Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue	$ 2,932	$ 2,845	$ 9,146	$ 8,922
Expense:
Compensation and benefits	1,824	1,760	5,393	5,332
Other operating expenses	704	707	2,165	2,167
Operating expenses	2,528	2,467	7,558	7,499
Operating income	404	378	1,588	1,423
Interest income	5	6	13	18
Interest expense	(40)	(44)	(124)	(135)
Investment income	14	(4)	58	20
Income before income taxes	383	336	1,535	1,326
Income tax expense	123	90	463	387
Income from continuing operations	260	246	1,072	939
Discontinued operations, net of tax	(1)	1	6	(1)
Net income before non-controlling interests	259	247	1,078	938
Less: Net income attributable to non-controlling interests	6	6	24	21
Net income attributable to the Company	$ 253	$ 241	$ 1,054	$ 917
Basic net income per share
- Continuing operations	$ 0.46	$ 0.44	$ 1.91	$ 1.68
– Net income attributable to the Company	$ 0.46	$ 0.44	$ 1.92	$ 1.68
Diluted net income per share
- Continuing operations	$ 0.45	$ 0.43	$ 1.88	$ 1.66
– Net income attributable to the Company	$ 0.45	$ 0.44	$ 1.89	$ 1.66
Average number of shares outstanding
- Basic (in shares)	549	544	549	544
- Diluted (in shares)	558	552	558	552
Shares outstanding at September 30	547	544	547	544