Derivative Financial Instruments - Effect of Derivatives Financial Instruments on Consolidated Statements of Earnings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss), Net of Tax, Recognized in OCI on Derivatives (Effective Portion)	$ 2,084		$ (9,833)		$ (3,568)
Amount of Gain or (Loss), Net of Tax, Reclassified from Accumulated OCI into Earnings on Derivatives (Effective Portion)	(7,216)	[1]	(2,333)	[2]	132
Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	(11,864)		2,210		18,181
Cost of Products Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss), Net of Tax, Reclassified from Accumulated OCI into Earnings on Derivatives (Effective Portion)	(7,216)		(2,333)
Cost of Products Sold [Member] | Commodity Contracts [Member] | Derivatives Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss), Net of Tax, Recognized in OCI on Derivatives (Effective Portion)	2,084		(9,833)		(3,568)
Amount of Gain or (Loss), Net of Tax, Reclassified from Accumulated OCI into Earnings on Derivatives (Effective Portion)	(7,216)		(2,333)		132
Cost of Products Sold [Member] | Commodity Contracts [Member] | Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	(8,829)		2,269		14,572
Cost of Products Sold [Member] | Foreign Exchange Contracts [Member] | Derivatives Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Earnings on Derivatives	$ (3,035)		$ (59)		$ 3,609

[1] Includes $7,216 and $72 net-of-tax impact of accumulated other comprehensive income reclassifications into cost of products sold for net losses on commodity contracts and adjustment to early retiree medical plan, respectively. The tax impacts of these reclassifications were $2,500 and $17, respectively. Also includes a $158.6 million reclassification of cumulative foreign currency translation losses into losses and impairments of assets, of which there was no tax impact.

[2] Includes $2,333 and $57 net-of-tax impact of accumulated other comprehensive income reclassifications into cost of products sold for net losses on commodity contracts and adjustment to early retiree medical plan, respectively. The tax impacts of these reclassifications were $700 and $49, respectively.