Reporting Segments - Net sales by reporting segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information
Net sales	$ 2,534	$ 2,492	$ 6,239	$ 7,609
Inter-segment eliminations
Segment Reporting Information
Net sales	(17)	(15)	(39)	(45)
Engine
Segment Reporting Information
Net sales	1,459	1,500	3,697	4,637
Engine | Operating Segments
Segment Reporting Information
Net sales	1,476	1,514	3,736	4,681
Drivetrain
Segment Reporting Information
Net sales	1,075	992	2,542	2,972
Drivetrain | Operating Segments
Segment Reporting Information
Net sales	$ 1,075	$ 993	$ 2,542	$ 2,973