Changes in Accumulated other comprehensive income ("AOCI") by component (Tables)

3 Months Ended

Mar. 31, 2025

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Changes in Accumulated Other Comprehensive Income by Component

Changes in AOCI attributable to controlling shareholders, net of tax, by component are as follows:

	For the three months ended March 31
(in millions of Canadian dollars)	Foreign currency net of hedging activities		Derivatives		Pension and post- retirement defined benefit plans		Equity accounted investments		Total
Opening balance, January 1, 2025	$	3,413	$	10	$	(738)	$	(5)	$	2,680
Other comprehensive loss before reclassifications	(28)		—		—		—		(28)
Amounts reclassified from AOCI	—		—		1		—		1
Net other comprehensive (loss) income	(28)		—		1		—		(27)
Balance as at March 31, 2025	$	3,385	$	10	$	(737)	$	(5)	$	2,653
Opening balance, January 1, 2024	$	837	$	5	$	(1,463)	$	3	$	(618)
Other comprehensive income before reclassifications	685		—		—		—		685
Amounts reclassified from AOCI	—		1		9		—		10
Net other comprehensive income	685		1		9		—		695
Balance as at March 31, 2024	$	1,522	$	6	$	(1,454)	$	3	$	77