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CONSOLIDATED STATEMENTS OF CASH FLOWS - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Operating activities      
Net earnings (loss) $ 2,591 $ 2,397 $ (204)
Non-cash items      
Depletion, depreciation and amortization 5,161 5,186 4,858
Share-based compensation (146) 134 355
Asset retirement obligation accretion 186 164 142
Unrealized risk management (gain) loss (35) 37 25
Unrealized foreign exchange loss (gain) 706 (821) (93)
Realized foreign exchange loss on repayment of US dollar securities 146 0 0
Gain on acquisition, disposition and revaluation of properties (452) (379) (250)
Loss (gain) from investments 374 (11) (299)
Deferred income tax expense (recovery) 557 640 (241)
Other (23) (110) (32)
Abandonment expenditures (290) (274) (267)
Net change in non-cash working capital 1,346 299 (542)
Cash flows from operating activities 10,121 7,262 3,452
Financing activities      
(Repayment) issue of bank credit facilities and commercial paper, net (1,595) 2,222 342
Issue of medium-term notes, net 0 1,791 998
(Repayment) issue of US dollar debt securities, net (1,236) 2,733 (834)
Issue of common shares on exercise of stock options 332 466 559
Purchase of common shares under Normal Course Issuer Bid (1,282) 0 0
Dividends on common shares (1,562) (1,252) (758)
Cash flows (used in) from financing activities (5,343) 5,960 307
Investing activities      
Net (expenditures) proceeds on exploration and evaluation assets (266) (124) 6
Net expenditures on property, plant and equipment [1] (4,175) (4,574) (3,803)
Acquisition of AOSP and other assets, net of cash acquired [2] 0 (8,630) 0
Investment in other long-term assets (28) (87) (99)
Net change in non-cash working capital (345) 313 85
Cash flows used in investing activities (4,814) (13,102) (3,811)
(Decrease) increase in cash and cash equivalents (36) 120 (52)
Cash and cash equivalents – beginning of year 137 17 69
Cash and cash equivalents – end of year 101 137 17
Interest paid, net 911 725 617
Income taxes received $ (225) (792) (444)
Disposal of Cold Lake Pipeline | Investment in Inter Pipeline Ltd.      
Investing activities      
Non-cash share consideration received     $ 190
AOSP      
Investing activities      
Other working capital   291  
Fair value of share considerations issued   $ 3,818  
[1] Net expenditures on property, plant and equipment in 2016 exclude non-cash share consideration of $190 million received from Inter Pipeline Ltd. ("Inter Pipeline") on the disposition of the Company's interest in the Cold Lake Pipeline
[2] The acquisition of AOSP in 2017 includes net working capital of $291 million and excludes non-cash share consideration of $3,818 million. See note 8.