Principles Of Consolidation (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended			0 Months Ended
	Nov. 30, 2011	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2010	Mar. 31, 2012	Mar. 31, 2010	Aug. 19, 2008
Impaired Long-Lived Assets Held and Used [Line Items]
Disposal Group, Including Discontinued Operation, Long Lived Assets		$ 15.3	$ 17.2
Reverse stock split, conversion ratio	0.003333
Rerate reserve as a reduction to accounts receivable		12.2	9.6
Allowance for doubtful accounts		10.0	9.3
Foreign currency transactions gains		5.7	3.7	2.0
Risk-free rate for maturities of workers' compensation claims		0.90%	0.50%	0.40%
Risk-free rate for property damage and liability claims		0.40%	0.30%	0.30%
Accrued claims and insurance		406.6	400.4
Equity investment impairment		0	0	30.8
Assets held for sale impairment charge		6.2	3.9	13.2
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
JHJ international Transportation Co. [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Ownership interest percentage		50.00%
Equity investment impairment			30.8
Accumulated Other Comprehensive Income (Loss) [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Reclassification of net losses to net income		$ 12.7	$ 9.6	$ 9.0
Shanghai Jiayu [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Ownership interest percentage						65.00%	65.00%	65.00%