Employee Retirement Plans (Details 5) (U.S Pension Plans [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	$ 351.5	$ 289.7
Equity Securities Domestic [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	188.2	143.1
Equity Securities International [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	36.9	31.0
Fixed Income [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	123.3	113.6
Cash Equivalents [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	3.1	2.0
Quoted Prices In Active Market For Identical Assets And Liabilities (Level 1) [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	348.4	287.7
Quoted Prices In Active Market For Identical Assets And Liabilities (Level 1) [Member] \| Equity Securities Domestic [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	188.2	143.1
Quoted Prices In Active Market For Identical Assets And Liabilities (Level 1) [Member] \| Equity Securities International [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	36.9	31.0
Quoted Prices In Active Market For Identical Assets And Liabilities (Level 1) [Member] \| Fixed Income [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	123.3	113.6
Quoted Prices In Active Market For Identical Assets And Liabilities (Level 1) [Member] \| Cash Equivalents [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets
Significant Other Observable Inputs (Level 2) [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	3.1	2.0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Securities Domestic [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets
Significant Other Observable Inputs (Level 2) [Member] \| Equity Securities International [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets
Significant Other Observable Inputs (Level 2) [Member] \| Fixed Income [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets
Significant Other Observable Inputs (Level 2) [Member] \| Cash Equivalents [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets	3.1	2.0
Unobservable Inputs (Level 3) [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets
Unobservable Inputs (Level 3) [Member] \| Equity Securities Domestic [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets
Unobservable Inputs (Level 3) [Member] \| Equity Securities International [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets
Unobservable Inputs (Level 3) [Member] \| Fixed Income [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets
Unobservable Inputs (Level 3) [Member] \| Cash Equivalents [Member]
Fair Value of Pension Plan Assets
Fair Value of Plan Assets

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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