Consolidated Statements Of Income (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements Of Income
Revenue	$ 2,928	$ 2,606	$ 5,812	$ 5,241
Expense:
Compensation and benefits	1,728	1,614	3,449	3,189
Other operating expenses	735	1,042	1,426	1,677
Operating expenses	2,463	2,656	4,875	4,866
Operating income (loss)	465	(50)	937	375
Interest income	5	3	12	7
Interest expense	(49)	(60)	(100)	(120)
Investment income (loss)	(6)	18	13	26
Income (loss) before income taxes	415	(89)	862	288
Income tax expense (credit)	129	(60)	257	43
Income (loss) from continuing operations	286	(29)	605	245
Discontinued operations, net of tax	3	271	15	249
Net income before non-controlling interest	289	242	620	494
Less: Net income attributable to non-controlling interests	7	6	13	10
Net income attributable to the Company	$ 282	$ 236	$ 607	$ 484
Basic net income (loss) per share
- Continuing operations	$ 0.51	$ (0.06)	$ 1.08	$ 0.43
- Net income attributable to the Company	$ 0.51	$ 0.43	$ 1.10	$ 0.89
Diluted net income (loss) per share
- Continuing operations	$ 0.50	$ (0.06)	$ 1.06	$ 0.43
- Net income attributable to the Company	$ 0.50	$ 0.43	$ 1.09	$ 0.88
Weighted average number of shares outstanding
- Basic	547	541	545	537
- Diluted	555	545	554	541
Shares outstanding at June 30,	541	542	541	542