Lease Obligations Lease Obligations (Supplemental Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 158.8
Current portion of operating lease liabilities	39.3	$ 32.0
Operating lease liabilities	121.6
Total operating lease liabilities	160.9
Sundry	4.3
Current maturities of long-term debt	1.1
Long-term debt	3.1
Total finance lease liabilities	$ 4.2