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Short Term Debt - Short Term Debt Duration (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Debt Disclosure [Abstract]
Interest expense UBS short-term credit line	$ 5	$ 13	$ 24	$ 36
Interest expense RBC short-term margin loan	7		15	21
Total interest expense, short term margin loans	$ 12	$ 13	$ 39	$ 57