Investment Securities (Investments In Private Equity Funds Subject to Lock-Up Periods) (Details) (Private equity funds, USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other long-term investments	$ 127.3
1-3 years
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other long-term investments	14.4
3-5 years
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other long-term investments	31.6
5-10 years
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other long-term investments	60.6
Greater than 10 years
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other long-term investments	$ 20.7