Leases (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Lease payments, leases not yet commenced	$ 41.9
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	34 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Right-of-use asset		$ 210.0
Lease liabilities		$ 210.0