Fueling that outlook is its ability to grow its legacy operations' cash flows, which it expects will expand at a 6% to 9% annual rate, powered by inflation escalators in its existing contracts, volume growth, and organic expansion projects. With a top-notch balance sheet, backed by an investment-grade credit rating and reasonable dividend payout ratio, Brookfield has ample financial flexibility to continue expanding. Fueling that fast-paced growth has been Enbridge's ability to build and buy new energy-related infrastructure assets like oil and gas pipelines and renewable energy projects.