Reporting Segments - Net sales by reporting segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information
Net sales	$ 1,426	$ 2,551	$ 3,705	$ 5,117
Inter-segment eliminations
Segment Reporting Information
Net sales	(7)	(16)	(22)	(30)
Engine
Segment Reporting Information
Net sales	819	1,553	2,238	3,137
Engine | Operating Segments
Segment Reporting Information
Net sales	826	1,569	2,260	3,167
Drivetrain
Segment Reporting Information
Net sales	607	998	1,467	1,980
Drivetrain | Operating Segments
Segment Reporting Information
Net sales	$ 607	$ 998	$ 1,467	$ 1,980