Retirement Benefits (Amount of accumulated other comprehensive income expected to be recognized in next fiscal year) (Details) $ in Millions |
12 Months Ended |
---|---|
Sep. 30, 2016
USD ($)
| |
U.S. [Member] | |
Defined Benefit Plan Disclosure [Line Items] | |
Net actuarial loss | $ 88.8 |
Prior service cost | 2.4 |
International [Member] | |
Defined Benefit Plan Disclosure [Line Items] | |
Net actuarial loss | 55.9 |
Prior service cost | (0.1) |
Other Postretirement Benefit Plan, Defined Benefit [Member] | |
Defined Benefit Plan Disclosure [Line Items] | |
Net actuarial loss | $ 0.2 |