Retirement Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - Pension Plans, Defined Benefit - Existing Veoneer Plans - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 2	$ 4	$ 4
Interest cost	0	0	1	1
Expected return on plan assets	(1)	(1)	(1)	(2)
Net periodic benefit cost	$ 0	$ 1	$ 4	$ 3