Pension and Other Postretirement Benefits - Assumptions Regarding Net Periodic Pension and Other Postretirement Benefit Costs (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Pension Plan [Member] | Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.00%	2.45%
Expected long-term rate of return	3.55%	4.65%
Minimum [Member] | Defined Benefit Pension Plan [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.19%	3.63%
Expected long-term rate of return	6.60%	6.95%
Minimum [Member] | Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.97%	3.46%
Maximum [Member] | Defined Benefit Pension Plan [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.34%	4.34%
Expected long-term rate of return	7.25%	7.50%
Maximum [Member] | Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.33%	3.69%