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Supplemental Financial Information (Accrued Liabilities And Other) (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Supplemental Financial Information [Abstract]    
Personnel costs $ 161.6 $ 214.0
Deferred revenue 197.2 241.3
Taxes 70.8 94.5
Accrued interest 88.4 83.8
Derivative Liability 21.6 24.1
Other 11.3 36.4
Accrued liabilities and other $ 550.9 $ 694.1