Retirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Cash contributions to funded pension plans and benefit payments under unfunded pension plans	$ 31.4	$ 230.0	$ 300.8
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Total expected contributions for current fiscal year	80.0
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Total expected contributions for current fiscal year	$ 100.0