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Segmented and Geographic Information
 12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Segmented and Geographical Information Operating segment
The Company operates in only one operating segment: rail transportation. Operating results by geographic areas, railway corridors or other lower-level components or units of operation are not reviewed by the Company’s chief operating decision-maker to make decisions about the allocation of resources to, or the assessment of performance of, such geographic areas, corridors, components or units of operation.

In the years ended December 31, 2018, 2017, and 2016, no one customer comprised more than 10% of total revenues and accounts receivable.

Geographic information
(in millions of Canadian dollars)
Canada

United States

Total

2018



Revenues
$
5,232

$
2,084

$
7,316

Long-term assets excluding financial instruments and pension assets
$
12,133

$
6,759

$
18,892

2017



Revenues(1)
$
4,667

$
1,887

$
6,554

Long-term assets excluding financial instruments and pension assets
$
11,505

$
5,947

$
17,452

2016



Revenues(1)
$
4,473

$
1,759

$
6,232

Long-term assets excluding financial instruments and pension assets
$
11,000

$
6,121

$
17,121


(1) Prior years amounts have not been adjusted under the modified retrospective method (Note 2).