Business Acquisitions and Dispositions - Summary of Transaction Costs (Details) - Aclara $ in Millions	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Total Aclara Transaction Costs	$ 12.8
Selling & administrative expense
Business Acquisition [Line Items]
Total Aclara Transaction Costs	9.5
Interest expense
Business Acquisition [Line Items]
Total Aclara Transaction Costs	$ 3.3