Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Lessee, Lease, Description [Line Items]
Lease renewal term	5 years
Lease termination period	1 year
Right of use assets	$ 105.3	$ 37.7
Operating lease liabilities	$ 119.3	42.5
Weighted average remaining lease term	12 years 1 month 6 days		4 years 8 months 12 days
Weighted average discount rate	3.48%		3.97%
Lease not yet commenced		$ 7.5
Lease not yet commenced, expected lease term		12 years
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	14 years