Other comprehensive income (loss) information

3 Months Ended

Mar. 31, 2021

Other comprehensive income (loss) information

10.    Other comprehensive income (loss) information

Changes in accumulated other comprehensive income (loss):

millions of Canadian dollars	2021			2020
Balance at January 1		(1,989	)		(1,911	)
Postretirement benefits liability adjustment:
Current period change excluding amounts reclassified from accumulated other comprehensive income		54			(114	)
Amounts reclassified from accumulated other comprehensive income		33			34
Balance at March 31		(1,902	)		(1,991	)

Amounts reclassified out of accumulated other comprehensive income (loss) - before tax income (expense):

	Three Months     to March 31
millions of Canadian dollars	2021		2020
Amortization of postretirement benefits liability adjustment included in net periodic benefit cost (a)		(44)		(45)

(a) This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 4).

Income tax expense (credit) for components of other comprehensive income (loss):

	Three Months     to March 31
millions of Canadian dollars	2021		2020
Postretirement benefits liability adjustments:
Postretirement benefits liability adjustment (excluding amortization)		17		(37	)
Amortization of postretirement benefits liability adjustment included in net periodic benefit cost		11		11
Total		28		(26	)