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Consolidated statement of comprehensive income - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net income (loss)	$ 392	$ (188)
Other comprehensive income (loss), net of income taxes
Postretirement benefits liability adjustment (excluding amortization)	54	(114)
Amortization of postretirement benefits liability adjustment included in net periodic benefit costs	33	34
Total other comprehensive income (loss)	87	(80)
Comprehensive income (loss)	$ 479	$ (268)

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