Derivative Instruments - Balance Sheet Location (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	$ 261.1	$ 845.8
Gross Derivative Liabilities	266.6	769.1
Commodity contracts
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	259.0	841.2
Gross Derivative Liabilities	255.0	767.9
Foreign currency contracts
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	2.0	4.6
Gross Derivative Liabilities	11.6	1.2
Derivatives designated as hedging instruments | Commodity contracts
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	1.7	188.2
Gross Derivative Liabilities	20.0	132.2
Derivatives designated as hedging instruments | Commodity contracts | Short-term derivative assets, net
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	0.0	168.5
Gross Derivative Liabilities	0.0	122.5
Derivatives designated as hedging instruments | Commodity contracts | Identifiable intangible and other non-current assets
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	0.0	19.7
Gross Derivative Liabilities	0.0	9.6
Derivatives designated as hedging instruments | Commodity contracts | Accrued expenses and other current liabilities
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	1.7	0.1
Gross Derivative Liabilities	20.0	0.0
Derivatives not designated as hedging instruments
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	259.4	657.5
Gross Derivative Liabilities	246.6	637.0
Derivatives not designated as hedging instruments | Commodity contracts
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	257.3	652.9
Gross Derivative Liabilities	235.0	635.8
Derivatives not designated as hedging instruments | Commodity contracts | Short-term derivative assets, net
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	65.7	537.6
Gross Derivative Liabilities	7.2	429.0
Derivatives not designated as hedging instruments | Commodity contracts | Identifiable intangible and other non-current assets
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	23.0	71.7
Gross Derivative Liabilities	4.8	40.0
Derivatives not designated as hedging instruments | Commodity contracts | Accrued expenses and other current liabilities
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	161.0	30.7
Gross Derivative Liabilities	203.4	126.4
Derivatives not designated as hedging instruments | Commodity contracts | Other long-term liabilities
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	7.7	12.9
Gross Derivative Liabilities	19.7	40.4
Derivatives not designated as hedging instruments | Foreign currency contracts
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	2.0	4.6
Gross Derivative Liabilities	11.6	1.2
Derivatives not designated as hedging instruments | Foreign currency contracts | Short-term derivative assets, net
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	1.2	4.4
Gross Derivative Liabilities	0.2	0.8
Derivatives not designated as hedging instruments | Foreign currency contracts | Identifiable intangible and other non-current assets
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	0.0	0.1
Gross Derivative Liabilities	0.0	0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | Accrued expenses and other current liabilities
Information about derivative instruments measured at fair value and their locations on the consolidated balance sheet
Gross Derivative Assets	0.9	0.1
Gross Derivative Liabilities	$ 11.4	$ 0.4