Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Out-of pocket-cost, fee and expense reimbursement	$ 2.5
Percentage of Net Other Productive Assets	16.00%	16.00%	17.00%
Annual Installments Period Minimum	20 years
Annual Installments Period Maximum	26 years
Winners Electing Lump Sum Payment Option Percent	90.00%
Annuity Interest Accretion (in Dollars)	17.8	20.0	22.4
Option price to exercise date market price	95.00%
Stock Option Contractual Term At Date Of Grant	10 years
Shares vesting at end of vesting period (in hundredths)	100.00%
ESPP Term of award	12 months
Advertising Expense (in Dollars)	$ 68.2	$ 34.3	$ 10.8
Contracts Payment Terms Minimum	1 year
Contracts Payment Terms Maximum	5 years
Notes Payment Terms Minimum	1 year
Notes Payment Terms Maximum	7 years
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Finite-Lived Intangible Asset, Useful Life	1 year
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Finite-Lived Intangible Asset, Useful Life	9 years