Related Party Transactions (Details 2) (HSBC Bank USA [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
HSBC Bank USA [Member]
Fees received and paid
Fees received	$ 1	$ 1	$ 3	$ 3
Fees paid	$ 1	$ 2	$ 3	$ 4