,935,267 ) (1) The balance shown excludes an unamortized premium of $147 . (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 $19.4 billion (unaudited) as of December 31, 2018 . (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, 2018 . Year Ended December 31, 2018 2017 2016 Balance, beginning of year $ 16,915,936 $ 11,558,469 $ 10,915,373 Additions during period (acquisitions and improvements) 2,008,032 5,663,404 760,051 Deductions during period (dispositions, impairments and assets held for sale) (84,083 ) (305,937 ) (116,955 ) Balance, end of year $ 18,839,885 $ 16,915,936 $ 11,558,469 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, 2018 . Year Ended December 31, 2018 2017 2016 Balance, beginning of year $ 3,238,227 $ 2,668,509 $ 2,251,268 Additions during period (depreciation and amortization expense) 714,336 612,970 461,506 Deductions during period (dispositions and assets held for sale) (17,296 ) (43,252 ) (44,265 ) Balance, end of year $ 3,935,267 $ 3,238,227 $ 2,668,509 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.

Subsequent Events Subsequent Ev

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

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	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	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, 2018 and 2017 , cash equivalents consist of investments in money market instruments. Financial instruments which potentially subject the Company to concentration of credit risk consist of cash and cash equivalents held in denominations subject to economic uncertainty and exchange rate volatility, such as Brazil.
Investments in Real Estate	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.
Investments in Unconsolidated Joint Ventures	Investments in Unconsolidated Joint Ventures The Company’s investments in unconsolidated joint ventures are accounted for using the equity method, whereby our investment is increased for capital contributed and our share of the joint venture's net income and decreased by distributions we receive and our share of any losses of the joint ventures. 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.
Impairment of Long-Lived and Finite-Lived Intangible Assets	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 real estate investment’s use and eventual disposition and compare that estimate to the carrying value of the property. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If our future undiscounted net cash flow evaluation indicates that we are unable to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property. These losses have a direct impact on our net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results in future periods. Since cash flows on properties considered to be long-lived assets to be held and used are considered on an undiscounted basis to determine whether the carrying value of a property is recoverable, our strategy of holding properties over the long-term directly decreases the likelihood of their carrying values not being recoverable and therefore requiring the recording of an impairment loss. If our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized and such loss could be material. If we determine that the asset fails the recoverability test, the affected assets must be reduced to their fair value. We generally estimate the fair value of rental properties utilizing a discounted cash flow analysis that includes projections of future revenues, expenses and capital improvement costs that a market participant would use based on the highest and best use of the asset, which is similar to the income approach that is commonly utilized by appraisers. In certain cases, we may supplement this analysis by obtaining outside broker opinions of value. In considering whether to classify a property as held for sale, the Company considers whether: (i) management has committed to a plan to sell the property; (ii) the property is available for immediate sale in its present condition; (iii) the Company has initiated a program to locate a buyer; (iv) the Company believes that the sale of the property is probable; (v) the Company is actively marketing the property for sale 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. Upon being classified as held for sale, the Company ceases all depreciation and amortization related to the property and it is recorded at the lower of its carrying amount or fair value less cost to sell. The assets and related liabilities of the property are classified separately on the consolidated balance sheets for the most recent reporting period. Only those assets held for sale 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 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 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 value of the real estate acquired is allocated to the acquired tangible assets, consisting primarily of land, building and tenant improvements, and identified intangible assets and liabilities, consisting of the value of above-market and below-market leases, value of in-place leases and acquired ground leases and in the case of a business combination, tenant relationship value, based in each case on their fair values. Loan premiums, in the case of above-market rate loans, or loan discounts, in the case of below-market loans, are recorded based on the fair value of any loans assumed in connection with acquiring the real estate. 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 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. 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. We estimate the fair value of the reporting unit using discounted cash flows. 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 exchange rates.
Capitalization of Costs	Capitalization of Costs Direct and indirect project costs that are clearly associated with the development of properties are capitalized as incurred. Project costs include all costs directly associated with the development of a property, including construction costs, interest, property taxes, insurance, legal fees and costs of personnel working on the project. Indirect costs that do not clearly relate to the projects under development are not capitalized and are charged to expense as incurred. Capitalization of costs begins when the activities necessary to get the development project ready for its intended use begins, which include costs incurred before the beginning of construction. Capitalization of costs ceases when the development project is substantially complete and ready for its intended use. Determining when a development project commences and when it is substantially complete and ready for its intended use involves a degree of judgment. We generally consider a development project to be substantially complete and ready for its intended use upon receipt of a certificate of occupancy. If and when development of a property is suspended pursuant to a formal change in the planned use of the property, we will evaluate whether the accumulated costs exceed the estimated value of the project and write off the amount of any such excess accumulated costs. For a development project that is suspended for reasons other than a formal change in the planned use of such property, the accumulated project costs are evaluated for impairment consistent with our impairment policies for long-lived assets. Capitalized costs are allocated to the specific components of a project that are benefited.
Deferred Leasing Costs	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.
Foreign Currency Translation	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	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 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	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	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 14) granted by us is being amortized on a straight-line basis over the expected service period. The fair value of share-based compensation awards that contain a market condition is measured using a Monte Carlo simulation method and not adjusted based on actual achievement of the market condition.
Derivative Instruments	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.
Income Taxes	Income Taxes Digital Realty Trust, Inc. has elected to be treated as a real estate investment trust (a “REIT”) for federal income tax purposes. As a REIT, Digital Realty Trust, Inc. generally is not required to pay federal corporate income tax to the extent taxable income is currently distributed to its stockholders. If Digital Realty Trust, Inc. fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax 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 and foreign income taxes to the extent there is taxable income. Accordingly, the Company recognizes current and deferred income taxes. 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, 2018 and 2017 , 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.
Presentation of Transactional-based 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 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.
Revenue Recognition	Revenue Recognition In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)", and since that date has issued several additional ASUs intended to clarify certain aspects of ASU No. 2014-09 and to provide for certain practical expedients entities may elect upon adoption. Collectively, these ASUs outline a single comprehensive model for entities to use in accounting for revenues arising from contracts with customers. 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 are presented under Topic 606, while prior period amounts are not adjusted and continue to be presented under Topic 605. Our financial statements did not recognize a material effect from the cumulative impact of adopting Topic 606 as the new accounting standard does not impact lessor accounting. The majority of our revenue is derived from lease arrangements, which we account for in accordance with “Leases (Topic 840)”. We account for the non-lease components within our lease arrangements, as well as other sources of revenue, in accordance with Topic 606. Revenue recognized as a result of applying Topic 840 was 97% and Topic 606 was 3% of total operating revenue for the year ended December 31, 2018 . 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. Tenant reimbursements for real estate taxes, common area maintenance, and other recoverable costs under our leases are recognized in the period that the expenses are incurred. Lease termination fees are recognized over the remaining term of the lease, effective as of the date the lease modification is finalized, assuming collection is not considered doubtful. As discussed above, we recognize amortization of the value of acquired above or below-market tenant leases as a reduction of rental revenue in the case of above-market leases or an increase to rental revenue in the case of below-market leases. During the year ended December 31, 2016, we recognized a non-cash gain on lease termination of approximately $29.2 million , as one of our tenants, as part of a lease termination, conveyed substantially all of its colocation and turn-key improvements to the Company. 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 if 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. We make subjective estimates as to when our revenue is earned and the collectability of our accounts receivable related to minimum rent, deferred rent, expense reimbursements, lease termination fees and other income. We specifically analyze accounts receivable and historical bad debts, customer concentrations, customer creditworthiness and current economic trends when evaluating the adequacy of the allowance for bad debts. These estimates have a direct impact on our net revenue because a higher bad debt allowance would result in lower net revenue, and recognizing rental revenue as earned in one period versus another would result in higher or lower net revenue for a particular period.
Asset Retirement Obligations	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.
Assets and Liabilities Measured at Fair Value	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 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 Sale of Properties	Gains on Sale of Properties As of January 1, 2018, we began accounting for the sale 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. During the year ended December 31, 2018 , the Company sold real estate properties for gross proceeds of $291.7 million , and a recorded net gain of $80.4 million .
Management's Estimates	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	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.
Reclassifications	Reclassifications Certain reclassifications to prior year amounts have been made to conform to the current year presentation.
New Accounting Pronouncements	New Accounting Pronouncements New Accounting Standards Adopted In August 2017, the FASB issued ASU No. 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities". The new standard amends the hedge accounting recognition and presentation requirements in Accounting Standards Codification, or ASC, 815. As permitted by ASU No. 2017-12, the Company early adopted this standard in the first quarter of 2018 on a prospective basis. Refer to Note 2(o), Derivative Instruments, for our policy related to the adoption of this standard. In August 2016, the FASB issued ASU No. 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments". The new standard provides guidance on the classification in the statement of cash flows of cash distributions received from equity method investments, including unconsolidated joint ventures. The ASU provides two approaches to determine the classification of cash distributions received from equity method investees: (i) the “cumulative earnings” approach, under which distributions up to the amount of cumulative equity in earnings recognized are classified as cash inflows from operating activities, and those in excess of that amount are classified as cash inflows from investing activities, and (ii) the “nature of the distribution” approach, under which distributions are classified based on the nature of the underlying activity that generated cash distributions. An entity could elect either the “cumulative earnings” or the “nature of the distribution” approach. If the “nature of the distribution” approach is elected and the entity lacks the information necessary to apply it in the future, that entity will have to apply the “cumulative earnings” approach as an accounting change on a retrospective basis. We adopted this ASU using the “nature of the distribution” approach and applied it retrospectively, as required by the ASU. We previously presented distributions from our equity method investees by utilizing the “nature of the distribution” approach; therefore, the adoption of this ASU had no effect on our consolidated financial statements. In January 2016, the FASB issued ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities". The guidance requires entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value and to record changes in instruments specific credit risk for financial liabilities measured under the fair value option in other comprehensive income. The principal effect of ASU No. 2016-01 on our consolidated financial statements is that, prior to adoption of ASU No. 2016-01, changes in the fair values of investments in equity securities with readily determinable fair values or redemption values were recognized in other comprehensive income until realized, while under ASU No. 2016-01 all changes in the fair values of these equity securities are recognized in current earnings. The update is effective for fiscal years beginning after December 15, 2017, and for interim periods therein. We adopted this standard in the first quarter of 2018 and the adoption did not have a material impact on our consolidated financial statements. New Accounting Standards Issued but not yet Adopted In February 2016, FASB issued ASU No. 2016-02, “Leases”, and since that date has issued 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 recognition, measurement, presentation, and disclosure of leases for both parties to a lease agreement (i.e., lessees and lessors) and supersedes the previous leases standard, Leases (Topic 840). The standard is effective for the Company on January 1, 2019. Upon adoption of Topic 842, we plan to elect the following practical expedients provided in the 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 nonlease 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 nonlease components associated with that lease under Topic 842 as a single lease component, if certain criteria are met, for all classes of underlying assets; • 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. Topic 842 requires use of a modified retrospective transition method. On January 1, 2019 we plan to adopt Topic 842, electing the package of transition practical expedients and the optional transition method to apply the transition provisions from the effective date of adoption. Election of the package of transition practical expedients shall allow us not to reassess the following: • 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; • Treatment of initial direct costs relating to any existing leases as of January 1, 2019. We shall apply the package of transition practical expedients consistently to all leases (i.e., in which we are a lessee or a lessor) that commenced before January 1, 2019. Election of this expedient permits us to “run off” our leases that commenced before January 1, 2019, for the remainder of their lease terms pursuant to Topic 840 and to apply Topic 842 to leases commencing or modified after January 1, 2019. In addition, pursuant to our planned election of the land easement practical expedient, in transition we shall continue to account for land easements existing as of January 1, 2019 under the accounting standards applied to them prior to January 1, 2019. Additionally, we do not plan to elect the transition practical expedient to use hindsight in determining the lease term for our leases, existing as of January 1, 2019 and in assessing impairment of right-of-use assets. We acquired Ascenty on December 20, 2018, and management is currently assessing the impact of Topic 842 from both a lessor and lessee perspective. Lessee accounting Topic 842 requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle whether the lease transfers control to the lessee, and is in substance, a financed purchase of the underlying asset by the lessee. Topic 842 also requires lessees to record a right-of-use asset and a lease liability for all leases with a term greater than 12 months regardless of their classification. Accounting for leases with a term of 12 months or less will be similar to existing guidance for operating leases under Topic 840. Interest and amortization expense are recognized for finance leases while a single lease expense is recognized for operating leases, on a straight-line basis. As we plan our election of the package of transition practical expedients, operating and capital leases existing as of January 1, 2019, for which we are the lessee, shall continue to be classified as operating and finance leases, respectively, subsequent to adoption of Topic 842. In applying the transition provisions to our operating leases, we shall measure lease liabilities at the present value of the sum of remaining minimum rental payments (as defined under Topic 840) using our incremental borrowing rates as of January 1, 2019. We shall measure right-of-use assets for our operating leases at the initial measurement of applicable lease liabilities adjusted for other related lease balances at transition. At January 1, 2019, we estimate we shall recognize the following for our operating leases: lease liabilities between $700.0 million and $900.0 million and right-of-use assets between $625.0 million and $825.0 million . In applying the transition provisions to our capital leases, at the effective date, we shall measure lease liabilities and right-of-use assets for finance leases at the carrying amount of capital lease obligations and capital lease assets under Topic 840, respectively. Additionally, we shall apply the transition provisions 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, at January 1, 2019 we shall derecognize assets and liabilities for build-to-suit leases where construction had completed, with the difference recorded as an increase to accumulated dividends in excess of earnings at the adoption date. We shall account for these leases from January 1, 2019 following the lessee transition guidance. Lessor accounting Under Topic 840 our leases are classified as operating leases, and we recognize rental revenue on a straight-line basis over respective lease terms. Under Topic 840 we consider tenant reimbursements for real estate taxes, common area maintenance, and other recoverable costs as lease components. Generally, we recognize these tenant recoveries as revenue when services are rendered in an amount equal to related operating expenses incurred that are recoverable under the terms of applicable leases. Refer to Note 2(s), Revenue Recognition, for further details on our policies around Revenue Recognition. For leases entered into on or after January 1, 2019, Topic 842 shall require an entity to identify and separate lease and nonlease components with contract consideration allocated to identified components based on relative stand-alone selling prices. Topic 842 shall govern the recognition of revenue for lease components, and Topic 606 shall govern the recognition of revenue for nonlease components. Under Topic 842, tenant reimbursements for common area maintenance, inclusive of utilities, shall be considered nonlease components. 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 plan to elect the practical expedient to account for a lease component and nonlease component(s) associated with that lease as a single component if (i) the timing and pattern of transfer of the lease component and the nonlease component(s) associated with it are the same and (ii) the lease component would be classified as an operating lease if it were accounted for separately. If we determine the lease component is the predominant component, we shall account for the single component as an operating lease in accordance with Topic 842. Conversely, we shall account for the combined component under Topic 606 if we determine the nonlease component is the predominant component. We expect ope rating leases commencing or modified on or after January 1, 2019, for which we are a lessor, shall qualify for the single component practical expedient with the combined component accounted for under Topic 842. Topic 842 requires lessors to account for leases using an approach that is substantially similar to existing guidance for sales-type leases, direct financing leases and operating leases. Under Topic 842, the criteria to determine whether a lease should be accounted for as a sales-type lease includes 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, including any lessee guaranteed residual value, equals or exceeds substantially all of the fair value of the underlying asset, and (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 sales-type lease by the lessor. If none of the criteria are met, a lease may qualify as a direct financing lease or an operating lease. 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. We are still evaluating the impact of this standard on its financial statements as a lessor. Initial direct costs Topic 842 requires lessees and lessors to capitalize, as initial direct costs, incremental costs of a lease that would not have been incurred if the lease had not been obtained. Effective January 1, 2019, costs we incur to negotiate or arrange a lease regardless of its outcome, such as fixed employee compensation, tax, or legal advice to negotiate lease terms, and costs related to advertising or soliciting potential tenants shall be expensed as incurred. We estimate approximately $37 million of initial direct costs capitalized in 2018 would have been expensed if Topic 842 had been in effect during 2018. Future expenses as a result of the change in the accounting for initial direct costs shall depend on future events not yet known; therefore, the ultimate impact on initial direct costs from adoption of Topic 842 might differ from our estimate. As we plan to elect the package of transition practical expedients under Topic 842, we shall not be required to reassess whether initial direct costs capitalized prior to adoption of Topic 842, in connection with leases that commenced prior to January 1, 2019, qualify for capitalization under Topic 842. Therefore, we shall continue to amortize these initial direct costs over corresponding lease terms. 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 interim and annual reporting periods beginning after December 15, 2019, 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 June 2018, the FASB issued ASU No. 2018-07, “Improvements to Nonemployee Share-Based Payment Accounting,” which more closely aligns the accounting for employee and nonemployee share-based payments. The standard will be effective for interim and annual reporting periods beginning after December 15, 2018. Early adoption is permitted, but no earlier than an entity’s adoption date of Topic 606. We do not expect the provisions of ASU No. 2018-07 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 financial statements.

Organization and Description _2

Organization and Description of Business (Tables)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Real Estate Properties	A summary of our data center portfolio as of December 31, 2018 and 2017 is as follows: Data Centers As of December 31, 2018 As of December 31, 2017 Region Operating Held for Sale Unconsolidated Joint Ventures Total Operating Held for Sale Unconsolidated Joint Ventures Total United States 131 — 14 145 131 (2 ) 7 14 152 Europe 38 — — 38 38 — — 38 Latin America 16 (1 ) — 16 — — — — Asia 3 — 4 7 3 — 4 7 Australia 5 — — 5 5 — — 5 Canada 3 — — 3 3 (2 ) — — 3 Total 196 — 18 214 180 7 18 205 (1) Includes 16 data centers acquired as part of the Ascenty Acquisition, eight of which are under construction. (2) Includes 15 data centers acquired as part of the merger with DuPont Fabros Technology, Inc., of which 14 are located in the United States and one is located in Canada. A summary of our investments in properties as of December 31, 2018 and 2017 is as follows: As of December 31, 2018 (in thousands) Property Type Land Acquired Buildings and Tenant Accumulated Net Internet Gateway Data Centers $ 101,964 $ — $ 2,137,458 $ 114,013 $ (885,315 ) $ 1,468,120 Data Centers (2) 1,391,585 10,575 14,502,437 460,247 (3,016,646 ) 13,348,198 Technology Manufacturing 11,959 — 1,582 76 (100 ) 13,517 Technology Office 2,091 — 23,104 — (18,441 ) 6,754 Other 2,165 — 80,629 — (14,765 ) 68,029 $ 1,509,764 $ 10,575 $ 16,745,210 $ 574,336 $ (3,935,267 ) $ 14,904,618 As of December 31, 2017 (in thousands) Property Type Land Acquired Buildings and Tenant Accumulated Net Internet Gateway Data Centers $ 109,844 $ — $ 1,940,495 $ 99,174 $ (778,659 ) $ 1,370,854 Data Centers (2) 1,010,306 11,150 13,147,042 453,712 (2,430,984 ) 12,191,226 Technology Manufacturing 11,959 — 1,564 76 (31 ) 13,568 Technology Office 2,067 — 23,029 — (16,779 ) 8,317 Other 2,165 — 103,275 78 (11,774 ) 93,744 $ 1,136,341 $ 11,150 $ 15,215,405 $ 553,040 $ (3,238,227 ) $ 13,677,709 (1) Balances include, as of December 31, 2018 and 2017 , $1.6 billion and $1.4 billion of direct and accrued costs associated with development in progress, respectively. (2) Balances include vacant land to support ground-up development.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Goodwill	The following is a summary of goodwill activity for the year ended December 31, 2018 (in thousands): Balance as of December 31, 2017 Merger / Acquisition Impact of Change in Foreign Exchange Rates Balance as of December 31, 2018 Merger / Portfolio Acquisition 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
Property, Plant and Equipment	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

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Summary of Preliminary Fair Value of Assets and Liabilities Acquired	A summary of the fair value of the assets and liabilities acquired for total equity of approximately $6.2 billion is as follows (in thousands): Fair Value Weighted Average Remaining Intangible Amortization Life (in months) Land $ 312,579 Buildings and improvements 3,677,497 Cash and cash equivalents 20,650 Accounts and other receivables 10,978 Acquired above-market leases 162,333 47 Goodwill 2,592,181 Acquired in-place lease value, deferred leasing costs and intangibles: Tenant relationship value 980,267 220 Acquired in-place lease value 557,128 70 Tenant origination costs 44,990 80 Global revolving credit facility, net (1) (450,697 ) Unsecured term loans (1) (250,000 ) Unsecured senior notes, net (2) (886,831 ) Mortgage loans (1) (105,000 ) Acquired below-market leases (185,543 ) 137 Accounts payable and other accrued liabilities (248,259 ) Other working capital, net (22,640 ) Total equity consideration for DFT merger $ 6,209,633 (1) Debt was paid off in full at closing of the DFT merger. (2) Approximately $621 million of fair value debt was paid off prior to September 30, 2017. The remainder was paid off in October 2017. 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, 2018 and 2017 (excluding business combinations already discussed in Note 3): 2018 Acquisitions Property Type Amount (2) Land Parcels (1) $ 296.1 Data Centers 114.6 $ 410.7 2017 Acquisitions Property Type Amount (2) Land Parcels (1) $ 55.3 Data Centers 346.2 Technology Manufacturing 14.3 $ 415.8 (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. Each of these acquisitions was accounted for as an asset acquisition pursuant to the adoption of ASU 2017-01 on January 1, 2017. The table below reflects the purchase price allocation for the above properties acquired in 2018 and 2017 (in thousands): Property Type Land Buildings and Improvements Tenant Improvements Above-Market Leases In-Place Leases Below-Market Leases Acquisition Date Fair Value 2018 Land Parcels $ 296,071 $ — $ — $ — $ — $ — $ 296,071 Data Centers 60,633 54,008 — — — — 114,641 Total $ 356,704 $ 54,008 $ — $ — $ — $ — $ 410,712 2017 Land Parcels $ 55,229 $ — $ — $ — $ — $ — $ 55,229 Data Centers 20,431 275,374 1,506 21,043 28,656 (811 ) 346,199 Technology Manufacturing 11,950 1,539 76 — 1,455 (684 ) 14,336 Total $ 87,610 $ 276,913 $ 1,582 $ 21,043 $ 30,111 $ (1,495 ) $ 415,764 Weighted average remaining intangible amortization life (in months) 65 81 80
Pro Forma Financial Information	The unaudited pro forma financial information set forth below is based on our historical consolidated income statements for the years ended December 31, 2017 and 2016, adjusted to give effect to the DFT Merger as if it occurred on January 1, 2016. The pro forma adjustments primarily relate to transaction expenses, depreciation expense on acquired buildings and improvements, amortization of acquired intangibles, and estimated interest expense related to financing transactions, the proceeds of which were used to fund the repayment of DFT debt in connection with the DFT merger. Digital Realty Trust, Inc. Pro forma (unaudited) (in thousands, except per share data) Year Ended December 31, 2017 2016 Total revenue $ 2,860,454 $ 2,670,914 Net income available to common stockholders (1) $ 51,717 $ 99,653 Income per share, diluted (2) $ 0.25 $ 0.51 Digital Realty Trust, L.P. Pro forma (unaudited) (in thousands, except per unit data) Year Ended December 31, 2017 2016 Total revenue $ 2,860,454 $ 2,670,914 Net income available to common unitholders (1) $ 53,786 $ 103,639 Income per unit, diluted (2) $ 0.25 $ 0.51 (1) Pro forma net income available to common stockholders was adjusted to exclude $43.0 million of merger-related costs incurred by the Company during the year ended December 31, 2017 and to include these charges in 2016. (2) Adjusted to give effect to the issuance of approximately 43.2 million shares of Digital Realty Trust, Inc. common stock in the DFT merger.

Investments in Real Estate (Tab

Investments in Real Estate (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Real Estate Properties	A summary of our data center portfolio as of December 31, 2018 and 2017 is as follows: Data Centers As of December 31, 2018 As of December 31, 2017 Region Operating Held for Sale Unconsolidated Joint Ventures Total Operating Held for Sale Unconsolidated Joint Ventures Total United States 131 — 14 145 131 (2 ) 7 14 152 Europe 38 — — 38 38 — — 38 Latin America 16 (1 ) — 16 — — — — Asia 3 — 4 7 3 — 4 7 Australia 5 — — 5 5 — — 5 Canada 3 — — 3 3 (2 ) — — 3 Total 196 — 18 214 180 7 18 205 (1) Includes 16 data centers acquired as part of the Ascenty Acquisition, eight of which are under construction. (2) Includes 15 data centers acquired as part of the merger with DuPont Fabros Technology, Inc., of which 14 are located in the United States and one is located in Canada. A summary of our investments in properties as of December 31, 2018 and 2017 is as follows: As of December 31, 2018 (in thousands) Property Type Land Acquired Buildings and Tenant Accumulated Net Internet Gateway Data Centers $ 101,964 $ — $ 2,137,458 $ 114,013 $ (885,315 ) $ 1,468,120 Data Centers (2) 1,391,585 10,575 14,502,437 460,247 (3,016,646 ) 13,348,198 Technology Manufacturing 11,959 — 1,582 76 (100 ) 13,517 Technology Office 2,091 — 23,104 — (18,441 ) 6,754 Other 2,165 — 80,629 — (14,765 ) 68,029 $ 1,509,764 $ 10,575 $ 16,745,210 $ 574,336 $ (3,935,267 ) $ 14,904,618 As of December 31, 2017 (in thousands) Property Type Land Acquired Buildings and Tenant Accumulated Net Internet Gateway Data Centers $ 109,844 $ — $ 1,940,495 $ 99,174 $ (778,659 ) $ 1,370,854 Data Centers (2) 1,010,306 11,150 13,147,042 453,712 (2,430,984 ) 12,191,226 Technology Manufacturing 11,959 — 1,564 76 (31 ) 13,568 Technology Office 2,067 — 23,029 — (16,779 ) 8,317 Other 2,165 — 103,275 78 (11,774 ) 93,744 $ 1,136,341 $ 11,150 $ 15,215,405 $ 553,040 $ (3,238,227 ) $ 13,677,709 (1) Balances include, as of December 31, 2018 and 2017 , $1.6 billion and $1.4 billion of direct and accrued costs associated with development in progress, respectively. (2) Balances include vacant land to support ground-up development.
Schedule of Real Estate Property Acquisitions	A summary of the fair value of the assets and liabilities acquired for total equity of approximately $6.2 billion is as follows (in thousands): Fair Value Weighted Average Remaining Intangible Amortization Life (in months) Land $ 312,579 Buildings and improvements 3,677,497 Cash and cash equivalents 20,650 Accounts and other receivables 10,978 Acquired above-market leases 162,333 47 Goodwill 2,592,181 Acquired in-place lease value, deferred leasing costs and intangibles: Tenant relationship value 980,267 220 Acquired in-place lease value 557,128 70 Tenant origination costs 44,990 80 Global revolving credit facility, net (1) (450,697 ) Unsecured term loans (1) (250,000 ) Unsecured senior notes, net (2) (886,831 ) Mortgage loans (1) (105,000 ) Acquired below-market leases (185,543 ) 137 Accounts payable and other accrued liabilities (248,259 ) Other working capital, net (22,640 ) Total equity consideration for DFT merger $ 6,209,633 (1) Debt was paid off in full at closing of the DFT merger. (2) Approximately $621 million of fair value debt was paid off prior to September 30, 2017. The remainder was paid off in October 2017. 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, 2018 and 2017 (excluding business combinations already discussed in Note 3): 2018 Acquisitions Property Type Amount (2) Land Parcels (1) $ 296.1 Data Centers 114.6 $ 410.7 2017 Acquisitions Property Type Amount (2) Land Parcels (1) $ 55.3 Data Centers 346.2 Technology Manufacturing 14.3 $ 415.8 (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. Each of these acquisitions was accounted for as an asset acquisition pursuant to the adoption of ASU 2017-01 on January 1, 2017. The table below reflects the purchase price allocation for the above properties acquired in 2018 and 2017 (in thousands): Property Type Land Buildings and Improvements Tenant Improvements Above-Market Leases In-Place Leases Below-Market Leases Acquisition Date Fair Value 2018 Land Parcels $ 296,071 $ — $ — $ — $ — $ — $ 296,071 Data Centers 60,633 54,008 — — — — 114,641 Total $ 356,704 $ 54,008 $ — $ — $ — $ — $ 410,712 2017 Land Parcels $ 55,229 $ — $ — $ — $ — $ — $ 55,229 Data Centers 20,431 275,374 1,506 21,043 28,656 (811 ) 346,199 Technology Manufacturing 11,950 1,539 76 — 1,455 (684 ) 14,336 Total $ 87,610 $ 276,913 $ 1,582 $ 21,043 $ 30,111 $ (1,495 ) $ 415,764 Weighted average remaining intangible amortization life (in months) 65 81 80
Schedule of Purchase Price Allocation	The table below reflects the purchase price allocation for the above properties acquired in 2018 and 2017 (in thousands): Property Type Land Buildings and Improvements Tenant Improvements Above-Market Leases In-Place Leases Below-Market Leases Acquisition Date Fair Value 2018 Land Parcels $ 296,071 $ — $ — $ — $ — $ — $ 296,071 Data Centers 60,633 54,008 — — — — 114,641 Total $ 356,704 $ 54,008 $ — $ — $ — $ — $ 410,712 2017 Land Parcels $ 55,229 $ — $ — $ — $ — $ — $ 55,229 Data Centers 20,431 275,374 1,506 21,043 28,656 (811 ) 346,199 Technology Manufacturing 11,950 1,539 76 — 1,455 (684 ) 14,336 Total $ 87,610 $ 276,913 $ 1,582 $ 21,043 $ 30,111 $ (1,495 ) $ 415,764 Weighted average remaining intangible amortization life (in months) 65 81 80
Schedule of Dispositions	We sold the following real estate properties during the years ended December 31, 2018 and 2017 : 2018 Dispositions Location Metro Area Date Sold Gross Proceeds (in millions) Gain (loss) on sale (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 2017 Dispositions Location Metro Area Date Sold Gross Proceeds (in millions) Gain on Sale (in millions) 8025 North Interstate 35 Austin August 10, 2017 $ 20.2 $ 9.6 44874 Moran Road (1) Northern Virginia October 6, 2017 34.0 15.6 1 Solutions Parkway St. Louis November 28, 2017 37.1 14.7 $ 91.3 $ 39.9 (1) The property was held in a consolidated joint venture in which the Company owned a 75% interest. The Company recognized a gain on the sale of approximately $11.7 million , net of noncontrolling interests.

Investments in Unconsolidated_2

Investments in Unconsolidated Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Summary of Financial Information for Joint Ventures	The following tables present summarized financial information for our joint ventures for the years ended December 31, 2018 , 2017 , and 2016 (in thousands): 2018 % Net Investment Total Mortgage Total Equity / Revenues Property Net Net 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 33 Chun Choi Street (Hong Kong) 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 ) 1101 Space Park Drive 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 2017 % Net Investment Total Mortgage Total Equity / Revenues Property Net Net 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 33 Chun Choi Street (Hong Kong) 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 ) 1101 Space Park Drive 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 2016 % Net Investment Total Mortgage Total Equity / Revenues Property Net Net Unconsolidated Joint Ventures 2001 Sixth Avenue 50.00 % $ 27,342 $ 43,258 $ 101,394 $ 106,241 $ (62,983 ) $ 45,518 $ (15,574 ) $ 29,944 $ 16,374 2020 Fifth Avenue 50.00 % 45,973 55,005 47,000 47,612 7,393 8,788 (1,500 ) 7,288 4,821 33 Chun Choi Street (Hong Kong) 50.00 % 134,249 184,855 — 3,291 181,564 18,856 (6,636 ) 12,220 6,315 PREI ® 20.00 % 409,876 468,298 207,270 288,325 179,973 41,075 (8,503 ) 32,572 13,615 GCEAR 20.00 % 116,949 162,863 101,477 104,393 58,470 19,742 (7,808 ) 11,934 (1,396 ) 1101 Space Park Drive 17.00 % 6,839 8,415 — 135 8,280 3,539 (4,105 ) (566 ) (1,515 ) Total Unconsolidated Joint Ventures $ 741,228 $ 922,694 $ 457,141 $ 549,997 $ 372,697 $ 137,518 $ (44,126 ) $ 93,392 $ 38,214 Our investment in and share of equity in earnings of unconsolidated joint ventures $ 106,402 $ 17,104

Acquired Intangible Assets an_2

Acquired Intangible Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Acquired Intangible Assets And Liabilities [Abstract]
Summary of Acquired Intangible Assets	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, 2018 and 2017 . Balance as of (Amounts in thousands) December 31, 2018 December 31, 2017 Acquired in-place lease value: Gross amount $ 1,569,401 $ 1,473,515 Accumulated amortization (795,033 ) (613,948 ) Net $ 774,368 $ 859,567 Tenant relationship value: Gross amount $ 2,339,606 $ 1,978,277 Accumulated amortization (291,818 ) (169,919 ) Net $ 2,047,788 $ 1,808,358 Acquired above-market leases: Gross amount $ 277,796 $ 294,514 Accumulated amortization (158,037 ) (110,139 ) Net $ 119,759 $ 184,375 Acquired below-market leases: Gross amount $ 442,535 $ 469,119 Accumulated amortization (242,422 ) (219,654 ) Net $ 200,113 $ 249,465
Schedule of Below Market Lease Future Amortization	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, 2019 is as follows: (Amounts in thousands) 2019 $ (15,323 ) 2020 (3,915 ) 2021 872 2022 7,898 2023 12,045 Thereafter 78,777 Total $ 80,354
Schedule of Finite-Lived Intangible Assets Future Amortization Expense	Estimated annual amortization of acquired in-place lease value for each of the five succeeding years and thereafter, commencing January 1, 2019 is as follows: (Amounts in thousands) 2019 $ 158,095 2020 123,450 2021 98,916 2022 77,056 2023 65,518 Thereafter 251,333 Total $ 774,368 Estimated annual amortization of tenant relationship value for each of the five succeeding years and thereafter, commencing January 1, 2019 is as follows: (Amounts in thousands) 2019 $ 143,818 2020 143,818 2021 143,818 2022 143,818 2023 143,818 Thereafter 1,328,698 Total $ 2,047,788

Debt of the Operating Partner_2

Debt of the Operating Partnership (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Instrument [Line Items]
Summary of Senior Notes, Amounts Issued	Senior Notes Senior Notes and Annual Interest Rate Date Issued Maturity Date Amount Issued (in millions, local currency) Net Proceeds (in millions) (1) Interest Payment Dates Initial Issuer (2) Floating Rate Guaranteed Notes due 2019 (5) May 22, 2017 May 22, 2019 € 125.0 $ 140.1 Quarterly, commencing August 22, 2017 Digital Euro Finco, LLC (3) 5.875% Notes due 2020 Jan 28, 2010 Feb 1, 2020 $ 500.0 487.1 Semi-annually, commencing August 1, 2010 Digital Realty Trust, L.P. 3.400% Notes due 2020 Oct 1, 2015 Oct 1, 2020 $ 500.0 494.5 Semi-annually, commencing April 1, 2016 Digital Delta Holdings, LLC (4) 5.250% Notes due 2021 Mar 8, 2011 Mar 15, 2021 $ 400.0 395.5 Semi-annually, commencing September 15, 2011 Digital Realty Trust, L.P. 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) 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. 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. 3.300% 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 Oct 17, 2030 £ 400.0 516.1 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 3.400% 2020 Notes, the 4.750% 2025 Notes, the related indenture and registration rights agreement by operation of law. (5) The 2019 Notes bear interest at a rate per annum, reset quarterly, equal to three-month EURIBOR plus 0.50% (currently 0.18% ).
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, 2018 and 2017 is as follows (in thousands): Indebtedness Interest Rate at December 31, 2018 Maturity Date Principal Outstanding December 31, 2018 Principal Outstanding December 31, 2017 Global revolving credit facilities Various (1) Jan 24, 2023 (1) $ 1,663,156 (2) $ 558,191 (2) Deferred financing costs, net (15,421 ) (7,245 ) Global revolving credit facilities, net 1,647,735 550,946 Unsecured Term Loans 2019 Term Loan Base Rate + 1.000% Dec 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 508,120 (5) 1,125,117 (5) Deferred financing costs, net (4,216 ) (4,784 ) Unsecured term loans, net 1,178,904 1,420,333 Unsecured senior notes: Senior Notes: Floating rate notes due 2019 EURIBOR + 0.500% May 22, 2019 143,338 (6) 150,063 (6) 5.875% notes due 2020 5.875% Feb 1, 2020 500,000 500,000 3.400% notes due 2020 3.400% Oct 1, 2020 500,000 500,000 5.250% notes due 2021 5.250% Mar 15, 2021 400,000 400,000 3.950% notes due 2022 3.950% Jul 1, 2022 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 382,620 (7) 405,390 (7) 2.625% notes due 2024 2.625% Apr 15, 2024 688,020 (6) 720,300 (6) 2.750% notes due 2024 2.750% Jul 19, 2024 318,850 (7) 337,825 (7) 4.250% notes due 2025 4.250% Jan 17, 2025 510,160 (7) 540,520 (7) 4.750% notes due 2025 4.750% Oct 1, 2025 450,000 450,000 3.700% notes due 2027 3.700% Aug 15, 2027 1,000,000 1,000,000 4.450% notes due 2028 4.450% Jul 15, 2028 650,000 — 3.300% notes due 2029 3.300% Jul 19, 2029 446,390 (7) 472,955 (7) 3.750% notes due 2030 3.750% Oct 17, 2030 510,160 (7) — Unamortized discounts (19,859 ) (18,508 ) Total senior notes, net of discount 7,629,679 6,608,545 Deferred financing costs, net (40,553 ) (37,788 ) Total unsecured senior notes, net of discount and deferred financing costs 7,589,126 6,570,757 Secured debt: 731 East Trade Street 8.22% Jul 1, 2020 1,776 2,370 Secured note due December 2023 Base Rate + 4.250% Dec 20, 2023 104,000 104,000 Secured note due March 2023 LIBOR + 1.100% (4) Mar 1, 2023 600,000 — Unamortized net premiums 148 241 Total secured debt, including premiums 705,924 106,611 Deferred financing costs, net (20,210 ) (29 ) Total secured debt, including premiums and net of deferred financing costs 685,714 106,582 Total indebtedness $ 11,101,479 $ 8,648,618 (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, 2018 and December 31, 2017 are as follows (balances, in thousands): Denomination of Draw Balance as of December 31, 2018 Weighted-average Balance as of December 31, 2017 Weighted-average Global Revolving Credit Facility Floating Rate Borrowing (a) U.S. dollar ($) $ 890,000 3.37 % $ 400,000 2.48 % British pound sterling (£) 8,290 (c) 1.61 % 18,918 (d) 1.50 % Euro (€) 451,800 (c) 0.90 % 31,213 (d) 0.62 % Australian dollar (AUD) 27,632 (c) 2.82 % — — % Hong Kong dollar (HKD) 8,797 (c) 3.14 % 4,100 (d) 2.20 % Japanese yen (JPY) 4,105 (c) 0.90 % 65,890 (d) 0.96 % Singapore dollar (SGD) 77,112 (c) 2.79 % — — % Canadian dollar (CAD) 60,856 (c) 3.16 % 23,070 (d) 2.36 % Total $ 1,528,592 2.57 % $ 543,191 2.15 % Base Rate Borrowing (b) U.S. dollar ($) $ — — % $ 15,000 4.50 % Total borrowings $ 1,528,592 2.57 % $ 558,191 2.21 % Yen Revolving Credit Facility 134,564 (c) 0.50 % — — % Total borrowings $ 1,663,156 2.41 % $ 558,191 2.21 % (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. (b) The interest rates for base rate borrowings under the global revolving credit facility equal the U.S. Prime Rate. (c) Based on exchange rates of $1.28 to £1.00, $1.15 to €1.00 , $0.78 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) Based on exchange rates $1.23 to £1.00, of $1.35 to €1.00 , $0.78 to 1.00 HKD, $0.13 to 1.00 JPY, $0.69 to 1.00 SGD and $0.80 to 1.00 CAD, respectively, as of December 31, 2017 . (3) Interest rates are based on our current senior unsecured debt ratings and is currently 100 basis points over the applicable index for floating rate advances for the 2023 Term Loan and the 2024 Term Loan. (4) We have entered into interest rate swap agreements as a cash flow hedge for interest generated by the U.S. dollar and Canadian dollar borrowings under the global revolving credit facility and unsecured term loan. See Note 15. "Derivative Instruments" for further information. (5) Balances as of December 31, 2018 and December 31, 2017 are as follows (balances, in thousands): Denomination of Draw Balance as of December 31, 2018 Weighted-average Balance as of December 31, 2017 Weighted-average U.S. dollar ($) $ 300,000 3.46 % (b) $ 606,911 2.78 % (d) British pound sterling (£) — — % 229,011 (c) 1.59 % (d) Singapore dollar (SGD) 146,080 (a) 2.76 % 233,788 (c) 2.17 % Australian dollar (AUD) 204,632 (a) 2.94 % 179,841 (c) 2.79 % Hong Kong dollar (HKD) 85,188 (a) 3.32 % 85,762 (c) 2.20 % Canadian dollar (CAD) 72,220 (a) 3.24 % (b) 78,357 (c) 2.44 % (d) Japanese yen (JPY) — — % 11,447 (c) 1.05 % Total $ 808,120 3.17 % (b) $ 1,425,117 2.42 % (d) (a) 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 . (b) 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 15 for further discussion on interest rate swaps. (c) Based on exchange rates of $1.23 to £1.00 , $0.75 to 1.00 SGD, $0.78 to 1.00 AUD, $0.13 to 1.00 HKD, $0.74 to 1.00 CAD and $0.01 to 1.00 JPY, respectively, as of December 31, 2017 . (d) As of December 31, 2017 , the weighted-average interest rate reflecting interest rate swaps was 2.72% (U.S. dollar), 1.89% (British pound sterling), 1.88% (Canadian dollar) and 2.41% (Total). See Note 15 for further discussion on interest rate swaps. (6) Based on exchange rates of $1.15 to €1.00 as of December 31, 2018 and $1.20 to €1.00 as of December 31, 2017 . (7) Based on exchange rates of $1.28 to £1.00 as of December 31, 2018 and $1.35 to £1.00 as of December 31, 2017 .
Schedule of Debt Maturities and Principal Maturities	The table below summarizes our debt maturities and principal payments as of December 31, 2018 (in thousands): Global Revolving Unsecured Senior Notes Secured Debt Total 2019 $ — $ 375,000 $ 143,338 $ 644 $ 518,982 2020 — — 1,000,000 1,132 1,001,132 2021 — — 400,000 120,000 520,000 2022 — — 800,000 150,000 950,000 2023 1,528,592 808,120 732,620 434,000 3,503,332 Thereafter 134,564 — 4,573,580 — 4,708,144 Subtotal $ 1,663,156 $ 1,183,120 $ 7,649,538 $ 705,776 $ 11,201,590 Unamortized discount — — (19,859 ) — (19,859 ) Unamortized premium — — — 148 148 Total $ 1,663,156 $ 1,183,120 $ 7,629,679 $ 705,924 $ 11,181,879 (1) Subject to two six -month extension options exercisable by us. The bank group is obligated to grant the extension options provided we give proper notice, we make certain representations and warranties and no default exists under the global revolving credit facility.

Income per Share (Tables)

Income per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Summary of Basic and Diluted Earnings per Share	The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts): Year Ended December 31, 2018 2017 2016 Net income available to common stockholders $ 249,930 $ 173,148 $ 332,088 Weighted average shares outstanding—basic 206,035,408 174,059,386 149,953,662 Potentially dilutive common shares: Stock options — — 9,726 Unvested incentive units 141,260 141,136 71,031 Forward equity offering 33,315 124,527 3,990 Market performance-based awards 463,488 570,049 641,279 Weighted average shares outstanding—diluted 206,673,471 174,895,098 150,679,688 Income per share: Basic $ 1.21 $ 0.99 $ 2.21 Diluted $ 1.21 $ 0.99 $ 2.20
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, 2018 2017 2016 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 8,227,463 3,996,550 2,406,018 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock 1,876,584 540,773 — Potentially dilutive Series E Cumulative Redeemable Preferred Stock — — 2,880,254 Potentially dilutive Series F Cumulative Redeemable Preferred Stock — 463,301 1,939,905 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 2,326,861 2,261,153 2,652,503 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 3,409,772 3,313,484 3,886,966 Potentially dilutive Series I Cumulative Redeemable Preferred Stock 2,329,584 2,263,799 2,655,607 Potentially dilutive Series J Cumulative Redeemable Preferred Stock 1,858,622 720,803 — 20,028,886 13,559,863 16,421,253

Income per Unit (Tables)

Income per Unit (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 2016 Net income available to common stockholders $ 249,930 $ 173,148 $ 332,088 Weighted average shares outstanding—basic 206,035,408 174,059,386 149,953,662 Potentially dilutive common shares: Stock options — — 9,726 Unvested incentive units 141,260 141,136 71,031 Forward equity offering 33,315 124,527 3,990 Market performance-based awards 463,488 570,049 641,279 Weighted average shares outstanding—diluted 206,673,471 174,895,098 150,679,688 Income per share: Basic $ 1.21 $ 0.99 $ 2.21 Diluted $ 1.21 $ 0.99 $ 2.20
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, 2018 2017 2016 Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc. 8,227,463 3,996,550 2,406,018 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock 1,876,584 540,773 — Potentially dilutive Series E Cumulative Redeemable Preferred Stock — — 2,880,254 Potentially dilutive Series F Cumulative Redeemable Preferred Stock — 463,301 1,939,905 Potentially dilutive Series G Cumulative Redeemable Preferred Stock 2,326,861 2,261,153 2,652,503 Potentially dilutive Series H Cumulative Redeemable Preferred Stock 3,409,772 3,313,484 3,886,966 Potentially dilutive Series I Cumulative Redeemable Preferred Stock 2,329,584 2,263,799 2,655,607 Potentially dilutive Series J Cumulative Redeemable Preferred Stock 1,858,622 720,803 — 20,028,886 13,559,863 16,421,253
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, 2018 2017 2016 Net income available to common unitholders $ 260,110 $ 176,918 $ 337,386 Weighted average units outstanding—basic 214,312,871 178,055,936 152,359,680 Potentially dilutive common units: Stock options — — 9,726 Unvested incentive units 141,260 141,136 71,031 Forward equity offering 33,315 124,527 3,990 Market performance-based awards 463,488 570,049 641,279 Weighted average units outstanding—diluted 214,950,934 178,891,648 153,085,706 Income per unit: Basic $ 1.21 $ 0.99 $ 2.21 Diluted $ 1.21 $ 0.99 $ 2.20
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, 2018 2017 2016 Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units 1,876,584 540,773 — Potentially dilutive Series E Cumulative Redeemable Preferred Units — — 2,880,254 Potentially dilutive Series F Cumulative Redeemable Preferred Units — 463,301 1,939,905 Potentially dilutive Series G Cumulative Redeemable Preferred Units 2,326,861 2,261,153 2,652,503 Potentially dilutive Series H Cumulative Redeemable Preferred Units 3,409,772 3,313,484 3,886,966 Potentially dilutive Series I Cumulative Redeemable Preferred Units 2,329,584 2,263,799 2,655,607 Potentially dilutive Series J Cumulative Redeemable Preferred Units 1,858,622 720,803 — 11,801,423 9,563,313 14,015,235

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Deferred Tax Assets and Liabilities	Deferred income tax assets and liabilities as of December 31, 2018 and 2017 were as follows (in thousands): 2018 2017 Gross deferred income tax assets: Net operating loss carryforwards $ 71,656 $ 77,227 Basis difference - real estate property 8,490 48,983 Basis difference - intangibles 256 506 Other - temporary differences 24,341 40,220 Total gross deferred income tax assets 104,743 166,936 Valuation allowance (51,439 ) (46,302 ) Total deferred income tax assets, net of valuation allowance 53,304 120,634 Gross deferred income tax liabilities: Basis difference - real estate property 164,077 183,283 Basis difference - intangibles 6,855 65,920 Straight-line rent 5,340 1,597 Other - temporary differences 23,584 36,812 Total gross deferred income tax liabilities 199,856 287,612 Net deferred income tax liabilities $ 146,552 $ 166,978

Equity and Accumulated Other _2

Equity and Accumulated Other Comprehensive Loss, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Schedule of Stock by Class	Redeemable Preferred Stock Shares Outstanding as of December 31, Balance (in thousands, net of issuance costs) as of December 31, Preferred Stock (1) Date(s) Issued Initial Date to Redeem (2) Share Cap (3) Total Liquidation Value (in thousands) (4) Annual Dividend Rate (5) 2018 2017 2018 2017 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 365,000 1.84375 14,600,000 14,600,000 353,290 353,290 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 $ 1,266,250 50,650,000 50,650,000 $ 1,249,560 $ 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) and 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	The following table shows the ownership interest in the Operating Partnership as of December 31, 2018 and 2017 : December 31, 2018 December 31, 2017 Number of units Percentage of total Number of units Percentage of total Digital Realty Trust, Inc. 206,425,656 95.1 % 205,470,300 96.0 % Noncontrolling interests consist of: Common units held by third parties 6,297,272 2.9 % 6,899,094 3.2 % Issuance of units in connection with Ascenty Acquisition 2,338,874 1.1 % — — % Incentive units held by employees and directors (see note 14) 1,944,738 0.9 % 1,590,001 0.8 % 217,006,540 100.0 % 213,959,395 100.0 %
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, 2018 , 2017 and 2016 : Common Incentive Total As of December 31, 2015 1,421,314 1,412,012 2,833,326 Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1) (279,500 ) — (279,500 ) Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1) — (150,993 ) (150,993 ) Grant of incentive units to employees and directors — 74,246 74,246 Cancellation of incentive units held by employees and directors — (1,416 ) (1,416 ) 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 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 (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/Distributions	We have declared and paid the following dividends on our common and preferred stock for the years ended December 31, 2018 , 2017 and 2016 (in thousands): Date dividend Dividend payable date Series C Preferred Stock Series E Preferred Stock Series F Preferred Stock Series G Preferred Stock Series H Preferred Stock Series I Preferred Stock Series J Preferred Stock Common February 17, 2016 March 31, 2016 $ — $ 5,031 $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 131,587 (1) May 11, 2016 June 30, 2016 — 5,031 3,023 3,672 6,730 3,969 — 131,607 (1) August 10, 2016 September 30, 2016 — — (2) 3,023 3,672 6,730 3,969 — 131,657 (1) November 9, 2016 December 30, 2016 for Preferred Stock; — — 3,023 3,672 6,730 3,969 — 141,882 (1) $ — $ 10,062 $ 12,092 $ 14,688 $ 26,920 $ 15,876 $ — $ 536,733 March 1, 2017 March 31, 2017 $ — $ — $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 148,358 (3) May 8, 2017 June 30, 2017 — — — (4) 3,672 6,730 3,969 — 150,814 (3) August 7, 2017 September 29, 2017 — — — 3,672 6,730 3,969 — 191,041 (3) November 2, 2017 December 29, 2017 for Preferred Stock; 3,963 (5) — — 3,672 6,730 3,969 4,200 (5) 191,067 (3) $ 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 (6) May 8, 2018 June 29, 2018 3,333 — — 3,672 6,730 3,969 2,625 208,071 (6) August 14, 2018 September 28, 2018 3,333 — — 3,672 6,730 3,969 2,625 208,166 (6) November 12, 2018 December 31, 2018 for Preferred Stock; 3,333 — — 3,672 6,730 3,969 2,625 208,415 (6) $ 13,332 $ — $ — $ 14,688 $ 26,920 $ 15,876 $ 10,500 $ 832,667 Annual rate of dividend per share $ 1.65625 $ 1.75000 $ 1.65625 $ 1.46875 $ 1.84375 $ 1.58750 $ 1.31250 (1) $ 3.520 annual rate of dividend per share. (2) Redeemed on September 15, 2016 for $25.35972 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 $4.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $10.3 million were recorded as a reduction to net income available to common stockholders. (3) $3.720 annual rate of dividend per share. (4) 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. (5) Represents a pro rata dividend from and including the original issue date to and including December 31, 2017. (6) $4.040 annual rate of dividend per share.
Schedule of Accumulated Other Comprehensive Income (Loss)	The accumulated balances for each item within other comprehensive income (loss), net are as follows (in thousands): Foreign Cash flow Foreign currency net investment hedge adjustments Accumulated Balance as of December 31, 2016 $ (175,642 ) $ 4,888 $ 35,149 $ (135,605 ) Net current period change 28,272 5,898 (9,411 ) 24,759 Reclassification to interest expense from interest rate swaps — 2,414 — 2,414 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 )

Capital and Accumulated Other_2

Capital and Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2018
Class of Stock [Line Items]
Schedule of Capital Units	Units Outstanding as of December 31, Balance (in thousands, net of issuance costs) as of December 31, Preferred Units (1) Date(s) Issued Initial Date to Redeem (2) Total Liquidation Value (in thousands) (3) Annual Distribution Rate (4) 2018 2017 2018 2017 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 365,000 1.84375 14,600,000 14,600,000 353,290 353,290 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 $ 1,266,250 50,650,000 50,650,000 $ 1,249,560 $ 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 Dividends/Distributions	We have declared and paid the following dividends on our common and preferred stock for the years ended December 31, 2018 , 2017 and 2016 (in thousands): Date dividend Dividend payable date Series C Preferred Stock Series E Preferred Stock Series F Preferred Stock Series G Preferred Stock Series H Preferred Stock Series I Preferred Stock Series J Preferred Stock Common February 17, 2016 March 31, 2016 $ — $ 5,031 $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 131,587 (1) May 11, 2016 June 30, 2016 — 5,031 3,023 3,672 6,730 3,969 — 131,607 (1) August 10, 2016 September 30, 2016 — — (2) 3,023 3,672 6,730 3,969 — 131,657 (1) November 9, 2016 December 30, 2016 for Preferred Stock; — — 3,023 3,672 6,730 3,969 — 141,882 (1) $ — $ 10,062 $ 12,092 $ 14,688 $ 26,920 $ 15,876 $ — $ 536,733 March 1, 2017 March 31, 2017 $ — $ — $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 148,358 (3) May 8, 2017 June 30, 2017 — — — (4) 3,672 6,730 3,969 — 150,814 (3) August 7, 2017 September 29, 2017 — — — 3,672 6,730 3,969 — 191,041 (3) November 2, 2017 December 29, 2017 for Preferred Stock; 3,963 (5) — — 3,672 6,730 3,969 4,200 (5) 191,067 (3) $ 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 (6) May 8, 2018 June 29, 2018 3,333 — — 3,672 6,730 3,969 2,625 208,071 (6) August 14, 2018 September 28, 2018 3,333 — — 3,672 6,730 3,969 2,625 208,166 (6) November 12, 2018 December 31, 2018 for Preferred Stock; 3,333 — — 3,672 6,730 3,969 2,625 208,415 (6) $ 13,332 $ — $ — $ 14,688 $ 26,920 $ 15,876 $ 10,500 $ 832,667 Annual rate of dividend per share $ 1.65625 $ 1.75000 $ 1.65625 $ 1.46875 $ 1.84375 $ 1.58750 $ 1.31250 (1) $ 3.520 annual rate of dividend per share. (2) Redeemed on September 15, 2016 for $25.35972 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 $4.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $10.3 million were recorded as a reduction to net income available to common stockholders. (3) $3.720 annual rate of dividend per share. (4) 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. (5) Represents a pro rata dividend from and including the original issue date to and including December 31, 2017. (6) $4.040 annual rate of dividend per share.
Schedule of Accumulated Other Comprehensive Income (Loss)	The accumulated balances for each item within other comprehensive income (loss), net are as follows (in thousands): Foreign Cash flow Foreign currency net investment hedge adjustments Accumulated Balance as of December 31, 2016 $ (175,642 ) $ 4,888 $ 35,149 $ (135,605 ) Net current period change 28,272 5,898 (9,411 ) 24,759 Reclassification to interest expense from interest rate swaps — 2,414 — 2,414 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 )
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Schedule of Dividends/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, 2018 , 2017 and 2016 (in thousands): Date distribution Distribution payable date Series C Preferred Units Series E Preferred Units Series F Preferred Units Series G Preferred Units Series H Preferred Units Series I Preferred Units Series J Preferred Units Common Feb 17, 2016 March 31, 2016 $ — $ 5,031 $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 131,587 (1) May 11, 2016 June 30, 2016 — 5,031 3,023 3,672 6,730 3,969 — 131,607 (1) Aug 10, 2016 September 30, 2016 — — (2) 3,023 3,672 6,730 3,969 — 131,657 (1) Nov 9, 2016 December 31, 2016 for — — 3,023 3,672 6,730 3,969 — 144,193 (1) $ — $ 10,062 $ 12,092 $ 14,688 $ 26,920 $ 15,876 $ — $ 539,044 Mar 1, 2017 March 31, 2017 $ — $ — $ 3,023 $ 3,672 $ 6,730 $ 3,969 $ — $ 150,968 (3) May 8, 2017 June 30, 2017 — — — (4) 3,672 6,730 3,969 — 153,176 (3) Aug 7, 2017 September 29, 2017 — — — 3,672 6,730 3,969 — 199,049 (3) Nov 2, 2017 December 29, 2017 for 3,963 (5) — — 3,672 6,730 3,969 4,200 (5) 199,061 (3) $ 3,963 $ — $ 3,023 $ 14,688 $ 26,920 $ 15,876 $ 4,200 $ 702,254 Mar 1, 2018 March 30, 2018 $ 3,333 $ — $ — $ 3,672 $ 6,730 $ 3,969 $ 2,625 $ 216,953 (6) May 8, 2018 June 29, 2018 3,333 — — 3,672 6,730 3,969 2,625 216,789 (6) Aug 14, 2018 September 28, 2018 3,333 — — 3,672 6,730 3,969 2,625 216,825 (6) Nov 12, 2018 December 31, 2018 for 3,333 — — 3,672 6,730 3,969 2,625 216,838 (6) $ 13,332 $ — $ — $ 14,688 $ 26,920 $ 15,876 $ 10,500 $ 867,405 Annual rate of distribution per unit $ 1.65625 $ 1.75000 $ 1.65625 $ 1.46875 $ 1.84375 $ 1.58750 $ 1.31250 (1) $ 3.520 annual rate of distribution per unit. (2) Redeemed on September 15, 2016 for $25.35972 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 $4.1 million in the aggregate. In connection with the redemption, the previously incurred offering costs of approximately $10.3 million were recorded as a reduction to net income available to common unitholders. (3) $3.720 annual rate of distribution per unit. (4) 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. (5) Represents a pro rata distribution from and including the original issue date to and including December 31, 2017. (6) $4.040 annual rate of distribution per unit.
Schedule of Accumulated Other Comprehensive Income (Loss)	The accumulated balances for each item within other comprehensive income (loss) are as follows (in thousands): Foreign Cash flow Foreign currency net investment hedge adjustments Accumulated Balance as of December 31, 2016 $ (180,504 ) $ 4,191 $ 35,694 $ (140,619 ) Net current period change 28,709 6,108 (9,542 ) 25,275 Reclassification to interest expense from interest rate swaps — 2,459 — 2,459 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 )

Incentive Plan (Tables)

Incentive Plan (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments	Below is a summary of our compensation expense for the years ended December 31, 2018 , 2017 and 2016 and our unearned compensation as of December 31, 2018 and December 31, 2017 (in millions): Deferred Compensation Unearned Compensation Expected period to recognize unearned compensation (in years) Expensed Capitalized As of December 31, 2018 As of December 31, 2017 Year Ended December 31, Year Ended December 31, Type of incentive award 2018 2017 2016 2018 2017 2016 Long-term incentive units $ 6.8 $ 3.9 $ 4.5 $ 0.2 $ 1.7 $ 1.8 $ 11.5 $ 6.9 2.9 Market performance-based awards 12.7 9.6 7.9 0.8 2.3 1.9 24.8 24.7 2.5 Restricted stock 6.1 4.5 4.1 4.2 3.3 2.8 23.6 17.5 2.7
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	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, 2018 , 2017 and 2016 : Weighted Average Fair Value at Date of Grant Type of incentive award 2018 2017 2016 Long-term incentive units $ 101.86 $ 109.71 $ 87.18 Market performance-based awards $ 119.29 $ 111.06 $ 82.90 Restricted stock $ 100.33 $ 108.65 $ 83.58
Schedule of Nonvested Performance-based Units Activity	Below is a summary of our long-term incentive unit activity for the year ended December 31, 2018 . Unvested Long-term Incentive Units Units Weighted-Average Unvested, beginning of period 99,295 $ 90.59 Granted 128,986 101.86 Vested (51,820 ) 88.88 Cancelled or expired (15,356 ) 83.93 Unvested, end of period 161,105 $ 100.94
Schedule of Share-based Compensation, Performance Based Awards	In the event that the RMS Relative Market Performance during the Market Performance Period is achieved at the “threshold,” “target” or “high” level as set forth below, the awards will become vested as to the market condition with respect to the percentage of Class D units or RSUs, as applicable, set forth below: Level RMS Relative Market Performance Vesting 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 Share-Based Payment Award Valuation Assumptions	Assumptions used in the valuations are summarized as follows: Award Date Expected Stock Price Volatility Risk-Free Interest Rate January 1, 2016 22% 1.32% February 16, 2016 26% 0.89% 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%
Schedule of Restricted Stock Activity	Below is a summary of our restricted stock activity for the year ended December 31, 2018 . Unvested Restricted Stock Shares Weighted-Average Unvested, beginning of period 259,422 $ 90.54 Granted (1) 168,192 100.33 Vested (96,840 ) 83.63 Cancelled or expired (35,273 ) 97.96 Unvested, end of period 295,501 $ 97.49 (1) All restricted stock awards granted in 2018 are subject only to service conditions.

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives	As of December 31, 2018 and December 31, 2017 , we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (in thousands): Notional Amount Fair Value at Significant Other As of As of Type of Strike Effective Date Expiration As of (4) As of (4) Currently-paying contracts $ 206,000 (1) $ 206,000 (1) Swap 1.611 Jun 15, 2017 Jan 15, 2020 $ 1,976 $ 1,409 54,905 (1) 54,905 (1) Swap 1.605 Jun 6, 2017 Jan 6, 2020 517 374 75,000 (1) 75,000 (1) Swap 1.016 Apr 6, 2016 Jan 6, 2021 2,169 2,260 75,000 (1) 75,000 (1) Swap 1.164 Jan 15, 2016 Jan 15, 2021 1,970 1,947 300,000 (1) 300,000 (1) Swap 1.435 Jan 15, 2016 Jan 15, 2023 11,463 9,978 — 229,012 (2) Swap 0.792 Jan 15, 2016 Jan 15, 2019 — (430 ) 72,220 (3) 78,357 (3) Swap 0.779 Jan 15, 2016 Jan 15, 2021 2,024 3,034 $ 783,125 $ 1,018,274 $ 20,119 $ 18,572 (1) Represents debt which bears interest based on one-month U.S. LIBOR. (2) Represents debt which bears interest based on one-month GBP LIBOR. Translation to U.S. dollars is based on exchange rate of $1.35 to £1.00 as of December 31, 2017 . (3) Represents debt which bears interest based on one-month CDOR. Translation to U.S. dollars is based on exchange rates of $0.73 to 1.00 CAD as of December 31, 2018 and $0.80 to 1.00 CAD as of December 31, 2017 . (4) 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 Instruments (Tabl

Fair Value of Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Estimated Fair Value and Carrying Amounts	As of December 31, 2018 and December 31, 2017 , the aggregate estimated fair value and carrying value of our global revolving credit facility, unsecured term loan, unsecured senior notes and mortgage loans were as follows (in thousands): Categorization As of December 31, 2018 As of December 31, 2017 Estimated Fair Value Carrying Value Estimated Fair Value Carrying Value Global revolving credit facilities (1)(5) Level 2 $ 1,663,156 $ 1,663,156 $ 558,191 $ 558,191 Unsecured term loans (2)(6) Level 2 1,183,121 1,183,121 1,425,117 1,425,117 Unsecured senior notes (3)(4)(7) Level 2 7,684,368 7,629,679 6,976,603 6,608,545 Mortgage loans (3)(8) Level 2 706,086 705,924 106,523 106,611 $ 11,236,731 $ 11,181,880 $ 9,066,434 $ 8,698,464 (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 mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2019 Notes, 5.875% 2020 Notes, 3.400% 2020 Notes, 2021 Notes, 3.950% 2022 Notes, 3.625% 2022 Notes, 4.750% 2023 Notes, 2.750% 2023 Notes, 2.625% 2024 Notes, 2.750% 2024 Notes, 4.750% 2025 Notes, 4.250% 2025 Notes, 2027 Notes, 2028 Notes, 2029 Notes and 2030 Notes are valued based on quoted market prices. (4) The carrying value of the 5.875% 2020 Notes, 3.400% 2020 Notes, 2021 Notes, 3.625% 2022 Notes, 3.950% 2022 Notes, 4.750% 2023 Notes, 2.750% 2023 Notes, 2.625% 2024 Notes, 2.750% 2024 Notes, 4.250% 2025 Notes, 2027 Notes, 2028 Notes, 2029 Notes and 2030 Notes are net of discount of $19.9 million and $18.5 million in the aggregate as of December 31, 2018 and December 31, 2017 , respectively. (5) The estimated fair value and carrying value are exclusive of deferred financing costs of $15.4 million and $7.2 million as of December 31, 2018 and December 31, 2017 , respectively. (6) The estimated fair value and carrying value are exclusive of deferred financing costs of $4.2 million and $4.8 million as of December 31, 2018 and December 31, 2017 , respectively. (7) The estimated fair value and carrying value are exclusive of deferred financing costs of $40.6 million and $38.3 million as of December 31, 2018 and December 31, 2017 , respectively. (8) The estimated fair value and carrying value are exclusive of deferred financing costs of $20.2 million and $0.0 million as of December 31, 2018 and December 31, 2017 , respectively.

Tenant Leases (Tables)

Tenant Leases (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Schedule of Future Minimum Lease Payments to be Received	The future minimum lease payments to be received (excluding operating expense reimbursements) by us as of December 31, 2018 , under non-cancelable operating leases are as follows (in thousands): 2019 $ 2,225,243 2020 1,784,585 2021 1,566,645 2022 1,263,810 2023 1,055,553 Thereafter 3,329,052 Total $ 11,224,888

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments	The minimum commitment under these 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

Quarterly Financial Informati_3

Quarterly Financial Information (Digital Realty Trust, Inc.) (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Summary of Selected Quarterly Financial Data	The tables below reflect selected quarterly information for the years ended December 31, 2018 and 2017 . Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per share amounts). Three Months Ended December 31, 2018 September 30, 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 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 $ 0.15 $ 0.33 $ 0.32 $ 0.42 Diluted net income per share available to $ 0.15 $ 0.33 $ 0.32 $ 0.42 Three Months Ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total operating revenues $ 731,445 $ 609,925 $ 565,989 $ 550,569 Net income 79,658 12,475 79,571 84,563 Net income attributable to Digital Realty Trust, Inc. 73,635 12,435 78,651 83,538 Preferred stock dividends and issuance costs 20,329 16,575 20,814 17,393 Net income (loss) available to common stockholders 53,306 (4,140 ) 57,837 66,145 Basic net income (loss) per share available to $ 0.26 $ (0.02 ) $ 0.36 $ 0.42 Diluted net income (loss) per share available to $ 0.26 $ (0.02 ) $ 0.36 $ 0.41

Quarterly Financial Informati_4

Quarterly Financial Information (Digital Realty Trust, L.P.) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information [Line Items]
Summary of Selected Quarterly Financial Data	The tables below reflect selected quarterly information for the years ended December 31, 2018 and 2017 . Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per share amounts). Three Months Ended December 31, 2018 September 30, 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 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 $ 0.15 $ 0.33 $ 0.32 $ 0.42 Diluted net income per share available to $ 0.15 $ 0.33 $ 0.32 $ 0.42 Three Months Ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total operating revenues $ 731,445 $ 609,925 $ 565,989 $ 550,569 Net income 79,658 12,475 79,571 84,563 Net income attributable to Digital Realty Trust, Inc. 73,635 12,435 78,651 83,538 Preferred stock dividends and issuance costs 20,329 16,575 20,814 17,393 Net income (loss) available to common stockholders 53,306 (4,140 ) 57,837 66,145 Basic net income (loss) per share available to $ 0.26 $ (0.02 ) $ 0.36 $ 0.42 Diluted net income (loss) per share available to $ 0.26 $ (0.02 ) $ 0.36 $ 0.41
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, 2018 and 2017 . Certain amounts have been reclassified to conform to the current year presentation (in thousands, except per unit amounts). Three Months Ended December 31, 2018 September 30, 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 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 $ 0.15 $ 0.33 $ 0.32 $ 0.42 Diluted net income per unit available to common $ 0.15 $ 0.33 $ 0.32 $ 0.42 Three Months Ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Total operating revenues $ 731,445 $ 609,925 $ 565,989 $ 550,569 Net income 79,658 12,475 79,571 84,563 Net income attributable to Digital Realty Trust, L.P. 75,773 12,356 79,458 84,442 Preferred unit distributions and issuance costs associated 20,329 16,575 20,814 17,393 Net income (loss) available to common unitholders 55,444 (4,219 ) 58,644 67,049 Basic net income (loss) per unit available to common unitholders $ 0.26 $ (0.02 ) $ 0.36 $ 0.42 Diluted net income (loss) per unit available to common unitholders $ 0.26 $ (0.02 ) $ 0.36 $ 0.41

Organization and Description _3

Organization and Description of Business (Details) $ in Thousands	Dec. 20, 2018USD ($)	Dec. 31, 2018USD ($)property	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)	Mar. 31, 2019USD ($)
Real Estate Properties [Line Items]
Number of real estate properties		214	205
Cash consideration | $		$ 1,679,830	$ 0	$ 0
Common Interest
Real Estate Properties [Line Items]
Ownership percentage in the Operating Partnership		95.10%	96.00%
Preferred Interest
Real Estate Properties [Line Items]
Ownership percentage in the Operating Partnership		100.00%
Ascenty
Real Estate Properties [Line Items]
Number of real estate properties		16
Number of real estate properties under construction		8
Cash consideration | $	$ 1,800,000
DuPont Fabros Technology
Real Estate Properties [Line Items]
Number of real estate properties		15
Operating
Real Estate Properties [Line Items]
Number of real estate properties		196	180
Held for Sale
Real Estate Properties [Line Items]
Number of real estate properties		0	7
Unconsolidated Joint Ventures
Real Estate Properties [Line Items]
Number of real estate properties		18	18
Ascenty | Scenario, Forecast | Brookefield Infrastructure
Real Estate Properties [Line Items]
Ownership percentage in the Operating Partnership					49.00%
Business combination, equity investment | $					$ 700,000
United States
Real Estate Properties [Line Items]
Number of real estate properties		145	152
United States | DuPont Fabros Technology
Real Estate Properties [Line Items]
Number of real estate properties		14
United States | Operating
Real Estate Properties [Line Items]
Number of real estate properties		131	131
United States | Held for Sale
Real Estate Properties [Line Items]
Number of real estate properties		0	7
United States | Unconsolidated Joint Ventures
Real Estate Properties [Line Items]
Number of real estate properties		14	14
Europe
Real Estate Properties [Line Items]
Number of real estate properties		38	38
Europe | Operating
Real Estate Properties [Line Items]
Number of real estate properties		38	38
Europe | Held for Sale
Real Estate Properties [Line Items]
Number of real estate properties		0	0
Europe | Unconsolidated Joint Ventures
Real Estate Properties [Line Items]
Number of real estate properties		0	0
Latin America
Real Estate Properties [Line Items]
Number of real estate properties		16	0
Latin America | Operating
Real Estate Properties [Line Items]
Number of real estate properties		16	0
Latin America | Held for Sale
Real Estate Properties [Line Items]
Number of real estate properties		0	0
Latin America | Unconsolidated Joint Ventures
Real Estate Properties [Line Items]
Number of real estate properties			0
Asia
Real Estate Properties [Line Items]
Number of real estate properties		7	7
Asia | Operating
Real Estate Properties [Line Items]
Number of real estate properties		3	3
Asia | Held for Sale
Real Estate Properties [Line Items]
Number of real estate properties		0	0
Asia | Unconsolidated Joint Ventures
Real Estate Properties [Line Items]
Number of real estate properties		4	4
Australia
Real Estate Properties [Line Items]
Number of real estate properties		5	5
Australia | Operating
Real Estate Properties [Line Items]
Number of real estate properties		5	5
Australia | Held for Sale
Real Estate Properties [Line Items]
Number of real estate properties		0	0
Australia | Unconsolidated Joint Ventures
Real Estate Properties [Line Items]
Number of real estate properties		0	0
Canada
Real Estate Properties [Line Items]
Number of real estate properties		3	3
Canada | DuPont Fabros Technology
Real Estate Properties [Line Items]
Number of real estate properties		1
Canada | Operating
Real Estate Properties [Line Items]
Number of real estate properties		3	3
Canada | Held for Sale
Real Estate Properties [Line Items]
Number of real estate properties		0	0
Canada | Unconsolidated Joint Ventures
Real Estate Properties [Line Items]
Number of real estate properties		0	0

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details)	3 Months Ended									12 Months Ended
	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2018USD ($)segment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jan. 01, 2019USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of Operating Segments | segment										1
Goodwill [Roll Forward]
Balance as of December 31, 2017				$ 3,389,595,000						$ 3,389,595,000
Merger / Acquisition										982,667,000
Impact of Change in Foreign Exchange Rates										(24,255,000)
Balance as of December 31, 2018	$ 4,348,007,000				$ 3,389,595,000					$ 4,348,007,000	$ 3,389,595,000
Period in which short-term investment become cash equivalents										90 days
Interest capitalized										$ 34,700,000	21,700,000	$ 16,300,000
Compensation costs, leasing and construction activities										74,100,000	77,300,000	70,700,000
Deferred leasing costs, net	322,200,000				330,900,000					322,200,000	330,900,000
Amortization expense on deferred leasing costs	72,900,000				50,100,000				$ 43,800,000	72,900,000	50,100,000	43,800,000
Assets or liabilities for uncertain tax positions	0				0					0	0
Interest or penalties from uncertain tax positions										0	0	0
Non-cash gain on lease termination									29,200,000
Asset retirement obligations	17,500,000				12,500,000					17,500,000	12,500,000
Proceeds from sale of real estate										291,700,000
Gain (loss) on sale										$ 80,400,000	39,900,000
Number of reportable segments | segment										1
Operating revenue	778,267,000	$ 768,924,000	$ 754,919,000	744,368,000	731,445,000	$ 609,925,000	$ 565,989,000	$ 550,569,000		$ 3,046,478,000	2,457,928,000	2,142,213,000
Investments in real estate	15,079,726,000				13,841,186,000					15,079,726,000	13,841,186,000
Interconnection Revenue [Member]
Goodwill [Roll Forward]
Prior period reclassifications											(235,700,000)	(204,300,000)
Rental and Other Services
Goodwill [Roll Forward]
Prior period reclassifications											235,700,000	204,300,000
United States
Goodwill [Roll Forward]
Operating revenue										2,482,100,000	1,942,700,000	1,670,200,000
Investments in real estate	11,100,000,000				10,500,000,000				6,300,000,000	11,100,000,000	10,500,000,000	6,300,000,000
Non-US
Goodwill [Roll Forward]
Operating revenue										564,400,000	515,200,000	442,900,000
Investments in real estate	3,800,000,000				3,100,000,000				2,600,000,000	3,800,000,000	3,100,000,000	2,600,000,000
United Kingdom
Goodwill [Roll Forward]
Operating revenue										295,300,000	275,100,000	234,300,000
Investments in real estate	1,600,000,000				1,700,000,000				$ 1,500,000,000	$ 1,600,000,000	$ 1,700,000,000	$ 1,500,000,000
United Kingdom | Sales | Geographic Concentration Risk
Goodwill [Roll Forward]
Concentration risk										9.70%	11.20%	11.10%
United Kingdom | Long-Lived Assets | Geographic Concentration Risk
Goodwill [Roll Forward]
Concentration risk										10.90%	12.10%	16.60%
ASU 2016-02
Goodwill [Roll Forward]
Percent of revenues										97.00%
Estimated direct costs to be expensed if Topic 842 had been in effect										$ 37,000,000
ASU 2016-02 | Scenario, Forecast | Minimum
Goodwill [Roll Forward]
Lease liability													$ 700,000,000
Right-of-use asset													625,000,000
ASU 2016-02 | Scenario, Forecast | Maximum
Goodwill [Roll Forward]
Lease liability													900,000,000
Right-of-use asset													$ 825,000,000
ASU 2014-09
Goodwill [Roll Forward]
Percent of revenues										3.00%
Buildings and improvements | Minimum
Goodwill [Roll Forward]
Building and improvements, useful life										5 years
Buildings and improvements | Maximum
Goodwill [Roll Forward]
Building and improvements, useful life										39 years
Machinery and equipment | Minimum
Goodwill [Roll Forward]
Building and improvements, useful life										7 years
Machinery and equipment | Maximum
Goodwill [Roll Forward]
Building and improvements, useful life										15 years
Furniture and Fixtures | Minimum
Goodwill [Roll Forward]
Building and improvements, useful life										3 years
Furniture and Fixtures | Maximum
Goodwill [Roll Forward]
Building and improvements, useful life										5 years
Telx Acquisition
Goodwill [Roll Forward]
Balance as of December 31, 2017				330,845,000						$ 330,845,000
Merger / Acquisition										0
Impact of Change in Foreign Exchange Rates										0
Balance as of December 31, 2018	330,845,000				330,845,000					330,845,000	$ 330,845,000
European Portfolio Acquisition
Goodwill [Roll Forward]
Balance as of December 31, 2017				466,604,000						466,604,000
Merger / Acquisition										0
Impact of Change in Foreign Exchange Rates										(24,255,000)
Balance as of December 31, 2018	442,349,000				466,604,000					442,349,000	466,604,000
DFT Merger
Goodwill [Roll Forward]
Balance as of December 31, 2017				2,592,146,000						2,592,146,000
Merger / Acquisition										0
Impact of Change in Foreign Exchange Rates										0
Balance as of December 31, 2018	2,592,146,000				2,592,146,000					2,592,146,000	2,592,146,000
Ascenty Acquisition
Goodwill [Roll Forward]
Balance as of December 31, 2017				$ 0						0
Merger / Acquisition										982,667,000
Impact of Change in Foreign Exchange Rates										0
Balance as of December 31, 2018	$ 982,667,000				$ 0					$ 982,667,000	$ 0

Business Combinations (Ascenty

Business Combinations (Ascenty Acquisition) (Details) - USD ($) $ in Thousands	Dec. 20, 2018	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill		$ 4,348,007	$ 3,389,595
Ascenty Acquisition
Business Acquisition [Line Items]
Total consideration of assets and liabilities acquired	$ 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 Acquisition | Digital Realty Operating Partnership Units
Business Acquisition [Line Items]
Equity interests in exchange for units	254,000
Ascenty Acquisition | Secured Term Loan | Secured Term Loan, 5 Year
Business Acquisition [Line Items]
Proceeds from debt	$ 600,000
Debt term	5 years
Ascenty Acquisition | Secured Term Loan | Unsecured Debt
Business Acquisition [Line Items]
Proceeds from debt	$ 1,000,000
Ascenty Acquisition | Tenant relationship value
Business Acquisition [Line Items]
Intangible assets	375,000
Ascenty Acquisition | Acquired in-place lease value
Business Acquisition [Line Items]
Intangible assets	$ 120,000

Business Combinations (DFT Merg

Business Combinations (DFT Merger) (Details) - USD ($) $ in Thousands	Sep. 14, 2017	Sep. 29, 2017	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Land			$ 356,704	$ 87,610
Goodwill			4,348,007	3,389,595
DFT Merger
Business Acquisition [Line Items]
Land	$ 312,579
Buildings and improvements	3,677,497
Cash and cash equivalents	20,650
Accounts receivables and other assets	10,978
Goodwill	2,592,181		$ 2,592,146	$ 2,592,146
Acquired below-market leases	(185,543)
Accounts payable and other accrued liabilities	(248,259)
Other working capital, net	(22,640)
Total consideration of assets and liabilities acquired	6,209,633
Acquired above-market leases
Business Acquisition [Line Items]
Weighted average remaining intangible amortization life (in months)			2 years 10 months 1 day	65 months
Acquired above-market leases | DFT Merger
Business Acquisition [Line Items]
Acquired above-market leases	$ 162,333
Weighted average remaining intangible amortization life (in months)	47 months
Tenant relationship value | DFT Merger
Business Acquisition [Line Items]
Acquired above-market leases	$ 980,267
Weighted average remaining intangible amortization life (in months)	220 months
Acquired in-place lease value
Business Acquisition [Line Items]
Weighted average remaining intangible amortization life (in months)			6 years 4 months 10 days	81 months
Acquired in-place lease value | DFT Merger
Business Acquisition [Line Items]
Acquired above-market leases	$ 557,128
Weighted average remaining intangible amortization life (in months)	70 months
Tenant origination costs | DFT Merger
Business Acquisition [Line Items]
Acquired above-market leases	$ 44,990
Weighted average remaining intangible amortization life (in months)	80 months
Acquired below-market leases
Business Acquisition [Line Items]
Weighted average remaining intangible amortization life (in months)				80 months
Acquired below-market leases | DFT Merger
Business Acquisition [Line Items]
Weighted average remaining intangible amortization life (in months)	137 months
Global revolving credit facilities | DFT Merger
Business Acquisition [Line Items]
Long term debt	$ (450,697)
Unsecured term loans | DFT Merger
Business Acquisition [Line Items]
Long term debt	(250,000)
Unsecured senior notes | DFT Merger
Business Acquisition [Line Items]
Long term debt	(886,831)
Debt paid off at closing of merger		$ 621,000
Mortgage loans | DFT Merger
Business Acquisition [Line Items]
Long term debt	$ (105,000)

Business Combinations (DFT Me_2

Business Combinations (DFT Merger Pro Forma Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Merger related costs	$ 43,000
Revenue associated with properties acquired	177,800
Net income associated with properties acquired	5,400
Digital Realty Trust, L.P.
Business Acquisition [Line Items]
Net income available to common shareholders	$ 53,786	$ 103,639
Income per share/unit, diluted (in dollars per share)	$ 0.25	$ 0.51
DFT Merger
Business Acquisition [Line Items]
Net income available to common shareholders	$ 51,717	$ 99,653
Income per share/unit, diluted (in dollars per share)	$ 0.25	$ 0.51
Merger related costs	$ 43,000
Adjustment to diluted earnings per share (in shares)	43.2
DFT Merger | Digital Realty Trust, L.P.
Business Acquisition [Line Items]
Total revenue	$ 2,860,454	$ 2,670,914

Investments in Real Estate (Sch

Investments in Real Estate (Schedule of Real Estate Property Acquisitions) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Real Estate Properties [Line Items]
Land	$ 1,509,764	$ 1,136,341
Acquired Ground Lease	10,575	11,150
Building and Improvements	16,745,210	15,215,405
Tenant Improvements	574,336	553,040
Accumulated Depreciation and Amortization	(3,935,267)	(3,238,227)
Net investments in properties	14,904,618	13,677,709
Direct and accrued costs related to work in progress	1,600,000	1,400,000
Internet Gateway Data Centers
Real Estate Properties [Line Items]
Land	101,964	109,844
Acquired Ground Lease	0	0
Building and Improvements	2,137,458	1,940,495
Tenant Improvements	114,013	99,174
Accumulated Depreciation and Amortization	(885,315)	(778,659)
Net investments in properties	1,468,120	1,370,854
Data Centers
Real Estate Properties [Line Items]
Land	1,391,585	1,010,306
Acquired Ground Lease	10,575	11,150
Building and Improvements	14,502,437	13,147,042
Tenant Improvements	460,247	453,712
Accumulated Depreciation and Amortization	(3,016,646)	(2,430,984)
Net investments in properties	13,348,198	12,191,226
Technology Manufacturing
Real Estate Properties [Line Items]
Land	11,959	11,959
Acquired Ground Lease	0	0
Building and Improvements	1,582	1,564
Tenant Improvements	76	76
Accumulated Depreciation and Amortization	(100)	(31)
Net investments in properties	13,517	13,568
Technology Office
Real Estate Properties [Line Items]
Land	2,091	2,067
Acquired Ground Lease	0	0
Building and Improvements	23,104	23,029
Tenant Improvements	0	0
Accumulated Depreciation and Amortization	(18,441)	(16,779)
Net investments in properties	6,754	8,317
Other
Real Estate Properties [Line Items]
Land	2,165	2,165
Acquired Ground Lease	0	0
Building and Improvements	80,629	103,275
Tenant Improvements		78
Accumulated Depreciation and Amortization	(14,765)	(11,774)
Net investments in properties	$ 68,029	$ 93,744

Investments in Real Estate (Hel

Investments in Real Estate (Held for Sale) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)property	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Assets	$ 23,766,695,000	$ 21,404,345,000
Liabilities	12,892,653,000	10,300,993,000
Impairment charges, real estate	$ 0	$ 29,000,000	$ 0
Number of real estate properties | property	214	205
United States
Business Acquisition [Line Items]
Number of real estate properties | property		3
Held-for-sale
Business Acquisition [Line Items]
Number of properties, classified as held for sale | property	8	8
Assets		$ 139,500,000
Liabilities		$ 5,000,000
Number of real estate properties | property		8

Investments in Real Estate (Acq

Investments in Real Estate (Acquisitions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Purchase price	$ 410.7	$ 415.8
Land parcels
Business Acquisition [Line Items]
Purchase price	296.1	55.3
Data Centers
Business Acquisition [Line Items]
Purchase price	$ 114.6	346.2
Technology Manufacturing
Business Acquisition [Line Items]
Purchase price		$ 14.3

Investments in Real Estate (Pur

Investments in Real Estate (Purchase Price Allocation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Land	$ 356,704	$ 87,610
Buildings and Improvements	54,008	276,913
Tenant Improvements	0	1,582
Below-Market Leases	(200,113)	(249,465)
Acquisition Date Fair Value	410,712	415,764
Acquired above-market leases
Business Acquisition [Line Items]
Intangibles	$ 0	$ 21,043
Weighted average remaining intangible amortization life (in months)	2 years 10 months 1 day	65 months
Acquired in-place lease value
Business Acquisition [Line Items]
Intangibles	$ 0	$ 30,111
Weighted average remaining intangible amortization life (in months)	6 years 4 months 10 days	81 months
Acquired below-market leases
Business Acquisition [Line Items]
Below-Market Leases	$ 0	$ (1,495)
Weighted average remaining intangible amortization life (in months)		80 months
Land Parcels
Business Acquisition [Line Items]
Land	296,071	$ 55,229
Buildings and Improvements	0	0
Tenant Improvements	0	0
Acquisition Date Fair Value	296,071	55,229
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	20,431
Buildings and Improvements	54,008	275,374
Tenant Improvements	0	1,506
Acquisition Date Fair Value	114,641	346,199
Data Centers | Acquired above-market leases
Business Acquisition [Line Items]
Intangibles	0	21,043
Data Centers | Acquired in-place lease value
Business Acquisition [Line Items]
Intangibles	0	28,656
Data Centers | Acquired below-market leases
Business Acquisition [Line Items]
Below-Market Leases	$ 0	(811)
Technology Manufacturing
Business Acquisition [Line Items]
Land		11,950
Buildings and Improvements		1,539
Tenant Improvements		76
Acquisition Date Fair Value		14,336
Technology Manufacturing | Acquired above-market leases
Business Acquisition [Line Items]
Intangibles		0
Technology Manufacturing | Acquired in-place lease value
Business Acquisition [Line Items]
Intangibles		1,455
Technology Manufacturing | Acquired below-market leases
Business Acquisition [Line Items]
Below-Market Leases		$ (684)

Investments in Real Estate (Dis

Investments in Real Estate (Dispositions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds	$ 291.7	$ 91.3
Gain (loss) on sale	80.4	39.9
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
8025 North Interstate 35
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds		20.2
Gain (loss) on sale		9.6
44874 Moran Road
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds		34
Gain (loss) on sale		15.6
44874 Moran Road | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale		$ 11.7
44874 Moran Road | Disposed of by Sale | Corporate Joint Venture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percent		75.00%
1 Solutions Parkway
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross Proceeds		$ 37.1
Gain (loss) on sale		$ 14.7

Investments in Unconsolidated_3

Investments in Unconsolidated Joint Ventures (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018propertyjoint_venture	Dec. 31, 2017property	Nov. 07, 2017property	Nov. 01, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Number of real estate properties	214	205
Seattle, Hong Kong, Tokyo, Osaka
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership	50.00%
Number of joint ventures | joint_venture	4
PREI ®
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership	20.00%	20.00%			20.00%
Number of joint ventures	1
Number of real estate properties	10
Prudential Real Estate Investors and Griffin Capital Essential Asset REIT, Inc.
Schedule of Equity Method Investments [Line Items]
Number of joint ventures | joint_venture	2
GCEAR
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership	20.00%	20.00%			20.00%
Number of real estate properties	1
1101 Space Park Drive
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership	17.00%	17.00%			17.00%
Mitsubishi
Schedule of Equity Method Investments [Line Items]
Ownership percentage in the Operating Partnership	50.00%	50.00%		50.00%
Number of real estate properties			2

Investments in Unconsolidated_4

Investments in Unconsolidated Joint Ventures (Summary of Financial Information for Joint Ventures) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 01, 2017
Schedule of Equity Method Investments [Line Items]
Net Investment in Properties	$ 1,070,661	$ 1,061,950	$ 741,228
Total Assets	1,371,431	1,375,006	922,694
Mortgage Loans	728,338	712,690	457,141
Total Liabilities	876,157	869,879	549,997
Equity / (Deficit)	495,274	505,127	372,697
Our investment in and share of equity in earnings of unconsolidated joint ventures	175,108	163,477	106,402
Revenues	214,815	151,965	137,518
Property Operating Expense	(75,826)	(49,230)	(44,126)
Net Operating Income	138,989	102,735	93,392
Net Income (Loss)	47,222	43,944	38,214
Equity in earnings of unconsolidated joint ventures	$ 32,979	$ 25,516	$ 17,104
2001 Sixth Avenue
Schedule of Equity Method Investments [Line Items]
% Ownership	50.00%	50.00%	50.00%
Net Investment in Properties	$ 32,786	$ 26,933	$ 27,342
Total Assets	49,278	50,481	43,258
Mortgage Loans	134,527	134,472	101,394
Total Liabilities	139,569	138,564	106,241
Equity / (Deficit)	(90,291)	(88,083)	(62,983)
Revenues	52,806	49,369	45,518
Property Operating Expense	(17,264)	(16,719)	(15,574)
Net Operating Income	35,542	32,650	29,944
Net Income (Loss)	$ 25,612	$ 20,833	$ 16,374
2020 Fifth Avenue
Schedule of Equity Method Investments [Line Items]
% Ownership	50.00%	50.00%	50.00%
Net Investment in Properties	$ 44,644	$ 45,309	$ 45,973
Total Assets	54,855	54,594	55,005
Mortgage Loans	48,000	47,000	47,000
Total Liabilities	48,333	47,249	47,612
Equity / (Deficit)	6,522	7,345	7,393
Revenues	9,417	9,088	8,788
Property Operating Expense	(2,156)	(1,820)	(1,500)
Net Operating Income	7,261	7,268	7,288
Net Income (Loss)	$ 4,689	$ 4,881	$ 4,821
33 Chun Choi Street (Hong Kong)
Schedule of Equity Method Investments [Line Items]
% Ownership	50.00%	50.00%	50.00%
Net Investment in Properties	$ 151,256	$ 133,435	$ 134,249
Total Assets	201,527	192,071	184,855
Mortgage Loans	0	0	0
Total Liabilities	9,337	5,598	3,291
Equity / (Deficit)	192,190	186,473	181,564
Revenues	21,394	19,235	18,856
Property Operating Expense	(7,164)	(6,504)	(6,636)
Net Operating Income	14,230	12,731	12,220
Net Income (Loss)	$ 6,958	$ 5,467	$ 6,315
Mitsubishi
Schedule of Equity Method Investments [Line Items]
% Ownership	50.00%	50.00%		50.00%
Net Investment in Properties	$ 332,373	$ 325,977
Total Assets	469,159	452,063
Mortgage Loans	228,075	221,851
Total Liabilities	285,424	288,962
Equity / (Deficit)	183,735	163,101
Revenues	59,300	7,927
Property Operating Expense	(26,360)	(4,218)
Net Operating Income	32,940	3,709
Net Income (Loss)	$ 15,884	$ 1,108
PREI ®
Schedule of Equity Method Investments [Line Items]
% Ownership	20.00%	20.00%	20.00%
Net Investment in Properties	$ 375,016	$ 399,967	$ 409,876
Total Assets	433,024	456,912	468,298
Mortgage Loans	210,626	207,687	207,270
Total Liabilities	283,899	285,050	288,325
Equity / (Deficit)	149,125	171,862	179,973
Revenues	42,058	41,464	41,075
Property Operating Expense	(8,457)	(7,978)	(8,503)
Net Operating Income	33,601	33,486	32,572
Net Income (Loss)	$ (4,159)	$ 13,889	$ 13,615
GCEAR
Schedule of Equity Method Investments [Line Items]
% Ownership	20.00%	20.00%	20.00%
Net Investment in Properties	$ 111,909	$ 114,376	$ 116,949
Total Assets	139,268	151,191	162,863
Mortgage Loans	101,885	101,680	101,477
Total Liabilities	104,268	104,220	104,393
Equity / (Deficit)	35,000	46,971	58,470
Revenues	20,457	18,924	19,742
Property Operating Expense	(8,546)	(7,362)	(7,808)
Net Operating Income	11,911	11,562	11,934
Net Income (Loss)	$ (2,177)	$ (1,962)	$ (1,396)
1101 Space Park Drive
Schedule of Equity Method Investments [Line Items]
% Ownership	17.00%	17.00%	17.00%
Net Investment in Properties	$ 22,677	$ 15,953	$ 6,839
Total Assets	24,320	17,694	8,415
Mortgage Loans	5,225	0	0
Total Liabilities	5,327	236	135
Equity / (Deficit)	18,993	17,458	8,280
Revenues	9,383	5,958	3,539
Property Operating Expense	(5,879)	(4,629)	(4,105)
Net Operating Income	3,504	1,329	(566)
Net Income (Loss)	$ 415	$ (272)	$ (1,515)

Acquired Intangible Assets an_3

Acquired Intangible Assets and Liabilities (Summary of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Acquired in-place lease value
Finite-Lived Intangible Assets [Line Items]
Gross amount	$ 1,569,401	$ 1,473,515
Accumulated amortization	(795,033)	(613,948)
Net	774,368	859,567
Tenant relationship value
Finite-Lived Intangible Assets [Line Items]
Gross amount	2,339,606	1,978,277
Accumulated amortization	(291,818)	(169,919)
Net	2,047,788	1,808,358
Acquired above-market leases
Finite-Lived Intangible Assets [Line Items]
Gross amount	277,796	294,514
Accumulated amortization	(158,037)	(110,139)
Net	119,759	184,375
Acquired below-market leases
Finite-Lived Intangible Assets [Line Items]
Gross amount	442,535	469,119
Accumulated amortization	(242,422)	(219,654)
Net	$ 200,113	$ 249,465

Acquired Intangible Assets an_4

Acquired Intangible Assets and Liabilities (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired leases	$ (27,300)	$ (2,200)	$ 8,300
Expected average remaining lives of acquired below market leases	8 years 21 days
Amortization of intangible assets	$ 416,621	$ 247,468	180,608
Acquired above-market leases
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives of acquired above market leases	2 years 10 months 1 day	65 months
Acquired in-place lease value
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives of acquired above market leases	6 years 4 months 10 days	81 months
Amortization of intangible assets	$ 211,000	$ 101,200	52,600
Weighted average remaining contractual life for acquired leases excluding renewals or extensions	5 years 11 months 10 days
Tenant Relationship Value
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 123,500	85,900	67,200
Weighted average remaining contractual life for acquired leases excluding renewals or extensions	14 years 10 months 4 days
Trade Name
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 0	$ 0	6,900
Write-down of intangible assets			$ 6,100

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, 2018USD ($)
Finite-Lived Intangible Assets [Line Items]
2,019	$ (15,323)
2,020	(3,915)
2,021	872
2,022	7,898
2,023	12,045
Thereafter	78,777
Total	$ 80,354

Acquired Intangible Assets an_6

Acquired Intangible Assets and Liabilities (Schedule of Future Amortization Finite Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Acquired in-place lease value
Finite-Lived Intangible Assets [Line Items]
2,019	$ 158,095
2,020	123,450
2,021	98,916
2,022	77,056
2,023	65,518
Thereafter	251,333
Net	774,368	$ 859,567
Tenant relationship value and trade names
Finite-Lived Intangible Assets [Line Items]
2,019	143,818
2,020	143,818
2,021	143,818
2,022	143,818
2,023	143,818
Thereafter	1,328,698
Net	$ 2,047,788

Debt of The Company (Details)

Debt of The Company (Details) - Unsecured senior notes	Dec. 31, 2018
5.875% notes due 2020
Debt Instrument [Line Items]
Interest rate	5.875%
3.400% notes due 2020
Debt Instrument [Line Items]
Interest rate	3.40%
5.250% notes due 2021
Debt Instrument [Line Items]
Interest rate	5.25%
3.950% notes due 2022
Debt Instrument [Line Items]
Interest rate	3.95%
3.625% notes due 2022
Debt Instrument [Line Items]
Interest rate	3.625%
2.750% notes due 2023
Debt Instrument [Line Items]
Interest rate	2.75%
4.750% notes due 2025
Debt Instrument [Line Items]
Interest rate	4.75%
3.700% notes due 2027
Debt Instrument [Line Items]
Interest rate	3.70%
4.450% Notes due 2028
Debt Instrument [Line Items]
Interest rate	4.45%
4.750% notes due 2023
Debt Instrument [Line Items]
Interest rate	4.75%
2.750% notes due 2024
Debt Instrument [Line Items]
Interest rate	2.75%
4.250% notes due 2025
Debt Instrument [Line Items]
Interest rate	4.25%
3.300% notes due 2029
Debt Instrument [Line Items]
Interest rate	3.30%
3.750% Notes due 2030
Debt Instrument [Line Items]
Interest rate	3.75%
2.625% notes due 2024
Debt Instrument [Line Items]
Interest rate	2.625%

Debt of the Operating Partner_3

Debt of the Operating Partnership (Debt Schedule) (Details)	Dec. 20, 2018USD ($)	Dec. 19, 2018extension	Oct. 24, 2018	Dec. 31, 2018USD ($)extension$ / $$ / €$ / ¥$ / £$ / $$ / $$ / $	Dec. 31, 2017USD ($)$ / $$ / €$ / ¥$ / £$ / $$ / $
Global revolving credit facilities
Debt Instrument [Line Items]
Deferred financing costs, net				$ (15,400,000)	$ (7,200,000)
Unsecured term loan
Debt Instrument [Line Items]
Deferred financing costs, net				(4,200,000)	(4,800,000)
Senior notes
Debt Instrument [Line Items]
Deferred financing costs, net				$ (40,600,000)	(38,300,000)
Senior notes | 5.875% notes due 2020
Debt Instrument [Line Items]
Stated interest rate				5.875%
Senior notes | 5.250% notes due 2021
Debt Instrument [Line Items]
Stated interest rate				5.25%
Senior notes | 3.625% notes due 2022
Debt Instrument [Line Items]
Stated interest rate				3.625%
Senior notes | 2.750% notes due 2023
Debt Instrument [Line Items]
Stated interest rate				2.75%
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 | 4.750% notes due 2025
Debt Instrument [Line Items]
Stated interest rate				4.75%
Senior notes | 3.700% notes due 2027
Debt Instrument [Line Items]
Stated interest rate				3.70%
Senior notes | 4.450% Notes due 2028
Debt Instrument [Line Items]
Stated interest rate				4.45%
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				$ 11,201,590,000
Total				11,101,479,000	$ 8,648,618,000
Unamortized discounts				(19,859,000)
Total				11,181,879,000
Unamortized net premiums				$ 148,000
Digital Realty Trust, L.P. | British pound sterling (£)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / £					1.35
Digital Realty Trust, L.P. | Canadian dollar (CAD)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $				0.73	0.80
Digital Realty Trust, L.P. | Unsecured Term Loan, 5 Year
Debt Instrument [Line Items]
Debt instrument term			5 years
Digital Realty Trust, L.P. | Global revolving credit facilities
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,663,156,000	$ 558,191,000
Deferred financing costs, net				(15,421,000)	(7,245,000)
Total				1,647,735,000	$ 550,946,000
Unamortized discounts				0
Total				1,663,156,000
Unamortized net premiums				$ 0
Basis spread on variable rate				0.90%
Commitment fee percentage				0.20%
Number of extension options | extension				2
Revolving credit facility commitments extension				6 months
Digital Realty Trust, L.P. | Global revolving credit facilities | British pound sterling (£)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / £				1.28	1.23
Digital Realty Trust, L.P. | Global revolving credit facilities | Euro (€)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / €				1.15	1.35
Digital Realty Trust, L.P. | Global revolving credit facilities | Australian dollar (AUD) | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate				78.09%
Digital Realty Trust, L.P. | Global revolving credit facilities | Hong Kong dollar (HKD)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $				0.13	0.78
Digital Realty Trust, L.P. | Global revolving credit facilities | Japanese yen (JPY)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / ¥				0.01	0.13
Digital Realty Trust, L.P. | Global revolving credit facilities | Singapore dollar (SGD)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $				0.73	0.69
Digital Realty Trust, L.P. | Global revolving credit facilities | Canadian dollar (CAD)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $				0.73	0.80
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,528,592,000	$ 543,191,000
Basis spread on variable rate				0.90%
Weighted-average interest rate				2.57%	2.15%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate | U.S. dollar ($)
Debt Instrument [Line Items]
Long-term debt, gross				$ 890,000,000	$ 400,000,000
Weighted-average interest rate				3.37%	2.48%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate | British pound sterling (£)
Debt Instrument [Line Items]
Long-term debt, gross				$ 8,290,000	$ 18,918,000
Weighted-average interest rate				1.61%	1.50%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate | Euro (€)
Debt Instrument [Line Items]
Long-term debt, gross				$ 451,800,000	$ 31,213,000
Weighted-average interest rate				0.90%	0.62%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate | Australian dollar (AUD)
Debt Instrument [Line Items]
Long-term debt, gross				$ 27,632,000	$ 0
Weighted-average interest rate				2.82%	0.00%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate | Hong Kong dollar (HKD)
Debt Instrument [Line Items]
Long-term debt, gross				$ 8,797,000	$ 4,100,000
Weighted-average interest rate				3.14%	2.20%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate | Japanese yen (JPY)
Debt Instrument [Line Items]
Long-term debt, gross				$ 4,105,000	$ 65,890,000
Weighted-average interest rate				0.90%	0.96%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate | Singapore dollar (SGD)
Debt Instrument [Line Items]
Long-term debt, gross				$ 77,112,000	$ 0
Weighted-average interest rate				2.79%	0.00%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating Rate | Canadian dollar (CAD)
Debt Instrument [Line Items]
Long-term debt, gross				$ 60,856,000	$ 23,070,000
Weighted-average interest rate				3.16%	2.36%
Digital Realty Trust, L.P. | Global revolving credit facilities | Base Rate | U.S. dollar ($)
Debt Instrument [Line Items]
Long-term debt, gross				$ 0	$ 15,000,000
Weighted-average interest rate				0.00%	4.50%
Digital Realty Trust, L.P. | Global revolving credit facilities | Floating and Base Rate
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,528,592,000	$ 558,191,000
Weighted-average interest rate				2.57%	2.21%
Digital Realty Trust, L.P. | Unsecured term loan
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,183,120,000
Deferred financing costs, net				(4,216,000)	$ (4,784,000)
Total				1,178,904,000	$ 1,420,333,000
Unamortized discounts				0
Total				1,183,120,000
Unamortized net premiums				$ 0
Digital Realty Trust, L.P. | Unsecured term loan | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate				2.66%	2.41%
Digital Realty Trust, L.P. | Unsecured term loan | U.S. dollar ($) | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate				2.44%	2.72%
Digital Realty Trust, L.P. | Unsecured term loan | British pound sterling (£)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / £					1.23
Digital Realty Trust, L.P. | Unsecured term loan | British pound sterling (£) | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate					1.89%
Digital Realty Trust, L.P. | Unsecured term loan | Euro (€)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / €				1.15	1.20
Digital Realty Trust, L.P. | Unsecured term loan | Australian dollar (AUD)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $				0.70
Digital Realty Trust, L.P. | Unsecured term loan | Hong Kong dollar (HKD)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $					0.13
Digital Realty Trust, L.P. | Unsecured term loan | Japanese yen (JPY)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / ¥					0.01
Digital Realty Trust, L.P. | Unsecured term loan | Singapore dollar (SGD)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $					0.75
Digital Realty Trust, L.P. | Unsecured term loan | Canadian dollar (CAD)
Debt Instrument [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $					0.74
Digital Realty Trust, L.P. | Unsecured term loan | Canadian dollar (CAD) | Interest Rate Swap
Debt Instrument [Line Items]
Weighted-average interest rate				1.78%	1.88%
Digital Realty Trust, L.P. | Unsecured term loan | 2019 Term Loan
Debt Instrument [Line Items]
Long-term debt, gross				$ 375,000,000	$ 0
Debt instrument term			1 year
Interest rate at period end		3.47%
Number of extension options | extension		1
Digital Realty Trust, L.P. | Unsecured term loan | 2019 Term Loan | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 Term Loan
Debt Instrument [Line Items]
Long-term debt, gross				$ 300,000,000	300,000,000
Digital Realty Trust, L.P. | Unsecured term loan | 2024 Term Loan
Debt Instrument [Line Items]
Long-term debt, gross				$ 508,120,000	1,125,117,000
Digital Realty Trust, L.P. | Unsecured term loan | Unsecured Term Loan, 5 Year
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 and 2024 Term Loan
Debt Instrument [Line Items]
Long-term debt, gross				$ 808,120,000	$ 1,425,117,000
Weighted-average interest rate				3.17%	2.42%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 and 2024 Term Loan | U.S. dollar ($)
Debt Instrument [Line Items]
Long-term debt, gross				$ 300,000,000	$ 606,911,000
Weighted-average interest rate				3.46%	2.78%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 and 2024 Term Loan | British pound sterling (£)
Debt Instrument [Line Items]
Long-term debt, gross				$ 0	$ 229,011,000
Weighted-average interest rate				0.00%	1.59%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 and 2024 Term Loan | Australian dollar (AUD)
Debt Instrument [Line Items]
Long-term debt, gross				$ 204,632,000	$ 179,841,000
Weighted-average interest rate				2.94%	2.79%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 and 2024 Term Loan | Hong Kong dollar (HKD)
Debt Instrument [Line Items]
Long-term debt, gross				$ 85,188,000	$ 85,762,000
Weighted-average interest rate				3.32%	2.20%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 and 2024 Term Loan | Japanese yen (JPY)
Debt Instrument [Line Items]
Long-term debt, gross				$ 0	$ 11,447,000
Weighted-average interest rate				0.00%	1.05%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 and 2024 Term Loan | Singapore dollar (SGD)
Debt Instrument [Line Items]
Long-term debt, gross				$ 146,080,000	$ 233,788,000
Weighted-average interest rate				2.76%	2.17%
Digital Realty Trust, L.P. | Unsecured term loan | 2023 and 2024 Term Loan | Canadian dollar (CAD)
Debt Instrument [Line Items]
Long-term debt, gross				$ 72,220,000	$ 78,357,000
Weighted-average interest rate				3.24%	2.44%
Digital Realty Trust, L.P. | Senior notes
Debt Instrument [Line Items]
Long-term debt, gross				$ 7,649,538,000
Deferred financing costs, net				(40,553,000)	$ (37,788,000)
Total				7,589,126,000	6,570,757,000
Unamortized discounts				(19,859,000)	(18,508,000)
Total				7,629,679,000	6,608,545,000
Unamortized net premiums				0
Digital Realty Trust, L.P. | Senior notes | Floating rate notes due 2019
Debt Instrument [Line Items]
Long-term debt, gross				$ 143,338,000	150,063,000
Weighted-average interest rate				0.18%
Digital Realty Trust, L.P. | Senior notes | Floating rate notes due 2019 | EURIBOR
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Digital Realty Trust, L.P. | Senior notes | 5.875% notes due 2020
Debt Instrument [Line Items]
Long-term debt, gross				$ 500,000,000	500,000,000
Stated interest rate				5.875%
Digital Realty Trust, L.P. | Senior notes | 3.400% notes due 2020
Debt Instrument [Line Items]
Long-term debt, gross				$ 500,000,000	500,000,000
Stated interest rate				3.40%
Digital Realty Trust, L.P. | Senior notes | 5.250% notes due 2021
Debt Instrument [Line Items]
Long-term debt, gross				$ 400,000,000	400,000,000
Stated interest rate				5.25%
Digital Realty Trust, L.P. | Senior notes | 3.950% notes due 2022
Debt Instrument [Line Items]
Long-term debt, gross				$ 500,000,000	500,000,000
Stated interest rate				3.95%
Digital Realty Trust, L.P. | Senior notes | 3.625% notes due 2022
Debt Instrument [Line Items]
Long-term debt, gross				$ 300,000,000	300,000,000
Stated interest rate				3.625%
Digital Realty Trust, L.P. | Senior notes | 2.750% notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross				$ 350,000,000	350,000,000
Stated interest rate				2.75%
Digital Realty Trust, L.P. | Senior notes | 4.750% notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross				$ 382,620,000	405,390,000
Stated interest rate				4.75%
Digital Realty Trust, L.P. | Senior notes | 2.625% notes due 2024
Debt Instrument [Line Items]
Long-term debt, gross				$ 688,020,000	720,300,000
Stated interest rate				2.625%
Digital Realty Trust, L.P. | Senior notes | 2.750% notes due 2024
Debt Instrument [Line Items]
Long-term debt, gross				$ 318,850,000	337,825,000
Stated interest rate				2.75%
Digital Realty Trust, L.P. | Senior notes | 4.250% notes due 2025
Debt Instrument [Line Items]
Long-term debt, gross				$ 510,160,000	540,520,000
Stated interest rate				4.25%
Digital Realty Trust, L.P. | Senior notes | 4.750% notes due 2025
Debt Instrument [Line Items]
Long-term debt, gross				$ 450,000,000	450,000,000
Stated interest rate				4.75%
Digital Realty Trust, L.P. | Senior notes | 3.700% notes due 2027
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,000,000,000	1,000,000,000
Stated interest rate				3.70%
Digital Realty Trust, L.P. | Senior notes | 4.450% Notes due 2028
Debt Instrument [Line Items]
Long-term debt, gross				$ 650,000,000	0
Stated interest rate				4.45%
Digital Realty Trust, L.P. | Senior notes | 3.300% notes due 2029
Debt Instrument [Line Items]
Long-term debt, gross				$ 446,390,000	472,955,000
Stated interest rate				3.30%
Digital Realty Trust, L.P. | Senior notes | 3.750% Notes due 2030
Debt Instrument [Line Items]
Long-term debt, gross				$ 510,160,000	0
Stated interest rate				3.75%
Digital Realty Trust, L.P. | Senior notes | Secured note due December 2023 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				4.25%
Digital Realty Trust, L.P. | Senior notes | Secured note due March 2023 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate				1.10%
Digital Realty Trust, L.P. | Secured debt
Debt Instrument [Line Items]
Long-term debt, gross				$ 705,776,000
Deferred financing costs, net				(20,210,000)	(29,000)
Total				685,714,000	106,582,000
Unamortized discounts				0
Total				705,924,000	106,611,000
Unamortized net premiums				148,000	241,000
Digital Realty Trust, L.P. | Secured debt | 731 East Trade Street
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,776,000	2,370,000
Interest rate at period end				8.22%
Digital Realty Trust, L.P. | Secured debt | Secured note due December 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 600,000,000			$ 104,000,000	104,000,000
Debt instrument term	5 years
Interest rate at period end				7.04%
Basis spread on variable rate	4.25%
Digital Realty Trust, L.P. | Secured debt | Secured note due March 2023
Debt Instrument [Line Items]
Long-term debt, gross				$ 600,000,000	0
Digital Realty Trust, L.P. | Yen Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross				$ 134,564,000	$ 0
Basis spread on variable rate				0.50%
Commitment fee percentage				0.10%
Weighted-average interest rate				0.50%	0.00%
Digital Realty Trust, L.P. | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross				$ 1,663,156,000	$ 558,191,000
Weighted-average interest rate				2.41%	2.21%

Debt of the Operating Partner_4

Debt of the Operating Partnership (Global Revolving Credit Facilities) (Narrative) (Details) - Digital Realty Trust, L.P.	12 Months Ended
	Dec. 31, 2018USD ($)extension	Oct. 24, 2018USD ($)	Oct. 24, 2018JPY (¥)	Jan. 15, 2016USD ($)
Global revolving credit facilities
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 2,350,000,000		$ 2,000,000,000
Number of extension options | extension	2
Debt extension	6 months
Basis spread on variable rate	0.90%
Commitment fee percentage	0.20%
Letters of credit	$ 44,500,000
Global revolving credit facilities | Accordian Feature
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,250,000,000
Yen Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		296,500,000	¥ 33,300,000,000
Basis spread on variable rate	0.50%
Commitment fee percentage	0.10%
Yen Revolving Credit Facility | Accordian Feature
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 831,100,000	¥ 93,300,000,000

Debt of the Operating Partner_5

Debt of the Operating Partnership (Unsecured Term Loans) (Narrative) (Details) - Digital Realty Trust, L.P.	Oct. 24, 2018USD ($)	Dec. 31, 2018USD ($)extension	Jan. 15, 2016USD ($)
Debt Instrument [Line Items]
Long-term debt, gross		$ 11,201,590,000
2023 Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 300,000,000
Debt instrument term	5 years
2024 Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 512,000,000
Debt instrument term	5 years
Unsecured term loan
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,550,000,000
Number of extension options | extension		2
Debt extension		6 months
Maximum borrowing capacity, subject to receipt of lender commitments and other conditions		$ 1,250,000,000
Basis spread on variable rate		1.00%
Long-term debt, gross		$ 800,000,000

Debt of the Operating Partner_6

Debt of the Operating Partnership (Senior Notes) (Details) - Digital Realty Trust, L.P. - Senior notes	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2018GBP (£)	Dec. 31, 2018EUR (€)
Floating rate notes due 2019
Debt of the Operating Partnership [Line Items]
Debt face amount | €			€ 125,000,000
Proceeds form debt, net of issuance costs	$ 140,100,000
Weighted-average interest rate	0.18%	0.18%	0.18%
5.875% notes due 2020
Debt of the Operating Partnership [Line Items]
Debt face amount	$ 500,000,000
Proceeds form debt, net of issuance costs	487,100,000
3.400% notes Due 2020
Debt of the Operating Partnership [Line Items]
Debt face amount	500,000,000
Proceeds form debt, net of issuance costs	494,500,000
5.250% notes due 2021
Debt of the Operating Partnership [Line Items]
Debt face amount	400,000,000
Proceeds form debt, net of issuance costs	395,500,000
3.950% notes Due 2022
Debt of the Operating Partnership [Line Items]
Debt face amount	500,000,000
Proceeds form debt, net of issuance costs	491,800,000
3.625% notes due 2022
Debt of the Operating Partnership [Line Items]
Debt face amount	300,000,000
Proceeds form debt, net of issuance costs	293,100,000
2.750% notes due 2023
Debt of the Operating Partnership [Line Items]
Debt face amount	350,000,000
Proceeds form debt, net of issuance costs	346,900,000
4.750% notes due 2023
Debt of the Operating Partnership [Line Items]
Debt face amount | £		£ 300,000,000
Proceeds form debt, net of issuance costs	490,900,000
2.625% notes due 2024
Debt of the Operating Partnership [Line Items]
Debt face amount | €			€ 600,000,000
Proceeds form debt, net of issuance costs	670,300,000
2.750% notes due 2024
Debt of the Operating Partnership [Line Items]
Debt face amount | £		250,000,000
Proceeds form debt, net of issuance costs	321,300,000
4.250% notes due 2025
Debt of the Operating Partnership [Line Items]
Debt face amount | £		400,000,000
Proceeds form debt, net of issuance costs	624,200,000
4.750% notes due 2025
Debt of the Operating Partnership [Line Items]
Debt face amount	450,000,000
Proceeds form debt, net of issuance costs	445,800,000
3.700% notes due 2027
Debt of the Operating Partnership [Line Items]
Debt face amount	1,000,000,000
Proceeds form debt, net of issuance costs	991,000,000
4.450% Notes due 2028
Debt of the Operating Partnership [Line Items]
Debt face amount	650,000,000
Proceeds form debt, net of issuance costs	643,300,000
3.300% notes due 2029
Debt of the Operating Partnership [Line Items]
Debt face amount | £		350,000,000
Proceeds form debt, net of issuance costs	448,600,000
3.750% Notes due 2030
Debt of the Operating Partnership [Line Items]
Debt face amount | £		£ 400,000,000
Proceeds form debt, net of issuance costs	$ 516,100,000

Debt of the Operating Partner_7

Debt of the Operating Partnership (Senior Notes) (Narrative) (Details) - Digital Realty Trust, L.P. - 5.875% notes due 2020 - Unsecured senior notes	12 Months Ended
	Dec. 31, 2018
Debt of the Operating Partnership [Line Items]
Leverage ratio	60.00%
Secured debt leverage ratio, maximum	40.00%
Interest coverage ratio	1.50
Total unencumbered assets	150.00%

Debt of the Operating Partner_8

Debt of the Operating Partnership (Ascenty Acquisition Financing) (Details)	Dec. 20, 2018USD ($)	Dec. 19, 2018extension	Oct. 24, 2018	Dec. 31, 2018USD ($)extension	Dec. 31, 2017USD ($)	Jan. 15, 2016USD ($)
Debt Instrument [Line Items]
Non-recourse debt	$ 775,000,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	50,000,000
Digital Realty Trust, L.P.
Debt Instrument [Line Items]
Long-term debt, gross				$ 11,201,590,000
Digital Realty Trust, L.P. | Secured debt
Debt Instrument [Line Items]
Long-term debt, gross				705,776,000
Digital Realty Trust, L.P. | Unsecured term loan
Debt Instrument [Line Items]
Long-term debt, gross				1,183,120,000
Digital Realty Trust, L.P. | 2019 Term Loan | Unsecured term loan
Debt Instrument [Line Items]
Long-term debt, gross				375,000,000	$ 0
Debt instrument term			1 year
Number of extension options | extension		1
Debt extension		6 months
Interest rate at period end		3.47%
Digital Realty Trust, L.P. | Secured note due December 2023 | Secured debt
Debt Instrument [Line Items]
Long-term debt, gross	$ 600,000,000			$ 104,000,000	$ 104,000,000
Debt instrument term	5 years
Basis spread on variable rate	4.25%
Interest rate at period end				7.04%
Digital Realty Trust, L.P. | Unsecured term loan
Debt Instrument [Line Items]
Long-term debt, gross				$ 800,000,000
Number of extension options | extension				2
Debt extension				6 months
Basis spread on variable rate				1.00%
Maximum borrowing capacity						$ 1,550,000,000
Digital Realty Trust, L.P. | Delayed Draw Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 125,000,000

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, 2018USD ($)extension	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
2,019	$ 518,982
2,020	1,001,132
2,021	520,000
2,022	950,000
2,023	3,503,332
Thereafter	4,708,144
Subtotal	11,201,590
Unamortized discount	(19,859)
Unamortized premium	148
Total	11,181,879
Global revolving credit facilities
Debt Instrument [Line Items]
2,019	0
2,020	0
2,021	0
2,022	0
2,023	1,528,592
Thereafter	134,564
Subtotal	1,663,156	$ 558,191
Unamortized discount	0
Unamortized premium	0
Total	$ 1,663,156
Number of extension options | extension	2
Revolving credit facility commitments extension	6 months
Unsecured term loan
Debt Instrument [Line Items]
2,019	$ 375,000
2,020	0
2,021	0
2,022	0
2,023	808,120
Thereafter	0
Subtotal	1,183,120
Unamortized discount	0
Unamortized premium	0
Total	1,183,120
Senior notes
Debt Instrument [Line Items]
2,019	143,338
2,020	1,000,000
2,021	400,000
2,022	800,000
2,023	732,620
Thereafter	4,573,580
Subtotal	7,649,538
Unamortized discount	(19,859)	(18,508)
Unamortized premium	0
Total	7,629,679	6,608,545
Secured Debt
Debt Instrument [Line Items]
2,019	644
2,020	1,132
2,021	120,000
2,022	150,000
2,023	434,000
Thereafter	0
Subtotal	705,776
Unamortized discount	0
Unamortized premium	148	241
Total	$ 705,924	$ 106,611

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 31,230	$ 67,268	$ 65,134	$ 86,298	$ 53,306	$ (4,140)	$ 57,837	$ 66,145	$ 249,930	$ 173,148	$ 332,088
Weighted average units outstanding—basic (in shares)									206,035,408	174,059,386	149,953,662
Potentially dilutive common shares:
Stock options (in shares)									0	0	9,726
Unvested incentive units (in shares)									141,260	141,136	71,031
Forward equity offering (in shares)									33,315	124,527	3,990
Market performance-based awards (in shares)									463,488	570,049	641,279
Weighted average units outstanding—diluted (in shares)									206,673,471	174,895,098	150,679,688
Income per share:
Basic (in dollars per share)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.42	$ 1.21	$ 0.99	$ 2.21
Diluted (in dollars per share)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.41	$ 1.21	$ 0.99	$ 2.20

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	20,028,886	13,559,863	16,421,253
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 (in shares)	8,227,463	3,996,550	2,406,018
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	1,876,584	540,773	0
Potentially dilutive Series E Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	0	0	2,880,254
Potentially dilutive Series F Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	0	463,301	1,939,905
Potentially dilutive Series G Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	2,326,861	2,261,153	2,652,503
Potentially dilutive Series H Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	3,409,772	3,313,484	3,886,966
Potentially dilutive Series I Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	2,329,584	2,263,799	2,655,607
Potentially dilutive Series J Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	1,858,622	720,803	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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Net income available to common unitholders	$ 31,230	$ 67,268	$ 65,134	$ 86,298	$ 53,306	$ (4,140)	$ 57,837	$ 66,145	$ 249,930	$ 173,148	$ 332,088
Weighted average units outstanding—basic (in shares)									206,035,408	174,059,386	149,953,662
Potentially dilutive common units:
Stock options (in shares)									0	0	9,726
Unvested incentive units (in shares)									141,260	141,136	71,031
Forward equity offering (in units)									33,315	124,527	3,990
Weighted average units outstanding—diluted (in shares)									206,673,471	174,895,098	150,679,688
Income per unit:
Basic (in dollars per share)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.42	$ 1.21	$ 0.99	$ 2.21
Diluted (in dollars per share)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.41	$ 1.21	$ 0.99	$ 2.20
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Net income available to common unitholders	$ 32,530	$ 69,968	$ 67,834	$ 89,778	$ 55,444	$ (4,219)	$ 58,644	$ 67,049	$ 260,110	$ 176,918	$ 337,386
Weighted average units outstanding—basic (in shares)									214,312,871	178,055,936	152,359,680
Potentially dilutive common units:
Stock options (in shares)									0	0	9,726
Unvested incentive units (in shares)									141,260	141,136	71,031
Forward equity offering (in units)									33,315	124,527	3,990
Market performance-based awards (in shares)									463,488	570,049	641,279
Weighted average units outstanding—diluted (in shares)									214,950,934	178,891,648	153,085,706
Income per unit:
Basic (in dollars per share)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.42	$ 1.21	$ 0.99	$ 2.21
Diluted (in dollars per share)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.41	$ 1.21	$ 0.99	$ 2.20

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	20,028,886	13,559,863	16,421,253
Potentially dilutive Series E Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	0	0	2,880,254
Digital Realty Trust, L.P.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	11,801,423	9,563,313	14,015,235
Digital Realty Trust, L.P. | Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	1,876,584	540,773	0
Digital Realty Trust, L.P. | Potentially dilutive Series E Cumulative Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	0	0	2,880,254
Digital Realty Trust, L.P. | Potentially dilutive Series F Cumulative Redeemable Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	0	463,301	1,939,905
Digital Realty Trust, L.P. | Potentially dilutive Series G Cumulative Redeemable Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	2,326,861	2,261,153	2,652,503
Digital Realty Trust, L.P. | Potentially dilutive Series H Cumulative Redeemable Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	3,409,772	3,313,484	3,886,966
Digital Realty Trust, L.P. | Potentially dilutive Series I Cumulative Redeemable Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities (in shares)	2,329,584	2,263,799	2,655,607
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 (in shares)	1,858,622	720,803	0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Percentage of taxable income distributed to the partnership (at least)	100.00%
Net deferred tax liability	$ 146,552	$ 166,978
Gross deferred income tax assets:
Net operating loss carryforwards	71,656	77,227
Basis difference - real estate property	8,490	48,983
Basis difference - intangibles	256	506
Other - temporary differences	24,341	40,220
Total gross deferred income tax assets	104,743	166,936
Valuation allowance	(51,439)	(46,302)
Total deferred income tax assets, net of valuation allowance	53,304	120,634
Gross deferred income tax liabilities:
Basis difference - real estate property	164,077	183,283
Basis difference - intangibles	6,855	65,920
Straight-line rent	5,340	1,597
Other - temporary differences	23,584	36,812
Total gross deferred income tax liabilities	199,856	287,612
Net deferred income tax liabilities	$ 146,552	$ 166,978

Equity and Accumulated Other _3

Equity and Accumulated Other Comprehensive Loss, Net (Equity Distribution Agreements Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions	66 Months Ended
	Dec. 31, 2016	Jan. 04, 2019	Dec. 31, 2018	Jun. 29, 2011
2011 Equity Distribution Agreements
Class of Stock [Line Items]
Aggregate offering price of the distribution agreement maximum				$ 400,000,000
Net proceeds from sale of common stock	$ 342,700,000
Issuance of common shares (in shares)	5.7
Equity distribution agreements at an average price per share (in dollars per share)	$ 60.35
Payment of commissions to sales agents	$ 3,500,000
Aggregate offering price remaining available for offer and sale			$ 53,800,000
2019 Equity Distribution Agreements | Subsequent Event
Class of Stock [Line Items]
Aggregate offering price of the distribution agreement maximum		$ 1,000,000,000

Equity and Accumulated Other _4

Equity and Accumulated Other Comprehensive Loss, Net (Forward Equity Sale) (Details) - USD ($) $ in Millions	Sep. 27, 2019	Sep. 27, 2018	May 19, 2017	Sep. 27, 2016	Jun. 02, 2016	May 20, 2016
Forward Sale Agreement
Class of Stock [Line Items]
Common stock subject to forward sale agreements (in shares)			2,375,000
Forward Sale Agreement | Digital Realty Trust, L.P.
Class of Stock [Line Items]
Number of shares issued (in shares)		9,775,000		12,000,000	14,375,000	12,500,000
Proceeds from sale of stock			$ 211.1	$ 1,100
Forward Sale Agreement | Digital Realty Trust, L.P. | Scenario, Forecast
Class of Stock [Line Items]
Proceeds from sale of stock	$ 1,100
Over-Allotment Option | Digital Realty Trust, L.P.
Class of Stock [Line Items]
Number of shares issued (in shares)		1,275,000			1,875,000

Equity and Accumulated Other _5

Equity and Accumulated Other Comprehensive Loss, Net (Redeemable Preferred Stock) (Details) $ / shares in Units, $ in Thousands	Sep. 14, 2017$ / sharesshares	Aug. 07, 2017$ / sharesshares	Aug. 24, 2015$ / sharesshares	Mar. 26, 2014$ / sharesshares	Apr. 09, 2013$ / sharesshares	Dec. 31, 2018USD ($)quarter$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Apr. 05, 2017$ / shares
Class of Stock [Line Items]
Liquidation preference						$ 1,266,250	$ 1,266,250
Shares outstanding (in shares) | shares						50,650,000	50,650,000
Balance (net of issuance costs) as of December 31						$ 1,249,560	$ 1,249,560
Number of quarters with no dividends triggering voting rights | quarter						6
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares						$ 25	$ 25
Series C Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares	0.6389035
Liquidation preference						$ 201,250
Annual rate of dividend per share (in dollars per share) | $ / shares	$ 1.65625					$ 1.65625
Shares outstanding (in shares) | shares						8,050,000	8,050,000
Balance (net of issuance costs) as of December 31						$ 219,250	$ 219,250
Preferred stock dividend rate	6.625%
Series G Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares					0.7532
Liquidation preference						$ 250,000
Annual rate of dividend per share (in dollars per share) | $ / shares					$ 1.46875	$ 1.46875
Shares outstanding (in shares) | shares						10,000,000	10,000,000
Balance (net of issuance costs) as of December 31						$ 241,468	$ 241,468
Preferred stock dividend rate					5.875%
Series H Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares				0.9632
Liquidation preference						$ 365,000
Annual rate of dividend per share (in dollars per share) | $ / shares				$ 1.84375		$ 1.84375
Shares outstanding (in shares) | shares						14,600,000	14,600,000
Balance (net of issuance costs) as of December 31						$ 353,290	$ 353,290
Preferred stock dividend rate				7.375%
Series I Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares			0.76231
Liquidation preference						$ 250,000
Annual rate of dividend per share (in dollars per share) | $ / shares			$ 1.58750			$ 1.5875
Shares outstanding (in shares) | shares						10,000,000	10,000,000
Balance (net of issuance costs) as of December 31						$ 242,012	$ 242,012
Preferred stock dividend rate			6.35%
Series J Preferred Stock
Class of Stock [Line Items]
Share cap (in shares) | shares		0.42521
Liquidation preference						$ 200,000
Annual rate of dividend per share (in dollars per share) | $ / shares		$ 1.31250				$ 1.3125
Shares outstanding (in shares) | shares						8,000,000	8,000,000
Balance (net of issuance costs) as of December 31						$ 193,540	$ 193,540
Preferred stock dividend rate		5.25%
Series F Preferred Stock
Class of Stock [Line Items]
Annual rate of dividend per share (in dollars per share) | $ / shares						$ 1.65625
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares								$ 25

Equity and Accumulated Other _6

Equity and Accumulated Other Comprehensive Loss, Net (Noncontrolling Interests in Operating Partnership) (Details) $ in Millions	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)shares
Class of Stock [Line Items]
Partners' capital account units (in units)	206,425,656	205,470,300
Percentage of total	95.10%	96.00%
Common stock conversion ratio	1
Common units held by third parties
Class of Stock [Line Items]
Common units held by third parties (in units)	6,297,272	6,899,094
Percentage of total	2.90%	3.20%
Incentive units held by employees and directors (see note 14)
Class of Stock [Line Items]
Incentive units held by employees and directors (in units)	1,944,738	1,590,001
Percentage of total	0.90%	0.80%
Noncontrolling Interests in Operating Partnership
Class of Stock [Line Items]
Partners' capital account units (in units)	217,006,540	213,959,395
Percentage of total	99.97967%	100.00%
Ascenty Acquisition
Class of Stock [Line Items]
Issuance of units in connection with Ascenty Acquisition	2,338,874	0
Percentage of total	1.10%	0.00%
Digital Realty Trust, L.P.
Class of Stock [Line Items]
Common stock conversion ratio	1
Redemption value | $	$ 1,076.9	$ 887

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling Interest, Shares [Roll Forward]
Balance at beginning of period (in shares)	8,489,095	2,475,663	2,833,326
Common units issued in connection with the DFT merger (in shares)	2,338,874	6,111,770
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (in shares)	(601,822)	(354,490)	(279,500)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (in shares)	(110,070)	(208,092)	(150,993)
Cancellation of incentive units held by employees and directors (in shares)	(22,135)		(1,416)
Incentive units issued upon achievement of market performance condition (in shares)	357,956	390,795
Grant of incentive units to employees and directors (in shares)	128,986	73,449	74,246
Balance at end of period (in shares)	10,580,884	8,489,095	2,475,663
Common Units
Noncontrolling Interest, Shares [Roll Forward]
Balance at beginning of period (in shares)	6,899,094	1,141,814	1,421,314
Common units issued in connection with the DFT merger (in shares)	2,338,874	6,111,770
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (in shares)	(601,822)	(354,490)	(279,500)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (in shares)	0	0	0
Cancellation of incentive units held by employees and directors (in shares)	0		0
Incentive units issued upon achievement of market performance condition (in shares)	0	0
Grant of incentive units to employees and directors (in shares)	0	0	0
Balance at end of period (in shares)	8,636,146	6,899,094	1,141,814
Incentive Units
Noncontrolling Interest, Shares [Roll Forward]
Balance at beginning of period (in shares)	1,590,001	1,333,849	1,412,012
Common units issued in connection with the DFT merger (in shares)	0	0
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (in shares)	0	0	0
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (in shares)	(110,070)	(208,092)	(150,993)
Cancellation of incentive units held by employees and directors (in shares)	(22,135)		(1,416)
Incentive units issued upon achievement of market performance condition (in shares)	357,956	390,795
Grant of incentive units to employees and directors (in shares)	128,986	73,449	74,246
Balance at end of period (in shares)	1,944,738	1,590,001	1,333,849

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. 05, 2017	Sep. 15, 2016	Aug. 24, 2015	Mar. 26, 2014	Apr. 09, 2013	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Dividends Payable [Line Items]
Preferred stock, liquidation preference per share/unit (in dollars per share)								$ 25	$ 25
Series C Preferred Stock
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per share)	$ 1.65625							1.65625
Series E Preferred Stock
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per share)								1.75
Preferred stock, redemption price per share (in dollars per share)				$ 25.35972
Preferred stock, liquidation preference per share/unit (in dollars per share)				$ 25
Accrued and unpaid dividends up to but not including the redemption date				$ 4,100
Redemption premium				$ 10,300
Series F Preferred Stock
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per share)								1.65625
Preferred stock, redemption price per share (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 Stock
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per share)							$ 1.46875	1.46875
Series H Preferred Stock
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per share)						$ 1.84375		1.84375
Series I Preferred Stock
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per share)					$ 1.58750			1.5875
Series J Preferred Stock
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per share)		$ 1.31250						1.3125
Common Stock
Dividends Payable [Line Items]
Common stock dividend per share amount (in dollars per share)								$ 4.040	$ 3.720	$ 3.520
Digital Realty Trust, L.P. | Series C Preferred Stock
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 13,332	$ 3,963	$ 0
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,963
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,333
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,333
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,333
Digital Realty Trust, L.P. | Series C Preferred Stock | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,333
Digital Realty Trust, L.P. | Series E Preferred Stock
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0	0	10,062
Preferred stock, redemption price per share (in dollars per share)				$ 25.35972
Preferred stock, liquidation preference per share/unit (in dollars per share)				$ 25
Accrued and unpaid dividends up to but not including the redemption date				$ 4,100
Redemption premium				$ 10,300
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										5,031
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										5,031
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Digital Realty Trust, L.P. | Series E Preferred Stock | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Digital Realty Trust, L.P. | Series F Preferred Stock
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0	3,023	12,092
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,023
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,023
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,023
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,023
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,023
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Digital Realty Trust, L.P. | Series F Preferred Stock | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Digital Realty Trust, L.P. | Series G Preferred Stock
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								14,688	14,688	14,688
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Digital Realty Trust, L.P. | Series G Preferred Stock | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Digital Realty Trust, L.P. | Series H Preferred Stock
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								26,920	26,920	26,920
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								6,730
Digital Realty Trust, L.P. | Series H Preferred Stock | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								6,730
Digital Realty Trust, L.P. | Series I Preferred Stock
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								15,876	15,876	15,876
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,969
Digital Realty Trust, L.P. | Series I Preferred Stock | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,969
Digital Realty Trust, L.P. | Series J Preferred Stock
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								10,500	4,200	0
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									4,200
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								2,625
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								2,625
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								2,625
Digital Realty Trust, L.P. | Series J Preferred Stock | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								2,625
Digital Realty Trust, L.P. | Common Stock
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								832,667	681,280	536,733
Digital Realty Trust, L.P. | Common Stock | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units										131,587
Digital Realty Trust, L.P. | Common Stock | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units										131,607
Digital Realty Trust, L.P. | Common Stock | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units										131,657
Digital Realty Trust, L.P. | Common Stock | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units										$ 141,882
Digital Realty Trust, L.P. | Common Stock | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units									148,358
Digital Realty Trust, L.P. | Common Stock | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units									150,814
Digital Realty Trust, L.P. | Common Stock | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units									191,041
Digital Realty Trust, L.P. | Common Stock | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units									$ 191,067
Digital Realty Trust, L.P. | Common Stock | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								208,015
Digital Realty Trust, L.P. | Common Stock | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								208,071
Digital Realty Trust, L.P. | Common Stock | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								208,166
Digital Realty Trust, L.P. | Common Stock | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								$ 208,415

Equity and Accumulated Other _9

Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Accumulated Other Comprehensive Income (Loss), Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ 11,049,450	$ 5,132,297
Balance at end of period	10,858,210	11,049,450
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(147,370)	(175,642)
Net current period change	(11,279)	28,272
Reclassification to interest expense from interest rate swaps	0	0
Balance at end of period	(158,649)	(147,370)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	13,200	4,888
Net current period change	7,890	5,898
Reclassification to interest expense from interest rate swaps	(3,826)	2,414
Balance at end of period	17,264	13,200
Foreign currency net investment hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	25,738	35,149
Net current period change	0	(9,411)
Reclassification to interest expense from interest rate swaps	0	0
Balance at end of period	25,738	25,738
Accumulated Other Comprehensive Income (Loss), net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(108,432)	(135,605)
Net current period change	(3,389)	24,759
Reclassification to interest expense from interest rate swaps	(3,826)	2,414
Balance at end of period	$ (115,647)	$ (108,432)

Capital and Accumulated Other_3

Capital and Accumulated Other Comprehensive Income (Loss) (Forward Equity Sale Narrative) (Details) - Digital Realty Trust, L.P. - USD ($) $ in Millions	Sep. 27, 2019	Sep. 27, 2018	May 19, 2017	Sep. 27, 2016	Jun. 02, 2016	May 20, 2016
Forward Sale Agreement
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)		9,775,000		12,000,000	14,375,000	12,500,000
Proceeds from sale of stock			$ 211.1	$ 1,100
Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)		1,275,000			1,875,000
Scenario, Forecast | Forward Sale Agreement
Subsidiary, Sale of Stock [Line Items]
Proceeds from sale of stock	$ 1,100

Capital and Accumulated Other_4

Capital and Accumulated Other Comprehensive Income (Loss) (Redeemable Preferred Units) (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 14, 2017	Aug. 07, 2017	Aug. 24, 2015	Mar. 26, 2014	Apr. 09, 2013	Dec. 31, 2018	Dec. 31, 2017
Preferred Units [Line Items]
Liquidation preference						$ 1,266,250	$ 1,266,250
Units outstanding (in units)						50,650,000	50,650,000
Balance (in thousands, net of issuance costs) as of December 31,						$ 1,249,560	$ 1,249,560
Preferred stock, liquidation preference per share/unit (in dollars per unit)						$ 25	$ 25
Series C Preferred Units
Preferred Units [Line Items]
Liquidation preference						$ 201,250
Annual rate of dividend per share (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
Preferred stock dividend rate	6.625%
Series G Preferred Units
Preferred Units [Line Items]
Liquidation preference						$ 250,000
Annual rate of dividend per share (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
Preferred stock dividend rate					5.875%
Series H Preferred Units
Preferred Units [Line Items]
Liquidation preference						$ 365,000
Annual rate of dividend per share (in dollars per share)				$ 1.84375
Units outstanding (in units)						14,600,000	14,600,000
Balance (in thousands, net of issuance costs) as of December 31,						$ 353,290	$ 353,290
Preferred stock dividend rate				7.375%
Series I Preferred Units
Preferred Units [Line Items]
Liquidation preference						$ 250,000
Annual rate of dividend per share (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
Preferred stock dividend rate			6.35%
Series J Preferred Units
Preferred Units [Line Items]
Liquidation preference						$ 200,000
Annual rate of dividend per share (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
Preferred stock dividend rate		5.25%

Capital and Accumulated Other_5

Capital and Accumulated Other Comprehensive Income (Loss) (Partnership Units Narrative) (Details) $ in Millions	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
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
Redemption value of LP units	$ 1,076.9	$ 887

Capital and Accumulated Other_6

Capital and Accumulated Other Comprehensive Income (Loss) (Schedule of Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 14, 2017	Aug. 07, 2017	Apr. 05, 2017	Sep. 15, 2016	Aug. 24, 2015	Mar. 26, 2014	Apr. 09, 2013	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Dividends Payable [Line Items]
Preferred stock, liquidation preference per share/unit (in dollars per unit)								$ 25	$ 25
Series C Preferred Units
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per unit)	$ 1.65625
Series C Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 13,332	$ 3,963	$ 0
Annual rate of dividend per share (in dollars per unit)								$ 1.65625
Series C Preferred Units | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series C Preferred Units | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series C Preferred Units | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series C Preferred Units | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series C Preferred Units | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series C Preferred Units | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series C Preferred Units | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series C Preferred Units | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,963
Series C Preferred Units | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 3,333
Series C Preferred Units | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,333
Series C Preferred Units | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,333
Series C Preferred Units | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,333
Series E Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 0	0	10,062
Annual rate of dividend per share (in dollars per unit)								$ 1.75
Series E Preferred Units | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										5,031
Series E Preferred Units | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										5,031
Series E Preferred Units | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series E Preferred Units | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series E Preferred Units | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series E Preferred Units | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series E Preferred Units | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series E Preferred Units | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series E Preferred Units | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 0
Series E Preferred Units | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series E Preferred Units | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series E Preferred Units | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series F Preferred Units
Dividends Payable [Line Items]
Preferred stock, redemption price per share (in dollars per unit)			$ 25.01840
Preferred stock, liquidation preference per share/unit (in dollars per unit)			$ 25
Accrued and unpaid dividends up to but not including the redemption date			$ 100
Redemption premium			$ 6,300
Series F Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 0	3,023	12,092
Annual rate of dividend per share (in dollars per unit)								$ 1.65625
Series F Preferred Units | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,023
Series F Preferred Units | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,023
Series F Preferred Units | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,023
Series F Preferred Units | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,023
Series F Preferred Units | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,023
Series F Preferred Units | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series F Preferred Units | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series F Preferred Units | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series F Preferred Units | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 0
Series F Preferred Units | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series F Preferred Units | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series F Preferred Units | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series G Preferred Units
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per unit)							$ 1.46875
Series G Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 14,688	14,688	14,688
Annual rate of dividend per share (in dollars per unit)								$ 1.46875
Series G Preferred Units | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,672
Series G Preferred Units | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,672
Series G Preferred Units | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,672
Series G Preferred Units | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,672
Series G Preferred Units | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,672
Series G Preferred Units | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,672
Series G Preferred Units | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,672
Series G Preferred Units | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,672
Series G Preferred Units | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 3,672
Series G Preferred Units | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Series G Preferred Units | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Series G Preferred Units | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Series H Preferred Units
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per unit)						$ 1.84375
Series H Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 26,920	26,920	26,920
Annual rate of dividend per share (in dollars per unit)								$ 1.84375
Series H Preferred Units | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										6,730
Series H Preferred Units | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										6,730
Series H Preferred Units | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										6,730
Series H Preferred Units | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										6,730
Series H Preferred Units | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									6,730
Series H Preferred Units | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									6,730
Series H Preferred Units | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									6,730
Series H Preferred Units | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									6,730
Series H Preferred Units | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 6,730
Series H Preferred Units | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								6,730
Series H Preferred Units | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								6,730
Series H Preferred Units | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								6,730
Series I Preferred Units
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per unit)					$ 1.58750
Series I Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 15,876	15,876	15,876
Annual rate of dividend per share (in dollars per unit)								$ 1.5875
Series I Preferred Units | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,969
Series I Preferred Units | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,969
Series I Preferred Units | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,969
Series I Preferred Units | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										3,969
Series I Preferred Units | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,969
Series I Preferred Units | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,969
Series I Preferred Units | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,969
Series I Preferred Units | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									3,969
Series I Preferred Units | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 3,969
Series I Preferred Units | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,969
Series I Preferred Units | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,969
Series I Preferred Units | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,969
Series J Preferred Units
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per unit)		$ 1.31250
Series J Preferred Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 10,500	4,200	0
Annual rate of dividend per share (in dollars per unit)								$ 1.3125
Series J Preferred Units | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series J Preferred Units | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series J Preferred Units | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series J Preferred Units | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series J Preferred Units | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series J Preferred Units | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series J Preferred Units | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series J Preferred Units | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									4,200
Series J Preferred Units | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 2,625
Series J Preferred Units | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								2,625
Series J Preferred Units | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								2,625
Series J Preferred Units | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 2,625
Series E Preferred Stock
Dividends Payable [Line Items]
Annual rate of dividend per share (in dollars per unit)								$ 1.75
Preferred stock, redemption price per share (in dollars per unit)				$ 25.35972
Preferred stock, liquidation preference per share/unit (in dollars per unit)				$ 25
Accrued and unpaid dividends up to but not including the redemption date				$ 4,100
Redemption premium				$ 10,300
Series E Preferred Stock | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								$ 0	0	10,062
Preferred stock, redemption price per share (in dollars per unit)				$ 25.35972
Preferred stock, liquidation preference per share/unit (in dollars per unit)				$ 25
Accrued and unpaid dividends up to but not including the redemption date				$ 4,100
Redemption premium				$ 10,300
Series E Preferred Stock | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										5,031
Series E Preferred Stock | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										5,031
Series E Preferred Stock | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series E Preferred Stock | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units										0
Series E Preferred Stock | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series E Preferred Stock | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series E Preferred Stock | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series E Preferred Stock | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units									0
Series E Preferred Stock | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series E Preferred Stock | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series E Preferred Stock | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series E Preferred Stock | Installment 4 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Common Units | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								$ 867,405	$ 702,254	$ 539,044
Common stock dividend per share amount (in dollars per share)								$ 4.040	$ 3.720	$ 3.520
Common Units | Installment 1 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units										$ 131,587
Common Units | Installment 2 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units										131,607
Common Units | Installment 3 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units										131,657
Common Units | Installment 4 Year One | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units										$ 144,193
Common Units | Installment 1 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units									$ 150,968
Common Units | Installment 2 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units									153,176
Common Units | Installment 3 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units									199,049
Common Units | Installment 4 Year Two | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units									$ 199,061
Common Units | Installment 1 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								$ 216,953
Common Units | Installment 2 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								216,789
Common Units | Installment 3 Year Three | Digital Realty Trust, L.P.
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								216,825
Common Units | Installment 4 Year Three | Digital Realty Trust, L.P.
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, 2018	Dec. 31, 2017
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Net current period change	$ (11,279)	$ 28,272
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	7,890	5,898
Reclassification to interest expense from interest rate swaps	(3,826)	2,414
Accumulated Other Comprehensive Income (Loss), net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Net current period change	(3,389)	24,759
Reclassification to interest expense from interest rate swaps	(3,826)	2,414
Digital Realty Trust, L.P.
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	11,049,450	5,132,297
Balance at end of period	10,858,210	11,049,450
Digital Realty Trust, L.P. | Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(151,795)	(180,504)
Net current period change	(11,736)	28,709
Reclassification to interest expense from interest rate swaps	0	0
Balance at end of period	(163,531)	(151,795)
Digital Realty Trust, L.P. | Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	12,758	4,191
Net current period change	8,197	6,108
Reclassification to interest expense from interest rate swaps	(3,969)	2,459
Balance at end of period	16,986	12,758
Digital Realty Trust, L.P. | Foreign currency net investment hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	26,152	35,694
Net current period change	0	(9,542)
Reclassification to interest expense from interest rate swaps	0	0
Balance at end of period	26,152	26,152
Digital Realty Trust, L.P. | Accumulated Other Comprehensive Income (Loss), net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(112,885)	(140,619)
Net current period change	(3,539)	25,275
Reclassification to interest expense from interest rate swaps	(3,969)	2,459
Balance at end of period	$ (120,393)	$ (112,885)

Incentive Plan (Narrative) (Det

Incentive Plan (Narrative) (Details) shares in Millions	Sep. 22, 2017shares	Dec. 31, 2018shares
2004 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares registered, issuable pursuant to 2014 Plan (in 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 the Incentive Plan (in shares)		7.1
Conversion of units to shares ratio		1

Incentive Plan Incentive Plan (

Incentive Plan Incentive Plan (Schedule of Deferred and Unearned Compensation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Long-term incentive units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Expected period to recognize unearned compensation	$ 6.8	$ 3.9	$ 4.5
Deferred compensation, capitalized	0.2	1.7	1.8
Unearned compensation	$ 11.5	6.9
Deferred compensation, expensed	2 years 10 months 20 days
Market performance-based awards
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Expected period to recognize unearned compensation	$ 12.7	9.6	7.9
Deferred compensation, capitalized	0.8	2.3	1.9
Unearned compensation	$ 24.8	24.7
Deferred compensation, expensed	2 years 6 months 1 day
Restricted stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Expected period to recognize unearned compensation	$ 6.1	4.5	4.1
Deferred compensation, capitalized	4.2	3.3	$ 2.8
Unearned compensation	$ 23.6	$ 17.5
Deferred compensation, expensed	2 years 8 months 20 days

Incentive Plan (Long-Term Incen

Incentive Plan (Long-Term Incentive Units) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shares
Granted (in shares)	128,986	73,449	74,246
Long-term incentive units
Shares
Unvested, beginning of period (in shares)	99,295
Granted (in shares)	128,986
Vested (in shares)	(51,820)
Cancelled or expired (in shares)	(15,356)
Unvested, end of period (in shares)	161,105	99,295
Weighted-Average Grant Date Fair Value Per Share
Unvested, beginning of period (in dollars per share)	$ 90.59
Granted (in dollars per share)	101.86	$ 109.71	$ 87.18
Vested (in dollars per share)	88.88
Cancelled (in dollars per share)	83.93
Unvested, end of period (in dollars per share)	$ 100.94	$ 90.59
Minimum | Long-term incentive units
Weighted-Average Grant Date Fair Value Per Share
Award vesting period	2 years
Maximum | Long-term incentive units
Weighted-Average Grant Date Fair Value Per Share
Award vesting period	4 years

Incentive Plan (Weighted Averag

Incentive Plan (Weighted Average Fair Value of Incentive Award) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Long-term incentive units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars per share)	$ 101.86	$ 109.71	$ 87.18
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars per share)	100.33	108.65	83.58
Market performance-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars per share)	$ 119.29	$ 111.06	$ 82.90

Incentive Plan (Market Performa

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

Mar. 09, 2018

Mar. 01, 2018

Feb. 27, 2018

Jan. 01, 2018

Feb. 28, 2017

Feb. 27, 2017

Jan. 01, 2017

Feb. 16, 2016

Jan. 01, 2016

Jan. 31, 2018shares

Jan. 31, 2017shares

Dec. 31, 2018USD ($)simulationshares

Dec. 31, 2017USD ($)shares

Dec. 31, 2016USD ($)shares

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

Units granted (in shares)

128,986

73,449

74,246

Market performance-based awards

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

Performance period

3 years

Number of trials run | simulation

100,000

Expected volatility rate

22.00%

22.00%

22.00%

23.00%

25.00%

26.00%

22.00%

Risk free interest rate

2.42%

2.34%

1.98%

1.43%

1.49%

0.89%

1.32%

Fair value of awards | $

$ 21.8

$ 19.5

$ 21.2

Expected service period

4 years

Market performance-based awards | 2014 Performance Grant

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

Performance period

3 years

Vesting percentage

50.00%

Market performance-based awards | 2014 Performance Grant | Tranche Five

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

Vesting percentage

50.00%

Market performance-based awards | 2015 Performance Grant

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

Performance period

3 years

Vesting percentage

50.00%

Market performance-based awards | 2015 Performance Grant | Below Threshold Level (less than)

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

Vesting percentage

0.00%

0.00%

Performance threshold

(3.00%)

Market performance-based awards | 2015 Performance Grant | Threshold Level

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

Vesting percentage

25.00%

25.00%

Performance threshold

(3.00%)

Market performance-based awards | 2015 Performance Grant | Target Level

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

Vesting percentage

50.00%

50.00%

Performance threshold

1.00%

Market performance-based awards | 2015 Performance Grant | High Level (greater than)

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

Vesting percentage

100.00%

100.00%

Performance threshold

5.00%

Market performance-based awards | 2015 Performance Grant | Tranche Five

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

Vesting percentage

50.00%

Market performance-based awards | 2016 Performance Grant

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

Vesting percentage

50.00%

Market performance-based awards | 2016 Performance Grant | Below Threshold Level (less than)

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

Vesting percentage

0.00%

Performance threshold

(3.00%)

Market performance-based awards | 2016 Performance Grant | Threshold Level

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

Vesting percentage

25.00%

Performance threshold

(3.00%)

Market performance-based awards | 2016 Performance Grant | Target Level

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

Vesting percentage

50.00%

Performance threshold

1.00%

Market performance-based awards | 2016 Performance Grant | High Level (greater than)

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

Vesting percentage

100.00%

Performance threshold

5.00%

Market performance-based awards | 2016 Performance Grant | Tranche Five

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

Vesting percentage

50.00%

Market performance-based awards | 2017 Performance Grant | Tranche Five

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

Vesting percentage

50.00%

Market performance-based awards | 2018 Performance Grant | Tranche Five

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]

Shares vested (in shares)

363,193

399,250

339,317

Units granted (in shares)

2,165,692

Distribution Equivalent Unit

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

Shares vested (in shares)

36,246

44,702

31,009

Restricted Stock Units (RSUs)

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

Shares vested (in shares)

49,707

138,567

56,778

Units granted (in shares)

590,569

Incentive Plan (Restricted Stoc

Incentive Plan (Restricted Stock Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shares
Granted (in shares)	128,986	73,449	74,246
Market performance-based awards
Weighted-Average Grant Date Fair Value Per Share
Granted (in dollars per share)	$ 119.29	$ 111.06	$ 82.90
Additional Information:
Fair value of awards	$ 21.8	$ 19.5	$ 21.2
Restricted stock
Shares
Unvested, beginning of period (in shares)	259,422
Granted (in shares)	168,192
Vested (in shares)	(96,840)
Cancelled or expired (in shares)	(35,273)
Unvested, end of period (in shares)	295,501	259,422
Weighted-Average Grant Date Fair Value Per Share
Unvested, beginning of period (in dollars per share)	$ 90.54
Granted (in dollars per share)	100.33	$ 108.65	$ 83.58
Vested (in dollars per share)	83.63
Cancelled or expired (in dollars per share)	97.96
Unvested, end of period (in dollars per share)	$ 97.49	$ 90.54
Additional Information:
Award vesting period	4 years

Incentive Plan (401(k)) (Narrat

Incentive Plan (401(k)) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Vesting percentage of discretionary contributions	100.00%
Aggregate cost of contributions to the 401(k) Plan	$ 4.8	$ 4.6	$ 3.6

Derivative Instruments (Details

Derivative Instruments (Details) £ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)$ / $	Dec. 31, 2017USD ($)instrument$ / £$ / $	Dec. 31, 2016USD ($)	Dec. 31, 2017GBP (£)instrument$ / £$ / $	Jul. 01, 2016instrument	Jun. 30, 2016USD ($)
Derivative [Line Items]
Ineffective portion of cash flow hedges	$ 0	$ 0	$ 0
Notional Amount	783,125,000	1,018,274,000
Gain (loss) to be reclassified within twelve months	7,800,000
Excess proceeds from forward contract settlement	0	63,956,000	0
Digital Realty Trust, L.P.
Derivative [Line Items]
Excess proceeds from forward contract settlement	$ 0	$ 63,956,000	$ 0
Digital Realty Trust, L.P. | British pound sterling (£)
Derivative [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / £		1.35		1.35
Digital Realty Trust, L.P. | Canadian dollar (CAD)
Derivative [Line Items]
Derivative forward exchange rate (in dollars per share) | $ / $	0.73	0.80		0.80
Level 2
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)	$ 20,119,000	$ 18,572,000
Interest Rate Swap, 1.611
Derivative [Line Items]
Notional Amount	$ 206,000,000	206,000,000
Strike Rate	1.611%
Interest Rate Swap, 1.611 | Level 2
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)	$ 1,976,000	1,409,000
Interest Rate Swap,1.605
Derivative [Line Items]
Notional Amount	$ 54,905,000	54,905,000
Strike Rate	1.605%
Interest Rate Swap,1.605 | Level 2
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)	$ 517,000	374,000
Interest Rate Swap, 1.016
Derivative [Line Items]
Notional Amount	$ 75,000,000	75,000,000
Strike Rate	1.016%
Interest Rate Swap, 1.016 | Level 2
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)	$ 2,169,000	2,260,000
Interest Rate Swap, 1.164
Derivative [Line Items]
Notional Amount	$ 75,000,000	75,000,000
Strike Rate	1.164%
Interest Rate Swap, 1.164 | Level 2
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)	$ 1,970,000	1,947,000
Interest Rate Swap, 1.435
Derivative [Line Items]
Notional Amount	$ 300,000,000	300,000,000
Strike Rate	1.435%
Interest Rate Swap, 1.435 | Level 2
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)	$ 11,463,000	9,978,000
Interest Rate Swap, 0.792
Derivative [Line Items]
Notional Amount	$ 0	229,012,000
Strike Rate	0.792%
Interest Rate Swap, 0.792 | Level 2
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)	$ 0	(430,000)
Interest Rate Swap, 0.779
Derivative [Line Items]
Notional Amount	$ 72,220,000	78,357,000
Strike Rate	0.779%
Interest Rate Swap, 0.779 | Level 2
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)	$ 2,024,000	$ 3,034,000
Currency forward contracts | Not Designated as Hedging Instrument
Derivative [Line Items]
Fair Value at Significant Other Observable Inputs (Level 2)						$ 37,800,000
Currency forward contracts | Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount | £				£ 357.3
Number of forward contracts | instrument		4		4	4
Excess proceeds from forward contract settlement	64,000,000
Amount of AOCI to remain in AOCI	$ 26,200,000

Fair Value of Instruments (Esti

Fair Value of Instruments (Estimated Fair Value and Carrying Amounts) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long-term debt	$ 11,236,731	$ 9,066,434
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long-term debt	11,181,880	8,698,464
Global revolving credit facilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs	15,400	7,200
Global revolving credit facilities | Estimated Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	1,663,156	558,191
Global revolving credit facilities | Carrying Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	1,663,156	558,191
Unsecured term loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs	4,200	4,800
Unsecured term loan | Estimated Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	1,183,121	1,425,117
Unsecured term loan | Carrying Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit	1,183,121	1,425,117
Unsecured senior notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long-term debt	19,900	18,500
Deferred financing costs	$ 40,600	38,300
Unsecured senior notes | 5.875% notes due 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	5.875%
Unsecured senior notes | 3.400% notes due 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	3.40%
Unsecured senior notes | 3.950% notes due 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	3.95%
Unsecured senior notes | 3.625% notes due 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	3.625%
Unsecured senior notes | 4.750% notes due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	4.75%
Unsecured senior notes | 2.750% notes due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	2.75%
Unsecured senior notes | 2.625% notes due 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	2.625%
Unsecured senior notes | 2.750% notes due 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	2.75%
Unsecured senior notes | 4.750% notes due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	4.75%
Unsecured senior notes | 4.250% notes due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	4.25%
Unsecured senior notes | Estimated Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	$ 7,684,368	6,976,603
Unsecured senior notes | Carrying Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured senior notes	7,629,679	6,608,545
Mortgage loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs	20,200	0
Mortgage loans | Estimated Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans	706,086	106,523
Mortgage loans | Carrying Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans	$ 705,924	$ 106,611

Tenant Leases (Schedule of Futu

Tenant Leases (Schedule of Future Minimum Lease Payments to be Received) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]
2,019	$ 2,225,243
2,020	1,784,585
2,021	1,566,645
2,022	1,263,810
2,023	1,055,553
Thereafter	3,329,052
Total	$ 11,224,888

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Rent expense	$ 85,000	$ 82,500	$ 83,600
Assumption of capital lease obligations upon acquisition	75,030	$ 0	$ 118,923
Commitments related to construction contracts, amount reimbursable	13,400
Commitments related to construction contracts	401,400
Ascenty Acquisition
Business Acquisition [Line Items]
Assumption of capital lease obligations upon acquisition	$ 50,000

Commitments and Contingencies_3

Commitments and Contingencies (Schedule of Future Minimum Lease Payments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2,019	$ 84,712
2,020	87,396
2,021	86,212
2,022	81,976
2,023	80,707
Thereafter	539,047
Total minimum commitment under leases	$ 960,050

Commitments and Contingencies_4

Commitments and Contingencies (Schedule of Future Minimum Capital Lease Payments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,019	$ 11,657
2,020	13,108
2,021	13,207
2,022	13,706
2,023	14,219
Thereafter	285,774
Total minimum lease payments	351,671
Less amount representing interest	(137,827)
Present value	$ 213,844

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Total operating revenues	$ 778,267	$ 768,924	$ 754,919	$ 744,368	$ 731,445	$ 609,925	$ 565,989	$ 550,569	$ 3,046,478	$ 2,457,928	$ 2,142,213
Net income	52,597	90,264	88,159	110,095	79,658	12,475	79,571	84,563	341,115	256,267	431,852
Net income attributable to Digital Realty Trust, Inc.	51,559	87,597	85,463	106,627	73,635	12,435	78,651	83,538	331,246	248,259	426,187
Preferred stock dividends and issuance costs associated with redeemed preferred stock	20,329	20,329	20,329	20,329	20,329	16,575	20,814	17,393	81,316	68,802	83,771
Net income available to common stockholders/unitholders	$ 31,230	$ 67,268	$ 65,134	$ 86,298	$ 53,306	$ (4,140)	$ 57,837	$ 66,145	$ 249,930	$ 173,148	$ 332,088
Basic net income (loss) per share available to common stockholders (in dollars per share)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.42	$ 1.21	$ 0.99	$ 2.21
Diluted net income (loss) per share available to common stockholders (in dollars per share)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.41	$ 1.21	$ 0.99	$ 2.20

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information [Line Items]
Total operating revenues	$ 778,267	$ 768,924	$ 754,919	$ 744,368	$ 731,445	$ 609,925	$ 565,989	$ 550,569	$ 3,046,478	$ 2,457,928	$ 2,142,213
Net income	52,597	90,264	88,159	110,095	79,658	12,475	79,571	84,563	341,115	256,267	431,852
Net income attributable to Digital Realty Trust, L.P.	51,559	87,597	85,463	106,627	73,635	12,435	78,651	83,538	331,246	248,259	426,187
Preferred unit distributions and issuance costs associated with redeemed preferred units	20,329	20,329	20,329	20,329	20,329	16,575	20,814	17,393	81,316	68,802	83,771
Net income available to common stockholders/unitholders	$ 31,230	$ 67,268	$ 65,134	$ 86,298	$ 53,306	$ (4,140)	$ 57,837	$ 66,145	$ 249,930	$ 173,148	$ 332,088
Basic net income (loss) per unit available to common unitholders (in dollars per unit)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.42	$ 1.21	$ 0.99	$ 2.21
Diluted net income (loss) per unit available to common unitholders (in dollars per unit)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.41	$ 1.21	$ 0.99	$ 2.20
Digital Realty Trust, L.P.
Quarterly Financial Information [Line Items]
Total operating revenues	$ 778,267	$ 768,924	$ 754,919	$ 744,368	$ 731,445	$ 609,925	$ 565,989	$ 550,569	$ 3,046,478	$ 2,457,928	$ 2,142,213
Net income	52,597	90,264	88,159	110,095	79,658	12,475	79,571	84,563	341,115	256,267	431,852
Net income attributable to Digital Realty Trust, L.P.	52,859	90,297	88,163	110,107	75,773	12,356	79,458	84,442	341,426	252,029	431,485
Preferred unit distributions and issuance costs associated with redeemed preferred units	20,329	20,329	20,329	20,329	20,329	16,575	20,814	17,393	81,316	68,802	83,771
Net income available to common stockholders/unitholders	$ 32,530	$ 69,968	$ 67,834	$ 89,778	$ 55,444	$ (4,219)	$ 58,644	$ 67,049	$ 260,110	$ 176,918	$ 337,386
Basic net income (loss) per unit available to common unitholders (in dollars per unit)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.42	$ 1.21	$ 0.99	$ 2.21
Diluted net income (loss) per unit available to common unitholders (in dollars per unit)	$ 0.15	$ 0.33	$ 0.32	$ 0.42	$ 0.26	$ (0.02)	$ 0.36	$ 0.41	$ 1.21	$ 0.99	$ 2.20

Schedule III Properties And A_2

Schedule III Properties And Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 705,777
Land, Initial costs	1,476,672
Acquired ground lease, Initial costs	13,509
Buildings and improvements, Initial costs	9,424,451
Improvements, Costs capitalized subsequent to acquisition	7,925,253
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,509,764
Acquired ground lease, Total costs	10,575
Buildings and improvements, Total costs	17,319,546
Total	18,839,885	$ 16,915,936	$ 11,558,469	$ 10,915,373
Accumulated depreciation and amortization	$ (3,935,267)	$ (3,238,227)	$ (2,668,509)	$ (2,251,268)
36 NE 2nd Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	36 NE 2nd Street
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	28,408
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,970
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	52,564
Total	54,534
Accumulated depreciation and amortization	$ (17,441)
2323 Bryan Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	2323 Bryan Street
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	55,942
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,838
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	133,546
Total	135,384
Accumulated depreciation and amortization	$ (71,792)
300 Boulevard East
Real Estate and Accumulated Depreciation [Line Items]
Properties	300 Boulevard East
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	62,649
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,140
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	111,175
Total	116,315
Accumulated depreciation and amortization	$ (67,848)
2334 Lundy Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	2334 Lundy Place
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	67
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,607
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	23,075
Total	26,682
Accumulated depreciation and amortization	$ (10,813)
2440 Marsh Lane
Real Estate and Accumulated Depreciation [Line Items]
Properties	2440 Marsh Lane
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	73,754
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,486
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	84,075
Total	85,561
Accumulated depreciation and amortization	$ (67,865)
375 Riverside Parkway
Real Estate and Accumulated Depreciation [Line Items]
Properties	375 Riverside Parkway
Metropolitan Area	Atlanta
Encumbrances	$ 0
Land, Initial costs	1,250
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	11,578
Improvements, Costs capitalized subsequent to acquisition	31,704
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,250
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	43,282
Total	44,532
Accumulated depreciation and amortization	$ (31,210)
4849 Alpha Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	4849 Alpha Road
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	44,045
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,983
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	54,695
Total	57,678
Accumulated depreciation and amortization	$ (33,311)
600 West Seventh Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	600 West Seventh Street
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	64,912
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	18,489
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	115,725
Total	134,214
Accumulated depreciation and amortization	$ (68,601)
2045 & 2055 Lafayette Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	2045 & 2055 Lafayette Street
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	$ (19,242)
11830 Webb Chapel Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	11830 Webb Chapel Road
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	2,355
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,881
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	36,828
Total	42,709
Accumulated depreciation and amortization	$ (17,373)
150 South First Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	150 South First Street
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	$ (13,631)
200 Paul Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	200 Paul Avenue
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	121,670
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	14,498
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	197,376
Total	211,874
Accumulated depreciation and amortization	$ (87,390)
1100 Space Park Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	1100 Space Park Drive
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	43,082
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,130
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	61,288
Total	66,418
Accumulated depreciation and amortization	$ (34,035)
3015 Winona Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	3015 Winona Avenue
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	$ (3,825)
350 East Cermak Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	350 East Cermak Road
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	236,679
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	8,620
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	339,757
Total	348,377
Accumulated depreciation and amortization	$ (223,795)
8534 Concord Center Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	8534 Concord Center Drive
Metropolitan Area	Denver
Encumbrances	$ 0
Land, Initial costs	2,181
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	11,561
Improvements, Costs capitalized subsequent to acquisition	763
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,181
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	12,324
Total	14,505
Accumulated depreciation and amortization	$ (5,537)
2401 Walsh Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	2401 Walsh Street
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	37
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,775
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	19,304
Total	25,079
Accumulated depreciation and amortization	$ (8,868)
2403 Walsh Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	2403 Walsh Street
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	48
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,514
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	11,743
Total	17,257
Accumulated depreciation and amortization	$ (5,675)
200 North Nash Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	200 North Nash Street
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	232
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,562
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	12,735
Total	17,297
Accumulated depreciation and amortization	$ (6,734)
731 East Trade Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	731 East Trade Street
Metropolitan Area	Charlotte
Encumbrances	$ 1,777
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	(2,599)
Unamortized net premiums	$ 147
113 North Myers
Real Estate and Accumulated Depreciation [Line Items]
Properties	113 North Myers
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	4,762
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,098
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	7,889
Total	8,987
Accumulated depreciation and amortization	$ (2,493)
125 North Myers
Real Estate and Accumulated Depreciation [Line Items]
Properties	125 North Myers
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	6,337
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,271
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	10,075
Total	11,346
Accumulated depreciation and amortization	$ (7,697)
Paul van Vlissingenstraat 16
Real Estate and Accumulated Depreciation [Line Items]
Properties	Paul van Vlissingenstraat 16
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	26,722
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	41,977
Total	41,977
Accumulated depreciation and amortization	$ (20,320)
600-780 S. Federal
Real Estate and Accumulated Depreciation [Line Items]
Properties	600-780 S. Federal
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	35,990
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,975
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	63,745
Total	71,720
Accumulated depreciation and amortization	$ (18,818)
115 Second Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	115 Second Avenue
Metropolitan Area	Boston
Encumbrances	$ 0
Land, Initial costs	1,691
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	12,569
Improvements, Costs capitalized subsequent to acquisition	11,458
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,691
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	24,027
Total	25,718
Accumulated depreciation and amortization	$ (15,050)
Chemin de l’Epinglier 2
Real Estate and Accumulated Depreciation [Line Items]
Properties	Chemin de l’Epinglier 2
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	(558)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	19,513
Total	19,513
Accumulated depreciation and amortization	$ (8,220)
7500 Metro Center Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	7500 Metro Center Drive
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	69,483
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,177
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	74,360
Total	75,537
Accumulated depreciation and amortization	$ (13,685)
3 Corporate Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	3 Corporate Place
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	86,885
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,543
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	99,563
Total	101,106
Accumulated depreciation and amortization	$ (85,242)
1115 Centennial Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	1115 Centennial Avenue
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	58,109
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	581
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	58,109
Total	58,690
Accumulated depreciation and amortization	$ (448)
4025 Midway Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	4025 Midway Road
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	30,842
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,196
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	44,879
Total	47,075
Accumulated depreciation and amortization	$ (30,901)
Clonshaugh Industrial Estate
Real Estate and Accumulated Depreciation [Line Items]
Properties	Clonshaugh Industrial Estate
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	1,685
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	95
Buildings and improvements, Total costs	8,603
Total	8,698
Accumulated depreciation and amortization	$ (5,526)
6800 Millcreek Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	6800 Millcreek Drive
Metropolitan Area	Toronto
Encumbrances	$ 0
Land, Initial costs	1,657
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	11,352
Improvements, Costs capitalized subsequent to acquisition	2,285
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,657
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	13,637
Total	15,294
Accumulated depreciation and amortization	$ (6,984)
101 Aquila Way
Real Estate and Accumulated Depreciation [Line Items]
Properties	101 Aquila Way
Metropolitan Area	Atlanta
Encumbrances	$ 0
Land, Initial costs	1,480
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	34,797
Improvements, Costs capitalized subsequent to acquisition	(11,162)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,556
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	23,559
Total	25,115
Accumulated depreciation and amortization	$ 0
Digital Houston
Real Estate and Accumulated Depreciation [Line Items]
Properties	Digital Houston
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	148,984
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,965
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	172,476
Total	179,441
Accumulated depreciation and amortization	$ (70,198)
120 E Van Buren
Real Estate and Accumulated Depreciation [Line Items]
Properties	120 E Van Buren
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	120,452
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,524
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	278,274
Total	282,798
Accumulated depreciation and amortization	$ (138,607)
Gyroscoopweg 2E-2F
Real Estate and Accumulated Depreciation [Line Items]
Properties	Gyroscoopweg 2E-2F
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	(1,376)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	12,074
Total	12,074
Accumulated depreciation and amortization	$ (5,113)
Clonshaugh Industrial Estate II
Real Estate and Accumulated Depreciation [Line Items]
Properties	Clonshaugh Industrial Estate II
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	79,116
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	79,116
Total	79,116
Accumulated depreciation and amortization	$ (47,814)
600 Winter Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	600 Winter Street
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	$ (2,604)
2300 NW 89th Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	2300 NW 89th Place
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	$ (1,723)
2055 East Technology Circle
Real Estate and Accumulated Depreciation [Line Items]
Properties	2055 East Technology Circle
Metropolitan Area	Phoenix
Encumbrances	$ 0
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	8,519
Improvements, Costs capitalized subsequent to acquisition	30,060
Carry costs, Costs capitalized subsequent to acquisition	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	38,579
Total	38,579
Accumulated depreciation and amortization	$ (30,232)
Unit 9, Blanchardstown Corporate Park
Real Estate and Accumulated Depreciation [Line Items]
Properties	Unit 9, Blanchardstown Corporate Park
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	24,651
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,660
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	64,942
Total	66,602
Accumulated depreciation and amortization	$ (26,209)
111 8th Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	111 8th Avenue
Metropolitan Area	New York
Encumbrances	$ 0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	17,688
Improvements, Costs capitalized subsequent to acquisition	27,230
Carry costs, Costs capitalized subsequent to acquisition	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	44,918
Total	44,918
Accumulated depreciation and amortization	$ (31,402)
8100 Boone Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Properties	8100 Boone Boulevard
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)
21110 Ridgetop Circle
Real Estate and Accumulated Depreciation [Line Items]
Properties	21110 Ridgetop Circle
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	2,934
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	14,311
Improvements, Costs capitalized subsequent to acquisition	1,307
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,934
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	15,618
Total	18,552
Accumulated depreciation and amortization	$ (5,991)
3011 Lafayette Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	3011 Lafayette Street
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	52,300
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,354
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	62,605
Total	65,959
Accumulated depreciation and amortization	$ (51,360)
44470 Chilum Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	44470 Chilum Place
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	$ (12,144)
43881 Devin Shafron Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	43881 Devin Shafron Drive
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	96,033
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,653
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	119,664
Total	124,317
Accumulated depreciation and amortization	$ (96,517)
43831 Devin Shafron Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	43831 Devin Shafron Drive
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	1,382
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,027
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	17,629
Total	20,656
Accumulated depreciation and amortization	$ (6,485)
43791 Devin Shafron Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	43791 Devin Shafron Drive
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	77,914
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,490
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	95,358
Total	98,848
Accumulated depreciation and amortization	$ (61,691)
Mundells Roundabout
Real Estate and Accumulated Depreciation [Line Items]
Properties	Mundells Roundabout
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	41,294
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	20,330
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	52,318
Total	72,648
Accumulated depreciation and amortization	$ (13,558)
1500 Space Park Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	1500 Space Park Drive
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	46,277
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,106
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	55,228
Total	59,334
Accumulated depreciation and amortization	$ (53,527)
Cressex 1
Real Estate and Accumulated Depreciation [Line Items]
Properties	Cressex 1
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	19,302
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,452
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	29,515
Total	31,967
Accumulated depreciation and amortization	$ (20,732)
Naritaweg 52
Real Estate and Accumulated Depreciation [Line Items]
Properties	Naritaweg 52
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	(5,129)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	937
Buildings and improvements, Total costs	18,567
Total	19,504
Accumulated depreciation and amortization	$ (6,048)
1 St. Anne’s Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Properties	1 St. Anne’s Boulevard
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	(804)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	976
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	755
Total	1,731
Accumulated depreciation and amortization	$ (210)
2 St. Anne’s Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Properties	2 St. Anne’s Boulevard
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	32,979
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	650
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	33,946
Total	34,596
Accumulated depreciation and amortization	$ (6,437)
3 St. Anne’s Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Properties	3 St. Anne’s Boulevard
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	79,708
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	14,335
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	103,803
Total	118,138
Accumulated depreciation and amortization	$ (60,140)
365 South Randolphville Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	365 South Randolphville Road
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	301,969
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,023
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	319,369
Total	322,392
Accumulated depreciation and amortization	$ (133,568)
701 & 717 Leonard Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	701 & 717 Leonard Street
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	835
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,165
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	10,769
Total	12,934
Accumulated depreciation and amortization	$ (3,255)
Manchester Technopark
Real Estate and Accumulated Depreciation [Line Items]
Properties	Manchester Technopark
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	(8,161)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	15,757
Total	15,757
Accumulated depreciation and amortization	$ (4,763)
1201 Comstock Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	1201 Comstock Street
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	26,945
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,398
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	27,246
Total	30,644
Accumulated depreciation and amortization	$ (20,433)
1550 Space Park Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	1550 Space Park Drive
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	2,301
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	766
Improvements, Costs capitalized subsequent to acquisition	2,649
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,716
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	5,716
Accumulated depreciation and amortization	$ 0
1525 Comstock Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	1525 Comstock Street
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	31,131
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,061
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	47,579
Total	49,640
Accumulated depreciation and amortization	$ (34,656)
43830 Devin Shafron Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	43830 Devin Shafron Drive
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	74,916
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,509
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	74,916
Total	80,425
Accumulated depreciation and amortization	$ (43,316)
1232 Alma Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	1232 Alma Road
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	65,647
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,266
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	69,388
Total	71,654
Accumulated depreciation and amortization	$ (43,853)
900 Quality Way
Real Estate and Accumulated Depreciation [Line Items]
Properties	900 Quality Way
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	69,489
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,437
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	71,157
Total	72,594
Accumulated depreciation and amortization	$ (21,533)
1210 Integrity Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	1210 Integrity Drive
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	189,102
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,472
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	191,060
Total	194,532
Accumulated depreciation and amortization	$ (6,435)
907 Security Row
Real Estate and Accumulated Depreciation [Line Items]
Properties	907 Security Row
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	97,744
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,112
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	96,309
Total	98,421
Accumulated depreciation and amortization	$ (9,228)
908 Quality Way
Real Estate and Accumulated Depreciation [Line Items]
Properties	908 Quality Way
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	13,948
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,067
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	23,104
Total	25,171
Accumulated depreciation and amortization	$ (18,441)
904 Quality Way
Real Estate and Accumulated Depreciation [Line Items]
Properties	904 Quality Way
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	6,819
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,151
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	7,172
Total	8,323
Accumulated depreciation and amortization	$ (1,194)
1215 Integrity Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	1215 Integrity Drive
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	69,836
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	995
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	68,841
Total	69,836
Accumulated depreciation and amortization	$ (18,600)
1350 Duane & 3080 Raymond
Real Estate and Accumulated Depreciation [Line Items]
Properties	1350 Duane & 3080 Raymond
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	$ (16,611)
45901 & 45845 Nokes Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Properties	45901 & 45845 Nokes Boulevard
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	3,437
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	28,785
Improvements, Costs capitalized subsequent to acquisition	450
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,437
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	29,235
Total	32,672
Accumulated depreciation and amortization	$ (7,366)
21561 & 21571 Beaumeade Circle
Real Estate and Accumulated Depreciation [Line Items]
Properties	21561 & 21571 Beaumeade Circle
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	3,966
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	24,211
Improvements, Costs capitalized subsequent to acquisition	45
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,966
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	24,256
Total	28,222
Accumulated depreciation and amortization	$ (5,631)
60 & 80 Merritt
Real Estate and Accumulated Depreciation [Line Items]
Properties	60 & 80 Merritt
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	97,152
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,418
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	168,629
Total	172,047
Accumulated depreciation and amortization	$ (41,819)
55 Middlesex
Real Estate and Accumulated Depreciation [Line Items]
Properties	55 Middlesex
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	14,043
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	9,975
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	82,406
Total	92,381
Accumulated depreciation and amortization	$ (25,924)
128 First Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	128 First Avenue
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	37,493
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,465
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	222,841
Total	228,306
Accumulated depreciation and amortization	$ (71,312)
Cateringweg 5
Real Estate and Accumulated Depreciation [Line Items]
Properties	Cateringweg 5
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	38,829
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	3,296
Buildings and improvements, Total costs	42,568
Total	45,864
Accumulated depreciation and amortization	$ (8,480)
1725 Comstock Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	1725 Comstock Street
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	39,190
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,274
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	45,757
Total	49,031
Accumulated depreciation and amortization	$ (25,913)
3105 Alfred Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	3105 Alfred Street
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	123,928
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,532
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	127,654
Total	134,186
Accumulated depreciation and amortization	$ (31,190)
365 Main Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	365 Main Street
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	29,725
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	22,854
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	188,434
Total	211,288
Accumulated depreciation and amortization	$ (53,717)
720 2nd Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	720 2nd Street
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	10,865
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,884
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	127,726
Total	131,610
Accumulated depreciation and amortization	$ (33,071)
2260 East El Segundo
Real Estate and Accumulated Depreciation [Line Items]
Properties	2260 East El Segundo
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	15,774
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	11,053
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	67,171
Total	78,224
Accumulated depreciation and amortization	$ (20,837)
2121 South Price Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	2121 South Price Road
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	213,355
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,335
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	451,807
Total	459,142
Accumulated depreciation and amortization	$ (128,398)
4030 Lafayette
Real Estate and Accumulated Depreciation [Line Items]
Properties	4030 Lafayette
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	10,372
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,492
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	27,284
Total	29,776
Accumulated depreciation and amortization	$ (6,863)
4040 Lafayette
Real Estate and Accumulated Depreciation [Line Items]
Properties	4040 Lafayette
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	24,717
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,246
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	28,984
Total	30,230
Accumulated depreciation and amortization	$ (4,778)
4050 Lafayette
Real Estate and Accumulated Depreciation [Line Items]
Properties	4050 Lafayette
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	35,994
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,246
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	40,365
Total	41,611
Accumulated depreciation and amortization	$ (23,551)
2805 Lafayette Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	2805 Lafayette Street
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	130,422
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	8,294
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	149,259
Total	157,553
Accumulated depreciation and amortization	$ (31,988)
29A International Business Park
Real Estate and Accumulated Depreciation [Line Items]
Properties	29A International Business Park
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	213,162
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	350,707
Total	350,707
Accumulated depreciation and amortization	$ (128,018)
43940 Digital Loudoun Plaza
Real Estate and Accumulated Depreciation [Line Items]
Properties	43940 Digital Loudoun Plaza
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	284,883
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,524
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	283,588
Total	291,112
Accumulated depreciation and amortization	$ (74,154)
44060 Digital Loudoun Plaza
Real Estate and Accumulated Depreciation [Line Items]
Properties	44060 Digital Loudoun Plaza
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	187,226
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,441
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	187,485
Total	190,926
Accumulated depreciation and amortization	$ (24,690)
44100 Digital Loudoun Plaza
Real Estate and Accumulated Depreciation [Line Items]
Properties	44100 Digital Loudoun Plaza
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	140,869
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,493
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	141,076
Total	144,569
Accumulated depreciation and amortization	$ (11,587)
43780 Digital Loudoun Plaza
Real Estate and Accumulated Depreciation [Line Items]
Properties	43780 Digital Loudoun Plaza
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	122,489
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,186
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	121,974
Total	126,160
Accumulated depreciation and amortization	$ (6,976)
1-11 Templar Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	1-11 Templar Road
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	62,870
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,367
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	65,440
Total	69,807
Accumulated depreciation and amortization	$ (15,816)
13-23 Templar Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	13-23 Templar Road
Metropolitan Area	Sydney
Land, Initial costs	$ 4,236
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	68,074
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,530
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	68,780
Total	72,310
Accumulated depreciation and amortization	$ (137)
Fountain Court
Real Estate and Accumulated Depreciation [Line Items]
Properties	Fountain Court
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	94,180
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,319
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	107,911
Total	114,230
Accumulated depreciation and amortization	$ (24,250)
72 Radnor Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	72 Radnor Drive
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	66,203
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,749
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	67,022
Total	68,771
Accumulated depreciation and amortization	$ (9,947)
98 Radnor Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	98 Radnor Drive
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	35,692
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,345
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	36,246
Total	37,591
Accumulated depreciation and amortization	$ (15,159)
105 Cabot Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	105 Cabot Street
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	59,267
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,448
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	59,205
Total	61,653
Accumulated depreciation and amortization	$ (9,257)
3825 NW Aloclek Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	3825 NW Aloclek Place
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	58,153
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,689
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	58,153
Total	59,842
Accumulated depreciation and amortization	$ (21,249)
Profile Park
Real Estate and Accumulated Depreciation [Line Items]
Properties	Profile Park
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	73,579
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	9,573
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	70,294
Total	79,867
Accumulated depreciation and amortization	$ (3,982)
760 Doug Davis Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	760 Doug Davis Drive
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	$ (13,384)
2501 S. State Hwy 121
Real Estate and Accumulated Depreciation [Line Items]
Properties	2501 S. State Hwy 121
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	19,180
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	24,612
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	111,648
Total	136,260
Accumulated depreciation and amortization	$ (31,141)
9333 Grand Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	9333 Grand Avenue
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	74,579
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,205
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	93,575
Total	94,780
Accumulated depreciation and amortization	$ (34,196)
9355 Grand Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	9355 Grand Avenue
Metropolitan Area	Chicago
Encumbrances	$ 0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	227,902
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,518
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	225,384
Total	227,902
Accumulated depreciation and amortization	$ (22,298)
9377 Grand Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	9377 Grand Avenue
Metropolitan Area	Chicago
Encumbrances	$ 0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	123,953
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,137
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	121,816
Total	123,953
Accumulated depreciation and amortization	$ (3,683)
850 E Collins
Real Estate and Accumulated Depreciation [Line Items]
Properties	850 E Collins
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	85,337
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,614
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	85,337
Total	86,951
Accumulated depreciation and amortization	$ (19,313)
950 E Collins
Real Estate and Accumulated Depreciation [Line Items]
Properties	950 E Collins
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	75,284
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,546
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	75,284
Total	76,830
Accumulated depreciation and amortization	$ (12,178)
400 S. Akard
Real Estate and Accumulated Depreciation [Line Items]
Properties	400 S. Akard
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	2,657
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	10,075
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	65,387
Total	75,462
Accumulated depreciation and amortization	$ (11,686)
410 Commerce Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Properties	410 Commerce Boulevard
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	30,212
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	30,212
Total	30,212
Accumulated depreciation and amortization	$ (12,866)
Croydon
Real Estate and Accumulated Depreciation [Line Items]
Properties	Croydon
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	40,542
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,277
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	144,676
Total	146,953
Accumulated depreciation and amortization	$ (26,060)
Watford
Real Estate and Accumulated Depreciation [Line Items]
Properties	Watford
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	(6,852)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	6,247
Buildings and improvements, Total costs	213,529
Total	219,776
Accumulated depreciation and amortization	$ (39,423)
Unit 21 Goldsworth Park
Real Estate and Accumulated Depreciation [Line Items]
Properties	Unit 21 Goldsworth Park
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	(159,279)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,735
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	773,449
Total	786,184
Accumulated depreciation and amortization	$ (147,488)
11900 East Cornell
Real Estate and Accumulated Depreciation [Line Items]
Properties	11900 East Cornell
Metropolitan Area	Denver
Encumbrances	$ 0
Land, Initial costs	3,352
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	80,640
Improvements, Costs capitalized subsequent to acquisition	2,796
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,352
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	83,436
Total	86,788
Accumulated depreciation and amortization	$ (17,330)
701 Union Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Properties	701 Union Boulevard
Metropolitan Area	New York
Encumbrances	$ 0
Land, Initial costs	10,045
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	6,755
Improvements, Costs capitalized subsequent to acquisition	25,274
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	42,074
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	42,074
Accumulated depreciation and amortization	$ 0
23 Waterloo Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	23 Waterloo Road
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	(3,534)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,823
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,623
Total	7,446
Accumulated depreciation and amortization	$ (436)
1 Rue Jean-Pierre
Real Estate and Accumulated Depreciation [Line Items]
Properties	1 Rue Jean-Pierre
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	(5,945)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	8,362
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	31,139
Total	39,501
Accumulated depreciation and amortization	$ (6,777)
Liet-dit le Christ de Saclay
Real Estate and Accumulated Depreciation [Line Items]
Properties	Liet-dit le Christ de Saclay
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	(849)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,957
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,686
Total	5,643
Accumulated depreciation and amortization	$ (754)
127 Rue de Paris
Real Estate and Accumulated Depreciation [Line Items]
Properties	127 Rue de Paris
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	(2,548)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,507
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	9,420
Total	16,927
Accumulated depreciation and amortization	$ (2,551)
17201 Waterview Parkway
Real Estate and Accumulated Depreciation [Line Items]
Properties	17201 Waterview Parkway
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	2,070
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	6,409
Improvements, Costs capitalized subsequent to acquisition	42
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	2,070
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	6,451
Total	8,521
Accumulated depreciation and amortization	$ (1,253)
1900 S. Price Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	1900 S. Price Road
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	982
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,512
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	17,825
Total	23,337
Accumulated depreciation and amortization	$ (2,217)
371 Gough Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	371 Gough Road
Metropolitan Area	Toronto
Encumbrances	$ 0
Land, Initial costs	7,394
Buildings and improvements, Initial costs	677
Improvements, Costs capitalized subsequent to acquisition	87,318
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	5,560
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	89,829
Total	95,389
Accumulated depreciation and amortization	$ (9,855)
1500 Towerview Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	1500 Towerview Road
Metropolitan Area	Minneapolis
Encumbrances	$ 0
Land, Initial costs	10,190
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	$ (4,857)
Principal Park
Real Estate and Accumulated Depreciation [Line Items]
Properties	Principal Park
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	11,837
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	104,084
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,343
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	103,578
Total	115,921
Accumulated depreciation and amortization	$ (9,625)
Liverpoolweg 10
Real Estate and Accumulated Depreciation [Line Items]
Properties	Liverpoolweg 10
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	733
Buildings and improvements, Initial costs	3,122
Improvements, Costs capitalized subsequent to acquisition	9,730
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	644
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	12,941
Total	13,585
Accumulated depreciation and amortization	$ (2,482)
DePresident
Real Estate and Accumulated Depreciation [Line Items]
Properties	DePresident
Metropolitan Area	Amsterdam
Encumbrances	$ 0
Land, Initial costs	6,737
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	117,156
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,858
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	116,035
Total	123,893
Accumulated depreciation and amortization	$ (2,506)
Crawley 2
Real Estate and Accumulated Depreciation [Line Items]
Properties	Crawley 2
Metropolitan Area	London
Encumbrances	$ 0
Land, Initial costs	24,305
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	60,285
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	26,637
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	57,953
Total	84,590
Accumulated depreciation and amortization	$ (463)
Digital Deer Park 3
Real Estate and Accumulated Depreciation [Line Items]
Properties	Digital Deer Park 3
Metropolitan Area	Melbourne
Encumbrances	$ 0
Land, Initial costs	1,600
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	3
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,603
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	1,603
Accumulated depreciation and amortization	$ 0
3 Loyang Way
Real Estate and Accumulated Depreciation [Line Items]
Properties	3 Loyang Way
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	168,365
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	168,365
Total	168,365
Accumulated depreciation and amortization	$ (3,961)
Digital Loudoun III
Real Estate and Accumulated Depreciation [Line Items]
Properties	Digital Loudoun III
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	572,790
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	60,358
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	555,432
Total	615,790
Accumulated depreciation and amortization	$ (6,648)
Digital Frankfurt
Real Estate and Accumulated Depreciation [Line Items]
Properties	Digital Frankfurt
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	101,172
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	9,987
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	96,728
Total	106,715
Accumulated depreciation and amortization	$ (934)
56 Marietta Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	56 Marietta Street
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	22,788
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	1,700
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	234,185
Total	235,885
Accumulated depreciation and amortization	$ (30,981)
2 Peekay Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	2 Peekay Drive
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	38,235
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	153,674
Total	153,674
Accumulated depreciation and amortization	$ (25,011)
100 Delawanna Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	100 Delawanna Avenue
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	7,043
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,600
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	92,481
Total	96,081
Accumulated depreciation and amortization	$ (10,686)
60 Hudson Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	60 Hudson Street
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	13,709
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	45,989
Total	45,989
Accumulated depreciation and amortization	$ (12,278)
32 Avenue of the Americas
Real Estate and Accumulated Depreciation [Line Items]
Properties	32 Avenue of the Americas
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	3,457
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	34,437
Total	34,437
Accumulated depreciation and amortization	$ (8,693)
3433 S 120th Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	3433 S 120th Place
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	2,324
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	14,012
Total	14,012
Accumulated depreciation and amortization	$ (4,818)
8435 Stemmons Freeway
Real Estate and Accumulated Depreciation [Line Items]
Properties	8435 Stemmons Freeway
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	2,236
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	7,259
Total	7,259
Accumulated depreciation and amortization	$ (2,097)
2625 Walsh Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	2625 Walsh Avenue
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	7,768
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	12,044
Total	12,044
Accumulated depreciation and amortization	$ (2,626)
111 8th Avenue - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	111 8th Avenue - Telx
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	14,422
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	56,876
Total	56,876
Accumulated depreciation and amortization	$ (16,822)
350 East Cermak Road - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	350 East Cermak Road - Telx
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	8,163
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	22,096
Total	22,096
Accumulated depreciation and amortization	$ (5,499)
200 Paul Avenue - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	200 Paul Avenue - Telx
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	3,322
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	10,041
Total	10,041
Accumulated depreciation and amortization	$ (2,750)
2323 Bryan Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	2323 Bryan Street - Telx
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	3,770
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	8,961
Total	8,961
Accumulated depreciation and amortization	$ (2,578)
600 W. 7th Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	600 W. 7th Street - Telx
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	5,096
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	8,785
Total	8,785
Accumulated depreciation and amortization	$ (1,851)
3825 NW Aloclek Place - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	3825 NW Aloclek Place - Telx
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	1,104
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	4,235
Total	4,235
Accumulated depreciation and amortization	$ (1,316)
120 E. Van Buren Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	120 E. Van Buren Street - Telx
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	2,407
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	5,255
Total	5,255
Accumulated depreciation and amortization	$ (1,299)
36 NE 2nd Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	36 NE 2nd Street - Telx
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	2,806
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	4,648
Total	4,648
Accumulated depreciation and amortization	$ (1,238)
600-780 S. Federal Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	600-780 S. Federal Street - Telx
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	3,227
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	5,042
Total	5,042
Accumulated depreciation and amortization	$ (1,035)
113 N. Myers Street - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	113 N. Myers Street - Telx
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	746
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	1,222
Total	1,222
Accumulated depreciation and amortization	$ (268)
1100 Space Park Drive - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	1100 Space Park Drive - Telx
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	1,122
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	1,474
Total	1,474
Accumulated depreciation and amortization	$ (233)
300 Boulevard East - Telx
Real Estate and Accumulated Depreciation [Line Items]
Properties	300 Boulevard East - Telx
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	55
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	252
Total	252
Accumulated depreciation and amortization	$ (139)
Science Park
Real Estate and Accumulated Depreciation [Line Items]
Properties	Science Park
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	22,517
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	693
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	97,584
Total	98,277
Accumulated depreciation and amortization	$ (6,905)
Sovereign House
Real Estate and Accumulated Depreciation [Line Items]
Properties	Sovereign House
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	36,988
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	120,115
Total	120,115
Accumulated depreciation and amortization	$ (12,253)
Amstel Business Park
Real Estate and Accumulated Depreciation [Line Items]
Properties	Amstel Business Park
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	14,086
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	3,096
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	72,119
Total	75,215
Accumulated depreciation and amortization	$ (14,666)
Olivers Yard
Real Estate and Accumulated Depreciation [Line Items]
Properties	Olivers Yard
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	1,353
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,780
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	36,260
Total	44,040
Accumulated depreciation and amortization	$ (10,089)
Bonnington House
Real Estate and Accumulated Depreciation [Line Items]
Properties	Bonnington House
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	72,272
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	174
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	86,225
Total	86,399
Accumulated depreciation and amortization	$ (2,805)
West Drayton
Real Estate and Accumulated Depreciation [Line Items]
Properties	West Drayton
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	1,469
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	11,604
Total	11,604
Accumulated depreciation and amortization	$ (4,750)
Lyonerstrasse
Real Estate and Accumulated Depreciation [Line Items]
Properties	Lyonerstrasse
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	3,140
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	11,547
Total	11,547
Accumulated depreciation and amortization	$ (3,568)
Meridian Gate
Real Estate and Accumulated Depreciation [Line Items]
Properties	Meridian Gate
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	692
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	6,585
Total	6,585
Accumulated depreciation and amortization	$ (2,538)
NE Corner of Campbell Road and Ferris Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	NE Corner of Campbell Road and Ferris Road
Metropolitan Area	Dallas
Encumbrances	$ 0
Land, Initial costs	21,902
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	795
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	22,685
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	12
Total	22,697
Accumulated depreciation and amortization	$ 0
9401 West Grand Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	9401 West Grand Avenue
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	12,500
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	89,688
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	17,363
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	84,825
Total	102,188
Accumulated depreciation and amortization	$ 0
Broad Run Technology Park
Real Estate and Accumulated Depreciation [Line Items]
Properties	Broad Run Technology Park
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	18,019
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	14,998
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	27,963
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	5,054
Total	33,017
Accumulated depreciation and amortization	$ 0
2425-2553 Edgington Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	2425-2553 Edgington Street
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	43
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	11,959
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	1,649
Total	13,608
Accumulated depreciation and amortization	$ (99)
44490 Chilum Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	44490 Chilum Place
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	4,180
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	76,745
Improvements, Costs capitalized subsequent to acquisition	1,166
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,180
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	77,911
Total	82,091
Accumulated depreciation and amortization	$ (6,086)
44520 Hastings Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	44520 Hastings Drive
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	1,050
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	6,140
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	109,155
Total	115,295
Accumulated depreciation and amortization	$ (8,271)
44480 Hastings Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	44480 Hastings Drive
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	426
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,860
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	278,810
Total	291,670
Accumulated depreciation and amortization	$ (21,536)
44521 Hastings Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	44521 Hastings Drive
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	307
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	13,210
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	315,846
Total	329,056
Accumulated depreciation and amortization	$ (24,425)
44461 Chilum Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	44461 Chilum Place
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	282
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	9,620
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	249,653
Total	259,273
Accumulated depreciation and amortization	$ (19,418)
21625 Gresham Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	21625 Gresham Drive
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	74
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	17,500
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	449,042
Total	466,542
Accumulated depreciation and amortization	$ (35,066)
21745 Sir Timothy Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	21745 Sir Timothy Drive
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	16,010
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	289,281
Improvements, Costs capitalized subsequent to acquisition	6,171
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	16,010
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	295,452
Total	311,462
Accumulated depreciation and amortization	$ (17,418)
21744 Sir Timothy Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	21744 Sir Timothy Drive
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	10,523
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	50,411
Improvements, Costs capitalized subsequent to acquisition	176,111
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	10,739
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	226,306
Total	237,045
Accumulated depreciation and amortization	$ (4,924)
2200 Busse Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	2200 Busse Road
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	1,251
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	17,270
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	385,809
Total	403,079
Accumulated depreciation and amortization	$ (28,401)
2299 Busse Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	2299 Busse Road
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	(1,701)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,780
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	346,647
Total	359,427
Accumulated depreciation and amortization	$ (26,551)
1780 Business Center Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	1780 Business Center Drive
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	353
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,510
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	106,716
Total	114,226
Accumulated depreciation and amortization	$ (7,275)
8217 Linton Hall Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	8217 Linton Hall Road
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	343
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	22,340
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	82,328
Total	104,668
Accumulated depreciation and amortization	$ (5,266)
1400 East Devon Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	1400 East Devon Avenue
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	60,449
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	11,261
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	238,827
Total	250,088
Accumulated depreciation and amortization	$ (6,732)
2220 De La Cruz Blvd
Real Estate and Accumulated Depreciation [Line Items]
Properties	2220 De La Cruz Blvd
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	2,038
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	84,650
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	636,045
Total	720,695
Accumulated depreciation and amortization	$ (43,502)
1 Century Place
Real Estate and Accumulated Depreciation [Line Items]
Properties	1 Century Place
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	67,153
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	25,557
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	185,059
Total	210,616
Accumulated depreciation and amortization	$ (1,001)
505 North Railroad Avenue
Real Estate and Accumulated Depreciation [Line Items]
Properties	505 North Railroad Avenue
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	983
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	16,513
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	250,711
Total	267,224
Accumulated depreciation and amortization	$ (6,441)
250 Williams
Real Estate and Accumulated Depreciation [Line Items]
Properties	250 Williams
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	24,088
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	24,088
Total	24,088
Accumulated depreciation and amortization	$ (3,102)
CME Agreement
Real Estate and Accumulated Depreciation [Line Items]
Properties	CME Agreement
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	41,478
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	41,478
Total	41,478
Accumulated depreciation and amortization	$ (14,659)
Osaka 2
Real Estate and Accumulated Depreciation [Line Items]
Properties	Osaka 2
Metropolitan Area	Osaka
Encumbrances	$ 0
Land, Initial costs	13,593
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	104,994
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	15,489
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	103,098
Total	118,587
Accumulated depreciation and amortization	$ 0
Osaka 3
Real Estate and Accumulated Depreciation [Line Items]
Properties	Osaka 3
Metropolitan Area	Osaka
Encumbrances	$ 0
Land, Initial costs	4,713
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	249
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,962
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	4,962
Accumulated depreciation and amortization	$ 0
De President II
Real Estate and Accumulated Depreciation [Line Items]
Properties	De President II
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	2,905
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,095
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,125
Total	9,220
Accumulated depreciation and amortization	$ 0
Development Property -- N. Virginia
Real Estate and Accumulated Depreciation [Line Items]
Properties	Development Property -- N. Virginia
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	16,200
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	573
Improvements, Costs capitalized subsequent to acquisition	267
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	17,026
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	14
Total	17,040
Accumulated depreciation and amortization	$ (2)
Development Property -- Portland
Real Estate and Accumulated Depreciation [Line Items]
Properties	Development Property -- Portland
Metropolitan Area	Portland
Encumbrances	$ 0
Land, Initial costs	11,672
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	5,924
Improvements, Costs capitalized subsequent to acquisition	8,798
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,179
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	14,215
Total	26,394
Accumulated depreciation and amortization	$ (1)
Development Property -- Phoenix
Real Estate and Accumulated Depreciation [Line Items]
Properties	Development Property -- Phoenix
Metropolitan Area	Phoenix
Encumbrances	$ 0
Land, Initial costs	12,500
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	732
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	12,998
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	234
Total	13,232
Accumulated depreciation and amortization	$ (1)
330 E. Cermak Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	330 E. Cermak Road
Metropolitan Area	Chicago
Encumbrances	$ 0
Land, Initial costs	25,248
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	(1)
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	25,247
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	25,247
Accumulated depreciation and amortization	$ 0
10000-10006 Godwin Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	10000-10006 Godwin Drive
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	17,308
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	2,990
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	18,239
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	2,059
Total	20,298
Accumulated depreciation and amortization	$ 0
2825-2845 Lafayette Street
Real Estate and Accumulated Depreciation [Line Items]
Properties	2825-2845 Lafayette Street
Metropolitan Area	Silicon Valley
Encumbrances	$ 0
Land, Initial costs	56,000
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	56,000
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	3,001
Total	59,001
Accumulated depreciation and amortization	$ (1,574)
9905 Godwin Drive
Real Estate and Accumulated Depreciation [Line Items]
Properties	9905 Godwin Drive
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	5,819
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	1,583
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,402
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	7,402
Accumulated depreciation and amortization	$ 0
Pacific Boulevard and S. Sterling Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Properties	Pacific Boulevard and S. Sterling Boulevard
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	27,139
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	1,073
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	28,145
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	67
Total	28,212
Accumulated depreciation and amortization	$ 0
160 Lockwood Road
Real Estate and Accumulated Depreciation [Line Items]
Properties	160 Lockwood Road
Metropolitan Area	Sydney
Encumbrances	$ 0
Land, Initial costs	7,664
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	54
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	7,718
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	7,718
Accumulated depreciation and amortization	$ 0
Western Lands
Real Estate and Accumulated Depreciation [Line Items]
Properties	Western Lands
Metropolitan Area	N. Virginia
Encumbrances	$ 0
Land, Initial costs	238,141
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	1,694
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	239,835
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	239,835
Accumulated depreciation and amortization	$ 0
Osaka 4
Real Estate and Accumulated Depreciation [Line Items]
Properties	Osaka 4
Metropolitan Area	Osaka
Encumbrances	$ 0
Land, Initial costs	4,633
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	140
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	4,773
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	0
Total	4,773
Accumulated depreciation and amortization	$ 0
Ascenty
Real Estate and Accumulated Depreciation [Line Items]
Properties	Ascenty
Metropolitan Area	Brazil
Encumbrances	$ 600,000
Land, Initial costs	0
Acquired ground lease, Initial costs	0
Buildings and improvements, Initial costs	425,000
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	425,000
Total	425,000
Accumulated depreciation and amortization	$ 0
Other
Real Estate and Accumulated Depreciation [Line Items]
Properties	Other
Encumbrances	$ 0
Land, Initial costs	8,298
Buildings and improvements, Initial costs	0
Improvements, Costs capitalized subsequent to acquisition	61,236
Carry costs, Costs capitalized subsequent to acquisition	0
Land, Total costs	0
Acquired ground lease, Total costs	0
Buildings and improvements, Total costs	69,534
Total	69,534
Accumulated depreciation and amortization	$ (11,510)

Schedule III Properties And A_3

Schedule III Properties And Accumulated Depreciation (Narrative) (Details) $ in Billions	Dec. 31, 2018USD ($)
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Aggregate gross cost of properties for federal income tax purposes	$ 19.4

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, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, beginning of year	$ 16,915,936	$ 11,558,469	$ 10,915,373
Additions during period (acquisitions and improvements)	2,008,032	5,663,404	760,051
Deductions during period (dispositions, impairments and assets held for sale)	(84,083)	(305,937)	(116,955)
Balance, end of year	$ 18,839,885	$ 16,915,936	$ 11,558,469

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, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, beginning of year	$ 3,238,227	$ 2,668,509	$ 2,251,268
Additions during period (depreciation and amortization expense)	714,336	612,970	461,506
Deductions during period (dispositions and assets held for sale)	(17,296)	(43,252)	(44,265)
Balance, end of year	$ 3,935,267	$ 3,238,227	$ 2,668,509

Subsequent Events (Details)

Subsequent Events (Details)	Feb. 19, 2019USD ($)	Jan. 18, 2019USD ($)	Jan. 17, 2019USD ($)	Jan. 16, 2019EUR (€)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
5.875% notes due 2020 | Senior notes
Subsequent Event [Line Items]
Stated interest rate					5.875%
Digital Realty Trust, L.P.
Subsequent Event [Line Items]
Long-term debt, gross					$ 11,201,590,000
Digital Realty Trust, L.P. | Senior notes
Subsequent Event [Line Items]
Long-term debt, gross					7,649,538,000
Digital Realty Trust, L.P. | 5.875% notes due 2020 | Senior notes
Subsequent Event [Line Items]
Debt face amount					$ 500,000,000
Stated interest rate					5.875%
Proceeds form debt, net of issuance costs					$ 487,100,000
Long-term debt, gross					$ 500,000,000	$ 500,000,000
Subsequent Event | Digital Realty Trust, L.P. | 2.500% Notes Due 2026
Subsequent Event [Line Items]
Debt face amount | €				€ 850,000,000
Stated interest rate				2.50%
Proceeds form debt, net of issuance costs | €				€ 843,500,000
Subsequent Event | Digital Realty Trust, L.P. | 5.875% notes due 2020 | Senior notes
Subsequent Event [Line Items]
Amount not withdrawn			$ 350,100,000
Redemption price percentage		102.031%	70.02%
Tender offering consideration per transaction	$ 2.937500	$ 1,020.31	$ 1,022.81
Debt amount per transaction		1,000	1,000
Proceeds from sale of stock			$ 367,700,000
Withdrawn amount		$ 149,900,000