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Long-Term Debt - Summary of borrowings (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Jan. 01, 2023
Disclosure of detailed information about borrowings [line items]        
Notes $ 531   $ 561 $ 549
Long-term debt gross 754   993 1,113
Deferred transaction costs and Notes discount (46)   (74) (86)
Current portion of long-term debt 0   40 20 [1]
Non-current portion of long-term debt 708   879 1,007 [1]
Long-term debt $ 708   919 1,027
Senior Secured Notes Maturing on October 15, 2027 [Member]        
Disclosure of detailed information about borrowings [line items]        
Maturity Date October 15, 2027      
Notes $ 563   625 625
Secured Revolving Credit Facility [Member]        
Disclosure of detailed information about borrowings [line items]        
Maturity Date October 13, 2026      
Drawings on the RCF $ 191   238 338
Secured Term Loan Facility [Member]        
Disclosure of detailed information about borrowings [line items]        
Drawings on the Term Loan $ 0   $ 130 $ 150
Long-term debt   $ 120    
[1] Effective January 1, 2024, the Company changed its presentation currency from Canadian dollars to United States dollars. Refer to Note 4 “Changes in Accounting Policies” for further details.