Segment Information - Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting [Line Items]
Net sales and operating revenues	$ 4,731	$ 3,836
Equity in earnings of nonconsolidated affiliates, net of tax	22	13
Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	4,731	3,836
Equity in earnings of nonconsolidated affiliates, net of tax	22	13
Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues	719	706
Motorparts | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	719	706
Equity in earnings of nonconsolidated affiliates, net of tax	3	2
Performance Solutions
Segment Reporting [Line Items]
Net sales and operating revenues	787	669
Performance Solutions | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	787	669
Equity in earnings of nonconsolidated affiliates, net of tax	1	0
Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues	2,124	1,545
Clean Air | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	2,124	1,545
Equity in earnings of nonconsolidated affiliates, net of tax	0	0
Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues	1,101	916
Powertrain | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	1,101	916
Equity in earnings of nonconsolidated affiliates, net of tax	18	11
Intersegment Revenues
Segment Reporting [Line Items]
Net sales and operating revenues	0	0
Intersegment Revenues | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(88)	(82)
Intersegment Revenues | Reclass & Elims
Segment Reporting [Line Items]
Net sales and operating revenues	88	82
Intersegment Revenues | Motorparts | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(9)	(9)
Intersegment Revenues | Performance Solutions | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(26)	(29)
Intersegment Revenues | Clean Air | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(6)	(6)
Intersegment Revenues | Powertrain | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	$ (47)	$ (38)