Debt of the Operating Partnership (Global Revolving Credit Facilities) (Narrative) (Details) - Digital Realty Trust, L.P. $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) item
Global revolving credit facilities, net
Debt Instrument [Line Items]
Number of extension options | item	2
Debt instrument, extension term	6 months
Interest rate basis spread	0.90%
Commitment fee percentage	0.20%
Letters of credit issued | $	$ 55.3
Yen Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fee percentage	0.50%