Basis of Presentation - Additional Information (Details) - segment		3 Months Ended
Jun. 29, 2018	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Number of operating segments		2
Spin-Off \| Autoliv
Restructuring Cost and Reserve [Line Items]
Distribution percentage of outstanding common stock in spinoff transaction	100.00%
Spin off conversion ratio	1
Spin-Off \| Autoliv \| SDR
Restructuring Cost and Reserve [Line Items]
Spin off conversion ratio	1
Spin-Off \| Autoliv \| Common Stock
Restructuring Cost and Reserve [Line Items]
Spin off conversion ratio	1

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration