Schedule of New Accounting Pronouncements (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Consolidated Balance Sheets
Short-term Debt	$ 350.7	$ 352.0
Long-term Debt	3,042.6	2,449.4
Other Assets	$ 624.8	637.4
Previously Reported Amount
Consolidated Balance Sheets
Short-term Debt		352.4
Long-term Debt		2,475.1
Other Assets		663.5
Accounting Standards Update 2015-03 [Member] | Restatement Adjustment
Consolidated Balance Sheets
Short-term Debt		(0.4)
Long-term Debt		(25.7)
Other Assets		$ (26.1)