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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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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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Segment Information (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Integration-related, facilities closure and other costs	$ 0.5	$ 2.6	$ 1.3	$ 4.5
DeRidder mill incident	2.5		(2.5)
Hexacomb working capital adjustment			2.3
Packaging And Corporate And Other
Segment Reporting Information [Line Items]
Integration-related, facilities closure and other costs		$ 2.9	1.2	$ 5.7
Packaging And Corporate And Other \| Hexacomb in Europe and Mexico
Segment Reporting Information [Line Items]
Hexacomb working capital adjustment			2.3
DeRidder, Louisiana \| Packaging
Segment Reporting Information [Line Items]
Integration-related, facilities closure and other costs	$ 0.5
DeRidder mill incident			$ (5.0)