Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Details)

v3.19.1
Basis of Presentation - Additional Information (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Contract with customer, asset, net $ 33.8 $ 18.0