Quarterly report pursuant to Section 13 or 15(d)

Lease Obligations (Future Minimum Lease Payments) (Details)

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Lease Obligations (Future Minimum Lease Payments) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Operating Leased Assets [Line Items]  
2012, Capital Leases (April 1 - December 31) $ 61.3
2013, Capital Leases 72.1
2014, Capital Leases 66.8
2015, Capital Leases 55.5
2016, Capital Leases 40.7
2017 and thereafter, Capital Leases 132.5
Total minimum lease payments, Capital Leases 428.9
Amounts representing interest, Capital Leases 107.4
Present value of net minimum lease payments, Capital Leases 321.5 [1]
2012, Operating Leases (April 1 - December 31) 18.2
2013, Operating Leases 24.0
2014, Operating Leases 19.7
2015, Operating Leases 12.8
2016, Operating Leases 8.7
2017 and thereafter, Operating Leases 29.8
Total minimum lease payments, Operating Leases 113.2
Other Current Liabilities [Member]
 
Operating Leased Assets [Line Items]  
Present value of net minimum lease payments, Capital Leases 56.3
Other Liabilities [Member]
 
Operating Leased Assets [Line Items]  
Present value of net minimum lease payments, Capital Leases $ 265.2
[1] The total is comprised of $56.3 million and $265.2 million classified as Other current liabilities and Other liabilities, respectively, in the Statements of Unaudited Condensed Consolidated Financial Position at March 31, 2012