Business Segments (Details)	6 Months Ended
Jun. 30, 2018 segment
Business Segments
Number of business segments	5
Percentage of net sales for countries that centralized sales districts to overall international net sales	70.00%

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration