text: We paid $116 million more in cash income taxes in 2013 than in 2012, 
  mainly because we used substantially all of our remaining non-capital 
  income tax loss carryforwards in 2012. In 2011, legislative changes 
  eliminated the deferral of partnership income, accelerating the payment 
  of approximately $700 million of previously deferred cash taxes over a 
  five year amortization period, beginning in 2012 at 15%, 20% in each 
  of 2013 through 2015, and 25% in 2016. Our cash tax payments for 
  the 2014 to 2016 taxation years will include these additional amounts. 
  
  Interest on long-term debt was higher in 2013, the net effect of an 
  increase in the amount of outstanding debt, partially offset by a decrease 
  in the weighted average interest rate on our outstanding debt, mainly 
  related to refinancing activities completed in 2013. See “Managing Our 
  Liquidity and Financial Resources” for more information. 
  
  While the elimination of the partnership deferral affects the timing of 
  cash tax payments, it does not impact our income tax expense for 
  accounting purposes. 
  
  The table below shows the difference between income tax expense 
  from continuing operations, and income tax expense computed by 
  applying the statutory income tax rate to income before income taxes: 
  
  In 2013, the foreign exchange loss of $23 million primarily relates to 
  the depreciation in the Canadian dollar relative to the US dollar and its 
  impact on our US$350 million of senior notes due 2038, which was not 
  hedged for accounting purposes prior to March 6, 2013. Most of the 
  foreign exchange loss was offset by the change in the fair value of the 
  associated Debt Derivatives as discussed below. We use cross currency 
  interest rate exchange agreements (Debt Derivatives) to hedge the 
  foreign exchange risk on all of our US$ denominated senior notes and 
  debentures. 