Principles Of Consolidation (Estimated Cash Payments) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Workers' Compensation [Member]
  
Liability for Unpaid Claims and Claims Adjustment Expense, Adjustment of Opening Balance [Line Items]  
2014 $ 84.3
2015 59.0
2016 41.5
2017 30.2
2018 22.8
Thereafter 109.2
Total 347.0
Property Damage and Liability Claims [Member]
  
Liability for Unpaid Claims and Claims Adjustment Expense, Adjustment of Opening Balance [Line Items]  
2014 23.2
2015 18.6
2016 13.7
2017 6.9
2018 3.9
Thereafter 2.5
Total 68.8
Total [Member]
  
Liability for Unpaid Claims and Claims Adjustment Expense, Adjustment of Opening Balance [Line Items]  
2014 107.5
2015 77.6
2016 55.2
2017 37.1
2018 26.7
Thereafter 111.7
Total $ 415.8