Pensions and Postretirement Benefits Other than Pensions - Weighted Average Assumptions Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.70%	3.20%	3.54%
Expected return on plan assets	5.00%	5.34%	5.57%
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.05%	3.50%	3.95%
Expected return on plan assets	0.00%	0.00%	0.00%
United States | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.05%	3.50%	3.90%
Expected return on plan assets	5.66%	6.25%	6.50%
United States | Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.05%	3.50%	3.95%
Expected return on plan assets	0.00%	0.00%	0.00%
Foreign Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.80%	2.50%	2.50%
Expected return on plan assets	3.34%	3.19%	3.29%
Foreign Plan | Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	0.00%	0.00%	0.00%
Expected return on plan assets	0.00%	0.00%	0.00%