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Organization (Details)
ft² in Thousands
12 Months Ended
Dec. 31, 2019
ft²
market
property
subsidiary
segment
Real Estate Properties [Line Items]  
Number of wholly owned subsidiaries | subsidiary 2
Number of real estate properties 4
Rentable square feet | ft² 16,000
Number of operating segments | segment 1
Piedmont Office Realty Trust, Inc.  
Real Estate Properties [Line Items]  
Percentage ownership by sole general partner 99.90%
Piedmont Office Holdings, Inc  
Real Estate Properties [Line Items]  
Percentage ownership by sole limited partner 0.10%
US  
Real Estate Properties [Line Items]  
Number of office markets | market 7
In-Service Office Properties  
Real Estate Properties [Line Items]  
Number of real estate properties 54
Percentage of Class A commercial office space 91.20%
Redevelopment Asset  
Real Estate Properties [Line Items]  
Number of real estate properties 1
Rentable square feet | ft² 487