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Income from operations - Employees by category (Detail)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Production [Member]      
Income from operations [Line Items]      
Average number of employees 35,281 39,742 38,618
Research & development [Member]      
Income from operations [Line Items]      
Average number of employees 10,833 11,690 10,751
Other [Member]      
Income from operations [Line Items]      
Average number of employees 23,001 23,019 22,543
Employees [Member]      
Income from operations [Line Items]      
Average number of employees 69,115 74,451 71,912
Third party workers [Member]      
Income from operations [Line Items]      
Average number of employees 3,149 4,086 4,533
Aggregate continuing and discontinued operations [member]      
Income from operations [Line Items]      
Average number of employees 72,264 78,538 76,445