Condensed Consolidated Income Statements (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating Revenues:
Rental	$ 260,052	$ 206,846	$ 717,809	$ 606,447
Tenant reimbursements	78,878	56,656	197,162	159,801
Construction management	2,497	9,372	6,903	24,948
Other	1,052	602	7,457	902
Total operating revenues	342,479	273,476	929,331	792,098
Operating Expenses:
Rental property operating and maintenance	106,660	82,164	274,081	226,224
Property taxes	17,982	13,055	49,793	40,488
Insurance	2,463	1,961	6,953	6,010
Construction management	623	7,391	1,412	20,327
Depreciation and amortization	101,840	79,047	274,835	229,813
General and administrative	14,409	14,600	43,768	41,082
Transactions	504	3,632	5,789	5,053
Other	923		1,260	90
Total operating expenses	245,404	201,850	657,891	569,087
Operating income	97,075	71,626	271,440	223,011
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	1,520	1,390	6,402	3,656
Interest and other income	83	2,218	2,008	2,862
Interest expense	(41,047)	(37,078)	(116,758)	(112,494)
Tax expense	(710)	(461)	(2,637)	(1,122)
Loss from early extinguishment of debt		(6)	(303)	(984)
Net income	56,921	37,689	160,152	114,929
Net income attributable to noncontrolling interests	(1,529)	(1,345)	(4,384)	(4,380)
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	(55,392)	(36,344)	(155,768)	(110,549)
Preferred stock dividends/Preferred units distributions	(9,777)	(4,436)	(28,921)	(15,671)
Net income available to common stockholders/unitholders	45,615	31,908	126,847	94,878
Net income per share/unit available to common stockholders/unitholders:
Basic	$ 0.37	$ 0.32	$ 1.12	$ 0.99
Diluted	$ 0.37	$ 0.31	$ 1.12	$ 0.97
Weighted average common shares/units outstanding:
Basic	122,026,421	100,588,235	112,995,512	96,137,611
Diluted	122,353,511	101,912,342	113,275,221	97,316,650
Digital Realty Trust, L.P. [Member]
Operating Revenues:
Rental	260,052	206,846	717,809	606,447
Tenant reimbursements	78,878	56,656	197,162	159,801
Construction management	2,497	9,372	6,903	24,948
Other	1,052	602	7,457	902
Total operating revenues	342,479	273,476	929,331	792,098
Operating Expenses:
Rental property operating and maintenance	106,660	82,164	274,081	226,224
Property taxes	17,982	13,055	49,793	40,488
Insurance	2,463	1,961	6,953	6,010
Construction management	623	7,391	1,412	20,327
Depreciation and amortization	101,840	79,047	274,835	229,813
General and administrative	14,409	14,600	43,768	41,082
Transactions	504	3,632	5,789	5,053
Other	923		1,260	90
Total operating expenses	245,404	201,850	657,891	569,087
Operating income	97,075	71,626	271,440	223,011
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures	1,520	1,390	6,402	3,656
Interest and other income	83	2,218	2,008	2,862
Interest expense	(41,047)	(37,078)	(116,758)	(112,494)
Tax expense	(710)	(461)	(2,637)	(1,122)
Loss from early extinguishment of debt		(6)	(303)	(984)
Net income	56,921	37,689	160,152	114,929
Net loss attributable to noncontrolling interests in consolidated joint ventures	45	76	437	275
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P.	56,966	37,765	160,589	115,204
Preferred stock dividends/Preferred units distributions	(9,777)	(4,436)	(28,921)	(15,671)
Net income available to common stockholders/unitholders	$ 47,189	$ 33,329	$ 131,668	$ 99,533
Net income per share/unit available to common stockholders/unitholders:
Basic	$ 0.37	$ 0.32	$ 1.12	$ 0.99
Diluted	$ 0.37	$ 0.31	$ 1.12	$ 0.97
Weighted average common shares/units outstanding:
Basic	126,242,751	105,069,280	117,291,480	100,845,740
Diluted	126,569,841	106,393,387	117,571,189	102,024,779