text: At December 31, 2013, all of our outstanding long-term debt was at 
  fixed interest rates and all of our US dollar-denominated long-term debt 
  was hedged against fluctuations in foreign exchange rates using Debt 
  Derivatives. As a result, with respect to the long-term debt and Debt 
  Derivatives, a one cent change in the Canadian dollar relative to the US 
  dollar would have no effect on net income. 
  
  short  selling with respect 
  
  At December 31, 2013, a $1 change in the market price per share of 
  our publicly traded investments would have resulted in a $14 million 
  change in our other comprehensive income, net of income taxes of 
  $2 million. 
  
  A one cent change in the Canadian dollar relative to the US dollar 
  would have resulted in no impact to net income and a $7 million 
  change, net of income taxes of $2 million, in other comprehensive 
  income for 
  the year ended December 31, 2013 related to our 
  Expenditure Derivatives. 
  
  *Stock-Based Compensation*
  Our liability related to stock-based compensation is marked-to-market 
  each period. Stock-based compensation expense is affected by the 
  change in the price of our Class B Non-Voting shares during the life of 
  an award, including SARs, RSUs and DSUs. We use Equity Derivatives 
  from time to time to manage our exposure in our stock-based 
  compensation expense. 