Lease Obligations (Future Minimum Lease Payments) (Details) (USD $) In Millions	Sep. 30, 2011
2011, Capital Leases	$ 16.8
2012, Capital Leases	62.6
2013, Capital Leases	55.0
2014, Capital Leases	50.0
2015, Capital Leases	38.8
2016 and thereafter, Capital Leases	99.0
Total minimum lease payments, Capital Leases	322.2
Amounts representing interest, Capital Leases	68.6
Present value of net minimum lease payments, Capital Leases	253.6	[1]
2011, Operating Leases	7.7
2012, Operating Leases	21.2
2013, Operating Leases	20.8
2014, Operating Leases	16.0
2015, Operating Leases	9.1
2016 and thereafter, Operating Leases	25.0
Total minimum lease payments, Operating Leases	99.8
Other Current Liabilities [Member]
Present value of net minimum lease payments, Capital Leases	47.8
Other Liabilities [Member]
Present value of net minimum lease payments, Capital Leases	$ 205.8

[1] The total is comprised of $47.8 million and $205.8 million classified as Other current liabilities and Other liabilities, respectively, on the Statements of Unaudited Condensed Consolidated Financial Position at September 30, 2011.