Changes in Accumulated Other Comprehensive Loss by Component (Tables)

6 Months Ended

Jun. 30, 2026

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Loss by Component

The following table presents the changes in Accumulated other comprehensive (loss) income by component(1) for the six months ended June 30, 2026 and the year ended December 31, 2025:


		Net derivative (losses) gains on cash flow hedges				Pension items(2)				Post-retirement benefit items(2)				Foreign currency items				Total
		$				$				$				$				$
Balance at December 31, 2024			(28	)			(17	)			37				(106	)			(114	)
Currency options			4			N/A				N/A				N/A					4
Foreign exchange forward contracts			22			N/A				N/A				N/A					22
Net gain (loss)		N/A					30				(2	)		N/A					28
Foreign currency items		N/A				N/A				N/A					56				56
Other comprehensive income (loss) before reclassifications			26				30				(2	)			56				110
Amounts reclassified from Accumulated other comprehensive (loss) income			11				(2	)			2				—				11
Net current period other comprehensive income			37				28				—				56				121
Balance at December 31, 2025			9				11				37				(50	)			7
Foreign exchange forward contracts			(14	)		N/A				N/A				N/A					(14	)
Foreign currency items		N/A				N/A				N/A					(33	)			(33	)
Other comprehensive loss before reclassifications			(14	)			—				—				(33	)			(47	)
Amounts reclassified from Accumulated other comprehensive (loss) income			(6	)			6				(1	)			—				(1	)
Net current period other comprehensive (loss) income			(20	)			6				(1	)			(33	)			(48	)
Balance at June 30, 2026			(11	)			17				36				(83	)			(41	)

(1)

All amounts are after tax. Amounts in parentheses indicate losses.

(2)

The projected benefit obligation is actuarially determined on an annual basis as of December 31.

Schedule of Reclassifications Out of Accumulated Other Comprehensive Loss

The following tables present reclassifications out of Accumulated other comprehensive (loss) income:


Details about Accumulated other comprehensive (loss) income components		Amounts reclassified from Accumulated other comprehensive (loss) income
		For the three months ended
		June 30,				June 30,
		2026				2025
		$				$
Net derivative losses on cash flow hedge
Currency options and forwards (1)			(1	)			(2	)
Total before tax			(1	)			(2	)
Tax benefit			—				1
Net of tax			(1	)			(1	)

Amortization of defined benefit pension items
Settlement loss (2)			(7	)			—
Total before tax			(7	)			—
Tax benefit			1				—
Net of tax			(6	)			—

Amortization of other post-retirement benefit items
Amortization of net actuarial gain (2)			1				—
Total before tax			1				—
Tax expense			—				—
Net of tax			1				—


Details about Accumulated other comprehensive (loss) income components		Amounts reclassified from Accumulated other comprehensive (loss) income
		For the six months ended
		June 30,				June 30,
		2026				2025
		$				$
Net derivative gains (losses) on cash flow hedge
Natural gas swap contracts (1)			1				2
Currency options and forwards (1)			7				(14	)
Total before tax			8				(12	)
Tax (expense) benefit			(2	)			3
Net of tax			6				(9	)

Amortization of defined benefit pension items
Amortization of net actuarial loss (2)			—				(1	)
Settlement loss (2)			(7	)			—
Total before tax			(7	)			(1	)
Tax benefit			1				1
Net of tax			(6	)			—

Amortization of other post-retirement benefit items
Amortization of net actuarial gain (2)			1				1
Total before tax			1				1
Tax expense			—				—
Net of tax			1				1

(1)

These amounts are included in Cost of sales in the Consolidated Statements of Earnings (Loss) and Comprehensive Income (Loss).

(2)

These amounts are included in the computation of net periodic benefit cost (see Note 5 “Pension plans and other post-retirement benefit plans” for more details).