Other comprehensive income (loss) information (Tables)

12 Months Ended

Dec. 31, 2018

Changes in Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss):

millions of Canadian dollars	2018			2017			2016
Balance at January 1		(1,815	)		(1,897	)		(1,828	)
Postretirement benefits liability adjustment:
Current period change excluding amounts reclassified from accumulated other comprehensive income		158			(54	)		(210	)
Amounts reclassified from accumulated other comprehensive income		140			136			141
Balance at December 31		(1,517	)		(1,815	)		(1,897	)

Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) - Before-Tax Income (Expense)

millions of Canadian dollars	2018			2017			2016
Amortization of postretirement benefits liability adjustment included in net periodic benefit cost (a)		(185	)		(194	)		(184	)
(a)  This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 5).

Income Tax Expense (Credit) for Components of Other Comprehensive Income (Loss)

millions of Canadian dollars	2018		2017			2016
Postretirement benefits liability adjustments:
Postretirement benefits liability adjustment (excluding amortization)		59		(20	)		(77	)
Amortization of postretirement benefits liability adjustment included in net periodic benefit cost		45		58			43
Total		104		38			(34	)