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