Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 29, 2016
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Percent		37.00%	18.00%
Effective income tax rate excluding Libya		36.00%	15.00%
Foreign Tax Authority [Member] | Alberta Government [Member]
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Provincial Corporate Tax Rate		12.00%		10.00%
Deferred Foreign Income Tax Expense (Benefit)	$ 135