One of the worlds largest energy companies is Royal Dutch Shell
It has massive borrowings to fund its operations.
http://www.shell.com/investors/financial-reporting/bonds-and-credit-ratings.html
Total outstanding debt is:-
CHF 1,325 Million
EURO 13,450 Million
GB £ 500 Million
US$ 40,500 Million
Total in Sterling is £39,845 Million. That is £39.8 Billion.
What is interesting is to see when the debts are due to be repaid, the maturity profile.