Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended						0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014 Minimum [Member]	Sep. 30, 2014 Maximum [Member]	Jul. 15, 2014 IGT [Member]	Jul. 15, 2014 GTECH [Member]
Proposed Merger, Consideration Transferred							$ 6,400,000,000
Payments for Proposed Merger, Gross							4,700,000,000
Business Combination, Consideration Transferred, Liabilities Incurred							1,700,000,000
Business Acquisition, Share Price							$ 13.69
BusinessAcquisitionSharesReceivedPricePerShare							$ 4.56
BusinessAcquisitionPotentialTerminationFeeIncurred						135,300,000	270,600,000
Percentage of Net Other Productive Assets	16.00%	16.00%	16.00%
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)	15,700,000	17,800,000	20,000,000
Option price to exercise date market price	95.00%
Stock Option Contractual Term At Date Of Grant	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				3 years	5 years
Shares vesting at end of vesting period (in hundredths)	100.00%
ESPP Term of award	12 months
Advertising Expense (in Dollars)	$ 74,600,000	$ 68,200,000	$ 34,300,000
Contracts Payment Terms Minimum	1 year
Contracts Payment Terms Maximum	5 years
Notes Payment Terms Minimum	1 year
Notes Payment Terms Maximum	7 years
Finite-Lived Intangible Asset, Useful Life				1 year	8 years