Employee Retirement Plans (Details Textual) (USD $) In Millions, unless otherwise specified		6 Months Ended	3 Months Ended
	Jun. 30, 2014 Pension [Member]	Jun. 30, 2014 Canada [Member]	Sep. 30, 2014 Subsequent Event [Member] United States Pension Plan of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated employer contributions in current fiscal year	$ 61
Contribution by employer		$ 8	$ 50