Changes in Accumulated Other Comprehensive Income AOCI Reclassifications (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		$ 4,336	$ 3,617	$ 8,394	$ 7,206
Income tax expense		(30)	(16)	(64)	(37)
Net income (loss)		246	(72)	410	18
Net income (loss) attributable to noncontrolling interest		(4)	27	(7)	26
Net income (loss) attributable to Aptiv		242	(45)	404	44
Amount Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss) attributable to Aptiv		30	11	38	22
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		27	12	36	23
Income tax expense		3	0	3	0
Net income (loss)		30	12	39	23
Net income (loss) attributable to noncontrolling interest		0	0	0	0
Net income (loss) attributable to Aptiv		30	12	39	23
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		9	9	(12)	20
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		36	3	48	3
Amount Reclassified from Accumulated Other Comprehensive Income | Pension and postretirement plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial losses	[1]	0	(2)	(1)	(4)
Income before income taxes		0	(2)	(1)	(4)
Income tax expense		0	1	0	3
Net income (loss)		0	(1)	(1)	(1)
Net income (loss) attributable to noncontrolling interest		0	0	0	0
Net income (loss) attributable to Aptiv		$ 0	$ (1)	$ (1)	$ (1)

[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).