Pension Plans, Postretirement and Other Employee Benefits - Amounts to be Reflected as Component of Net Periodic Cost (Detail) $ in Millions	Dec. 31, 2019 USD ($)
Other Postretirement Benefits Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 2
Prior service cost	(9)
Total	(7)
U.S. | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	6
Prior service cost	0
Total	6
Non-U.S. | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	9
Prior service cost	0
Total	$ 9