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Segment Information - Additional Information (Detail)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 29, 2018
USD ($)
Sep. 29, 2018
USD ($)
Segment
Segment Reporting Information [Line Items]    
Number of operating segments | Segment   3
Intersegment Eliminations    
Segment Reporting Information [Line Items]    
Revenues | $ $ 4 $ 10