Fair Value Measurements (Details) - Financial Assets (Liabilities) Not Carried at Fair Value (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Jackpot investments Unrealized Gain (Loss)	$ 41.2	$ 66.1
Contracts & notes receivable Unrealized Gain (Loss)	(6.6)	(4.0)
Jackpot liabilities Unrealized Gain (Loss)	(0.2)	(22.0)
Debt Unrealized Gain (Loss)	(224.7)	(228.5)
Level 1 [Member]
Jackpot investments Fair Value	366.3	422.0
Debt Fair Value	(2,346.6)	(1,815.4)
Level 2 [Member]
Debt Fair Value		(140.0)
Level 3 [Member]
Contracts & notes receivable Fair Value	388.3	353.5
Jackpot liabilities Fair Value	(425.2)	(503.0)
Carrying Value [Member]
Jackpot investments Carrying Value	325.1	355.9
Contracts & notes receivable Carrying Value	394.9	357.5
Jackpot liabilities Carrying Value	(425.0)	(481.0)
Debt Carrying Value	(2,121.9)	(1,726.9)
Fair Value [Member]
Jackpot investments Fair Value	366.3	422.0
Contracts & notes receivable Fair Value	388.3	353.5
Jackpot liabilities Fair Value	(425.2)	(503.0)
Debt Fair Value	$ (2,346.6)	$ (1,955.4)