Basis of Presentation - Additional Information (Details) - product_area		9 Months Ended
	Jun. 29, 2018	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Number of product areas		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