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Employee Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 2.0	$ 2.5	$ 2.0
Interest cost	1.9	1.6	2.0
Expected return on assets	(1.5)	(1.5)	(1.4)
Curtailment	0.1	(0.2)	0.1
Recognized net actuarial loss	1.0	2.3	0.5
Net periodic benefit cost	$ 3.5	$ 4.7	$ 3.2
Minimum [Member]
Weighted average assumptions
Discount rate	1.13%	1.00%	1.00%
Expected return on plan assets	1.13%	1.00%	1.00%
Rate of compensation increase	1.37%	2.25%	2.25%
Maximum [Member]
Weighted average assumptions
Discount rate	7.50%	8.68%	7.00%
Expected return on plan assets	3.50%	3.50%	3.50%
Rate of compensation increase	7.00%	7.00%	5.50%

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

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Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

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Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from event reducing expected years of future service of present employees or eliminating accrual of defined benefits for some or all future services of present employees.

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