Quarterly Financial Information (Digital Realty Trust, L.P.) (Summary Of Selected Quarterly Financial Data) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information [Line Items]
Total operating revenues	$ 380,931	$ 379,456	$ 363,502	$ 358,370	$ 349,736	$ 342,479	$ 303,704	$ 283,148	$ 1,482,259	$ 1,279,067	$ 1,062,710
Net income	55,667	153,480	59,621	51,681	55,895	56,921	53,968	49,263	320,449	216,047	162,126
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P	54,703	150,598	58,476	50,711	54,566	55,392	52,334	48,042	314,488	210,334	156,265
Preferred stock/unit dividends/distributions	11,726	11,726	11,399	8,054	9,751	9,777	10,313	8,831	42,905	38,672	25,397
Net income available to common stockholders	42,977	138,872	47,077	42,657	44,815	45,615	42,021	39,211	271,583	171,662	130,868
Basic net income per share available to common stockholders/unitholders	$ 0.33	$ 1.08	$ 0.37	$ 0.34	$ 0.36	$ 0.37	$ 0.38	$ 0.37	$ 2.12	$ 1.48	$ 1.33
Diluted net income per share available to common stockholders/unitholders	$ 0.33	$ 1.06	$ 0.37	$ 0.34	$ 0.36	$ 0.37	$ 0.38	$ 0.36	$ 2.12	$ 1.48	$ 1.32
Digital Realty Trust, L.P. [Member]
Quarterly Financial Information [Line Items]
Total operating revenues	380,931	379,456	363,502	358,370	349,736	342,479	303,704	283,148	1,482,259	1,279,067	1,062,710
Net income	55,667	153,480	59,621	51,681	55,895	56,921	53,968	49,263	320,449	216,047	162,126
Net income attributable to Digital Realty Trust, Inc./Digital Realty Trust, L.P	55,552	153,355	59,412	51,535	55,902	56,966	53,995	49,628	319,854	216,491	162,450
Preferred stock/unit dividends/distributions	11,726	11,726	11,399	8,054	9,751	9,777	10,313	8,831	42,905	38,672	25,397
Net income available to common stockholders	$ 43,826	$ 141,629	$ 48,013	$ 43,481	$ 46,151	$ 47,189	$ 43,682	$ 40,797	$ 276,949	$ 177,819	$ 137,053
Basic net income per share available to common stockholders/unitholders	$ 0.33	$ 1.08	$ 0.37	$ 0.34	$ 0.36	$ 0.37	$ 0.38	$ 0.37	$ 2.12	$ 1.48	$ 1.33
Diluted net income per share available to common stockholders/unitholders	$ 0.33	$ 1.06	$ 0.37	$ 0.34	$ 0.36	$ 0.37	$ 0.38	$ 0.36	$ 2.12	$ 1.48	$ 1.32