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 additional awards granted.

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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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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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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 cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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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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Number of shares authorized for issuance under share-based payment arrangement.

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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 shares issued under share-based payment arrangement.

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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 outstanding award under share-based payment arrangement. Excludes share 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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- Definition

Value, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Stock Incentive Plan - Additional Information (Detail) - USD ($)		12 Months Ended
	Jun. 29, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	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 6 months
Unrecognized compensation costs associated with SOs		$ 0
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value		$ 22,600,000
Restricted Stock Units (RSUs) \| Chairman
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of additional awards granted		50.00%
Restricted Stock Units (RSUs) \| Non-employee Directors
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value		$ 1,500,000
Percentage of awards granted		54.00%
Number of common shares that have been issued for awards		25,301
Restricted Stock Units (RSUs) \| LTI Program
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value		$ 6,600,000
Performance Shares \| LTI Program
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value		$ 5,700,000
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		6,674,658
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		77,925
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		$ 92.10
Aggregate intrinsic value for stock options outstanding		$ 2,200,000
Aggregate intrinsic value for stock options exercisable		2,200,000
Restricted Stock Units And Performance Shares
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock compensation cost		11,700,000	$ 8,400,000	$ 9,100,000
Total compensation cost related to non-vested awards		$ 16,000,000
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: 1) 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 2) 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%