Restructuring- Employee Related and Other Restructuring Accruals (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Reserve
Provision	$ 37		$ 13		$ 52	$ 27
Employee Severance
Restructuring Reserve
Beginning balance	33	$ 34	12	$ 25	34	25
Provision	28	12	8	7
Cash payments	(15)	(13)	(2)	(20)
Ending balance	46	33	18	12	46	18
Employee Severance | Drivetrain
Restructuring Reserve
Beginning balance	5	4	4	4	4	4
Provision	17	1	0	0
Cash payments	(1)	0	0	0
Ending balance	21	5	4	4	21	4
Employee Severance | Engine
Restructuring Reserve
Beginning balance	28	30	8	21	30	21
Provision	11	11	8	7
Cash payments	(14)	(13)	(2)	(20)
Ending balance	$ 25	$ 28	$ 14	$ 8	$ 25	$ 14