Pensions - Weighted Average Assumptions Used to Determine Net Periodic Benefit Costs (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
UNITED STATES
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	4.20%	3.55%	3.95%
Foreign Plan [Member]
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	3.65%	3.40%	3.70%
Pension Plan [Member] | UNITED STATES
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	4.25%	3.55%	3.99%
Expected return on plan assets	6.50%	6.50%	6.60%
Pension Plan [Member] | Foreign Plan [Member]
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	2.40%	2.17%	2.23%
Expected return on plan assets	4.63%	5.82%	5.94%
Rate of compensation increase	3.31%	3.17%	3.15%