Postretirement Benefit Plans (Details 5) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	$ (616.7)
Net prior service cost	13.2
Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	(4.4)
Net prior service cost	$ 3.1