Basis of Presentation and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2018
Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life	2 years
Minimum | Vessels
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	10 years
Minimum | Buildings
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	10 years
Minimum | Machinery and equipment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years
Minimum | Software and software development costs
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life	3 years
Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life	20 years
Maximum | Vessels
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	30 years
Maximum | Buildings
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	50 years
Maximum | Machinery and equipment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	20 years
Maximum | Software and software development costs
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life	10 years
Maximum | Internet website costs
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life	3 years