Acquisitions and Divestitures Acquisitions (Details)	Mar. 31, 2018	Mar. 31, 2017
Futian Xinshi [Member]
Business Acquisition [Line Items]
Number of Stores		200
DEUTEK [Member]
Business Acquisition [Line Items]
Number of Stores		3,500
ProCoatings [Member]
Business Acquisition [Line Items]
Number of Stores	23