Other comprehensive income (loss) information

3 Months Ended

Mar. 31, 2018

Other comprehensive income (loss) information

12. Other comprehensive income (loss) information

Changes in accumulated other comprehensive income (loss):

millions of Canadian dollars	2018			2017
Balance at January 1		(1,815	)		(1,897	)
Postretirement benefits liability adjustment:
Current period change excluding amounts reclassified from accumulated other comprehensive income		(19	)		41
Amounts reclassified from accumulated other comprehensive income		34			36
Balance at March 31		(1,800	)		(1,820	)

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

	Three Months
	to March 31
millions of Canadian dollars	2018			2017
Amortization of postretirement benefits liability adjustment included in net periodic benefit cost (a)		(46	)		(49	)

(a) This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 6).

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

	Three Months
	to March 31
millions of Canadian dollars	2018			2017
Postretirement benefits liability adjustments:
Postretirement benefits liability adjustment (excluding amortization)		(7	)		16
Amortization of postretirement benefits liability adjustment included in net periodic benefit cost		12			13
Total		5			29