Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Term of leases	10 years
Options to extend, term	5 years
Operating lease expense	$ 39.1
Cash outflow for operating leases	36.4
Right-of-use assets obtained in exchange for operating lease liabilities	$ 22.1
Operating lease, weighted average remaining lease term	4 years
Operating lease, weighted average discount rate	3.50%
Operating leases, rent expense		$ 44.8	$ 30.5
Operating leases minimum annual rentals, 2019		23.5
Operating leases minimum annual rentals, 2020		21.0
Operating leases minimum annual rentals, 2021		16.5
Operating leases minimum annual rentals, 2022		13.2
Operating leases minimum annual rentals, 2023		10.5
Operating leases minimum annual rentals, thereafter		$ 26.5