Discontinued Operations (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Discontinued operations components of earnings and balance sheet disclosure
Income (loss) from discontinued operations, net of tax	$ 2	$ (2)	$ (73)	$ 2
Discontinued operations
Discontinued operations components of earnings and balance sheet disclosure
Total net revenues	102	116	342	346
Pretax income (loss)	2	(4)	(117)	3
Income tax provision (benefit)		(2)	(44)	1
Income (loss) from discontinued operations, net of tax	2	(2)	(73)	2
Assets:
Cash and cash equivalents	29		29		23
Receivables	42		42		40
Other assets	94		94		110
Total assets held for sale	165		165		173
Liabilities:
Long-term debt	5		5		5
Accounts payable and accrued expenses	24		24		26
Other liabilities	31		31		48
Total liabilities held for sale	$ 60		$ 60		$ 79