Postretirement Benefits (Details) (USD $)	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Postretirement Benefits Additional (Textual) [Abstract]
Net periodic benefit cost	$ 6,900,000	$ 6,600,000	$ 5,500,000
Service cost	1,500,000	1,300,000	1,200,000
Interest cost	2,100,000	2,300,000	2,300,000
Amortization of unrecognized loss cost	1,800,000	(1,400,000)	(600,000)
Amortization of prior service cost	1,500,000	1,600,000	1,500,000
Other cost			100,000
Liabilities related to postretirement benefit plan	56,300,000	60,900,000
Discounted rate for benefit plan	4.40%	3.30%
Defined Benefit Plan Disclosure [Line Items]
Cash surrender value of insurance contracts	68,534,000	64,757,000
2013	1,400,000
2014	1,800,000
2015	2,400,000
2016	2,600,000
2017	2,900,000
2018 - 2022	18,900,000
Supplemental Nonqualified Unfunded Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	1,100,000	500,000	100,000
Cash surrender value of insurance contracts	47,400,000	42,400,000
Unfunded Death Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Cash surrender value of insurance contracts	$ 16,200,000	$ 14,800,000