According to new research from The Motley Fool, Enbridge (ENB -0.81%), one of the biggest pipeline operators in the world, is now also one of the largest publicly traded energy companies. Its market cap recently surpassed $100 billion. For years, investors have relied on the company for its juicy dividend, which now delivers a yield of nearly 6%.Enbridge has been a terrific long-term investment throughout its history. But is it still a buy today? You might be surprised by the answer.Enbridge has amazing com ...