Schedule of Disaggregated Revenue by Products and Region (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Net sales		$ 2,022	$ 1,048	$ 4,265	$ 2,893
Airbag Products and Other
Disaggregation Of Revenue [Line Items]
Net sales	[1]	1,310	654	2,773	1,856
Seatbelt Products
Disaggregation Of Revenue [Line Items]
Net sales	[1]	712	394	1,491	1,037
Asia
Disaggregation Of Revenue [Line Items]
Net sales		794	588	1,671	1,185
China
Disaggregation Of Revenue [Line Items]
Net sales		399	366	814	564
Japan
Disaggregation Of Revenue [Line Items]
Net sales		175	105	386	308
Rest of Asia
Disaggregation Of Revenue [Line Items]
Net sales		219	117	471	314
Americas
Disaggregation Of Revenue [Line Items]
Net sales		621	213	1,307	886
Europe
Disaggregation Of Revenue [Line Items]
Net sales		$ 608	$ 246	$ 1,287	$ 823

[1] Including Corporate and other sales.