Credit Risk (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Ford And Affiliates [Member]
Concentration Risk [Line Items]
Entity-wide revenue, major customer, percentage	22.00%	26.00%	28.00%
Ford And Affiliates [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Entity-wide revenue, major customer, percentage	12.00%	14.00%
Mazda [Member]
Concentration Risk [Line Items]
Entity-wide revenue, major customer, percentage	14.00%	18.00%	17.00%
Mazda [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Entity-wide revenue, major customer, percentage	5.00%	9.00%
Nissan\Renault [Member]
Concentration Risk [Line Items]
Entity-wide revenue, major customer, percentage	13.00%	12.00%	14.00%
Nissan\Renault [Member] | Accounts Receivable [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Entity-wide revenue, major customer, percentage	13.00%	11.00%