v3.5.0.2

Commitments and Contingencies - Legal Proceedings - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) Plaintiff
Loss Contingencies [Line Items]
Accrual for lawsuits	$ 34.5
Expected lawsuits reimbursement amount pursuant to the indemnity provisions of excess liability insurance policies	25.0
Offsetting receivable from insurance carriers	$ 9.5
Calcasieu River Estuary in Lake Charles Louisiana [Member]
Loss Contingencies [Line Items]
Number of individuals that have filed lawsuits against the Company | Plaintiff	2,607

X

- Definition

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
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X

- Definition

The amount of insurance-related assessment liability that is expected to be recovered through policy surcharges applied to in-force policies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 405
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6392405&loc=d3e24119-109301

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Balance Type:	debit
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X

- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

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X

- Details

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