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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

As reflected in the table below, net sales to GM and VW, Aptiv’s two largest customers, totaled approximately 20%, 22% and 25% of our total net sales for the years ended December 31, 2018, 2017 and 2016, respectively.

	Percentage of Total Net Sales										Accounts and Other Receivables
	Year Ended December 31,										December 31, 2018				December 31, 2017
	2018			2017			2016
											(in millions)
GM (1)	11	%		13	%		16	%			$	169			$	204
VW	9	%		9	%		9	%			149				145

(1) Net sales to GM includes net sales to GM’s former European Opel business prior to its sale to PSA on August 1, 2017, after which date these sales are excluded from net sales to GM.

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- Definition

Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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