Leases (Maturities of Operating and Finance Lease Obligations Under Topic 840) (Details) $ in Millions	Dec. 31, 2018 USD ($)
Operating leases
2019	$ 123.9
2020	85.4
2021	66.6
2022	54.3
2023	46.8
Thereafter	178.6
Total payments	555.6
Finance leases
2019	101.4
2020	107.3
2021	96.7
2022	94.5
2023	93.5
Thereafter	464.0
Total payments	957.4
Amounts representing interest	(336.1)
Total finance leases	621.3
Current portion	78.2
Noncurrent portion	$ 543.1