Income Taxes - Local and Foreign Subsidiaries Tax Examination (Details)	12 Months Ended
	Dec. 31, 2015
United States
Income Tax Examination [Line Items]
Earliest years remaining open to examinations	2011
United Kingdom
Income Tax Examination [Line Items]
Earliest years remaining open to examinations	2012
Canada
Income Tax Examination [Line Items]
Earliest years remaining open to examinations	2010
France
Income Tax Examination [Line Items]
Earliest years remaining open to examinations	2013
Germany
Income Tax Examination [Line Items]
Earliest years remaining open to examinations	2012
Norway
Income Tax Examination [Line Items]
Earliest years remaining open to examinations	2013
Singapore
Income Tax Examination [Line Items]
Earliest years remaining open to examinations	2012
Italy
Income Tax Examination [Line Items]
Earliest years remaining open to examinations	2011