v3.3.1.900
Derivative Instruments (Fair Values of Derivative Assets and Liabilities) (Schedule and Footnotes) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Assets:      
Current $ 446.6 $ 252.1  
Long-term 1,314.8 952.1  
Total 1,761.4 1,204.2  
Liability:      
Current 1,043.7 751.2  
Long-term 1,517.1 2,305.3  
Total 2,560.8 3,056.5  
Cross Currency Interest Rate Contract [Member]      
Assets:      
Current 443.6 248.4  
Long-term 913.7 520.8  
Total 1,357.3 769.2  
Liability:      
Current 1,027.4 727.2  
Long-term 1,443.9 2,191.4  
Total 2,471.3 2,918.6  
Valuation adjustment in asset cross currency and interest rate derivative contracts 30.9 9.8  
Valuation adjustment in liability cross currency and interest rate derivative contracts 64.6 173.0  
Gain (loss) on change in credit risk valuation included in realized and unrealized gains (losses) on derivative instruments, net (120.9) 15.3 $ (57.3)
Equity-related derivative instruments [Member]      
Assets:      
Current 0.0 0.0  
Long-term 400.2 430.4  
Total 400.2 430.4  
Liability:      
Current 15.3 15.6  
Long-term 73.1 101.3  
Total 88.4 116.9  
Foreign currency forward contracts [Member]      
Assets:      
Current 2.5 2.6  
Long-term 0.0 0.0  
Total 2.5 2.6  
Liability:      
Current 0.8 8.2  
Long-term 0.0 12.0  
Total 0.8 20.2  
Other Contract [Member]      
Assets:      
Current 0.5 1.1  
Long-term 0.9 0.9  
Total 1.4 2.0  
Liability:      
Current 0.2 0.2  
Long-term 0.1 0.6  
Total $ 0.3 $ 0.8