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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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Property, Plant And Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Property, plant and equipment, gross	$ 5,328.3	$ 5,819.4
Accumulated depreciation	(2,068.5)	(1,947.9)
Property, plant and equipment, net	3,259.8	3,871.5
Depreciation expense	367.8	370.2	$ 283.2
Land and land improvements
Property, Plant and Equipment [Abstract]
Property, plant and equipment, gross	103.5	105.2
Buildings
Property, Plant and Equipment [Abstract]
Property, plant and equipment, gross	656.7	691.2
Vessels
Property, Plant and Equipment [Abstract]
Property, plant and equipment, gross	1,893.3	2,246.0
Machinery and equipment
Property, Plant and Equipment [Abstract]
Property, plant and equipment, gross	1,905.7	1,892.2
Office fixtures and furniture
Property, Plant and Equipment [Abstract]
Property, plant and equipment, gross	300.0	350.4
Construction in process
Property, Plant and Equipment [Abstract]
Property, plant and equipment, gross	179.0	136.7
Other
Property, Plant and Equipment [Abstract]
Property, plant and equipment, gross	$ 290.1	$ 397.7