Segment and Geographic Area Information - Segment Information (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
Segment Reporting [Line Items]
Revenues from external customers	$ 4,143	$ 4,319	$ 4,504	$ 4,484	$ 4,278	$ 2,371	$ 2,533	$ 2,581	$ 17,450	$ 11,763	$ 9,274
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									43	18	(1)
Depreciation and amortization									(673)	(345)	(226)
Earnings (loss) before interest expense, income taxes, and noncontrolling interests	$ (144)	$ 148	$ 141	$ (24)	$ (23)	$ 112	$ 111	$ 122	121	322	413
Interest expense									(322)	(148)	(77)
Income tax (expense) benefit									(19)	(63)	(71)
Net income (loss)									(220)	111	265
Clean Air
Segment Reporting [Line Items]
Revenues from external customers									7,121	6,707	6,216
Powertrain
Segment Reporting [Line Items]
Revenues from external customers									4,408	1,112	0
Ride Performance
Segment Reporting [Line Items]
Revenues from external customers									2,754	2,164	1,807
Motorparts
Segment Reporting [Line Items]
Revenues from external customers									3,167	1,780	1,251
Intersegment revenues
Segment Reporting [Line Items]
Intersegment revenues									0	0	0
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									43	18	(1)
Reportable Segments
Segment Reporting [Line Items]
Revenues from external customers									17,450	11,763	9,274
EBITDA including noncontrolling interests									1,137	922	884
Reportable Segments | Clean Air
Segment Reporting [Line Items]
Revenues from external customers									7,121	6,707	6,216
EBITDA including noncontrolling interests									582	599	564
Reportable Segments | Powertrain
Segment Reporting [Line Items]
Revenues from external customers									4,408	1,112	0
EBITDA including noncontrolling interests									363	93	0
Reportable Segments | Ride Performance
Segment Reporting [Line Items]
Revenues from external customers									2,754	2,164	1,807
EBITDA including noncontrolling interests									8	69	125
Reportable Segments | Motorparts
Segment Reporting [Line Items]
Revenues from external customers									3,167	1,780	1,251
EBITDA including noncontrolling interests									184	161	195
Reportable Segments | Intersegment revenues
Segment Reporting [Line Items]
Intersegment revenues									358	114	22
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									43	18	0
Reportable Segments | Intersegment revenues | Clean Air
Segment Reporting [Line Items]
Intersegment revenues									0	0	0
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									0	0	0
Reportable Segments | Intersegment revenues | Powertrain
Segment Reporting [Line Items]
Intersegment revenues									160	40	0
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									32	14	0
Reportable Segments | Intersegment revenues | Ride Performance
Segment Reporting [Line Items]
Intersegment revenues									158	64	22
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									4	0	0
Reportable Segments | Intersegment revenues | Motorparts
Segment Reporting [Line Items]
Intersegment revenues									40	10	0
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									7	4	0
Corporate
Segment Reporting [Line Items]
Revenues from external customers									0	0	0
EBITDA including noncontrolling interests									(343)	(255)	(245)
Corporate | Intersegment revenues
Segment Reporting [Line Items]
Intersegment revenues									0	0	0
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									0	0	(1)
Reclass & Elims
Segment Reporting [Line Items]
Revenues from external customers									(1,984)	(1,331)	(1,180)
Equity in earnings (losses) of nonconsolidated affiliates, net of tax									0	0	0
Depreciation and amortization									0	0	0
Earnings (loss) before interest expense, income taxes, and noncontrolling interests									0	(18)	(53)
Interest expense									0	0	0
Income tax (expense) benefit									0	0	0
Net income (loss)									(169)	(337)	(467)
Reclass & Elims | Intersegment revenues
Segment Reporting [Line Items]
Intersegment revenues									$ (358)	$ (114)	$ (22)