Leases and Other Commitments (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)
Lease liability		$ 568.0
Right of use asset		$ 448.2
Operating Lease, Cost	$ 72.3
Operating Lease, Liability	557.1
Operating Lease, Right-of-Use Asset	$ 417.1
Lessee, Operating Lease, Renewal Term	5
Operating Lease, Remaining Lease Term	18
Lessee, Operating Lease, Option to Terminate	12
Lessee, Operating Lease, Term of Contract	12
Lease Term Recognition-Balance Sheet	12
Short-term Lease, Cost	$ 6.2
Operating Lease, Expense	78.5
Finance Lease, Interest Expense	3.6
Finance Lease, Right-of-Use Asset, Amortization	9.2
Finance Lease, Expense	12.8
Sublease Income	$ 10.2