Retirement Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plans			us-gaap:PensionPlansDefinedBenefitMember
Existing Veoneer Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 2	$ 2
Interest cost	1	1	1	1
Expected return on plan assets	(1)	(1)	(1)	(1)
Net periodic benefit cost	$ 1	$ 1	$ 2	$ 2