Annual report pursuant to Section 13 and 15(d)

Fair Value Of Financial Instruments (Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis) (Details)

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Fair Value Of Financial Instruments (Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Assets:    
Cash equivalents $ 351.2 $ 1,307.2
Derivative assets 157.9 45.6
U.S. marketable securities   22.0
International marketable securities 27.1 63.9
Foreign exchange contracts, assets 8.0 39.0
Total Assets 544.2 1,477.7
Foreign exchange contracts, liabilities 3.5  
Derivative Liabilities 19.5  
Total Liabilities 23.0  
Quoted Prices In Active Markets For Identical Assets/Liabilities (Level 1) [Member]
    
Assets:    
Cash equivalents 351.2 1,307.2
U.S. marketable securities   22.0
International marketable securities 27.1 63.9
Total Assets 378.3 1,393.1
Significant Other Observable Inputs (Level 2) [Member]
    
Assets:    
Foreign exchange contracts, assets 8.0 39.0
Total Assets 8.0 39.0
Foreign exchange contracts, liabilities 3.5  
Total Liabilities 3.5  
Significant Unobservable Inputs (Level 3) [Member]
    
Assets:    
Derivative assets 157.9 45.6
Total Assets 157.9 45.6
Derivative Liabilities 19.5  
Total Liabilities $ 19.5