SEGMENT REPORTING Sales and Operating Data (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 1,056	$ 1,033	$ 1,121	$ 1,151	$ 1,171	$ 1,159	$ 1,232	$ 1,296	$ 4,361	$ 4,858	$ 4,849
Depreciation and amortization (2)									238	197	201
Adjusted operating income									314	548	637
Operating income	(15)	45	56	55	93	81	122	138	141	434	446
Equity income, net of tax									4	7	5
Net income attributable to noncontrolling interest	$ 6	$ 3	$ 4	$ 3	$ 7	$ 4	$ 4	$ 7	16	22	34
Capital expenditures									371	265	197
Asset impairments									35	1	12
Restructuring (Note 10)									80	35	98
Delphi Technologies FIS Segment [Member]
Segment Reporting Information [Line Items]
Restructuring (Note 10)									32	29	79
Delphi Technologies PTP Segment [Member]
Segment Reporting Information [Line Items]
Restructuring (Note 10)									17	6	8
Powertrain Systems Segment
Segment Reporting Information [Line Items]
Restructuring (Note 10)									25	0	5
Delphi Technologies Aftermarket Segment [Member]
Segment Reporting Information [Line Items]
Restructuring (Note 10)									2	(2)	6
Operating segments
Segment Reporting Information [Line Items]
Asset impairments									23		12
Operating segments | Delphi Technologies FIS Segment [Member]
Segment Reporting Information [Line Items]
Net sales									1,748	1,856	1,773
Depreciation and amortization (2)									130	115	108
Adjusted operating income									99	186	212
Operating income									47	154	127
Equity income, net of tax									4	7	5
Net income attributable to noncontrolling interest									0	0	0
Capital expenditures									192	126	115
Asset impairments									13	0	6
Restructuring (Note 10)									32	29	79
Operating segments | Delphi Technologies PTP Segment [Member]
Segment Reporting Information [Line Items]
Net sales									1,231	1,361	1,398
Depreciation and amortization (2)									61	44	50
Adjusted operating income									204	256	261
Operating income									171	248	246
Equity income, net of tax									0	0	0
Net income attributable to noncontrolling interest									16	21	34
Capital expenditures									54	30	27
Asset impairments									15	1	6
Restructuring (Note 10)									17	6	8
Operating segments | Powertrain Systems Segment
Segment Reporting Information [Line Items]
Net sales									834	1,087	1,077
Depreciation and amortization (2)									41	33	36
Adjusted operating income									44	126	175
Operating income									1	120	169
Equity income, net of tax									0	0	0
Net income attributable to noncontrolling interest									0	0	0
Capital expenditures									112	85	47
Asset impairments									2	0	0
Restructuring (Note 10)									25	0	5
Operating segments | Delphi Technologies Aftermarket Segment [Member]
Segment Reporting Information [Line Items]
Net sales									841	874	947
Depreciation and amortization (2)									6	5	7
Adjusted operating income									86	97	94
Operating income									81	94	88
Equity income, net of tax									0	0	0
Net income attributable to noncontrolling interest									0	1	0
Capital expenditures									4	5	3
Asset impairments									1	0	0
Restructuring (Note 10)									2	2	6
Eliminations and other
Segment Reporting Information [Line Items]
Net sales									(293)	(320)	(346)
Depreciation and amortization (2)									0	0	0
Adjusted operating income									(119)	(117)	(105)	$ (105)
Operating income									(159)	(182)	(184)	(184)
Equity income, net of tax									0	0
Net income attributable to noncontrolling interest									0	0	0
Capital expenditures									9	19	$ 5
Asset impairments									4	0		0
Restructuring (Note 10)									$ 4	$ 2		$ 0