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Business Segments - Summary of Operating Results by Reportable Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Revenue:        
Total revenue $ 606 $ 588 $ 1,802 $ 1,766
Operating profit (loss):        
Total operating profit (loss) 23 37 84 108
United States [Member]        
Revenue:        
Total revenue 482 448 1,429 1,331
Operating profit (loss):        
Total operating profit (loss) 25 29 76 81
Canada [Member]        
Revenue:        
Total revenue 3 6 8 17
Operating profit (loss):        
Total operating profit (loss) 65 68 187 217
International [Member]        
Revenue:        
Total revenue 59 72 186 218
Operating profit (loss):        
Total operating profit (loss) $ (5) $ 2 $ 0 $ 10