Partnership Units and Related Matters - Summary of Distributions Declared or Paid by the Partnership (Details) - Distributions Paid [Member] - USD ($) $ in Millions |
3 Months Ended | |||
---|---|---|---|---|
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
|
Distributions Made To Members Or Limited Partners [Abstract] | ||||
Distributions payable date | Nov. 13, 2018 | Aug. 13, 2018 | May 11, 2018 | Feb. 12, 2018 |
Total Distributions | $ 237.6 | $ 234.0 | $ 229.7 | $ 228.5 |
Distributions to Targa Resources Corp. | $ 234.8 | $ 231.2 | $ 226.9 | $ 225.7 |