Mergers and Acquisitions - Finite Lived Intangible Assets Acquired (Details) - OnX Holdings LLC [Member] $ in Millions	Oct. 02, 2017 USD ($)
Business Acquisition [Line Items]
Fair Value	$ 134.0
Customer relationships
Business Acquisition [Line Items]
Fair Value	$ 108.0
Useful Lives	15 years
Trade name
Business Acquisition [Line Items]
Fair Value	$ 16.0
Useful Lives	10 years
Technology
Business Acquisition [Line Items]
Fair Value	$ 10.0
Useful Lives	10 years