Reporting Segments - Segment assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting Information
Total assets	$ 10,892	$ 9,702
Operating Segments
Segment Reporting Information
Total assets	8,533	8,611
Corporate
Segment Reporting Information
Total assets	2,359	1,091
Engine | Operating Segments
Segment Reporting Information
Total assets	4,451	4,536
Drivetrain | Operating Segments
Segment Reporting Information
Total assets	$ 4,082	$ 4,075