Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
U.S. statutory rate	21.00%	35.00%
Operating loss carryforwards	$ 0	$ 0
Foreign tax credit carryforwards	0
Valuation allowance	228,200,000
Repatriation tax payable	36,000,000
Decrease in income tax expense	$ 156,000,000
Repatriation tax payment period	8 years
United States [Member]
Income Tax Disclosure [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2014
Canada [Member]
Income Tax Disclosure [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2012
Malaysia [Member]
Income Tax Disclosure [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2011
United Kingdom [Member]
Income Tax Disclosure [Line Items]
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions	2016
Scenario, Adjustment [Member]
Income Tax Disclosure [Line Items]
Deferred tax liabilities	$ (36,000,000)