Derivatives - Fair Value Position (Details) - 9 months ended Sep. 30, 2016 € in Millions, ₩ in Millions, ₨ in Millions, ¥ in Millions, £ in Millions, bbl in Millions, ZAR in Millions, SGD in Millions, SFr in Millions, SEK in Millions, RON in Millions, PLN in Millions, NZD in Millions, NOK in Millions, MXN in Millions, DKK in Millions, COP in Millions, CLP in Millions, CAD in Millions, BRL in Millions, AUD in Millions, AED in Millions, $ in Millions	GBP (£) $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP bbl	USD ($) $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	JPY (¥) $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	PLN $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	SGD $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	AUD $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	CLP $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	ZAR $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	KRW (₩) $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	CAD $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	EUR (€) $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	AED $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	NOK $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	COP $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	BRL $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	DKK $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	RON $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	MXN $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	INR (₨) $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	SEK $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	NZD $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP	CHF (SFr) $ / bbl $ / MXN $ / AED $ / € $ / PLN $ / ¥ $ / CAD $ / SGD $ / £ $ / ₨ $ / NOK $ / ₩ $ / NZD $ / COP $ / SEK $ / ZAR $ / SFr $ / DKK $ / RON $ / AUD $ / CLP
Derivatives designated as hedging instruments | Fair value hedges | Commodity contracts for inventory hedging
Derivative instruments, at their respective fair value positions
Fair Value Amount		$ (7.8)
Derivatives designated as hedging instruments | Fair value hedges | Commodity contracts for inventory hedging | 2016
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	2.2
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523	58.523
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)	(3.491)
Fair Value Amount		$ (7.8)
Derivatives designated as hedging instruments | Fair value hedges | Commodity contracts for firm commitment hedging
Derivative instruments, at their respective fair value positions
Fair Value Amount		$ 5.5
Derivatives designated as hedging instruments | Fair value hedges | Commodity contracts for firm commitment hedging | 2016
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.3
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448	57.448
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489	7.489
Fair Value Amount		$ 1.9
Derivatives designated as hedging instruments | Fair value hedges | Commodity contracts for firm commitment hedging | 2017
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.5
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095	59.095
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346	7.346
Fair Value Amount		$ 3.6
Derivatives designated as hedging instruments | Cash flow hedges | Commodity contracts for inventory hedging
Derivative instruments, at their respective fair value positions
Fair Value Amount		$ (14.3)
Derivatives designated as hedging instruments | Cash flow hedges | Commodity contracts for inventory hedging | 2016
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	6.7
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523	52.523
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)	(0.480)
Fair Value Amount		$ (3.2)
Derivatives designated as hedging instruments | Cash flow hedges | Commodity contracts for inventory hedging | 2017
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	1.6
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604	59.604
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)	(6.731)
Fair Value Amount		$ (11.0)
Derivatives not designated as hedging instruments
Derivative instruments, at their respective fair value positions
Fair Value Amount		$ 9.0
Derivatives not designated as hedging instruments | Commodity contracts | Long | 2016
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	33.4
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940	34.940
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)	(3.061)
Fair Value Amount		$ (102.3)
Derivatives not designated as hedging instruments | Commodity contracts | Long | 2017
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	26.8
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038	29.038
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151	2.151
Fair Value Amount		$ 57.6
Derivatives not designated as hedging instruments | Commodity contracts | Long | 2018
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	5.1
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332	18.332
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427	1.427
Fair Value Amount		$ 7.3
Derivatives not designated as hedging instruments | Commodity contracts | Long | 2019
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.8
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327	17.327
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299	0.299
Fair Value Amount		$ 0.2
Derivatives not designated as hedging instruments | Commodity contracts | Long | 2020
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.4
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226	32.226
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285	0.285
Fair Value Amount		$ 0.1
Derivatives not designated as hedging instruments | Commodity contracts | Long | 2021
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.7
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987	18.987
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320	1.320
Fair Value Amount		$ 1.0
Derivatives not designated as hedging instruments | Commodity contracts | Long | 2022
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.7
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634	1.634
Fair Value Amount		$ 1.2
Derivatives not designated as hedging instruments | Commodity contracts | Long | 2023
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.7
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973	1.973
Fair Value Amount		$ 1.5
Derivatives not designated as hedging instruments | Commodity contracts | Short | 2016
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	33.7
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464	34.464
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726	2.726
Fair Value Amount		$ 92.0
Derivatives not designated as hedging instruments | Commodity contracts | Short | 2017
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	23.0
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297	33.297
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)	(2.109)
Fair Value Amount		$ (48.5)
Derivatives not designated as hedging instruments | Commodity contracts | Short | 2018
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	4.3
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216	19.216
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)	(0.806)
Fair Value Amount		$ (3.4)
Derivatives not designated as hedging instruments | Commodity contracts | Short | 2019
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.6
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329	25.329
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614	0.614
Fair Value Amount		$ 0.4
Derivatives not designated as hedging instruments | Commodity contracts | Short | 2020
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.5
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724	28.724
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909	0.909
Fair Value Amount		$ 0.4
Derivatives not designated as hedging instruments | Commodity contracts | Short | 2021
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.8
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155	17.155
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)	(1.129)
Fair Value Amount		$ (1.0)
Derivatives not designated as hedging instruments | Commodity contracts | Short | 2022
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.8
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006	18.006
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)	(1.404)
Fair Value Amount		$ (1.2)
Derivatives not designated as hedging instruments | Commodity contracts | Short | 2023
Derivative instruments, at their respective fair value positions
Notional value of commodity contracts (in barrels) | bbl	0.8
Weighted Average Fixed Price of commodity contracts (in usd per barrel) | $ / bbl	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916	18.916
Weighted Average Mark-to-Market of commodity contracts (in usd per barrel) | $ / bbl	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)	(1.701)
Fair Value Amount		$ (1.4)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | AED
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | AED												AED 8.0
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | AED | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / AED	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676	3.676
Weighted Average Mark-to-Market of foreign currency contracts | $ / AED	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | AUD
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | AUD						AUD 8.3
Fair Value Amount		$ (0.2)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | AUD | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / AUD	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752	0.752
Weighted Average Mark-to-Market of foreign currency contracts | $ / AUD	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)	(0.024)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | BRL
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | BRL															BRL 0.3
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | BRL | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / €	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308	3.308
Weighted Average Mark-to-Market of foreign currency contracts | $ / €	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | CAD
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | CAD										CAD 76.4
Fair Value Amount		$ 0.2
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | CAD | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / CAD	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304	1.304
Weighted Average Mark-to-Market of foreign currency contracts | $ / CAD	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | CHF
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | SFr																						SFr 0.8
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | CHF | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / SFr	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970	0.970
Weighted Average Mark-to-Market of foreign currency contracts | $ / SFr	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)	(0.009)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | CLP
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | CLP							CLP 3,098.0
Fair Value Amount		$ (0.1)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | CLP | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / CLP	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565	665.565
Weighted Average Mark-to-Market of foreign currency contracts | $ / CLP	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | COP
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | COP														COP 60,727.0
Fair Value Amount		$ (0.3)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | COP | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / COP	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994	2,979.994
Weighted Average Mark-to-Market of foreign currency contracts | $ / COP	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | DKK
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | DKK																DKK 111.2
Fair Value Amount		$ (0.1)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | DKK | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / DKK	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651	6.651
Weighted Average Mark-to-Market of foreign currency contracts | $ / DKK	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | EUR
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | €											€ 95.6
Fair Value Amount		$ (0.6)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | EUR | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / €	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120	1.120
Weighted Average Mark-to-Market of foreign currency contracts | $ / €	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)	(0.006)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | GBP
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | £	£ 139.1
Fair Value Amount		$ 3.4
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | GBP | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / £	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342	1.342
Weighted Average Mark-to-Market of foreign currency contracts | $ / £	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | INR
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | ₨																			₨ 97.0
Fair Value Amount		$ (0.1)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | INR | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / ₨	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091	68.091
Weighted Average Mark-to-Market of foreign currency contracts | $ / ₨	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | JPY
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | ¥			¥ 402.7
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | JPY | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / ¥	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369	102.369
Weighted Average Mark-to-Market of foreign currency contracts | $ / ¥	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | KRW
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | ₩									₩ 6,050.0
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | KRW | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / ₩	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520	1,099.520
Weighted Average Mark-to-Market of foreign currency contracts | $ / ₩	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | MXN
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | MXN																		MXN 2,975.6
Fair Value Amount		$ (0.2)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | MXN | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / MXN	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876	18.876
Weighted Average Mark-to-Market of foreign currency contracts | $ / MXN	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | NOK
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | NOK													NOK 117.8
Fair Value Amount		$ (0.4)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | NOK | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / NOK	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297	8.297
Weighted Average Mark-to-Market of foreign currency contracts | $ / NOK	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | NZD
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | NZD																					NZD 4.7
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | NZD | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / NZD	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723	0.723
Weighted Average Mark-to-Market of foreign currency contracts | $ / NZD	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)	(0.010)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | PLN
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | PLN				PLN 24.8
Fair Value Amount		$ (0.1)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | PLN | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / PLN	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875	3.875
Weighted Average Mark-to-Market of foreign currency contracts | $ / PLN	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)	(0.003)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | RON
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | RON																	RON 13.7
Fair Value Amount		$ (0.1)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | RON | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / RON	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011	4.011
Weighted Average Mark-to-Market of foreign currency contracts | $ / RON	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)	(0.004)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | SEK
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | SEK																				SEK 58.2
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | SEK | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / SEK	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528	8.528
Weighted Average Mark-to-Market of foreign currency contracts | $ / SEK	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | SGD
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | SGD					SGD 40.7
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | SGD | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / SGD	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353	1.353
Weighted Average Mark-to-Market of foreign currency contracts | $ / SGD	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)	(0.001)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | ZAR
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | ZAR								ZAR 81.3
Fair Value Amount		$ 0.2
Derivatives not designated as hedging instruments | Foreign currency contracts | 2016 | ZAR | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / ZAR	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720	14.720
Weighted Average Mark-to-Market of foreign currency contracts | $ / ZAR	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002
Derivatives not designated as hedging instruments | Foreign currency contracts | 2017 | EUR
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | €											€ 4.7
Fair Value Amount		$ (0.2)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2017 | EUR | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / €	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148	1.148
Weighted Average Mark-to-Market of foreign currency contracts | $ / €	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)	(0.039)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2017 | GBP
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | £	£ 23.4
Fair Value Amount		$ 3.3
Derivatives not designated as hedging instruments | Foreign currency contracts | 2017 | GBP | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / £	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425	1.425
Weighted Average Mark-to-Market of foreign currency contracts | $ / £	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143	0.143
Derivatives not designated as hedging instruments | Foreign currency contracts | 2017 | SEK
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | SEK																				SEK 25.2
Fair Value Amount		$ 0.2
Derivatives not designated as hedging instruments | Foreign currency contracts | 2017 | SEK | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / SEK	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301	8.301
Weighted Average Mark-to-Market of foreign currency contracts | $ / SEK	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007
Derivatives not designated as hedging instruments | Foreign currency contracts | 2018 | EUR
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | €											€ 1.7
Fair Value Amount		$ (0.1)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2018 | EUR | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / €	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105	1.105
Weighted Average Mark-to-Market of foreign currency contracts | $ / €	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)	(0.041)
Derivatives not designated as hedging instruments | Foreign currency contracts | 2018 | GBP
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | £	£ 1.4
Fair Value Amount		$ 0.1
Derivatives not designated as hedging instruments | Foreign currency contracts | 2018 | GBP | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / £	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361	1.361
Weighted Average Mark-to-Market of foreign currency contracts | $ / £	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060	0.060
Derivatives not designated as hedging instruments | Foreign currency contracts | 2018 | SEK
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | SEK																				SEK 16.9
Fair Value Amount		$ 0.2
Derivatives not designated as hedging instruments | Foreign currency contracts | 2018 | SEK | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / SEK	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149	8.149
Weighted Average Mark-to-Market of foreign currency contracts | $ / SEK	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010	0.010
Derivatives not designated as hedging instruments | Foreign currency contracts | 2019 | GBP
Derivative instruments, at their respective fair value positions
Non-Designated, Notional amount of foreign currency contracts | £	£ 0.6
Fair Value Amount		$ 0.0
Derivatives not designated as hedging instruments | Foreign currency contracts | 2019 | GBP | Weighted Average
Derivative instruments, at their respective fair value positions
Weighted Average Fixed Price of foreign currency contracts | $ / £	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401	1.401
Weighted Average Mark-to-Market of foreign currency contracts | $ / £	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086	0.086