Retirement Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plans			Pension Plan [Member]
Existing Veoneer Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 3	$ 3
Interest cost	1	1	2	2
Expected return on plan assets	(1)	(1)	(2)	(2)
Net periodic benefit cost	$ 1	$ 1	$ 3	$ 3