COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

Changes in AOCI attributable to our common shareholders for the years ended December 31, 2017, 2016 and 2015 are as follows:



	Cash Flow Hedges		Net Investment Hedges		Cumulative Translation Adjustment		Equity Investees		Pension and OPEB Adjustment		Total
(millions of Canadian dollars)
Balance at January 1, 2017	(746	)	(629	)	2,700		37		(304	)	1,058
Other comprehensive income/(loss) retained in AOCI	1		478		(2,623	)	(11	)	18		(2,137	)
Other comprehensive (income)/loss reclassified to earnings
Interest rate contracts¹	207		—		—		—		—		207
Commodity contracts²	(7	)	—		—		—		—		(7	)
Foreign exchange contracts³	(6	)	—		—		—		—		(6	)
Other contracts⁴	(6	)	—		—		—		—		(6	)
Amortization of pension and OPEB actuarial loss and prior service costs⁵	—		—		—		—		41		41
	189		478		(2,623	)	(11	)	59		(1,908	)
Tax impact
Income tax on amounts retained in AOCI	(16	)	12		—		(16	)	(10	)	(30	)
Income tax on amounts reclassified to earnings	(71	)	—		—		—		(22	)	(93	)
	(87	)	12		—		(16	)	(32	)	(123	)
Balance at December 31, 2017	(644	)	(139	)	77		10		(277	)	(973	)



	Cash Flow Hedges		Net Investment Hedges		Cumulative Translation Adjustment		Equity Investees		Pension and OPEB Adjustment		Total
(millions of Canadian dollars)
Balance at January 1, 2016	(688	)	(795	)	3,365		37		(287	)	1,632
Other comprehensive income/(loss) retained in AOCI	(216	)	171		(665	)	(5	)	(45	)	(760	)
Other comprehensive (income)/loss reclassified to earnings
Interest rate contracts¹	147		—		—		—		—		147
Commodity contracts²	(11	)	—		—		—		—		(11	)
Foreign exchange contracts³	1		—		—		—		—		1
Other contracts⁴	(18	)	—		—		—		—		(18	)
Amortization of pension and OPEB actuarial loss and prior service costs⁵	—		—		—		—		21		21
	(97	)	171		(665	)	(5	)	(24	)	(620	)
Tax impact
Income tax on amounts retained in AOCI	91		(5	)	—		5		11		102
Income tax on amounts reclassified to earnings	(52	)	—		—		—		(4	)	(56	)
	39		(5	)	—		5		7		46
Balance at December 31, 2016	(746	)	(629	)	2,700		37		(304	)	1,058



	Cash Flow Hedges		Net Investment Hedges		Cumulative Translation Adjustment	Equity Investees		Pension and OPEB Adjustment		Total
(millions of Canadian dollars)
Balance at January 1, 2015	(488	)	108		309	(5	)	(359	)	(435	)
Other comprehensive income/(loss) retained in AOCI	73		(952	)	3,056	47		65		2,289
Other comprehensive (income)/loss reclassified to earnings
Interest rate contracts¹	(34	)	—		—	—		—		(34	)
Commodity contracts²	(11	)	—		—	—		—		(11	)
Foreign exchange contracts³	7		—		—	—		—		7
Other contracts⁴	26		—		—	—		—		26
Amortization of pension and OPEB actuarial loss and prior service costs⁵	—		—		—	—		32		32
Other comprehensive income reclassified to earnings of derecognized cash flow hedges	(338	)	—		—	—		—		(338	)
	(277	)	(952	)	3,056	47		97		1,971
Tax impact
Income tax on amounts retained in AOCI	(29	)	49		—	(5	)	(14	)	1
Income tax on amounts reclassified to earnings	15		—		—	—		(11	)	4
Income tax on amounts reclassified to earnings of derecognized cash flow hedges	91		—		—	—		—		91
	77		49		—	(5	)	(25	)	96
Balance at December 31, 2015	(688	)	(795	)	3,365	37		(287	)	1,632


1	Reported within Interest expense in the Consolidated Statements of Earnings.


2	Reported within Commodity costs in the Consolidated Statements of Earnings.


3	Reported within Other income/(expense) in the Consolidated Statements of Earnings.


4	Reported within Operating and administrative expense in the Consolidated Statements of Earnings.


5	These components are included in the computation of net benefit costs and are reported within Operating and administrative expense in the Consolidated Statements of Earnings.