Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Details)

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Significant Accounting Policies - Additional Information (Details) - Employed
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Significant Accounting Policies [Line Items]      
IRAP tax on tax base rate 3.90% 3.90%  
Average number of employees 4,461 4,044 3,825
Bottom of Range      
Significant Accounting Policies [Line Items]      
Normal credit term upon delivery 60 days    
Average number of employees 50    
Bottom of Range | Industrial Patents and Intellectual Property Rights and Licenses      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets other than goodwill 3 years    
Bottom of Range | Capitalized Development Cost      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets other than goodwill 3 years    
Bottom of Range | Other Intangible Assets      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets other than goodwill 3 years    
Top of Range      
Significant Accounting Policies [Line Items]      
Normal credit term upon delivery 90 days    
Top of Range | Industrial Patents and Intellectual Property Rights and Licenses      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets other than goodwill 5 years    
Top of Range | Capitalized Development Cost      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets other than goodwill 5 years    
Top of Range | Other Intangible Assets      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets other than goodwill 5 years