Fair Value Measurements-Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) (Recurring [Member], USD $) In Millions, unless otherwise specified	Feb. 28, 2013	Nov. 30, 2012	Feb. 29, 2012
Fair Value [Member]
Assets [Abstract]
Cash and cash equivalents	$ 68.6	$ 79.0	$ 54.4
Insurance contracts	75.7	72.5	62.9
Bonds & other long-term investments	13.9	13.6	13.9
Interest rate derivatives	15.4	16.7	17.4
Foreign currency derivatives	2.3	0.9	1.3
Total assets	175.9	182.7	149.9
Liabilities [Abstract]
Foreign currency derivatives	1.4	1.9	1.0
Interest Rate Derivative Liabilities, at Fair Value		0.1
Liabilities, Fair Value Disclosure		2.0
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	68.6	79.0	54.4
Insurance contracts	0	0	0
Bonds & other long-term investments	13.9	13.6	13.9
Interest rate derivatives	0	0	0
Foreign currency derivatives	0	0	0
Total assets	82.5	92.6	68.3
Liabilities [Abstract]
Foreign currency derivatives	0	0	0
Level 2 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0	0
Insurance contracts	75.7	72.5	62.9
Bonds & other long-term investments	0	0	0
Interest rate derivatives	15.4	16.7	17.4
Foreign currency derivatives	2.3	0.9	1.3
Total assets	93.4	90.1	81.6
Liabilities [Abstract]
Foreign currency derivatives	1.4	1.9	1.0
Interest Rate Derivative Liabilities, at Fair Value		0.1
Liabilities, Fair Value Disclosure		2.0
Level 3 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0	0
Insurance contracts	0	0	0
Bonds & other long-term investments	0	0	0
Interest rate derivatives	0	0	0
Foreign currency derivatives	0	0	0
Total assets	0	0	0
Liabilities [Abstract]
Foreign currency derivatives	$ 0	$ 0	$ 0