Retirement Benefit (Details Textuals) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Company contribution range	3% to 7%
Voluntary contributions to U.S. qualified pension plan			$ 300.0
Recognized prior service credits	12.9
Recognized prior service credits, net of tax	8.1
Recognized net actuarial losses	102.6
Recognized net actuarial losses, net of tax	66.4
Accumulated benefit obligation for pension plans	3,960.2	3,563.2
Expense related to defined contribution savings plans	43.8	40.9	38.2
Defined Benefit Plan, Amounts that will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year
Prior service credits	17.2
Prior service credits, net of tax	10.8
Net actuarial losses	126.0
Net actuarial losses, net of tax	82.6
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Recognized prior service credits	2.7	2.5	2.3
Recognized net actuarial losses	99.7	144.6	94.7
Non-U.S. Pension Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future payments, during next fiscal year	45.5
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Recognized prior service credits	10.2	10.7	10.6
Recognized net actuarial losses	2.9	4.4	2.4
U.S. Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Decrease in gross healthcare trend rate	5.50%
Year of decrease in gross healthcare trend rate	2017
Non-U.S. Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Decrease in gross healthcare trend rate	4.50%
Year of decrease in gross healthcare trend rate	2017
Estimated future payments, during next fiscal year	$ 15.2