Leases - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Operating Leased Assets [Line Items]
Option to extend lease term	5 years	5 years
Option to terminate lease term		1 year
Operating lease expense	$ 17.9	$ 35.9
Minimum
Operating Leased Assets [Line Items]
Remaining lease terms		1 year
Maximum
Operating Leased Assets [Line Items]
Remaining lease terms		10 years