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Segment Information (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 Channel Segment | Mar. 31, 2013 | Dec. 31, 2013
Segment Reporting [Abstract] |  |  |
Number of operating segments | 3 |  |
Number of principal distribution channels | 3 |  |
Statements of Income |  |  |
Revenue | $ 593.1 | $ 502.2 |
Operating expenses: |  |  |
Depreciation, intangible amortization and impairments | 31.2 | 36.4 |
Other operating expenses | 367.9 | 315.3 |
Total operating expenses | 399.1 | 351.7 |
Operating income | 194.0 | 150.5 |
Income from equity method investments | 46.2 | 50.6 |
Other non-operating (income) and expenses: |  |  |
Investment and other income | (8.2) | (4.5) |
Interest expense | 17.6 | 24.2 |
Imputed interest expense and contingent payment arrangements | 22.5 | 14.2 |
Total non-operating (income) and expenses | 31.9 | 33.9 |
Income before income taxes | 208.3 | 167.2 |
Income taxes | 48.9 | 37.5 |
Net income | 159.4 | 129.7 |
Net income (non-controlling interests) | (82.2) | (67.3) |
Net income (controlling interest) | 77.2 | 62.4 |
Balance Sheet Information |  |  |
Total assets | 6,620.9 |  | 6,318.8
Institutional [Member] |  |  |
Statements of Income |  |  |
Revenue | 244.9 | 223.8 |
Operating expenses: |  |  |
Depreciation, intangible amortization and impairments | 23.3 | 19.6 |
Other operating expenses | 154.9 | 140.6 |
Total operating expenses | 178.2 | 160.2 |
Operating income | 66.7 | 63.6 |
Income from equity method investments | 37.0 | 44.4 |
Other non-operating (income) and expenses: |  |  |
Investment and other income | (5.5) | (2.4) |
Interest expense | 9.0 | 14.4 |
Imputed interest expense and contingent payment arrangements | 10.3 | 4.4 |
Total non-operating (income) and expenses | 13.8 | 16.4 |
Income before income taxes | 89.9 | 91.6 |
Income taxes | 21.9 | 22.1 |
Net income | 68.0 | 69.5 |
Net income (non-controlling interests) | (32.1) | (30.8) |
Net income (controlling interest) | 35.9 | 38.7 |
Balance Sheet Information |  |  |
Total assets | 3,123.2 |  | 3,196.5
Mutual Fund [Member] |  |  |
Statements of Income |  |  |
Revenue | 291.9 | 227.6 |
Operating expenses: |  |  |
Depreciation, intangible amortization and impairments | 4.0 | 13.6 |
Other operating expenses | 181.4 | 145.3 |
Total operating expenses | 185.4 | 158.9 |
Operating income | 106.5 | 68.7 |
Income from equity method investments | 5.6 | 3.8 |
Other non-operating (income) and expenses: |  |  |
Investment and other income | (2.4) | (1.9) |
Interest expense | 6.9 | 7.6 |
Imputed interest expense and contingent payment arrangements | 10.3 | 9.2 |
Total non-operating (income) and expenses | 14.8 | 14.9 |
Income before income taxes | 97.3 | 57.6 |
Income taxes | 22.7 | 11.7 |
Net income | 74.6 | 45.9 |
Net income (non-controlling interests) | (40.5) | (28.7) |
Net income (controlling interest) | 34.1 | 17.2 |
Balance Sheet Information |  |  |
Total assets | 2,774.8 |  | 2,448.4
High Net Worth [Member] |  |  |
Statements of Income |  |  |
Revenue | 56.3 | 50.8 |
Operating expenses: |  |  |
Depreciation, intangible amortization and impairments | 3.9 | 3.2 |
Other operating expenses | 31.6 | 29.4 |
Total operating expenses | 35.5 | 32.6 |
Operating income | 20.8 | 18.2 |
Income from equity method investments | 3.6 | 2.4 |
Other non-operating (income) and expenses: |  |  |
Investment and other income | (0.3) | (0.2) |
Interest expense | 1.7 | 2.2 |
Imputed interest expense and contingent payment arrangements | 1.9 | 0.6 |
Total non-operating (income) and expenses | 3.3 | 2.6 |
Income before income taxes | 21.1 | 18.0 |
Income taxes | 4.3 | 3.7 |
Net income | 16.8 | 14.3 |
Net income (non-controlling interests) | (9.6) | (7.8) |
Net income (controlling interest) | 7.2 | 6.5 |
Balance Sheet Information |  |  |
Total assets | $ 722.9 |  | $ 673.9

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