Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
U.S. statutory rate		21.00%	35.00%
Operating loss carryforwards		$ 0	$ 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)