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Retirement Benefits (Projected benefit payments) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
US [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2014 $ 115.6
2015 124.7
2016 130.3
2017 141.3
2018 148.8
2019 - 2023 885.2
International [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2014 46.4
2015 51.3
2016 53.3
2017 54.8
2018 57.7
2019 - 2023 344.1
Other Postretirement Benefit Plans, Defined Benefit [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
2014 11.1
2015 10.9
2016 11.0
2017 10.8
2018 10.6
2019 - 2023 $ 46.3