Restructuring- Employee Related and Other Restructuring Accruals (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Reserve
Provision	$ 20			$ 14			$ 72	$ 41
Employee Severance
Restructuring Reserve
Beginning balance	46	$ 33	$ 34	18	$ 12	$ 25	34	25
Provision	10	28	12	8	8	7
Cash payments	(12)	(15)	(13)	(8)	(2)	(20)
Ending balance	44	46	33	18	18	12	44	18
Drivetrain | Employee Severance
Restructuring Reserve
Beginning balance	21	5	4	4	4	4	4	4
Provision	1	17	1	0	0	0
Cash payments	(1)	(1)	0	(1)	0	0
Ending balance	21	21	5	3	4	4	21	3
Engine | Employee Severance
Restructuring Reserve
Beginning balance	25	28	30	14	8	21	30	21
Provision	9	11	11	8	8	7
Cash payments	(11)	(14)	(13)	(7)	(2)	(20)
Ending balance	$ 23	$ 25	$ 28	$ 15	$ 14	$ 8	$ 23	$ 15