v3.26.3
Changes in Accumulated Other Comprehensive Loss by Component - Schedule of Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
(Loss) earnings before income taxes $ (42) $ (13) $ (245) $ (129)
Tax benefit (expense) 10 (302) (11) (256)
Net loss (32) (315) (256) (385)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Net derivative (losses) gains on cash flow hedges        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
(Loss) earnings before income taxes (7) (2) 1 (14)
Tax benefit (expense) 2 0 0 3
Net loss (5) (2) 1 (11)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Net derivative (losses) gains on cash flow hedges | Natural Gas Swap Contracts        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Cost of Sales [1]     1 2
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Net derivative (losses) gains on cash flow hedges | Currency Options and Forwards        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Cost of Sales [1] $ (7) $ (2) 0 (16)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Other Post-Retirement Benefit Plans | Accumulated Defined Benefit Plans Adjustment        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amortization of net actuarial gain [2]     1 1
(Loss) earnings before income taxes     1 1
Net loss     1 1
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Pension Plans | Accumulated Defined Benefit Plans Adjustment        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amortization of net actuarial gain [2]       (1)
Settlement loss [2]     (7)  
(Loss) earnings before income taxes     (7) (1)
Tax benefit (expense)     1 $ 1
Net loss     $ (6)  
[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).