Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2012
Reserves Deducted From Assets In The Consolidated Balance Sheet
Valuation and Qualifying Account
Balance at beginning of year	$ 39.5		$ 36.1		$ 36.8
Charged (credited) to costs and expenses	43.5		30.2		26.5
Balance at end of year	39.1		39.5		36.1
Reserves Deducted From Assets In The Consolidated Balance Sheet | Allowance for Doubtful Accounts
Valuation and Qualifying Account
Other	43.0	[1]	27.4	[1]	26.8	[1]
Reserves Deducted From Assets In The Consolidated Balance Sheet | Allowance for Foreign Currency Exchange Effects
Valuation and Qualifying Account
Other	0.9	[2]	(0.6)	[2]	0.4	[2]
Other Reserves
Valuation and Qualifying Account
Balance at beginning of year	97.6		77.0		78.2
Charged (credited) to costs and expenses	0.4		(5.7)		(4.0)
Balance at end of year	59.2		97.6		77.0
Other Reserves | Valuation Allowance, Tax Credit Carryforward
Valuation and Qualifying Account
Other	34.0	[3]	26.3	[3]
Other Reserves | Valuation Allowance, Operating Loss Carryforwards
Valuation and Qualifying Account
Other	4.8	[4]
Other Reserves | Reserves of Businesses Acquired
Valuation and Qualifying Account
Other					$ 2.8	[5]

[1] Uncollectible accounts written off, net of recoveries.

[2] Effects of currency exchange.

[3] Foreign tax credit valuation allowance adjustment.

[4] Decrease in unusable foreign operating loss carryforwards.

[5] Acquisition.