The percentage of the fair value of corporate bonds to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of fixed income to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of government bonds to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of large-cap growth to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of large-cap value to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of mid-cap value to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of non-UK equities to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of small-cap value to the fair value of total plan assets held as of the measurement date.

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- Definition

Target allocation percentage of investments in corporate bonds to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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- Definition

Target allocation of investments in fixed income as a percentage of total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation maximum percentage of investments in fixed income to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation minimum percentage of investments in fixed income to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation percentage of investments in government bonds to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation maximum percentage of investments in large-cap growth to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation minimum percentage of investments in large-cap growth to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation maximum percentage of investments in large-cap value to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation minimum percentage of investments in large-cap value to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation maximum percentage of investments in mid-cap value to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation percentage of investments in non-UK equities to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation maximum percentage of investments in small-cap value to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation minimum percentage of investments in small-cap value to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation percentage of investments in UK equities to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation percentage of investments in UK real estate to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation maximum percentage of investments in venture capital to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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Target allocation minimum percentage of investments in venture capital to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of the financial position.

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The percentage of the fair value of UK equities to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of UK real estate assets to the fair value of total plan assets held as of the measurement date.

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The percentage of the fair value of venture capital to the fair value of total plan assets held as of the measurement date.

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The high end of range of percentage contributions to be made by employees during the period for defined contribution plans.

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The low end of range of percentage contributions to be made by employees during the period for defined contribution plans.

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The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).

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The amount of the benefits expected to be paid in Year 5.

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The amount of the benefits expected to be paid in Year 4.

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The amount of the benefits expected to be paid in Year 1.

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The amount of the benefits expected to be paid in Year 3.

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The amount of the benefits expected to be paid in Year 2.

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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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The aggregate percentage of the fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of total plan assets held as of the measurement date.

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The amount of the cost recognized during the period for defined contribution plans.

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Employee Benefit Plans (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
401(k) plans
Percentage contribution by employees for defined contribution 401(k) plans, low end of range (as a percent)	2.00%
Percentage contribution by employees for defined contribution 401(k) plans, high end of range (as a percent)	100.00%
Amounts expensed (income recognized) for matching and discretionary contributions	$ 10.6	$ 5.1	$ 1.0
Pension Benefit
Plan assets, actual allocation
Defined benefit pension plans estimated future employer contributions in fiscal year	40.0
U.S. Pension Plans
Plan assets, target allocation
Fixed income target range, minimum (as a percent)	30.00%
Fixed income target range, maximum (as a percent)	40.00%
Large-cap growth target range, minimum (as a percent)	25.00%
Large-cap growth target range, maximum (as a percent)	35.00%
Large-cap value target range, minimum (as a percent)	5.00%
Large-cap value target range, maximum (as a percent)	15.00%
Mid-cap value target range, minimum (as a percent)	5.00%
Mid-cap value target range, maximum (as a percent)	15.00%
Small-cap value target range, minimum (as a percent)	5.00%
Small-cap value target range, maximum (as a percent)	15.00%
Venture capital target range, minimum (as a percent)	0.00%
Venture capital target range, maximum (as a percent)	5.00%
Plan assets, actual allocation
Fixed income (as a percent)	43.00%	46.00%
Large-cap growth (as a percent)	30.00%	26.00%
Large-cap value (as a percent)	9.00%	8.00%
Mid-cap value (as a percent)	8.00%	10.00%
Small-cap value (as a percent)	10.00%	10.00%
Venture capital (as a percent)	0.00%	0.00%
Total assets- at fair value (as a percent)	100.00%	100.00%
Total assets- at fair value	197.6	176.7	137.5
Estimated future benefit payment under company sponsored plans
2012	6.0
2013	6.8
2014	7.6
2015	8.5
2016	9.7
2017-2021	71.6
Non-U.S. Pension Plans
Plan assets, target allocation
Fixed income (as a percent)	0.00%
UK equities (as a percent)	25.00%
Non-UK equities (as a percent)	35.00%
Government bonds (as a percent)	20.00%
Corporate bonds (as a percent)	15.00%
Real estate (as a percent)	5.00%
Plan assets, actual allocation
Fixed income (as a percent)	3.00%	0.00%
Total assets- at fair value (as a percent)	100.00%	100.00%
UK equities (as a percent)	27.00%	40.00%
Non-UK equities (as a percent)	28.00%	42.00%
Government bonds (as a percent)	21.00%	10.00%
Corporate bonds (as a percent)	16.00%	8.00%
Real estate (as a percent)	5.00%	0.00%
Total assets- at fair value	16.3	15.4	10.3
Estimated future benefit payment under company sponsored plans
2012	0.2
2013	0.2
2014	0.2
2015	0.2
2016	0.2
2017-2021	1.2
Non-Qualified
Estimated future benefit payment under company sponsored plans
2012	5.2
2013	1.3
2014	1.3
2015	1.3
2016	1.3
2017-2021	9.2
Postretirement Health and Other
Plan assets, actual allocation
Defined benefit pension plans estimated future employer contributions in fiscal year	3.0
Estimated future benefit payment under company sponsored plans
2012	2.8
2013	3.1
2014	2.9
2015	3.4
2016	4.1
2017-2021	31.3
Level 1
Plan assets, actual allocation
Total assets- at fair value	119.7	132.3
Level 1 \| U.S. companies
Plan assets, actual allocation
Total assets- at fair value	104.2	90.5
Level 1 \| Government and agency bonds
Plan assets, actual allocation
Total assets- at fair value	3.8	13.1
Level 1 \| Money market funds
Plan assets, actual allocation
Total assets- at fair value	11.7	28.7
Level 2
Plan assets, actual allocation
Total assets- at fair value	94.1	59.7
Level 2 \| International companies
Plan assets, actual allocation
Total assets- at fair value	14.6	15.1
Level 2 \| Government and agency bonds
Plan assets, actual allocation
Total assets- at fair value	35.6	18.7
Level 2 \| Municipal bonds
Plan assets, actual allocation
Total assets- at fair value	0.1	0.1
Level 2 \| Corporate bonds and notes
Plan assets, actual allocation
Total assets- at fair value	43.8	25.8
Level 3
Plan assets, actual allocation
Total assets- at fair value	0.1	0.1
Level 3 \| Venture capital closely held limited partnership
Plan assets, actual allocation
Total assets- at fair value	0.1	0.1
Total
Plan assets, actual allocation
Total assets- at fair value	213.9	192.1
Total \| U.S. companies
Plan assets, actual allocation
Total assets- at fair value	104.2	90.5
Total \| International companies
Plan assets, actual allocation
Total assets- at fair value	14.6	15.1
Total \| Government and agency bonds
Plan assets, actual allocation
Total assets- at fair value	39.4	31.8
Total \| Municipal bonds
Plan assets, actual allocation
Total assets- at fair value	0.1	0.1
Total \| Corporate bonds and notes
Plan assets, actual allocation
Total assets- at fair value	43.8	25.8
Total \| Money market funds
Plan assets, actual allocation
Total assets- at fair value	11.7	28.7
Total \| Venture capital closely held limited partnership
Plan assets, actual allocation
Total assets- at fair value	$ 0.1	$ 0.1