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Pre-Production Costs Related to Long-Term Supply Agreements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Pre-production E&D costs for which reimbursement is contractually guaranteed by the customer	$ 58.8	$ 33.5
Pre-production tooling costs related to customer-owned tools for which reimbursement is contractually guaranteed by the customer	47.0	31.8
Cash collected related to E&D and tooling costs	$ 95.8	$ 79.0

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- Definition

Amount of recoverable preproduction engineering and design costs related to long term supply agreements capitalized during the reporting period.

+ References

No definition available.

+ Details

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X

- Definition

Amount of recoverable preproduction tooling costs related to long term supply agreements capitalized during the reporting period.

+ References

No definition available.

+ Details

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X

- Definition

Cash recoveries of preproduction engineering, design and tooling costs incurred on behalf of a customer.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- References

No definition available.

+ Details

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