Retirement Benefits - Schedule of Changes in Fair Value of Level 3 Investments (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Ending balance	$ 1,258.4	$ 1,243.1
Significant Unobservable Inputs (Level 3) [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	345.6	358.0
Unrealized Gains(Losses) on Plan Assets	32.6	(5.2)
Realized Gains(Losses) on Plan Assets	2.4	0.4
Purchases, Issuances, and Settlements	10.1	(7.6)
Transfers out of Level 3	(0.1)
Ending balance	390.6	345.6
Significant Unobservable Inputs (Level 3) [Member] | Real Estate Investments [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	16.7	19.6
Unrealized Gains(Losses) on Plan Assets	(0.2)	(2.1)
Realized Gains(Losses) on Plan Assets
Purchases, Issuances, and Settlements	(0.8)	(0.8)
Transfers out of Level 3
Ending balance	15.7	16.7
Significant Unobservable Inputs (Level 3) [Member] | Private Equity Holdings [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	74.9	72.0
Unrealized Gains(Losses) on Plan Assets	(9.1)	2.7
Realized Gains(Losses) on Plan Assets
Purchases, Issuances, and Settlements	31.9	0.2
Transfers out of Level 3
Ending balance	97.7	74.9
Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	253.2	259.1
Unrealized Gains(Losses) on Plan Assets	41.8	(5.9)
Realized Gains(Losses) on Plan Assets	2.5
Purchases, Issuances, and Settlements	(21.0)
Transfers out of Level 3
Ending balance	276.5	253.2
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member] | Domestic Equity Securities [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	0.3	0.4
Unrealized Gains(Losses) on Plan Assets		(0.1)
Realized Gains(Losses) on Plan Assets
Purchases, Issuances, and Settlements
Transfers out of Level 3
Ending balance	0.3	0.3
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member] | International Equity Securities [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	0.1
Unrealized Gains(Losses) on Plan Assets
Realized Gains(Losses) on Plan Assets
Purchases, Issuances, and Settlements		0.1
Transfers out of Level 3	(0.1)
Ending balance		0.1
Significant Unobservable Inputs (Level 3) [Member] | Fixed Income [Member] | Foreign Government Securities [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance		0.2
Unrealized Gains(Losses) on Plan Assets		(0.2)
Realized Gains(Losses) on Plan Assets
Purchases, Issuances, and Settlements
Ending balance
Significant Unobservable Inputs (Level 3) [Member] | Fixed Income [Member] | Corporate Debt Securities [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance	0.4	6.7
Unrealized Gains(Losses) on Plan Assets		0.1
Realized Gains(Losses) on Plan Assets		0.7
Purchases, Issuances, and Settlements		(7.1)
Transfers out of Level 3
Ending balance	0.4	0.4
Significant Unobservable Inputs (Level 3) [Member] | Fixed Income [Member] | Asset-Backed Securities [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Beginning balance
Unrealized Gains(Losses) on Plan Assets	0.1	0.3
Realized Gains(Losses) on Plan Assets	(0.1)	(0.3)
Purchases, Issuances, and Settlements
Transfers out of Level 3
Ending balance