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Goodwill and Intangible Assets India Triggering Event (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2016
Dec. 31, 2017
Dec. 31, 2016
Oct. 11, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]          
Goodwill   $ 8,405.5 $ 8,250.1 $ 6,415.6 $ 1,983.3
International          
Finite-Lived Intangible Assets [Line Items]          
Tangible Asset Impairment Charges $ 11.0        
Goodwill and Intangible Asset Impairment $ 19.8        
Goodwill   6.9 $ 6.4   $ 23.2
Current Assets [Member] | International          
Finite-Lived Intangible Assets [Line Items]          
Assets at Risk for Future Impairment   $ 3.0