Retirement Benefits - Summary of Company's Pension Benefits and Medical and Life Insurance Benefits (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	$ 1,243.1
Gain on plan assets	150.2	81.2	54.5
Ending balance	1,258.4	1,243.1
Benefit obligation - end of year	1,538.6
Pension liability, non-qualified (component of other noncurrent liabilities)	(261.7)	(454.5)
Pension Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	1,243.1	1,296.8
Gain on plan assets	150.2	81.2
Employer contributions	1.2	1.2
Benefits paid	(136.1)	(136.1)
Ending balance	1,258.4	1,243.1
Benefit obligation - beginning of year	1,717.7	1,550.4
Service cost	6.3	4.5
Interest cost	61.0	73.5
Acquisition	5.3
Actuarial(gains) losses	(115.6)	225.4
Benefit obligation - end of year	1,538.6	1,717.7
Funded status of the plans	(280.2)	(474.6)
Pension liability, non-qualified current (component of other current liabilities)	(1.3)	(1.2)
Pension liability, non-qualified (component of other noncurrent liabilities)	(17.2)	(18.9)
Pension benefits, noncurrent	(261.7)	(454.5)
Medical and Life Insurance Benefits [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	5.4	5.1
Benefits paid	(5.4)	(5.1)
Benefit obligation - beginning of year	75.8	75.2
Service cost	0.1	0.1
Interest cost	2.4	3.3
Actuarial(gains) losses	(6.3)	2.3
Benefit obligation - end of year	66.6	75.8
Funded status of the plans	(66.6)	(75.8)
Postretirement medical and life insurance benefits, current	(7.3)	(7.5)
Postretirement medical and life insurance benefits, noncurrent	$ (59.3)	$ (68.3)