Enbridge Inc., together with its subsidiaries, operates as an energy infrastructure company. The company operates through four segments: Liquids Pipelines, Gas Transmission, Gas Distribution and Storage, and Renewable Power Generation. The Liquids Pipelines segment operates pipelines and related terminals to transport various grades of crude oil and other liquid hydrocarbons in Canada and the United States. This segment also provides physical commodity marketing and logistical services, and crude oil marketing services.