UNAUDITED CONDENSED 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
Revenues
Investment advisory fees	$ 611.7	$ 492.0	$ 1,200.5	$ 963.8
Administrative fees	101.4	84.7	194.5	168.3
Investment income of savings bank subsidiary	1.4	1.6	2.7	3.3
Total revenues	714.5	578.3	1,397.7	1,135.4
Interest expense on savings bank deposits	0.8	0.9	1.6	1.8
Net revenues	713.7	577.4	1,396.1	1,133.6
Operating expenses
Compensation and related costs	248.8	215.1	491.7	422.8
Advertising and promotion	20.6	20.1	46.0	43.6
Depreciation and amortization of property and equipment	17.9	15.5	34.5	30.9
Occupancy and facility costs	28.9	25.8	56.6	51.5
Other operating expenses	70.9	47.8	129.2	93.0
Total operating expenses	387.1	324.3	758.0	641.8
Net operating income	326.6	253.1	638.1	491.8
Non-operating investment income	5.6	3.9	9.5	9.2
Income before income taxes	332.2	257.0	647.6	501.0
Provision for income taxes	127.5	98.5	248.3	189.5
Net income	$ 204.7	$ 158.5	$ 399.3	$ 311.5
Earnings per share on common stock
Basic (in dollars per share)	$ 0.79	$ 0.61	$ 1.54	$ 1.20
Diluted (in dollars per share)	$ 0.76	$ 0.59	$ 1.49	$ 1.17
Dividends declared per share (in dollars per share)	$ 0.31	$ 0.27	$ 0.62	$ 0.54