Valuation and Qualifying Accounts (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Valuation and Qualifying Account (Textual) [Abstract]
Insurance indemnification receivables associated with its property and casualty liabilities	$ 11.3	$ 7.2	$ 1.0
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Account
Beginning Balance	34.6	38.3	40.8
Charged (credited) to costs and expenses	20.0	27.1	34.1
Other	(17.8)	(30.8)	(42.3)
Other, Acquisition			5.7
Ending Balance	36.8	34.6	38.3
Property and Casualty Liability [Member]
Valuation and Qualifying Account
Beginning Balance	65.7	72.3	77.4
Charged (credited) to costs and expenses	22.5	15.2	22.7
Valuation allowances and reserves, deductions on other adjustment	(26.5)	(27.4)	(32.6)
Other Adjustments	3.6	5.6	0.2
Other, Acquisition			4.6
Ending Balance	65.3	65.7	72.3
Reserve for Environmental Costs Litigation and Other [Member]
Valuation and Qualifying Account
Beginning Balance	65.8	66.3	31.4
Charged (credited) to costs and expenses	(5.3)	5.4	20.5
Valuation allowances and reserves, deductions on other adjustment	(25.4)	(4.9)	(5.5)
Other Adjustments	1.8	(1.0)	6.0
Other, Acquisition			13.9
Ending Balance	36.9	65.8	66.3
Other reserves deferred tax assets valuation allowance [Member]
Valuation and Qualifying Account
Beginning Balance	78.4	87.8	56.5
Charged (credited) to costs and expenses	3.5	(9.4)	31.3
Ending Balance	$ 81.9	$ 78.4	$ 87.8