Goodwill and Other Intangible Assets - Goodwill (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2021 USD ($) reporting_unit	Sep. 30, 2020 reporting_unit	Dec. 31, 2020 USD ($)
Goodwill [Roll Forward]
Gross carrying amount at beginning of period	$ 1,253	$ 1,251	$ 1,254	$ 1,254
Foreign exchange	(1)	2	(3)
Gross carrying amount at end of period	1,252	1,253	1,251	1,252
Accumulated impairment loss, beginning balance	(745)	(743)	(746)	(746)
Foreign exchange	1	(2)	3
Accumulated impairment loss, ending balance	(744)	(745)	(743)	(744)
Net carrying value at September 30, 2021	508			508		$ 508
Number of reporting units with goodwill | reporting_unit					2
Motorparts
Goodwill [Roll Forward]
Gross carrying amount at beginning of period	623	623	623	623
Foreign exchange	0	0	0
Gross carrying amount at end of period	623	623	623	623
Accumulated impairment loss, beginning balance	(310)	(310)	(310)	(310)
Foreign exchange	0	0	0
Accumulated impairment loss, ending balance	(310)	(310)	(310)	(310)
Net carrying value at September 30, 2021	313			$ 313
Number of reporting units with goodwill | reporting_unit				1	1
Performance Solutions
Goodwill [Roll Forward]
Gross carrying amount at beginning of period	548	546	549	$ 549
Foreign exchange	(1)	2	(3)
Gross carrying amount at end of period	547	548	546	547
Accumulated impairment loss, beginning balance	(376)	(374)	(377)	(377)
Foreign exchange	1	(2)	3
Accumulated impairment loss, ending balance	(375)	(376)	(374)	(375)
Net carrying value at September 30, 2021	172			$ 172
Number of reporting units with goodwill | reporting_unit				2	1
Clean Air
Goodwill [Roll Forward]
Gross carrying amount at beginning of period	23	23	23	$ 23
Foreign exchange		0	0
Gross carrying amount at end of period	23	23	23	23
Accumulated impairment loss, beginning balance	0	0	0	0
Foreign exchange		0	0
Accumulated impairment loss, ending balance	0	0	0	0
Net carrying value at September 30, 2021	23			$ 23
Number of reporting units with goodwill | reporting_unit				3
Powertrain
Goodwill [Roll Forward]
Gross carrying amount at beginning of period	59	59	59	$ 59
Foreign exchange	0	0	0
Gross carrying amount at end of period	59	59	59	59
Accumulated impairment loss, beginning balance	(59)	(59)	(59)	(59)
Foreign exchange	0	0	0
Accumulated impairment loss, ending balance	(59)	$ (59)	$ (59)	(59)
Net carrying value at September 30, 2021	0			$ 0
Number of reporting units with goodwill | reporting_unit					1
Greater than 25% | Motorparts
Goodwill [Roll Forward]
Number of reporting units with goodwill | reporting_unit				1
Goodwill for reporting units where fair value exceeds carrying value	313			$ 313
Greater than 25% | Performance Solutions
Goodwill [Roll Forward]
Number of reporting units with goodwill | reporting_unit				1
Goodwill for reporting units where fair value exceeds carrying value	7			$ 7
Greater than 25% | Clean Air
Goodwill [Roll Forward]
Number of reporting units with goodwill | reporting_unit				3
Goodwill for reporting units where fair value exceeds carrying value	23			$ 23
Less than 25% | Motorparts
Goodwill [Roll Forward]
Number of reporting units with goodwill | reporting_unit				0
Goodwill for reporting units where fair value exceeds carrying value	0			$ 0
Less than 25% | Performance Solutions
Goodwill [Roll Forward]
Number of reporting units with goodwill | reporting_unit				1
Goodwill for reporting units where fair value exceeds carrying value	165			$ 165
Less than 25% | Clean Air
Goodwill [Roll Forward]
Number of reporting units with goodwill | reporting_unit				0
Goodwill for reporting units where fair value exceeds carrying value	$ 0			$ 0