Quarterly report pursuant to Section 13 or 15(d)

Revenue from Contracts with Customer (Details)

v3.8.0.1
Revenue from Contracts with Customer (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Revenue from Contract with Customer [Abstract]    
Receivables from contracts with customers $ 125.8 $ 135.0