Detail of Certain Balance Sheet Information - Additional Detail (Detail) - Redeemable Noncontrolling Interests (Copal Amba) [Member] - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2013	Dec. 31, 2015
Redeemable Noncontrolling Interest [Line Items]
Remaining ownership interest		33.00%
Minimum exercise price option	$ 46.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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