Segment Information - Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting [Line Items]
Net sales and operating revenues	$ 4,583	$ 2,637	$ 9,314	$ 6,473
Equity in earnings of nonconsolidated affiliates, net of tax	15	4	37	17
Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	4,583	2,637	9,314	6,473
Equity in earnings of nonconsolidated affiliates, net of tax	15	4	37	17
Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues	794	559	1,513	1,265
Motorparts | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	794	559	1,513	1,265
Equity in earnings of nonconsolidated affiliates, net of tax	4	1	7	3
Performance Solutions
Segment Reporting [Line Items]
Net sales and operating revenues	715	378	1,502	1,047
Performance Solutions | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	715	378	1,502	1,047
Equity in earnings of nonconsolidated affiliates, net of tax	0	1	1	1
Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues	2,024	1,140	4,148	2,685
Clean Air | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	2,024	1,140	4,148	2,685
Equity in earnings of nonconsolidated affiliates, net of tax	0	0	0	0
Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues	1,050	560	2,151	1,476
Powertrain | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	1,050	560	2,151	1,476
Equity in earnings of nonconsolidated affiliates, net of tax	11	2	29	13
Intersegment Revenues
Segment Reporting [Line Items]
Net sales and operating revenues	0	0	0	0
Intersegment Revenues | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(84)	(51)	(172)	(133)
Intersegment Revenues | Reclass & Elims
Segment Reporting [Line Items]
Net sales and operating revenues	84	51	172	133
Intersegment Revenues | Motorparts | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(10)	(6)	(19)	(15)
Intersegment Revenues | Performance Solutions | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(23)	(21)	(49)	(50)
Intersegment Revenues | Clean Air | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(4)	(3)	(10)	(9)
Intersegment Revenues | Powertrain | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	$ (47)	$ (21)	$ (94)	$ (59)