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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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

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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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- Definition

Percentage of estimated target performance level.

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Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value

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Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Performance Period

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Percent Of Awards Earned Based On Achievement Of Targets

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Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Incentive Value Received

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Stock Incentive Plan - Narrative (Details) - USD ($) $ in Millions					3 Months Ended			4 Months Ended	6 Months Ended
	Mar. 01, 2019	Feb. 19, 2019	Jun. 29, 2018	Feb. 18, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	May 31, 2019	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage grantee may earn based on achievement of specific targets								100.00%
Affiliated Entity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated target performance level									50.00%
Performance period									3 years
2018 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grant of common stock for future equity awards (in shares)			3,000,000
Number of shares used for conversion of outstanding grants (in shares)			1,000,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)								133,362
Grant date fair value	$ 1	$ 4		$ 6
Percentage of incentive value received as performance shares									50.00%
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)								126,037
Percentage of incentive value received as performance shares									50.00%
RSUs and PSs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 2	$ 1	$ 1		$ 3	$ 2
Spin-Off \| 2018 Stock Incentive Plan \| Autoliv
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized to be used for conversion of outstanding Autoliv stock awards (in shares)			1,500,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage grantee may earn based on achievement of specific targets									0.00%
Minimum \| Affiliated Entity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage grantee may earn based on achievement of specific targets									0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage grantee may earn based on achievement of specific targets									200.00%
Maximum \| Affiliated Entity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage grantee may earn based on achievement of specific targets									200.00%