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Derivative Instruments and Hedging Activities - Notional Volumes Of The Partnership's Commodity Derivative Contracts (Details) - Targa Resources Partners LP [Member] | 12 Months Ended
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Dec. 31, 2020 MMBTU bbl
Swaps [Member] | Year 2021 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 169,516
Swaps [Member] | Year 2021 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 31,447
Swaps [Member] | Year 2022 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 100,856
Swaps [Member] | Year 2022 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 19,683
Swaps [Member] | Year 2023 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 42,176
Swaps [Member] | Year 2023 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 5,241
Swaps [Member] | Year 2024 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 0
Swaps [Member] | Year 2024 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 0
Swaps [Member] | Year 2025 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 0
Swaps [Member] | Year 2025 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 0
Basis Swaps [Member] | Year 2021 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 520,619
Basis Swaps [Member] | Year 2022 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 295,390
Basis Swaps [Member] | Year 2023 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 250,000
Basis Swaps [Member] | Year 2024 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 90,000
Basis Swaps [Member] | Year 2025 [Member] | Natural Gas [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU | 5,000
Future [Member] | Year 2021 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 20,959
Future [Member] | Year 2022 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 0
Future [Member] | Year 2023 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 0
Future [Member] | Year 2024 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 0
Future [Member] | Year 2025 [Member] | NGL [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 0
Options [Member] | Year 2021 [Member] | Condensate [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 5,040
Options [Member] | Year 2022 [Member] | Condensate [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 2,625
Options [Member] | Year 2023 [Member] | Condensate [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 889
Options [Member] | Year 2024 [Member] | Condensate [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 0
Options [Member] | Year 2025 [Member] | Condensate [Member] |
Derivative [Line Items] |
Notional volumes of commodity hedges (in Bbl per day) | 0

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