Employee Benefit Plans (Information On Pension Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	$ 185.1
Fair value of plan assets, end of year	188.6	$ 185.1
Deferred charges and other	51.7	231.8
Other long-term liabilities	112.0	121.4
Accumulated other comprehensive loss	(273.6)	(235.8)
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.4	0.4	$ 0.4
Interest cost	2.8	2.7	2.7
Non U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.9	2.0	2.5
Interest cost	3.4	3.6	3.3
Pension Benefit [Member] | United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, beginning of year	70.5	75.3
Service cost	0.4	0.4
Interest cost	2.8	2.7
Actuarial loss (gain)	10.3	(4.2)
Plan Amendments
Benefits paid	(3.8)	(3.7)
Foreign currency exchange rate changes
Benefit obligation, end of year	80.2	70.5	75.3
Fair value of plan assets, beginning of year	69.3	68.9
Actual return on plan assets	2.7	3.7
Employer contributions	0.4	0.4
Benefits paid	(3.8)	(3.7)
Foreign currency exchange rate changes
Fair value of plan assets, end of year	68.6	69.3	68.9
Funded Status	(11.6)	(1.2)
Deferred charges and other		0.1
Other accrued expenses	0.3	0.4
Other long-term liabilities	11.3	0.9
Accumulated other comprehensive loss	$ 19.3	$ 7.5
Weighted average assumptions
Discount rate	3.04%	4.10%
Pension Benefit [Member] | Non U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, beginning of year	$ 148.9	$ 149.8
Service cost	1.9	2.0
Interest cost	3.4	3.6
Actuarial loss (gain)	27.5	1.5
Plan Amendments	0.2
Benefits paid	(5.9)	(5.3)
Foreign currency exchange rate changes	(8.2)	(2.7)
Benefit obligation, end of year	167.8	148.9	149.8
Fair value of plan assets, beginning of year	115.8	115.9
Actual return on plan assets	13.5	1.9
Employer contributions	3.1	5.6
Benefits paid	(5.9)	(5.3)
Foreign currency exchange rate changes	(6.5)	(2.3)
Fair value of plan assets, end of year	120.0	115.8	$ 115.9
Funded Status	(47.8)	(33.1)
Deferred charges and other	3.0	3.2
Other accrued expenses	0.5	0.4
Other long-term liabilities	50.3	35.9
Accumulated other comprehensive loss	$ 49.9	$ 35.8
Pension Benefit [Member] | Minimum [Member] | Non U.S. Plans [Member]
Weighted average assumptions
Discount rate	0.75%	1.00%
Rate of compensation increase	2.25%	2.25%
Pension Benefit [Member] | Maximum [Member] | Non U.S. Plans [Member]
Weighted average assumptions
Discount rate	7.70%	8.30%
Rate of compensation increase	6.00%	7.00%