.5 million revolving credit facility . the senior credit facility was terminated on january 11 , 2011 . any commercial paper outstanding was backed by the revolving credit facility . under our senior credit facility , we were required to maintain a consolidated net worth of at least $ 12.1 billion . effective january 11 , 2011 , we entered into a new $ 1.0 billion multi-currency revolving senior credit facility with various financial institutions