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Short-Term Debt - Interest Expense on Short Term Margin Loans (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Notes to Financial Statements
Interest expense UBS short-term credit line	$ 13	$ 13	$ 24	$ 23
Interest expense RBC short-term margin loan	11	6	15	21
Total interest expense, short term margin loans	$ 24	$ 19	$ 39	$ 44