text: We haven’t touched our $2 billion in credit — and we don’t 
  intend to. We maintain our access to this credit by keeping our 
  debt-to-capital ratio lower than 60 percent. Our ratio at year 
  end was 46.7 percent, well within the compliance range in our 
  credit agreement. And as we execute on our plan to pay down 
  debt, that ratio will drop even further. 