Retirement And Postretirement Benefit Plans (Schedule Of Accumulated Benefit Obligations Exceeding Plan Assets) (Details) (USD $) In Millions	Sep. 30, 2011	Sep. 30, 2010
PBO [Member]
Accumulated benefit obligations exceeding plan assets	$ 295.9	$ 266.5
PBO [Member] | Supplemental Executive Plan [Member]
Accumulated benefit obligations exceeding plan assets	4.4	4.2
PBO [Member] | Master Plan [Member]
Accumulated benefit obligations exceeding plan assets	278.5	248.3
PBO [Member] | German Plan [Member]
Accumulated benefit obligations exceeding plan assets	10.5	11.5
PBO [Member] | French Plan [Member]
Accumulated benefit obligations exceeding plan assets	2.5	2.5
ABO [Member]
Accumulated benefit obligations exceeding plan assets	271.6	243.6
ABO [Member] | Supplemental Executive Plan [Member]
Accumulated benefit obligations exceeding plan assets	3.7	3.2
ABO [Member] | Master Plan [Member]
Accumulated benefit obligations exceeding plan assets	255.7	227.2
ABO [Member] | German Plan [Member]
Accumulated benefit obligations exceeding plan assets	10.5	11.5
ABO [Member] | French Plan [Member]
Accumulated benefit obligations exceeding plan assets	1.7	1.7
Plan Assets [Member]
Accumulated benefit obligations exceeding plan assets	217.3	215.7
Plan Assets [Member] | Master Plan [Member]
Accumulated benefit obligations exceeding plan assets	216.9	215.3
Plan Assets [Member] | French Plan [Member]
Accumulated benefit obligations exceeding plan assets	$ 0.4	$ 0.4