Other Operational Expenses (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other operational expenses	$ 6.0
Oil and gas, subsidy charges	13.6
Loss on contract termination	20.0
Foreign Currency Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other operational expenses	$ 6.0