Debt Obligations - Summary Of Debt Obligations (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)
Revolving Credit Facility [Member] | TRC Senior Secured Revolving Credit Facility due February 2020 [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 29, 2020
Maximum borrowing capacity	$ 670,000,000
Remaining borrowing capacity	$ 395,000,000
Secured Debt [Member] | TRC Senior Secured Term Loan due February 2022 [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 28, 2022
Senior Unsecured Notes [Member] | Targa Pipeline Partners LP [Member] | Senior Unsecured 6 5/8% Notes due October 2020 [Member]
Debt Instrument [Line Items]
Maturity date	Oct. 01, 2020
Interest rate on fixed rate debt	6.625%
Senior Unsecured Notes [Member] | Targa Pipeline Partners LP [Member] | Senior Unsecured 4 3/4% Notes due November 2021 [Member]
Debt Instrument [Line Items]
Maturity date	Nov. 15, 2021
Interest rate on fixed rate debt	4.75%
Senior Unsecured Notes [Member] | Targa Pipeline Partners LP [Member] | Senior Unsecured 5 7/8% Notes due August 2023 [Member]
Debt Instrument [Line Items]
Maturity date	Aug. 01, 2023
Interest rate on fixed rate debt	5.875%
Targa Resources Partners LP [Member] | Accounts Receivable Securitization Facility [Member] | Accounts Receivable Securitization Facility Due December 2017 [Member]
Debt Instrument [Line Items]
Maturity date	Dec. 31, 2017
Targa Resources Partners LP [Member] | Revolving Credit Facility [Member] | TRP Senior Secured Revolving Credit Facility due October 2020 [Member]
Debt Instrument [Line Items]
Maturity date	Oct. 31, 2020
Maximum borrowing capacity	$ 1,600,000
Remaining borrowing capacity	$ 1,436,800,000
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5% Notes due January 2018 [Member]
Debt Instrument [Line Items]
Maturity date	Jan. 15, 2018
Interest rate on fixed rate debt	5.00%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 4 1/8% notes due November 2019 [Member]
Debt Instrument [Line Items]
Maturity date	Nov. 15, 2019
Interest rate on fixed rate debt	4.125%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 6 5/8% Notes due October 2020 [Member]
Debt Instrument [Line Items]
Maturity date	Oct. 01, 2020
Interest rate on fixed rate debt	6.625%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 6 7/8% Notes due February 2021 [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 01, 2021
Interest rate on fixed rate debt	6.875%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 6 3/8% Notes due August 2022 [Member]
Debt Instrument [Line Items]
Maturity date	Aug. 01, 2022
Interest rate on fixed rate debt	6.375%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5 1/4% Notes due May 2023 [Member]
Debt Instrument [Line Items]
Maturity date	May 01, 2023
Interest rate on fixed rate debt	5.25%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 4 1/4% Notes due November 2023 [Member]
Debt Instrument [Line Items]
Maturity date	Nov. 15, 2023
Interest rate on fixed rate debt	4.25%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 6 3/4% Notes due March 2024 [Member]
Debt Instrument [Line Items]
Maturity date	Mar. 15, 2024
Interest rate on fixed rate debt	6.75%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5 1/8% Notes due February 2025 [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 28, 2025
Interest rate on fixed rate debt	5.125%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5 3/8% Notes due February 2027 [Member]
Debt Instrument [Line Items]
Maturity date	Feb. 28, 2027
Interest rate on fixed rate debt	5.375%