Schedule of Number Restricted Stock Units and Performance Shares (Detail) - $ / shares		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value at grant date	[1]	$ 131.51		$ 105.64		$ 100.77
Outstanding at beginning of year		188,410	[2]	188,494	[2]	204,552
Granted		131,246		84,771		71,870
Shares issued		(84,425)		(70,795)		(66,651)
Cancelled/Forfeited/Expired		(6,485)		(14,060)		(21,277)
Spin conversion	[3]	(33,328)
Outstanding at end of year	[2]	262,074		188,410		188,494
Performance Shares
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value at grant date	[1]	$ 105.87		$ 105.87		$ 98.57
Outstanding at beginning of year	[4]	139,891		138,548
Change in performance conditions				(69,274)
Granted	[5]	588		75,379		143,740
Cancelled/Forfeited/Expired		(3,076)		(4,762)		(5,192)
Spin conversion	[6]	(137,403)
Outstanding at end of year	[4]			139,891		138,548

[1] Weighted average fair value at grant date pre-spin.

[2] Outstanding at the end of 2018 reflects the RSUs held by employees of Autoliv and Veoneer, in accordance with the conversion factor described above. Outstanding at the end of 2017 and 2016, respectively reflects RSUs held by employees of Autoliv. The corresponding weighted average grant date fair value after applying the conversion factor is $100.74 as of December 31, 2018.

[3] Reflects the impact of the cancellation of PS awards outstanding as of the Distribution Date, and the conversion to RSUs in accordance with the conversion factor described above.

[4] Outstanding at the end of 2017 and 2016, respectively reflects PSs held by employees of Autoliv.

[5] 2018 grants reflect awards issued pre-spin as a result of dividend equivalent rights.

[6] Reflects the replacement of awards due to the spin-off. Outstanding PS awards were converted to RSU awards in accordance with the conversion factor described above.