Derivative Instruments - Gross Notional Values (Details) bbl in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) bbl
Long | Commodity contracts
Derivative [Line Items]
Notional value of commodity contracts | bbl	62.7
Long | Foreign currency contracts | AUD
Derivative [Line Items]
Notional amount of foreign currency contracts	$ 0.2
Long | Foreign currency contracts | CAD
Derivative [Line Items]
Notional amount of foreign currency contracts	51.9
Long | Foreign currency contracts | CHF
Derivative [Line Items]
Notional amount of foreign currency contracts	0.0
Long | Foreign currency contracts | CLP
Derivative [Line Items]
Notional amount of foreign currency contracts	1,769.6
Long | Foreign currency contracts | COP
Derivative [Line Items]
Notional amount of foreign currency contracts	27,753.2
Long | Foreign currency contracts | DKK
Derivative [Line Items]
Notional amount of foreign currency contracts	5.5
Long | Foreign currency contracts | EUR
Derivative [Line Items]
Notional amount of foreign currency contracts	5.0
Long | Foreign currency contracts | GBP
Derivative [Line Items]
Notional amount of foreign currency contracts	72.0
Long | Foreign currency contracts | INR
Derivative [Line Items]
Notional amount of foreign currency contracts	20.3
Long | Foreign currency contracts | JPY
Derivative [Line Items]
Notional amount of foreign currency contracts	1,167.9
Long | Foreign currency contracts | MXN
Derivative [Line Items]
Notional amount of foreign currency contracts	1,229.1
Long | Foreign currency contracts | NOK
Derivative [Line Items]
Notional amount of foreign currency contracts	9.6
Long | Foreign currency contracts | PLN
Derivative [Line Items]
Notional amount of foreign currency contracts	0.0
Long | Foreign currency contracts | SEK
Derivative [Line Items]
Notional amount of foreign currency contracts	36.7
Long | Foreign currency contracts | SGD
Derivative [Line Items]
Notional amount of foreign currency contracts	15.9
Long | Foreign currency contracts | ZAR
Derivative [Line Items]
Notional amount of foreign currency contracts	$ 16.4
Short | Commodity contracts
Derivative [Line Items]
Notional value of commodity contracts | bbl	66.7
Short | Foreign currency contracts | AUD
Derivative [Line Items]
Notional amount of foreign currency contracts	$ 5.2
Short | Foreign currency contracts | CAD
Derivative [Line Items]
Notional amount of foreign currency contracts	115.9
Short | Foreign currency contracts | CHF
Derivative [Line Items]
Notional amount of foreign currency contracts	0.6
Short | Foreign currency contracts | CLP
Derivative [Line Items]
Notional amount of foreign currency contracts	2,015.1
Short | Foreign currency contracts | COP
Derivative [Line Items]
Notional amount of foreign currency contracts	48,454.9
Short | Foreign currency contracts | DKK
Derivative [Line Items]
Notional amount of foreign currency contracts	135.7
Short | Foreign currency contracts | EUR
Derivative [Line Items]
Notional amount of foreign currency contracts	38.7
Short | Foreign currency contracts | GBP
Derivative [Line Items]
Notional amount of foreign currency contracts	81.4
Short | Foreign currency contracts | INR
Derivative [Line Items]
Notional amount of foreign currency contracts	92.7
Short | Foreign currency contracts | JPY
Derivative [Line Items]
Notional amount of foreign currency contracts	1,509.2
Short | Foreign currency contracts | KRW
Derivative [Line Items]
Notional amount of foreign currency contracts	11,735.9
Short | Foreign currency contracts | MXN
Derivative [Line Items]
Notional amount of foreign currency contracts	1,105.6
Short | Foreign currency contracts | NOK
Derivative [Line Items]
Notional amount of foreign currency contracts	43.8
Short | Foreign currency contracts | NZD
Derivative [Line Items]
Notional amount of foreign currency contracts	0.9
Short | Foreign currency contracts | PHP
Derivative [Line Items]
Notional amount of foreign currency contracts	8.0
Short | Foreign currency contracts | PLN
Derivative [Line Items]
Notional amount of foreign currency contracts	9.7
Short | Foreign currency contracts | RON
Derivative [Line Items]
Notional amount of foreign currency contracts	3.9
Short | Foreign currency contracts | SEK
Derivative [Line Items]
Notional amount of foreign currency contracts	6.4
Short | Foreign currency contracts | SGD
Derivative [Line Items]
Notional amount of foreign currency contracts	31.6
Short | Foreign currency contracts | ZAR
Derivative [Line Items]
Notional amount of foreign currency contracts	$ 15.4