Financial Instruments and Fair Value Measurement Accumulated Derivative Instruments (Loss) Gain (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2012
Cumulative Changes in Derivative Net Gain (Loss) [Roll Forward]
Balance at beginning of period	$ (4.7)
Reclassification to earnings	6.4
Current period change in fair value	(6.6)
Balance at end of period	(4.9)
Anticipated reclassification to earnings in the next twelve months	$ 0.9

Before tax amount of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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