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Other (Income) Expense, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Other Income and Expenses [Line Items]
Net foreign currency transaction gains (losses)	$ (1.6)	$ (2.3)	$ (2.4)	$ 3.3
Other Income And Expense | Lear FAWSN
Other Income and Expenses [Line Items]
Consolidation of affiliate, revaluation gain			$ 10.0

X

- Definition

In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

+ References

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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