Property, Plant and Equipment, Net (Summary of Property, Plant and Equipment) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment, Net
Land	$ 296.2	$ 332.3
Buildings and leasehold improvements	2,975.1	1,940.7
Machinery, equipment and other	3,942.5	3,106.3
Assets under construction	759.4	2,568.2
Total property, plant and equipment at cost	7,973.2	7,947.5
Less: Accumulated depreciation	(1,520.2)	(1,312.1)
Property, plant and equipment, net	$ 6,453.0	$ 6,635.4

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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