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Derivative Instruments And Hedging Activities (Schedule Of Derivative Instruments In Statement Of Financial Position, Fair Value) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended |
|---|---|---|
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Mar. 31, 2012
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Dec. 31, 2011
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| Derivatives, Fair Value [Line Items] | ||
| Derivative asset, fair value | 78.8 | 165.9 |
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Derivative Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Derivative liability, fair value | 3.6 | 23.0 |
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Accounts Receivable [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Derivative asset, fair value | 83.8 | |
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Designated as Hedging Instrument [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Derivative asset, fair value | 9.6 | 5.2 |
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Designated as Hedging Instrument [Member] | Derivative Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Derivative liability, fair value | 2.5 | 3.5 |
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Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Description of Location of Foreign Currency Derivatives on Balance Sheet | Othercurrentliabilities | Othercurrentliabilities |
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Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Derivative Assets (Current) [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Cash Flow Hedge Derivative Instrument Assets at Fair Value | 9.6 | 5.2 |
| Description of Location of Foreign Currency Derivatives on Balance Sheet | Derivativeassets(current) | Derivativeassets(current) |
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Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Cash Flow Hedge Derivative Instrument Liabilities at Fair Value | 2.5 | 3.5 |
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Not Designated as Hedging Instrument [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Derivative asset, fair value | 69.2 | 160.7 |
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Not Designated as Hedging Instrument [Member] | Derivative Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Derivative liability, fair value | 1.1 | 19.5 |
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Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Derivative Assets (Current) [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Description of Location of Foreign Currency Derivatives on Balance Sheet | Derivativeassets(current) | Derivativeassets(current) |
| Derivative asset, fair value | 2.8 | |
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Not Designated as Hedging Instrument [Member] | Customer Contracts [Member] | Derivative Assets (Current) [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Description of Location of Foreign Currency Derivatives on Balance Sheet | Derivativeassets(current) | Derivativeassets(current) |
| Derivative asset, fair value | 65.1 | 72.9 |
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Not Designated as Hedging Instrument [Member] | Provisional Pricing Arrangements [Member] | Derivative Assets (Current) [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Description of Location of Foreign Currency Derivatives on Balance Sheet | Derivativeassets(current) | Derivativeassets(current) |
| Derivative asset, fair value | 4.1 | 1.2 |
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Not Designated as Hedging Instrument [Member] | Provisional Pricing Arrangements [Member] | Accounts Receivable [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Description of Location of Foreign Currency Derivatives on Balance Sheet | Accountsreceivable | Accountsreceivable |
| Derivative asset, fair value | 83.8 | |
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Not Designated as Hedging Instrument [Member] | Provisional Pricing Arrangements [Member] | Other Current Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||
| Description of Location of Foreign Currency Derivatives on Balance Sheet | Othercurrentliabilities | Othercurrentliabilities |
| Derivative liability, fair value | 1.1 | 19.5 |