|
Acquisitions (Details) (USD $)
In Millions, unless otherwise specified
|
3 Months Ended |
6 Months Ended |
|
Apr. 30, 2013
|
Apr. 30, 2013
|
|
Clifton Group [Member]
|
|
|
| Business Acquisition Purchase Price Allocation [Line Items] |
|
|
| Business acquisition cost of acquired entity cash paid |
$ 72.3 |
$ 72.3 |
| Business acquisition cost of acquired entity other noncash consideration |
12.8 |
12.8 |
| Business acquisition purchase price allocation amortizable intangible assets |
24.5 |
24.5 |
| Business acquisition purchase price allocation goodwill amount |
60.1 |
60.1 |
| Business acquisition revenues |
6.3 |
8.4 |
| Business acquisition earnings |
1.7 |
2.2 |
| Finite-Lived Intangible Assets, Weighted-Average Useful Life |
|
18 years |
|
Parametric Portfolio Associates [Member]
|
|
|
| Business Acquisition Contingent Consideration [Line Items] |
|
|
| Minority interest ownership percentage purchased by parent |
3.40% |
3.40% |
| Company's increase in profit interest percentage, during the period |
5.70% |
5.70% |
| Non-controlling interest holders profits interest, end of period |
4.90% |
4.90% |
| Profits interest granted to non-controlling interest holders |
0.76% |
0.76% |
| Company's profit interest percentage, end of period |
93.30% |
93.30% |
| Purchase of non-controlling interests |
|
43.5 |
| Company's capital ownership interest at the end of the period |
98.10% |
98.10% |
| Noncontrolling capital and profits interest issued in acquisition |
1.90% |
1.90% |
|
Tax Advantaged Bond Strategies [Member]
|
|
|
| Business Acquisition Contingent Consideration [Line Items] |
|
|
| Contingent payment made during the period |
14.1 |
14.1 |
| Goodwill acquired |
|
$ 14.1 |