Retirement Benefits - Components of Net Periodic Benefit Expense (Income) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Pension Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	$ 6.3	$ 4.5
Interest cost on benefit obligation	61.0	73.5
Pension Benefits [Member] | Net Periodic Benefit Expense [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	6.3	4.5	3.9
Interest cost on benefit obligation	61.0	73.5	78.4
Assumed return on plan assets	(96.4)	(99.2)	(102.4)
Amortization of prior service (credits) costs
Amortization of net losses (gains)	94.6	62.1	66.4
Net periodic benefit expense	65.5	40.9	46.3
Medical and Life Insurance Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	0.1	0.1
Interest cost on benefit obligation	2.4	3.3
Medical and Life Insurance Benefits [Member] | Net Periodic Benefit Expense [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Service cost	0.1	0.1	0.1
Interest cost on benefit obligation	2.4	3.3	3.5
Assumed return on plan assets
Amortization of prior service (credits) costs	(0.9)	(0.1)	0.1
Amortization of net losses (gains)	(2.1)	(3.2)	(3.6)
Net periodic benefit expense	$ (0.5)	$ 0.1	$ 0.1