Capital And Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net, Beginning balance	$ (12,191)
Net current period change	(61,990)
Reclassification to interest expense from interest rate swaps	1,708
Accumulated other comprehensive loss, net, Ending balance	(72,473)
Digital Realty Trust, L.P. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net, Beginning balance	(14,910)
Net current period change	(63,187)
Reclassification to interest expense from interest rate swaps	1,741
Accumulated other comprehensive loss, net, Ending balance	(76,356)
Cash Flow Hedge Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net, Beginning balance	(9,615)
Net current period change	(122)
Reclassification to interest expense from interest rate swaps	1,708
Accumulated other comprehensive loss, net, Ending balance	(8,029)
Cash Flow Hedge Adjustments [Member] | Digital Realty Trust, L.P. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net, Beginning balance	(10,509)
Net current period change	(124)
Reclassification to interest expense from interest rate swaps	1,741
Accumulated other comprehensive loss, net, Ending balance	(8,892)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net, Beginning balance	(2,576)
Net current period change	(61,868)
Accumulated other comprehensive loss, net, Ending balance	(64,444)
Foreign Currency Translation Adjustments [Member] | Digital Realty Trust, L.P. [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net, Beginning balance	(4,401)
Net current period change	(63,063)
Accumulated other comprehensive loss, net, Ending balance	$ (67,464)