Retirement Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Apr. 01, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan net periodic benefit cost (less than)			$ 1	$ 1
Defined contribution plan, cost		$ 5	2	1
Canada
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation		3	4
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Pension expense		4	4	5
Benefit obligation		54	76	74
Net periodic benefit cost		4	4	$ 5
Accumulated benefit obligation		48	67
Company contributions		2	4
Pension Plans, Defined Benefit | Transferred Veoneer Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation					$ 6
Pension Plans, Defined Benefit | Veoneer Plans
Defined Benefit Plan Disclosure [Line Items]
Company contributions		2	4
Expected future employer contributions, next fiscal year		2
Pension Plans, Defined Benefit | Autoliv Sponsored Plans | U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan expense and contributions		$ 1
Postretirement Benefits Other Than Pension | Canadian Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation			$ 1
Scenario, Forecast | Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 4