Changes in Accumulated Other Comprehensive Income AOCI Reclassifications (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		$ 4,058	$ 3,589
Income tax expense		(34)	(21)
Net income		164	90
Net income attributable to noncontrolling interest		(3)	(1)
Net income attributable to Aptiv		162	89
Amount Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to Aptiv		8	11
Amount Reclassified from Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes		9	11
Income tax expense		0	0
Net income		9	11
Net income attributable to noncontrolling interest		0	0
Net income attributable to Aptiv		9	11
Amount Reclassified from Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Commodity derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		3	11
Amount Reclassified from Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Foreign currency derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		12	0
Amount Reclassified from Accumulated Other Comprehensive Income | Pension and postretirement plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial losses	[1]	(1)	(2)
Income before income taxes		(1)	(2)
Income tax expense		0	2
Net income		(1)	0
Net income attributable to noncontrolling interest		0	0
Net income attributable to Aptiv		$ (1)	$ 0

[1] These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 9. Pension Benefits for additional details).