Acquisitions - Additional Information (Details) $ in Millions	Oct. 02, 2017 USD ($)
Sacramento Container Corporation
Business Acquisition [Line Items]
Acquisition completion date	Oct. 02, 2017
Cash purchase price	$ 274
Maximum Acquisition period to finalize valuation	12 months
Acquired finite-lived intangible assets, weighted average useful life	9 years 8 months 12 days
Sacramento Container Corporation \| Minimum
Business Acquisition [Line Items]
Property, plant and equipment useful life	1 year
Sacramento Container Corporation \| Maximum
Business Acquisition [Line Items]
Property, plant and equipment useful life	13 years
Northern Sheets LLC And Central California Sheets LLC
Business Acquisition [Line Items]
Percentage of membership interests acquired	100.00%

Business combination maximum period to finalize valuation.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e845-128460

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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.

+ References

No definition available.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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