Subsequent Events (Notes)

12 Months Ended

Dec. 31, 2018

Subsequent Events [Abstract]

Mergers, Acquisitions and Dispositions Disclosures [Text Block]

24. Subsequent Event

On September 4, 2018, we signed a definitive agreement to acquire 100% of the outstanding capital stock of Hefei Gaomei Cleaning Machines Co., Ltd. and 99% of the outstanding capital stock of Anhui Rongen Environmental Protection Technology Co., Ltd. (collectively "Gaomei"), privately held designers and manufacturers of commercial cleaning solutions based in China. The acquisition closed on January 4, 2019. The purchase price includes cash and contingent consideration which will be paid out over the next few years.  The purchase price and net assets acquired are not significant to our consolidated financial statements.