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Business Segments - Summary of Operating Results by Reportable Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Revenue:        
Total revenue $ 633 $ 594 $ 1,196 $ 1,178
Operating profit (loss):        
Total operating profit (loss) 33 36 61 71
United States [Member]        
Revenue:        
Total revenue 512 456 947 883
Operating profit (loss):        
Total operating profit (loss) 28 29 51 52
Canada [Member]        
Revenue:        
Total revenue 56 66 122 149
Operating profit (loss):        
Total operating profit (loss) 2 3 5 11
International [Member]        
Revenue:        
Total revenue 65 72 127 146
Operating profit (loss):        
Total operating profit (loss) $ 3 $ 4 $ 5 $ 8