Fair Value Measurements-Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) (Recurring [Member], USD $) In Millions, unless otherwise specified	Aug. 31, 2013	Nov. 30, 2012	Aug. 31, 2012
Fair Value [Member]
Assets [Abstract]
Cash and cash equivalents	$ 146.8	$ 79.0	$ 72.2
Insurance contracts	84.3	72.5	71.1
Bonds & other long-term investments	13.0	13.6	12.9
Interest rate derivatives	11.5	16.7	16.6
Foreign currency derivatives	1.4	0.9	0.7
Total assets	257.0	182.7	173.5
Liabilities [Abstract]
Foreign currency derivatives	1.0	1.9	1.6
Interest Rate Derivative Liabilities, at Fair Value		0.1
Liabilities, Fair Value Disclosure		2.0
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	146.8	79.0	72.2
Insurance contracts	0	0	0
Bonds & other long-term investments	13.0	13.6	12.9
Interest rate derivatives	0	0	0
Foreign currency derivatives	0	0	0
Total assets	159.8	92.6	85.1
Liabilities [Abstract]
Foreign currency derivatives	0	0	0
Level 2 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0	0
Insurance contracts	84.3	72.5	71.1
Bonds & other long-term investments	0	0	0
Interest rate derivatives	11.5	16.7	16.6
Foreign currency derivatives	1.4	0.9	0.7
Total assets	97.2	90.1	88.4
Liabilities [Abstract]
Foreign currency derivatives	1.0	1.9	1.6
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