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Supplemental Guarantor Consolidating Financial Statements - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Nov. 30, 2014
Condensed Financial Statements, Captions [Line Items]        
Percentage owned, domestic subsidiaries 100.00%      
Selling, general and administrative expenses allocated from Lear $ 87,100,000 $ 77,200,000 $ 77,700,000  
Senior notes | 2023 Notes        
Condensed Financial Statements, Captions [Line Items]        
Long-term debt, aggregate principal amount $ 500,000,000      
Stated interest rate 4.75%      
Senior notes | 2024 Notes        
Condensed Financial Statements, Captions [Line Items]        
Long-term debt, aggregate principal amount $ 325,000,000      
Stated interest rate 5.375%      
Senior notes | 2025 Notes        
Condensed Financial Statements, Captions [Line Items]        
Long-term debt, aggregate principal amount $ 650,000,000      
Stated interest rate 5.25%     5.25%