Investment and Other Income (Details) (CAD) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Investment and Other Income
Proceeds from asset sales	6	54	20	60
Book value of assets sold	6	12	14	14
Gain/(loss) on asset sales, before tax		42	6	46
Gain/(loss) on asset sales, after tax		36	4	40