Segment Information - Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting [Line Items]
Net sales and operating revenues	$ 4,332	$ 4,256	$ 13,646	$ 10,729
Equity in earnings of nonconsolidated affiliates, net of tax	10	9	47	26
Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	4,332	4,256	13,646	10,729
Equity in earnings of nonconsolidated affiliates, net of tax	10	9	47	26
Motorparts
Segment Reporting [Line Items]
Net sales and operating revenues	769	730	2,282	1,995
Motorparts | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	769	730	2,282	1,995
Equity in earnings of nonconsolidated affiliates, net of tax	2	2	9	5
Performance Solutions
Segment Reporting [Line Items]
Net sales and operating revenues	686	679	2,188	1,726
Performance Solutions | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	686	679	2,188	1,726
Equity in earnings of nonconsolidated affiliates, net of tax	1	0	2	1
Clean Air
Segment Reporting [Line Items]
Net sales and operating revenues	1,936	1,919	6,084	4,604
Clean Air | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	1,936	1,919	6,084	4,604
Equity in earnings of nonconsolidated affiliates, net of tax	0	0	0	0
Powertrain
Segment Reporting [Line Items]
Net sales and operating revenues	941	928	3,092	2,404
Powertrain | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	941	928	3,092	2,404
Equity in earnings of nonconsolidated affiliates, net of tax	7	7	36	20
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	(87)	(78)	(259)	(211)
Intersegment Revenues | Reclass & Elims
Segment Reporting [Line Items]
Net sales and operating revenues	87	78	259	211
Intersegment Revenues | Motorparts | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(8)	(8)	(27)	(23)
Intersegment Revenues | Performance Solutions | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(23)	(28)	(72)	(78)
Intersegment Revenues | Clean Air | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	(4)	(5)	(14)	(14)
Intersegment Revenues | Powertrain | Operating Segments
Segment Reporting [Line Items]
Net sales and operating revenues	$ (52)	$ (37)	$ (146)	$ (96)