Retirement Benefits (Schedule of estimated remaining cash contributions) (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2017 USD ($)
United States Pension Plans of US Entity, Defined Benefit [Member]
Estimated future employer contributions in the currect fiscal year	$ 0
United Kingdom Plan, Defined Benefit [Member]
Estimated future employer contributions in the currect fiscal year	123
Japan Plan, Defined Benefit [Member]
Estimated future employer contributions in the currect fiscal year	0
Other Postretirement Benefit Plans, Defined Benefit [Member]
Estimated future employer contributions in the currect fiscal year	$ 2,028