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Warranty Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Accrual balance at beginning of year	$ 58	$ 65
Provision for estimated warranties incurred during the period	39	47
Changes in estimate for pre-existing warranties	5	45
Settlements made during the period (in cash or in kind)	(51)	(103)
Foreign currency translation and other	(1)	4
Accrual balance at end of year	50	58
Advanced Safety and User Experience
Product Warranty Liability [Line Items]
Specific Warranty Expense		$ 43
Minimum | Product Warranty
Product Warranty Liability [Line Items]
Range of Possible Loss, Portion Not Accrued	0
Maximum | Product Warranty
Product Warranty Liability [Line Items]
Range of Possible Loss, Portion Not Accrued	$ 15

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- Definition

Amount recorded to increase the product warranty accrual for specifically identified warranty matters, primarily due to settlements reached with customers. Includes changes in estimates attributable to preexisting product warranties.

+ References

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The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

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Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties.

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Amount of increase in the standard and extended product warranty accrual from warranties issued.

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Amount of foreign currency translation gain (loss) which decreases (increases) the standard and extended product warranty accrual.

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