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Retirement Benefits (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Pension Benefits [Member]
Amounts included in accumulated other comprehensive loss, net of tax
Prior service cost (credit)	$ 4.0	$ 1.4
Net actuarial loss	904.7	812.2
Net transition benefit		(0.1)
Total	908.7	813.5
Other Postretirement Benefits [Member]
Amounts included in accumulated other comprehensive loss, net of tax
Prior service cost (credit)	(31.9)	(15.1)
Net actuarial loss	32.6	25.4
Net transition benefit
Total	$ 0.7	$ 10.3

The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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