Fortune Creek (Details) (KKR [Member]) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013 USD ($) Y	Sep. 30, 2013 CAD
Minimum Expenditures Required to Acquire Productive Assets	$ 300
Minimum capital expenditures	170.9
Expenditures Required to Acquire Productive Assets Within the Next Twelve Months	9.1
Expenditures Required to Acquire Productive Assets That Could Be Deferred Past 2014	20
Dedicated years for gas production	10	10
Payments to acquire interest in joint venture	125
Percentage of interest by parent in the partnership	50.00%	50.00%
Maximum construction project contributions		130