Contingent Liabilities - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($) Vehicle	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Product liability accrual	$ 120	$ 103	$ 341	$ 58	$ 58	$ 72
Unannounced Recall | Damages from Product Defects
Loss Contingencies [Line Items]
Product liability accrual			$ 26
ZF Inflator Recall | Maximum
Loss Contingencies [Line Items]
Estimate potential loss	43
ZF Inflator Recall | Minimum
Loss Contingencies [Line Items]
Estimate potential loss	0
ZF Inflator Recall | Damages from Product Defects
Loss Contingencies [Line Items]
Product liability accrual	$ 0
ZF Inflator Recall | Damages from Product Defects | Global
Loss Contingencies [Line Items]
Number of vehicles recalled | Vehicle	762,000