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Debt Obligations - Range of Interest Rates and Weighted Average Interest Rate Incurred on Variable Rate Debt Obligations (Details)
Jun. 30, 2022
TRGP Revolver [Member]  
Debt Instrument [Line Items]  
Weighted average interest rate incurred 2.10%
Targa Resources Partners LP [Member] | Securitization Facility [Member]  
Debt Instrument [Line Items]  
Weighted average interest rate incurred 1.40%
Minimum [Member] | TRGP Revolver [Member]  
Debt Instrument [Line Items]  
Range of interest rates incurred 1.50%
Minimum [Member] | Targa Resources Partners LP [Member] | Securitization Facility [Member]  
Debt Instrument [Line Items]  
Range of interest rates incurred 1.10%
Maximum [Member] | TRGP Revolver [Member]  
Debt Instrument [Line Items]  
Range of interest rates incurred 3.10%
Maximum [Member] | Targa Resources Partners LP [Member] | Securitization Facility [Member]  
Debt Instrument [Line Items]  
Range of interest rates incurred 1.70%