Retirement Benefits - Schedule of Estimated Future Benefit Payments (Details) (USD $) In Millions, unless otherwise specified	Nov. 30, 2014
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future Net Benefit Payments, 2015	$ 126.3
Estimated future Net Benefit Payments, 2016	124.3
Estimated future Net Benefit Payments, 2017	122.3
Estimated future Net Benefit Payments, 2018	119.9
Estimated future Net Benefit Payments, 2019	117.3
Estimated future Net Benefit Payments, Years 2020 - 2024	543.4
Medical and Life Insurance Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future Net Benefit Payments, 2015	6.4
Estimated future Net Benefit Payments, 2016	6.2
Estimated future Net Benefit Payments, 2017	5.9
Estimated future Net Benefit Payments, 2018	5.6
Estimated future Net Benefit Payments, 2019	5.2
Estimated future Net Benefit Payments, Years 2020 - 2024	20.9
Estimated future Gross Benefit Payments, 2015	6.7
Estimated future Gross Benefit Payments, 2016	6.5
Estimated future Gross Benefit Payments, 2017	6.2
Estimated future Gross Benefit Payments, 2018	5.9
Estimated future Gross Benefit Payments, 2019	5.5
Estimated future Gross Benefit Payments, Years 2020 - 2024	21.9
Estimated future Medicare D Subsidy, 2015	0.3
Estimated future Medicare D Subsidy, 2016	0.3
Estimated future Medicare D Subsidy, 2017	0.3
Estimated future Medicare D Subsidy, 2018	0.3
Estimated future Medicare D Subsidy, 2019	0.3
Estimated future Medicare D Subsidy, Years 2020 - 2024	$ 1.0