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Acquisitions - Schedule of Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 737.1	$ 737.9
Adjustment to increase (decrease) goodwill	(0.8)
TimBar Corporation
Business Acquisition [Line Items]
Goodwill	156.2	157.3
Adjustment to increase (decrease) goodwill	(1.1)
Other intangible assets	94.4	94.4
Property, plant and equipment	95.3	95.3
Other net assets	38.6	38.6
Net assets acquired	384.5	$ 385.6
Net assets acquired, Adjustments	$ (1.1)

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Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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