Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease, weighted average remaining lease term	9 years
Operating lease, weighted average discount rate, percent	4.30%
Finance lease, weighted average remaining lease term	15 years
Finance lease, weighted average discount rate, percent	5.10%
Operating lease, cost	$ 69.2
Finance lease, cost	0.6
Operating lease, payments	63.1
Right-of-use asset obtained in exchange for operating lease liability	74.8
Operating leases, future minimum payments, next rolling twelve months		$ 55.1
Operating leases, future minimum payments, due in two years		104.4
Operating leases, future minimum payments, due in three years		97.6
Operating leases, future minimum payments, due thereafter		$ 168.5
Sublease income	$ 8.1