Retirement Benefits (Schedule of Accumulated Benefit Obligations In Excess of and Less Than Fair Value of Plan Assets) (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Plans with accumulated benefit obligation in excess of plan assets
Projected benefit obligation, plans with ABO in excess of plan assets	$ (198,165)	$ (25,955)
Accumulated benefit obligation, plans with ABO in excess of plan assets	(196,694)	(25,955)
Fair value of plan assets, plans with ABO in excess of plan assets	185,623	24,671
Plans with accumulated benefit obligation less than plan assets
Projected benefit obligation, plans with ABO less than plan assets	(9,936)	(175,320)
Accumulated benefit obligation, plans with ABO less than plan assets	(8,918)	(172,509)
Fair value of plan assets, plans with ABO less than plan assets	$ 10,630	$ 180,490