Revenue from Contracts with Customers - Disaggregation of revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue
Net sales	$ 2,534	$ 2,492	$ 6,239	$ 7,609
North America
Disaggregation of Revenue
Net sales	840	853	2,007	2,578
Europe
Disaggregation of Revenue
Net sales	844	919	2,174	2,918
Asia
Disaggregation of Revenue
Net sales	820	681	1,983	1,997
Other
Disaggregation of Revenue
Net sales	30	39	75	116
Engine
Disaggregation of Revenue
Net sales	1,459	1,500	3,697	4,637
Engine | North America
Disaggregation of Revenue
Net sales	384	397	938	1,216
Engine | Europe
Disaggregation of Revenue
Net sales	658	716	1,707	2,277
Engine | Asia
Disaggregation of Revenue
Net sales	391	357	988	1,053
Engine | Other
Disaggregation of Revenue
Net sales	26	30	64	91
Drivetrain
Disaggregation of Revenue
Net sales	1,075	992	2,542	2,972
Drivetrain | North America
Disaggregation of Revenue
Net sales	456	456	1,069	1,362
Drivetrain | Europe
Disaggregation of Revenue
Net sales	186	203	467	641
Drivetrain | Asia
Disaggregation of Revenue
Net sales	429	324	995	944
Drivetrain | Other
Disaggregation of Revenue
Net sales	$ 4	$ 9	$ 11	$ 25