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European Commission Fines And Other Legal And Tax Matters (Details) In Millions, unless otherwise specified		0 Months Ended
	Mar. 31, 2013 USD ($)	Sep. 09, 2011 Italy [Member] USD ($)	Sep. 09, 2011 Italy [Member] EUR (€)	Nov. 15, 2005 Italy [Member] EUR (€)
Loss Contingencies [Line Items]
Fines Imposed By European Commission			€ 30	€ 30
Charge Recorded To Accrue European Commission Fine		49.1
Accumulated interest on European Commission fine			5.9
Collateralized guaranteed bank deposit	$ 53.3

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Accumulated Interest On European Commission Fine

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Charge Recorded To Accrue European Commission Fine

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Collateralized Guaranteed Bank Deposit

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Fines Imposed By European Commission

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