Summary of Short-Term Borrowings and Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Short-term borrowings
Commercial paper issuances	$ 123.0	$ 143.3
Various debt due to international banks	0.6	3.4
Total short-term borrowings	123.6	146.7
Long-term debt
Fair value adjustment related to hedged fixed rate debt instrument	0.6	(0.9)
Total long-term debt	950.1	948.5
Less: current maturities	(250.0)	(249.9)
Long-term Debt	700.1	698.6
2.875% Senior notes due October 1, 2022
Long-term debt
Senior notes	400.0	400.0
Less: Discount	(0.3)	(0.3)
3.35% Senior notes due December 15, 2015
Long-term debt
Senior notes	250.0	250.0
Less: Discount	0.0	(0.1)
2.45% Senior notes due December 15, 2019
Long-term debt
Senior notes	300.0	300.0
Less: Discount	$ (0.2)	$ (0.2)