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Net Interest Expense
 12 Months Ended
Dec. 31, 2015
Banking and Thrift, Interest [Abstract]  
Net Interest Expense
Net interest expense
(in millions of Canadian dollars)
2015

2014

2013

Interest cost
$
409

$
301

$
296

Interest capitalized to Properties
(14
)
(15
)
(13
)
Interest expense
395

286

283

Interest income
(1
)
(4
)
(5
)
Net interest expense
$
394

$
282

$
278



Interest expense includes interest on capital leases of $11 million for the year ended December 31, 2015 (2014 – $12 million; 2013 – $19 million).