Retirement Benefit (Details Textuals) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2011	Sep. 30, 2009	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Retirement Benefits (Textuals) [ Abstract]
Defined contribution plan contribution by employer range			3% to 7% of eligible compensation
Reduction in retained earnings due to change in measurement date before tax		$ 12.2
Reduction in retained earnings due to change in measurement date net of tax		7.8
Prior service credits			12.9
Prior service credits, net of tax			8.2
Net actuarial losses			70.1
Net actuarial losses, net of tax			44.8
Net transition obligation			0.4
Net transition obligation, net of tax			0.3
Accumulated benefit obligation for pension plans			3,264.9	2,968.8
Expense related to defined contribution savings plans			31.2	23.3	30.5
Defined Benefit Plan, Amounts that will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year
Prior service credits			13.2
Prior service credits, net of tax			8.4
Net actuarial losses			97.1
Net actuarial losses, net of tax			62.5
Net transition obligation			0.2
Net transition obligation, net of tax			0.2
Defined Benefit Plan Disclosure [Line Items]
Voluntary contribution to qualified pension plan trust	300.0		150.0	150.0
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Employer contribution to Defined benefit plan, during next fiscal year			339
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Employer contribution to Defined benefit plan, during next fiscal year			$ 17
US Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Decrease in gross healthcare trend rate			5.50%
Non-U.S. Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Decrease in gross healthcare trend rate			4.50%