Significant Accounting Policies - PP&E (Details)	12 Months Ended
	Dec. 31, 2020
Buildings and improvements | Maximum
Property, plant and equipment
Estimated useful life	40 years
Majority of estimated useful life	40 years
Buildings and improvements | Minimum
Property, plant and equipment
Estimated useful life	10 years
Majority of estimated useful life	20 years
Machinery and equipment | Maximum
Property, plant and equipment
Estimated useful life	15 years
Majority of estimated useful life	10 years
Machinery and equipment | Minimum
Property, plant and equipment
Estimated useful life	3 years
Majority of estimated useful life	5 years