Debt of the Company (Details)	Dec. 31, 2020	Oct. 14, 2020	Dec. 31, 2019
0.125% notes due 2022 | Digital Dutch Finco B.V.
Debt Instrument
Stated interest rate	0.125%		0.125%
2.750% notes due 2023 | Digital Realty Trust, L.P.
Debt Instrument
Stated interest rate	2.75%		2.75%
2.625% notes due 2024 | Digital Euro Finco, LLC
Debt Instrument
Stated interest rate	2.625%		2.625%
2.750% notes due 2024 | Digital Stout Holding, LLC
Debt Instrument
Stated interest rate	2.75%		2.75%
4.250% notes due 2025 | Digital Stout Holding, LLC
Debt Instrument
Stated interest rate	4.25%		4.25%
0.625% notes due 2025 | Digital Dutch Finco B.V.
Debt Instrument
Stated interest rate	0.625%		0.625%
4.750% notes due 2025 | Digital Realty Trust, L.P.
Debt Instrument
Stated interest rate	4.75%
4.750% notes due 2025 | Digital Delta Holding, LLC
Debt Instrument
Stated interest rate	4.75%		4.75%
2.500% notes due 2026 | Digital Euro Finco, LLC
Debt Instrument
Stated interest rate	2.50%		2.50%
3.700% notes due 2027 | Digital Realty Trust, L.P.
Debt Instrument
Stated interest rate	3.70%		3.70%
1.125% notes due 2028 | Digital Euro Finco, LLC
Debt Instrument
Stated interest rate	1.125%		1.125%
4.450% notes due 2028 | Digital Realty Trust, L.P.
Debt Instrument
Stated interest rate	4.45%		4.45%
3.600% notes due 2029 | Digital Realty Trust, L.P.
Debt Instrument
Stated interest rate	3.60%		3.60%
3.300% notes due 2029 | Digital Stout Holding, LLC
Debt Instrument
Stated interest rate	3.30%		3.30%
1.500% notes due 2030 | Digital Dutch Finco B.V.
Debt Instrument
Stated interest rate	1.50%		1.50%
3.750% notes due 2030 | Digital Stout Holding, LLC
Debt Instrument
Stated interest rate	3.75%		3.75%
1.250% notes due 2031 | Digital Dutch Finco B.V.
Debt Instrument
Stated interest rate	1.25%		1.25%
1.000% notes due 2032 | Digital Dutch Finco B.V.
Debt Instrument
Stated interest rate	1.00%		1.00%
Senior Notes. | 4.750% notes due 2023 | Digital Realty Trust, L.P.
Debt Instrument
Stated interest rate		4.75%