Retirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		12 Months Ended			3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2012	Jun. 30, 2013 Minimum [Member]	Jun. 30, 2013 Maximum [Member]	Jun. 30, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash contributions to funded pension plans and benefit payments under unfunded pension plans		$ 258.6	$ 31.6	$ 76.4
Total expected contributions for current fiscal year					280.0	290.0
Settlement charges recognized	$ 4.5						$ 0	$ 0	$ 0	$ 0