Derivatives (Details)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2015
Derivatives designated as hedging instruments
Fair value hedges
Commodity contracts
2015
USD ($)
bbl
Mar. 31, 2015
Derivatives not designated as hedging instruments
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Commodity contracts
Long
2015
USD ($)
bbl
Mar. 31, 2015
Derivatives not designated as hedging instruments
Commodity contracts
Long
2016
USD ($)
bbl
Mar. 31, 2015
Derivatives not designated as hedging instruments
Commodity contracts
Long
2017
USD ($)
bbl
Mar. 31, 2015
Derivatives not designated as hedging instruments
Commodity contracts
Short
2015
USD ($)
bbl
Mar. 31, 2015
Derivatives not designated as hedging instruments
Commodity contracts
Short
2016
USD ($)
bbl
Mar. 31, 2015
Derivatives not designated as hedging instruments
Commodity contracts
Short
2017
USD ($)
bbl
Mar. 31, 2015
Derivatives not designated as hedging instruments
Commodity contracts
Short
2018
USD ($)
bbl
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
AUD
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
AUD
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
AUD
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
CAD
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
CAD
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
CAD
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
DKK
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
DKK
CLP
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
DKK
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
EUR
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
EUR
EUR (€)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
EUR
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
GBP
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
GBP
GBP (£)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
GBP
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
MXN
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
MXN
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
MXN
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
RON
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
RON
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
RON
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
ZAR
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
ZAR
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2015
ZAR
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2016
GBP
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2016
GBP
GBP (£)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2016
GBP
Weighted Average
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2017
GBP
USD ($)
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2017
GBP
NOK
Mar. 31, 2015
Derivatives not designated as hedging instruments
Foreign currency contracts
2017
GBP
Weighted Average
USD ($)
Derivative instruments, at their respective fair value positions                                                                              
Notional value of commodity contracts 4,400,000   44,100,000 6,800,000 200,000 34,900,000 4,300,000 200,000 100,000                                                            
Non-Designated, Notional amount of foreign currency contracts                     0.5     27.9     15.7     € 25.1     £ 59.7     123.8     35.3     53.8     £ 21.7     1.4  
Weighted Average Fixed Price 56.203   54.721 49.795 39.786 70.043 69.663 42.019 83.997                                                            
Weighted Average Fixed Price                       0.784     1.239     6.664     1.136     1.545     15.004     3.943     11.935     1.554     1.610
Weighted Average Mark-to-Market 1.500   (9.880) (5.382) (5.000) 13.169 5.512 6.000 3.000                                                            
Weighted Average Mark-to-Market                   0.200     0.061     0.006     0.124     0.090     (0.002)     0.017     0.002     0.065     0.143    
Fair Value Amount $ 6.6 $ 24.0 $ (435.7) $ (36.6) $ (1.0) $ 459.6 $ 23.7 $ 1.2 $ 0.3 $ 0.1     $ 1.7     $ 0.1     $ 3.1     $ 5.4     $ (0.2)     $ 0.6     $ 0.1     $ 1.4     $ 0.2