Revenue from Contracts with Customers - Disaggregation of revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue
Net sales	$ 1,426	$ 2,551	$ 3,705	$ 5,117
North America
Disaggregation of Revenue
Net sales	357	868	1,167	1,725
Europe
Disaggregation of Revenue
Net sales	428	971	1,330	1,999
Asia
Disaggregation of Revenue
Net sales	630	673	1,163	1,316
Other
Disaggregation of Revenue
Net sales	11	39	45	77
Engine
Disaggregation of Revenue
Net sales	819	1,553	2,238	3,137
Engine | North America
Disaggregation of Revenue
Net sales	167	407	554	819
Engine | Europe
Disaggregation of Revenue
Net sales	338	760	1,049	1,561
Engine | Asia
Disaggregation of Revenue
Net sales	306	356	597	696
Engine | Other
Disaggregation of Revenue
Net sales	8	30	38	61
Drivetrain
Disaggregation of Revenue
Net sales	607	998	1,467	1,980
Drivetrain | North America
Disaggregation of Revenue
Net sales	190	461	613	906
Drivetrain | Europe
Disaggregation of Revenue
Net sales	90	211	281	438
Drivetrain | Asia
Disaggregation of Revenue
Net sales	324	317	566	620
Drivetrain | Other
Disaggregation of Revenue
Net sales	$ 3	$ 9	$ 7	$ 16