Percentage of outstanding awards as of distribution date.

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Percentage of restricted stock units prior to spinoff transaction continue to be applicable to entity.

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Percentage of restricted stock units prior to spinoff transaction replaced with restricted stock units to spun entity.

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Percentage of stock options prior to spinoff transaction continue to be applicable to entity.

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Percentage of stock options prior to spinoff transaction replaced with stock option of spun entity.

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Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Awards Granted

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Sharebased compensation arrangement by sharebased payment award equity instruments other than options conversion ratio.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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A unique description of a noncash or part noncash stock conversion. The description would be expected to include sufficient information to provide an understanding of the nature and purpose of the conversion. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share instruments newly issued under a share-based compensation plan.

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Price of a single share of a number of saleable stocks of a company.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Gross value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Stock Incentive Plan - Additional Information (Detail) - USD ($)			12 Months Ended
	Jun. 29, 2018	Feb. 13, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period over which cost is expected to be recognized			1 year 8 months 12 days
Unrecognized compensation costs associated with stock options			$ 0
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost related to non-vested awards			10,300,000
Aggregate intrinsic value			18,400,000
Restricted Stock Units (RSUs) \| Non-employee Directors
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value			$ 1,400,000
Percentage of awards granted			50.00%
Number of common shares that have been issued for awards			7,869
Restricted Stock Units (RSUs) \| LTI Program
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value		$ 16,600,000
Stock Incentive Plan
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum common shares that may be issued for awards			9,585,055
Number of common shares that have been issued for awards			6,394,392
Stock Incentive Plan \| Non-employee Directors
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares that have been issued for awards			37,103
Stock Options
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, grant expiration term						10 years
Employment requisite period following grant date						1 year
Closing price per share			$ 70.23
Aggregate intrinsic value for stock options outstanding			$ 10,000,000
Aggregate intrinsic value for stock options exercisable			10,000,000
Restricted Stock Units And Performance Shares
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock compensation cost			$ 9,100,000	$ 6,100,000	$ 8,400,000
Spin-off
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion of stock description			The conversion that occurred on the Distribution Date was based on the following: SOs - A number of SOs comprising 50% of the value of the outstanding SOs calculated immediately prior to the spin-off continued to be applicable to Autoliv common stock. A number of SOs comprising the remaining 50% percent of the pre spin-off value were replaced with options to acquire shares of Veoneer common stock. RSUs - A number of RSUs comprising 50% of the value of the outstanding RSUs calculated immediately prior to the spin-off continued to be applicable to Autoliv common stock. A number of RSUs comprising the remaining 50% of the pre spin-off value were replaced with RSUs with underlying Veoneer common stock. PSs - Outstanding PSs pre spin-off were converted to time-based RSUs and were divided between Autoliv and Veoneer common stock in the same manner as other outstanding RSUs (as described above) on the Distribution Date. The number of outstanding PSs pre spin-off to be converted was determined based on pro-ration of the performance period such as: The level of actual achievement of performance goals for each outstanding PS for the period between the first day of the performance period and December 31, 2017 (the “Performance Measurement Date”), referred to as “Level of Performance-to-Date”; and The greater of the Level of Performance-to-Date and the target performance level for the period between the Performance Measurement Date and the last day of the performance period. In each case above, the conversion was intended to generally preserve the intrinsic value of the original award determined as of the Distribution Date. The number of converted RSUs and SOs for Autoliv and Veoneer was based on the average of Autoliv closing stock prices for the last 5 trading days prior to the spin-off and the average of closing stock prices of Autoliv and Veoneer, respectively, for the first 5 trading days after the spin-off. Accordingly, 50% of the outstanding awards as of the Distribution Date, and the related exercise price, were converted to Adjusted Autoliv Awards using a conversion factor of 1.41.
Percentage of outstanding awards as of distribution date	50.00%
Spin-off \| Veoneer, Inc.
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion ratio			1.41
Spin-off \| Common stock
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of stock option continue to be applicable to the entity			50.00%
Percentage of RSUs prior to spinoff continue to applicable to the entity			50.00%
Spin-off \| Common stock \| Veoneer, Inc.
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of stock option and replaced with stock option of the spun entity			50.00%
Percentage of RSUs prior to spinoff and replaced with RSUs of the spun entity			50.00%