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Changes in Accounting Policies - Summary of Change in Presentation Currency Resulted in Impact on the Year Ended, Consolidated Statements of Cash Flows (Details)
$ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
CAD ($)
Statement Of Cash Flows Line Items      
Cash provided by (used in) Operating activities $ 324 $ 206  
Cash provided by (used in) Investing activities (59) (119)  
Cash provided by (used in) Financing activities $ (263) (149)  
Previously Reported [Member]      
Statement Of Cash Flows Line Items      
Cash provided by (used in) Operating activities     $ 273
Cash provided by (used in) Investing activities     (159)
Cash provided by (used in) Financing activities     $ (200)
Presentation Currency Change [Member]      
Statement Of Cash Flows Line Items      
Cash provided by (used in) Operating activities   (67)  
Cash provided by (used in) Investing activities   40  
Cash provided by (used in) Financing activities   $ 51