Contingencies - Summary of Cumulative Trauma Product Liability Claims Activity (Details) - LegalMatter	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Lawsuit
Loss Contingency, Quantities [Roll Forward]
Open lawsuits, beginning of period	1,420	1,794
New lawsuits	280	398
Settled and dismissed lawsuits	(183)	(772)
Open lawsuits, end of period	1,517
Damages from Product Defects
Loss Contingency, Quantities [Roll Forward]
Open lawsuits, beginning of period	2,242	3,023
New lawsuits	363	455
Settled and dismissed lawsuits	(213)	(1,236)
Open lawsuits, end of period	2,392