Changes in Accumulated Other Comprehensive Income AOCI Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Adjustment for Long-term Intercompany Transactions, Net of Tax	$ 2	$ (3)
Income Tax Expense (Benefit)	20	8
Net (loss) income	(54)	19
Net income attributable to noncontrolling interest	(3)	(3)
Net (loss) income attributable to Delphi Technologies	(57)	16
Amount Reclassified from Accumulated Other Comprehensive Income | Pension and postretirement plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial losses	(2)	(4)
Curtailment	0	(15)
Income before income taxes	(2)	(19)
Income Tax Expense (Benefit)	0	(4)
Net (loss) income	(2)	(15)
Net income attributable to noncontrolling interest	0	0
Net (loss) income attributable to Delphi Technologies	$ (2)	$ (15)