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Pre-Production Costs Related to Long-Term Supply Agreements (Tables)
 3 Months Ended
Apr. 04, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Classification of Recoverable Customer E&D and Tooling Costs Related to Long-term Supply Agreements
The classification of recoverable customer E&D and tooling costs related to long-term supply agreements is shown below (in millions):
 
April 4,
2020
 
December 31,
2019
Current
$
185.7

 
$
157.2

Long-term
118.9

 
113.8

Recoverable customer E&D and tooling
$
304.6

 
$
271.0