Debt Obligations - Range of Interest Rates and Weighted Average Interest Rate Incurred on Variable Rate Debt Obligations (Details)	Sep. 30, 2022
TRGP Revolver and Commercial Paper Program [Member]
Debt Instrument [Line Items]
Weighted average interest rate incurred	2.90%
Targa Resources Partners LP [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate incurred	4.10%
Targa Resources Partners LP [Member] | Securitization Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate incurred	2.00%
Minimum [Member] | TRGP Revolver and Commercial Paper Program [Member]
Debt Instrument [Line Items]
Range of interest rates incurred	1.50%
Minimum [Member] | Targa Resources Partners LP [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Range of interest rates incurred	4.10%
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 and Commercial Paper Program [Member]
Debt Instrument [Line Items]
Range of interest rates incurred	4.70%
Maximum [Member] | Targa Resources Partners LP [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Range of interest rates incurred	4.10%
Maximum [Member] | Targa Resources Partners LP [Member] | Securitization Facility [Member]
Debt Instrument [Line Items]
Range of interest rates incurred	3.80%