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Acquisitions - Schedule of Acquisitions (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Business Acquisition [Line Items] |  |
Goodwill | $ 883.2 | $ 883.2
Packaging |  |
Business Acquisition [Line Items] |  |
Goodwill | $ 828.0 | 828.0
Sacramento Container Corporation |  |
Business Acquisition [Line Items] |  |
Other intangible assets |  | 72.6
Property, plant and equipment |  | 26.7
Other net assets |  | 23.4
Net assets acquired |  | 273.8
Sacramento Container Corporation | Packaging |  |
Business Acquisition [Line Items] |  |
Goodwill |  | $ 151.1

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