Legal Proceedings and Other Contingencies (Details)	Mar. 31, 2013 claim	Jun. 28, 2012 Viareggio [Member] claim Insurance_Provider Subsidiaries	Jun. 29, 2009 Viareggio [Member] Employee casualty Car	Jun. 29, 2009 Derailed [Member] Viareggio [Member] Employee Company	Jun. 29, 2009 Overturned [Member] Viareggio [Member] Car	Jun. 29, 2009 Punctured and Ignited [Member] Viareggio [Member] Car	Jun. 28, 2012 Will Not Reimburse the Costs of Criminal Defense [Member] Viareggio [Member] Insurance_Provider
Loss Contingencies [Line Items]
Number of railars			14		5	1
Number of material claims made against workers' compensation and general liability insurance	0	120
Number of casualties			32
Number of subsidiaries		2
Number of companies				4
Number of employees			18	4
Number of insurers		11					1