Leases and Commitments (Minimum Rental Commitments and Purchase Obligations) (Details) $ in Millions	Dec. 31, 2016 USD ($)
2017, Leases	$ 62.6
2018, Leases	46.2
2019, Leases	41.8
2020, Leases	32.3
2021, Leases	26.7
Later years, Leases	68.5
Sublease rental income, Leases	(30.3)
Total, Leases	247.8
2017, Purchase Obligations	177.8
2018, Purchase Obligations	117.4
2019, Purchase Obligations	71.5
2020, Purchase Obligations	57.5
2021, Purchase Obligations	30.5
Later years, Purchase Obligations	27.2
Total, Purchase Obligations	$ 481.9