Site contingency, number of sites.

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Amount of expense for newly incurred environmental loss contingencies. Includes, but is not limited to, remediation expense and interest accretion.

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- Definition

Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

+ References

No definition available.

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Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

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- 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.

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No definition available.

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Name of the individual site or other grouping of the contingency.

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Legal Proceedings - Additional Information (Detail) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) Site	Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items]
Litigation reserve		$ 41	$ 53
Litigation related receivables			10
Deferred Prosecution Agreement
Loss Contingencies [Line Items]
Civil settlement amount	$ 18
Superfund Sites \| Environmental Clean-up
Loss Contingencies [Line Items]
Number of sites \| Site		7
Name of site		Superfund
Environmental reserves		$ 21	$ 7
Superfund Sites \| Environmental Clean-up \| (Loss) Income from Discontinued Operations, Net of Tax
Loss Contingencies [Line Items]
Environmental charge		$ 15