Derivatives and Fair Value Measurements (Details 2) - Net amounts presented in the condensed consolidated balance sheet [Member] - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative liabilities, current	[1]	$ 272.1	$ 341.1
Derivative liabilities, noncurrent	[1]	128.1	236.0
Commodity swap contracts [Member]
Derivative [Line Items]
Derivative liabilities, current	[1]	68.4	100.1
Derivative liabilities, noncurrent	[1]	38.3	67.0
Foreign currency forward contract [Member]
Derivative [Line Items]
Derivative liabilities, current	[1]	203.7	241.0
Derivative liabilities, noncurrent	[1]	$ 89.8	$ 169.0

[1] All commodity swap contracts and foreign currency forward contracts were in a liability position as of September 30, 2015 and December 31, 2014.