Leases - Maturities (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Maturities of Operating Lease Liabilities
Due within 1 year	$ 49.7
Due after 1 year through 2 years	43.0
Due after 2 years through 3 years	36.4
Due after 3 years through 4 years	32.7
Due after 4 years through 5 years	29.8
Due after 5 years	98.1
Total lease payments	289.7
Less imputed interest	(54.8)
Operating lease liabilities	$ 234.9	$ 242.3