Other Intangible Assets, Net (Amortization Expense Related To Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 20.1	$ 16.3	$ 40.9	$ 32.6
Computer Software [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	1.2	1.8	3.2	3.6
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	17.8	13.4	35.5	26.9
Trademark [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	0.6	0.6	1.2	1.1
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 0.5	$ 0.5	$ 1.0	$ 1.0