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Accounting Policies (Details)
$ in Millions
12 Months Ended
Nov. 30, 2011
Sep. 30, 2010
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]          
Real Estate Held-for-sale     $ 12.0 $ 15.3  
Reverse stock split, conversion ratio 0.003333        
Rerate reserve as a reduction to accounts receivable     8.1 12.2  
Allowance for doubtful accounts     7.4 10.0  
Discontinued Operations          
Foreign currency transactions gains     $ 9.3 $ 5.7 $ 3.7
Risk-free rate for maturities of workers' compensation claims     1.01% 0.90% 0.50%
Risk-free rate for property damage and liability claims     0.70% 0.40% 0.30%
Accrued claims and insurance     $ 392.7 $ 406.6  
Assets held for sale impairment charge     6.2 6.2 $ 3.9
Deferred Finance Costs, Noncurrent, Net     $ 20.2 26.5  
Labor Force Concentration Risk [Member] | Workforce Subject to Collective Bargaining Arrangements [Member]          
Impaired Long-Lived Assets Held and Used [Line Items]          
Percentage of labor force     78.00%    
February 17, 2010 Amendment [Member]          
Impaired Long-Lived Assets Held and Used [Line Items]          
Reverse stock split, conversion ratio   0.04      
Accumulated Other Comprehensive Income (Loss) [Member]          
Discontinued Operations          
Reclassification of net losses to net income     $ 14.1 $ 12.7 $ 9.6