Discontinued Operations, Divestitures, and Assets Held for Sale - Narrative (Details) $ in Thousands, ft³ in Billions			3 Months Ended	12 Months Ended
	Aug. 12, 2019 USD ($)	Jul. 31, 2018 USD ($) mi	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 28, 2019 USD ($) ft³
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses					$ 1,002	$ 8,341
Gain (loss) from divestiture					$ (1,022)	$ 822
East Texas Pipeline | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of assets	$ 17,500
Gain on disposition	$ 16,154
Natural Gas Storage Assets | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of assets							$ 210,067
Gain on disposition				$ 178,781
Natural gas storage (in cubic feet) | ft³							50
WTLPG | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage		20.00%
Length common carrier pipeline (in miles) | mi		2,300
Proceeds from sale of equity method investments		$ 193,705
Terminalling and storage | Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of long-lived assets			$ 600
Transportation revenue | Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of long-lived assets			$ 1,625