Share Capital (Movements In Shares Issued And Outstanding) (Details) In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Stockholders' Equity Attributable to Parent [Abstract]
Common shares issued	490.4	490.4
Less: Treasury shares for which dividend and voting rights do not apply	(47.2)	(46.4)
Common shares outstanding	443.2	444.0