Nature of Business and Basis of Presentation - Customers' Net Sales as a Percentage of Total Net Sales (Details) - Sales revenue, net - Customer concentration risk	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
General Motors Company
Product Information [Line Items]
Concentration risk (percentage)	16.00%	17.00%	16.00%	18.00%
Fiat Chrysler Automobiles
Product Information [Line Items]
Concentration risk (percentage)	11.00%	16.00%	15.00%	15.00%
Ford Motor Company
Product Information [Line Items]
Concentration risk (percentage)	12.00%	12.00%	14.00%	11.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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