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Segmented Information (Tables)
12 Months Ended
Dec. 31, 2017
Segmented information  
Information by geographic area, revenues
In millionsYear ended December 31, 201720162015
Revenues
Canada$8,794$7,971$8,283
U.S. 4,2474,0664,328
Total revenues$13,041$12,037$12,611
Information by geographic area, net income
In millionsYear ended December 31, 201720162015

Net income
Canada$2,857$2,708$2,469
U.S. 2,6279321,069
Total net income$5,484$3,640$3,538
Information by geographic area, properties
In millionsDecember 31,20172016
Properties
Canada$18,305$17,445
U.S. 15,88416,310
Total properties$34,189$33,755