Retirement Benefits - Schedule of Pension Plans Allocations by Asset Category (Detail)	Nov. 30, 2013	Nov. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Pension plans weighted average asset allocation	100.00%	100.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans weighted average asset allocation	21.00%	26.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans weighted average asset allocation	30.00%	25.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans weighted average asset allocation	18.00%	21.00%
Real Estate Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans weighted average asset allocation	1.00%	2.00%
Private Equity Holdings [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans weighted average asset allocation	8.00%	6.00%
Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans weighted average asset allocation	22.00%	20.00%