Changes in Accumulated Other Comprehensive Income AOCI Reclassifications (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Adjustment for Long-term Intercompany Transactions, Net of Tax		$ 12		$ 5
Cost of sales		(991)	$ (947)	(2,037)	$ (1,873)
Income tax expense		(20)	(22)	(42)	(53)
Net income		90	56	195	167
Net income attributable to noncontrolling interest		(4)	(8)	(11)	(16)
Net income attributable to Delphi Technologies		86	48	184	151
Amount Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to Delphi Technologies		(5)	(6)	(10)	(11)
Amount Reclassified from Accumulated Other Comprehensive Income | Pension and postretirement plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial losses	[1]	(6)	(7)	(12)	(13)
Income before income taxes		(6)	(7)	(12)	(13)
Income tax expense		1	1	2	2
Net income		(5)	(6)	(10)	(11)
Net income attributable to noncontrolling interest		0	0	0	0
Net income attributable to Delphi Technologies		$ (5)	$ (6)	$ (10)	$ (11)

[1] These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 10. Pension Benefits for additional details).