Property, Plant and Equipment, Net (Summary of Property, Plant and Equipment) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment, Net
Land	$ 301.1	$ 332.3
Buildings and leasehold improvements	2,940.1	1,940.7
Machinery, equipment and other	3,803.2	3,106.3
Assets under construction	785.8	2,568.2
Total property, plant and equipment at cost	7,830.2	7,947.5
Less: Accumulated depreciation	(1,403.6)	(1,312.1)
Property, plant and equipment, net	$ 6,426.6	$ 6,635.4