Restatements (Schedule Of Effect Of Restatement Adjustment On Consolidated Financial Statements) (Details) (Imported) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011
Goodwill	$ 1,391.4	$ 1,160.9
Total assets	4,452.7	6,279.2
Retained earnings	101.9	1,026.9
Total shareholders' equity	1,679.3	2,565.2
Total liabilities and shareholders' equity	4,452.7	6,279.2
Previously Reported [Member]
Goodwill		2,590.1	[1]
Total assets		6,333.2
Retained earnings		1,080.9
Total shareholders' equity		2,619.2
Total liabilities and shareholders' equity		6,333.2
Restatement Adjustment [Member]
Goodwill		(54.0)
Total assets		(54.0)
Retained earnings		(54.0)
Total shareholders' equity		(54.0)
Total liabilities and shareholders' equity		(54.0)
Corrected [Member]
Goodwill		2,536.1
Total assets		6,279.2
Retained earnings		1,026.9
Total shareholders' equity		2,565.2
Total liabilities and shareholders' equity		6,279.2
Recast Adjustment [Member]
Goodwill		(1,375.2)
Parent Company [Member]
Total assets	3,974.7	5,244.5
Total shareholders' equity	1,679.3	2,565.2
Total liabilities and shareholders' equity	3,974.7	5,244.5
Parent Company [Member] | Previously Reported [Member]
Total assets		5,326.5
Total shareholders' equity		2,619.2
Total liabilities and shareholders' equity		$ 5,326.5

[1] The calculated amount of impairment of intangible assets was incorrect as discussed in Note 3.