Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
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-URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
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-URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Goodwill and Intangible Assets - Goodwill (Parenthetical) (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Sacramento Container Corporation
Goodwill [Line Items]
Increase to goodwill, acquisition adjustment			$ 5.5	$ 5.5
Sacramento Container Corporation \| Packaging
Goodwill [Line Items]
Acquisitions		$ 151.1
TimBar and Columbus Container \| Packaging
Goodwill [Line Items]
Decrease to goodwill					$ 5.8
Englander \| Packaging
Goodwill [Line Items]
Acquisitions	$ 28.6