XML 61 R49.htm IDEA: XBRL DOCUMENT v3.20.2
Partnership Units and Related Matters - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2020
Oct. 31, 2015
Jun. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Limited Partners Capital Account [Line Items]          
Capital contributions to partnership     $ 50.0    
Preferred unit, issued   5,000,000      
Distributions from partnership       $ 5.6 $ 5.6
Subsequent Event [Member]          
Limited Partners Capital Account [Line Items]          
Distributions declaration month 2020-07        
Distribution declared $ 0.1875        
Distributions from partnership $ 0.9        
Distributions payable date Aug. 17, 2020        
Series A Preferred Units due November 1, 2020 [Member] | London Interbank Offered Rate (LIBOR)          
Limited Partners Capital Account [Line Items]          
Percentage of variable interest rate for distribution on preferred units upon maturity   7.71%      
Series A Preferred Units [Member]          
Limited Partners Capital Account [Line Items]          
Preferred unit, dividend interest rate   9.00%      
Series A Cumulative Redeemable Perpetual Preferred Units [Member]          
Limited Partners Capital Account [Line Items]          
Distribution to preferred unitholders     $ 2.8 $ 5.6  
Holders of Limited Partner Interests [Member]          
Limited Partners Capital Account [Line Items]          
Limited partner capital contribution allocation percentage       98.00%  
Targa Resources Genaral Partner LLC [Member]          
Limited Partners Capital Account [Line Items]          
General partner capital contribution allocation percentage       2.00%