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Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Disclosure Derivative Instruments And Hedging Activities Narrative [Abstract] |  |  |
Notional value of foreign exchange contracts | $ 178 | $ 155 |
Net cash outflow/inflow from settlement of derivative contracts | $ 13.0 | $ 4.7 | $ 10.2

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- Definition Aggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
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- Definition The net cash outflow or inflow from derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments. + References No definition available. + Details
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