Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

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 22%, 25% and 29% of our total net sales for the years ended December 31, 2017, 2016 and 2015, respectively.

	Percentage of Total Net Sales						Accounts and Other Receivables
	Year Ended December 31,						December 31, 2017		December 31, 2016
	2017		2016		2015
							(in millions)
GM (1)	13	%	16	%	19	%	$	204	$	291
VW	9	%	9	%	10	%	145		126

(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 included in net sales to PSA.