New Accounting Pronouncements (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other current assets, net	$ 89.8	$ 101.4
Other assets	208.0	189.2
Current portion of long-term debt and short-term borrowings	48.2	849.0
Long-term debt	$ 2,953.9	2,321.3
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other current assets, net		103.2
Other assets		203.6
Current portion of long-term debt and short-term borrowings		849.4
Long-term debt		$ 2,337.1