Segment Reporting Reconciliation of Sales and Operating Data (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net sales		$ 1,232	$ 1,187	$ 2,528	$ 2,355
Depreciation and amortization		48	49	98	97
Adjusted operating income		156	164	315	326
Operating income		122	79	260	227
Equity income, net of tax		3	(1)	6	0
Net income attributable to noncontrolling interest		4	8	11	16
Operating Segments | Powertrain Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales		1,086	1,035	2,239	2,058
Depreciation and amortization		47	48	96	94
Adjusted operating income		134	141	276	291
Operating income		105	61	228	203
Equity income, net of tax		3	(1)	6	0
Net income attributable to noncontrolling interest		4	8	11	16
Operating Segments | Delphi Technologies Aftermarket Segment [Member]
Segment Reporting Information [Line Items]
Net sales		215	232	432	454
Depreciation and amortization		1	1	2	3
Adjusted operating income		22	23	39	35
Operating income		17	18	32	24
Equity income, net of tax		0	0	0	0
Net income attributable to noncontrolling interest		0	0	0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	[1]	(69)	(80)	(143)	(157)
Depreciation and amortization	[1]	0	0	0	0
Adjusted operating income	[1]	0	0	0	0
Operating income	[1]	0	0	0	0
Equity income, net of tax	[1]	0	0	0	0
Net income attributable to noncontrolling interest	[1]	$ 0	$ 0	$ 0	$ 0

[1] Eliminations and Other includes the elimination of inter-segment transactions.