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Investments in Unconsolidated Affiliates, Descriptions (Details) | 12 Months Ended
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Dec. 31, 2017
NGL Pipelines & Services [Member] | Venice Energy Service Company, L.L.C. [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | VESCO owns a natural gas processing facility in south Louisiana and a related gathering system that gathers natural gas from certain offshore developments for delivery to its natural gas processing facility.
NGL Pipelines & Services [Member] | K/D/S Promix, L.L.C. [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Promix owns an NGL fractionation facility located in south Louisiana. The facility receives mixed NGLs via pipeline from natural gas processing plants located in southern Louisiana and along the Mississippi Gulf Coast. In addition, Promix owns an NGL gathering system that gathers mixed NGLs from processing plants in southern Louisiana for its fractionator.
NGL Pipelines & Services [Member] | Baton Rouge Fractionators LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | BRF owns an NGL fractionation facility located in south Louisiana that receives mixed NGLs from natural gas processing plants located in Alabama, Mississippi and southern Louisiana. In addition, BRF leases an NGL storage cavern.
NGL Pipelines & Services [Member] | Skelly-Belvieu Pipeline Company, L.L.C. [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Skelly-Belvieu owns a pipeline that transports mixed NGLs from Skellytown, Texas to Mont Belvieu, Texas. The Skelly-Belvieu Pipeline receives NGLs through a pipeline interconnect with our Mid-America Pipeline System in Skellytown.
NGL Pipelines & Services [Member] | Texas Express Pipeline LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Texas Express owns an NGL pipeline that extends from Skellytown to our NGL fractionation and storage complex in Mont Belvieu. Mixed NGLs from the Rocky Mountains, Permian Basin and Mid-Continent regions are delivered to the Texas Express Pipeline via an interconnect with our Mid-America Pipeline System near Skellytown. The pipeline also transports mixed NGLs from two gathering systems owned by TEG to Mont Belvieu. In addition, mixed NGLs from the Denver-Julesburg Basin in Colorado are transported to the Texas Express Pipeline using the Front Range Pipeline.
NGL Pipelines & Services [Member] | Texas Express Gathering LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | TEG owns two NGL gathering systems that deliver mixed NGLs to the Texas Express Pipeline. The Elk City gathering system gathers mixed NGLs from natural gas processing plants in the Anadarko/Granite Wash production area located in the Texas Panhandle and western Oklahoma. The North Texas gathering system gathers mixed NGLs from natural gas processing plants in the Barnett Shale production area in North Texas. An affiliate of Enbridge Energy Partners, L.P. serves as operator of these two NGL gathering systems.
NGL Pipelines & Services [Member] | Front Range Pipeline LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Front Range owns an NGL pipeline that transports mixed NGLs from natural gas processing plants located in the Denver-Julesburg Basin to an interconnect with our Texas Express Pipeline and Mid-America Pipeline System and other third party facilities in Skellytown.
NGL Pipelines & Services [Member] | Delaware Basin Gas Processing LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Delaware Processing, which commenced operations in August 2016, was formed with Occidental Petroleum Corporation to plan, design and construct a new 150 million cubic feet per day (“MMcf/d”) cryogenic natural gas processing plant to accommodate the growing production of NGL-rich natural gas in the Delaware Basin, in West Texas and southern New Mexico. The facility, located in Reeves County, Texas, is supported by long-term, firm contracts. We served as construction manager for the project and serve as operator of the new facility.
Crude Oil Pipelines & Services [Member] | Seaway Crude Pipeline Company LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Seaway owns a pipeline system that connects the Cushing, Oklahoma crude oil hub with markets in Southeast Texas. The Seaway Pipeline is comprised of the Longhaul System, the Freeport System and the Texas City System. The Cushing hub is a major industry trading hub and price settlement point for West Texas Intermediate on the NYMEX. The Longhaul System, which consists of two pipelines, provides north-to-south transportation of crude oil from the Cushing hub to Seaway’s Jones Creek terminal near Freeport, Texas and a terminal that we own located near Katy, Texas. The second of these two pipelines is referred to as the “Seaway Loop.” The Freeport System consists of a marine import and export dock, three pipelines and other related facilities that transport crude oil to and from Freeport and the Jones Creek terminal. The Texas City System consists of a marine import and export dock, storage tanks, various pipelines and other related facilities that transport crude oil to refineries in the Texas City, Texas area and to and from terminals in the Galena Park area, our Enterprise Crude Houston (“ECHO”) terminal and locations along the Houston Ship Channel. The Texas City System also receives production from certain offshore Gulf of Mexico developments.
Crude Oil Pipelines & Services [Member] | Eagle Ford Pipeline LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Eagle Ford Crude Oil Pipeline owns a crude oil pipeline that transports crude oil and condensate for producers in South Texas. The system consists of a crude oil and condensate pipeline system originating in Gardendale, Texas in LaSalle County to Three Rivers, Texas in Live Oak County and extending to Corpus Christi, Texas. The system also includes a pipeline segment that interconnects with our South Texas Crude Oil Pipeline System in Wilson County. This system includes a marine terminal facility in Corpus Christi and storage capacity across the system.
Crude Oil Pipelines & Services [Member] | Eagle Ford Terminals Corpus Christi LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Eagle Ford Corpus Christi is a joint venture formed in March 2015 to construct and operate a new deep-water marine crude oil terminal that is designed to handle a variety of ocean-going vessels. The new terminal is expected to be placed into service during the third quarter of 2018.
Natural Gas Pipelines & Services [Member] | White River Hub, LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | White River Hub owns a natural gas hub facility serving producers in the Piceance Basin of northwest Colorado. The facility enables producers to access six interstate natural gas pipelines.
Petrochemical & Refined Products Services [Member] | Baton Rouge Propylene Concentrator, LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | BRPC owns a propylene fractionation facility located in south Louisiana that fractionates refinery grade propylene into chemical grade propylene.
Petrochemical & Refined Products Services [Member] | Centennial Pipeline LLC [Member] |
Schedule of Equity Method Investments [Line Items] |
Equity Method Investment, Description of Principal Activities | Centennial owns an interstate refined products pipeline that extends from Beaumont, Texas, to Bourbon, Illinois. Centennial also owns a refined products storage terminal located near Creal Springs, Illinois.

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