Derivatives and Fair Value Measurements (Details 4) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Carrying amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value		$ 7,791.4	$ 6,241.2
Estimated fair value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value			1,373.7
Net amounts presented in the consolidated balance sheet
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability, Current	[1]		231.7
Derivative Liability, Noncurrent	[1]		92.7
Net amounts presented in the consolidated balance sheet | Commodity Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability, Current	[1]		86.1
Derivative Liability, Noncurrent	[1]		37.6
Net amounts presented in the consolidated balance sheet | Foreign Exchange Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability, Current	[1]		145.6
Derivative Liability, Noncurrent	[1]		$ 55.1

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