Schedule of Number of Stock Options (Detail) - $ / shares		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of options, Outstanding beginning balance		299,949		411,109	473,051
Exercised		(92,485)		(100,184)	(51,084)
Cancelled/Forfeited/Expired				(10,976)	(10,858)
Spin conversion	[1]	(65,390)
Number of options, Outstanding ending balance		142,074	[2]	299,949	411,109
Weighted average exercise price, Outstanding beginning balance		$ 89.20		$ 87.47	$ 87.88
Exercised		86.59		79.58	88.10
Cancelled/Forfeited/Expired				112.20	102.31
Spin conversion	[1]	88.75
Weighted average exercise price, Outstanding ending balance		$ 63.43	[2]	$ 89.20	$ 87.47

[1] Reflects the cancellation of SOs outstanding as of the Distribution Date, and the conversion to new awards in accordance with the conversion factor described above. The weighted average exercise price reflects the exercise price of the shares cancelled due to the spin-off.

[2] Reflects outstanding SOs held by employees of Autoliv and Veoneer at the end of the year and the weighted average exercise price, in accordance with the conversion factor described above.