Consolidated Statements Of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net sales	$ 1,232	$ 1,187	$ 2,528	$ 2,355
Operating expenses:
Cost of sales	991	947	2,037	1,873
Selling, general and administrative	105	91	202	171
Amortization	2	4	6	8
Restructuring	12	66	23	76
Total operating expenses	1,110	1,108	2,268	2,128
Operating income	122	79	260	227
Interest expense	(19)	0	(39)	(1)
Other income (expense), net	4	0	10	(6)
Income before income taxes and equity income	107	79	231	220
Income tax expense	(20)	(22)	(42)	(53)
Income before equity income	87	57	189	167
Equity income, net of tax	3	(1)	6	0
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
Net income per share attributable to Delphi Technologies:
Basic (in dollars per share)	$ 0.97	$ 0.54	$ 2.07	$ 1.70
Diluted (in dollars per share)	$ 0.97	$ 0.54	$ 2.07	$ 1.70
Weighted Average Number of Shares Outstanding [Abstract]
Basic (in shares)	88,780,000	88,610,000	88,750,000	88,610,000
Diluted (in shares)	89,050,000	88,610,000	88,980,000	88,610,000
Cash dividends declared per share	$ 0.17	$ 0	$ 0.34	$ 0.00