Energy Transfer LP engages in natural gas pipeline transportation and transmission services. It operates through the following segments: Intrastate Transportation and Storage, Interstate Transportation and Storage, Midstream, NGL and Refined Products Transportation and Services, Crude Oil Transportation and Services, Investment in Sunoco LP, Investment in USAC, and All Other. The Intrastate Transportation and Storage segment owns and operates natural gas transportation pipelines. The Interstate Transportation and Storage segment includes transportation pipelines, storage facilities, and gathering systems and delivery of natural gas to industrial end-users and other pipelines. The Midstream segment consists of natural gas gathering, compression, treating, processing, storage, and transportation. The NGL and Refined Products Transportation segment engages in the operations transport, store and execute acquisition, and marketing activities utilizing a complementary network of pipelines, storage and blending facilities, and strategic off-take locations that provide access to multiple NGL markets. The Crude Oil Transportation and Services segment provides transportation, terminalling, acquisition, and marketing services to crude oil markets. The Investment in Sunoco LP segment refers to the distribution of motor fuels to independent dealers, distributors, and other commercial customers and the distribution of motor fuels to end-user customers at retail sites. The Investment in USAC segment offers compression services to its customers in connection with infrastructure applications including both allowing for the processing and transportation of natural gas through the domestic pipeline system and enhancing crude oil production through artificial lift processes. The company was founded by Kelcy L. Warren in 1996 and is headquartered in Dallas, TX.