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accounting policy developments - Impacts of application of IFRS 15, Consolidated statement of cash flows (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
OPERATING ACTIVITIES |  |
Net income | $ 1,624 | $ 1,578
Adjustments to reconcile net income to cash provided by operating activities: |  |
Depreciation and amortization | 2,267 | 2,169
Deferred income taxes | 74 | 467
Share-based compensation expense, net | 6 | 17
Net employee defined benefit plans expense | 95 | 82
Employer contributions to employee defined benefit plans | (53) | (67)
Non-current contract assets | (62) | (44)
Income from equity accounted investments | (170) | (4)
Shares settled from Treasury | 100 |
Other | (79) | (32)
Net change in non-cash operating working capital | 256 | (219)
Cash provided by operating activities | 4,058 | 3,947
Change arising from designation of financial assets as being accounted for at fair value through net income |  | 1
Change arising from designation of financial assets as being accounted for at fair value through other comprehensive income |  | (1)
Excluding effects of IFRS 15 |  |
OPERATING ACTIVITIES |  |
Net income | 1,476 | 1,480
Adjustments to reconcile net income to cash provided by operating activities: |  |
Depreciation and amortization | 2,267 | 2,169
Deferred income taxes | 19 | 430
Share-based compensation expense, net | 6 | 17
Net employee defined benefit plans expense | 95 | 82
Employer contributions to employee defined benefit plans | (53) | (67)
Income from equity accounted investments | (170) | (4)
Shares settled from Treasury | 100 |
Other | (76) | (18)
Net change in non-cash operating working capital | 394 | (142)
Cash provided by operating activities | 4,058 | 3,947
IFRS 15 effects |  |
OPERATING ACTIVITIES |  |
Net income | 148 | 98
Adjustments to reconcile net income to cash provided by operating activities: |  |
Deferred income taxes | 55 | 37
Non-current contract assets | (62) | (44)
Other | (3) | (14)
Net change in non-cash operating working capital | $ (138) | $ (77)

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