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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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