Divestitures - Additional Information (Details) $ in Billions	1 Months Ended
	Feb. 28, 2019 MBbls / d	Apr. 03, 2019 USD ($)
Subsequent Event [Member] | Badlands [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Subsidiary ownership interest sale percentage		45.00%
Consideration received on sale of interest on subsidiary | $		$ 1.6
Train 7 Joint Venture [Member] | Fractionation Related Infrastructure [Member] | Targa Resources Corp [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Option to purchase equity interest percentage	100.00%
Train 7 Joint Venture [Member] | Train 7 Or Train 8 [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Option to purchase equity interest percentage	20.00%
Fractionation train capacity | MBbls / d	110
Train 7 Joint Venture [Member] | Train 7 [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Option to purchase equity interest percentage	20.00%