Operating Leases (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) lease_renewal_option
Lessee, Lease, Description [Line Items]
Weighted-average remaining lease term	6 years 2 months 19 days
Number of lease renewal options (at least) | lease_renewal_option	1
Right-of-use asset	$ 312.4
Lease liability	$ 353.1
Weighted average discount rate for the operating leases (percent)	3.49%
Expected lease obligation for lease not yet commenced	$ 232.5
Expected lease term	15 years
Minimum
Lessee, Lease, Description [Line Items]
Renewal lease terms	1 year
Options to terminate leases within period	1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal lease terms	10 years
Options to terminate leases within period	9 years