Legal Proceedings and Other Contingencies Legal Proceedings and Other Contingencies (Details) - Viareggio [Member] € in Millions	3 Months Ended
	Mar. 31, 2017 EUR (€) Employee	Jun. 20, 2019 Employee	Jun. 29, 2009 Car
Legal Proceedings and Other Contingencies [Line Items]
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims | €	€ 1.4
Employees Charged with Negligence | Employee	8
Employees Acquitted From Negligence Charges | Employee		1
Overturned [Member]
Legal Proceedings and Other Contingencies [Line Items]
Number of railars			5
Punctured and Ignited [Member]
Legal Proceedings and Other Contingencies [Line Items]
Number of railars			1
Derailed [Member]
Legal Proceedings and Other Contingencies [Line Items]
Number of railars			14