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Debt of the Operating Partnership (4.25% Notes Due 2025) (Narrative) (Details)
$ in Thousands
12 Months Ended
Jan. 18, 2013
USD ($)
$ / £
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Jan. 18, 2013
GBP (£)
$ / £
Debt Instrument [Line Items]          
Borrowings of unsecured senior notes   $ 766,201 $ 0 $ 0  
Unsecured senior notes          
Debt Instrument [Line Items]          
Deferred financing costs, net   $ 25,400 26,000    
4.250% notes due 2025 | Unsecured senior notes          
Debt Instrument [Line Items]          
Interest rate   4.25%      
Digital Realty Trust, L.P.          
Debt Instrument [Line Items]          
Unamortized discount   $ 15,649      
Borrowings of unsecured senior notes   766,201 0 $ 0  
Digital Realty Trust, L.P. | Unsecured senior notes          
Debt Instrument [Line Items]          
Unamortized discount   15,649 17,914    
Deferred financing costs, net   $ 25,374 $ 26,037    
Digital Realty Trust, L.P. | 4.250% notes due 2025 | Unsecured senior notes          
Debt Instrument [Line Items]          
Debt face amount $ 634,800       £ 400,000,000
Interest rate 4.25% 4.25%     4.25%
Unamortized discount $ 4,800        
Deferred financing costs, net 5,800        
Borrowings of unsecured senior notes $ 624,200        
Leverage ratio percentage   60.00%      
Secured debt ratio percentage   40.00%      
Interest coverage ratio   1.50      
Unencumbered assets to unsecured debt   150.00%      
Digital Realty Trust, L.P. | 4.250% notes due 2025 | British pound sterling (£) | Unsecured senior notes          
Debt Instrument [Line Items]          
Exchange rate (in usd per gbp) | $ / £ 1.59       1.59