Schedule of Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Operating leases:
Operating lease right-of-use assets	$ 238.0
Current portion of operating lease obligations	59.9
Long-term portion of operating lease obligations	183.4
Total operating lease obligations	243.3
Finance leases:
Total	6,833.6	$ 6,691.1
Less accumulated amortization	(3,726.4)	(3,582.5)
Total	3,107.2	3,108.6
Current portion of finance lease obligations	1.5	1.4
Long-term portion of finance lease obligations	16.8	17.6
Total finance lease obligations	$ 18.3
Weighted-average remaining lease term (years):
Operating leases	5 years 10 months 24 days
Finance leases	9 years 3 months 18 days
Weighted-average discount rate:
Operating leases	4.38%
Finance leases	6.66%
Buildings
Finance leases:
Total	$ 812.0	795.5
Machinery and Equipment
Finance leases:
Total	5,603.6	$ 5,481.6
Finance Leases
Finance leases:
Total	28.8
Less accumulated amortization	(17.4)
Total	11.4
Finance Leases | Buildings
Finance leases:
Total	0.3
Finance Leases | Machinery and Equipment
Finance leases:
Total	$ 28.5