Fair Value Measurements (Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Feb. 29, 2012	Nov. 30, 2011	Feb. 28, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents	$ 54.4	$ 53.9	$ 40.6
Insurance contracts	62.9	59.1	55.7
Bonds & other long-term investments	13.9	12.3	14.1
Interest rate derivatives	17.4	18.9	14.8
Foreign currency derivatives, Assets	1.3	2.7	0.7
Total	149.9	146.9	125.9
Foreign currency derivatives, Liabilities	1.0	0.4	3.3
Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents	54.4	53.9	40.6
Bonds & other long-term investments	13.9	12.3	14.1
Total	68.3	66.2	54.7
Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Insurance contracts	62.9	59.1	55.7
Interest rate derivatives	17.4	18.9	14.8
Foreign currency derivatives, Assets	1.3	2.7	0.7
Total	81.6	80.7	71.2
Foreign currency derivatives, Liabilities	1.0	0.4	3.3
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents
Insurance contracts
Bonds & other long-term investments
Interest rate derivatives
Foreign currency derivatives, Assets
Total
Foreign currency derivatives, Liabilities