Restatements (Schedule Of Effect Of Restatement Adjustment On Consolidated Financial Statements) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Sep. 30, 2011
Goodwill	$ 1,391.0		$ 1,160.9
Total Assets	6,863.6		6,279.2
Retained earnings	1,092.2		1,026.9
Total shareholders' equity	2,640.2		2,565.2
Total liabilities and shareholders' equity	6,863.6		6,279.2
Previously Reported [Member]
Goodwill	2,820.4	[1]	2,590.1	[1]
Total Assets	6,917.6		6,333.2
Retained earnings	1,146.2		1,080.9
Total shareholders' equity	2,694.2		2,619.2
Total liabilities and shareholders' equity	6,917.6		6,333.2
Restatement Adjustment [Member]
Goodwill	(54.0)		(54.0)
Total Assets	(54.0)		(54.0)
Retained earnings	(54.0)		(54.0)
Total shareholders' equity	(54.0)		(54.0)
Total liabilities and shareholders' equity	(54.0)		(54.0)
Corrected [Member]
Goodwill	2,766.4		2,536.1
Total Assets	6,863.6		6,279.2
Retained earnings	1,092.2		1,026.9
Total shareholders' equity	2,640.2		2,565.2
Total liabilities and shareholders' equity	6,863.6		6,279.2
Recast Adjustment [Member]
Goodwill	$ (1,375.4)		$ (1,375.2)

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