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Consolidated statement of comprehensive income - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Net income (loss) | $ 2,200 | $ 2,314 | $ 490
Other comprehensive income (loss), net of income taxes |  |  |
Postretirement benefits liability adjustment (excluding amortization) | (505) | 158 | (54)
Amortization of postretirement benefits liability adjustment included in net periodic benefit costs | 111 | 140 | 136
Total other comprehensive income (loss) | (394) | 298 | 82
Comprehensive income (loss) | $ 1,806 | $ 2,612 | $ 572

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