Derivatives Financial Instruments - Additional Information (Detail) - 9 months ended Sep. 30, 2017	USD ($) ForwardContract	EUR (€) ForwardContract	CLP ($) ForwardContract
Derivatives Not Designated as Hedge Instrument [Member] | PM [Member] | Above Zero Point Nine Zero Percentage Euribor [Member] | PM Group [Member]
Derivative [Line Items]
Notional amount | €		€ 569,000
Notional amount, original amount | €		€ 482,000
Derivative contract maturity date	Oct. 01, 2020
Derivative contract interest rate	3.90%	3.90%	3.90%
Derivatives Not Designated as Hedge Instrument [Member] | PM [Member] | Above Zero Point Nine Zero Percentage Euribor [Member] | PM Group [Member] | Minimum [Member]
Derivative [Line Items]
Derivative contract interest rate	0.90%	0.90%	0.90%
Forward Currency Contracts [Member] | Derivatives Designated as Hedge Instrument [Member]
Derivative [Line Items]
Notional amount | $	$ 0
Unrealized pre-tax gains or losses | $	$ 0
Forward Currency Contracts [Member] | Derivatives Not Designated as Hedge Instrument [Member]
Derivative [Line Items]
Number of forward currency exchange contracts | ForwardContract	1	1	1
Contract maturity date	Jan. 29, 2018
Contractual obligation foreign currency contracts | €		€ 3,201,000
Forward Currency Contracts [Member] | Derivatives Not Designated as Hedge Instrument [Member] | Chile Pesos [Member]
Derivative [Line Items]
Contractual obligation foreign currency contracts | $			$ 2,500,000,000