Fair Value Measurements-Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) (Recurring [Member], USD $) In Millions, unless otherwise specified	Aug. 31, 2014	Nov. 30, 2013	Aug. 31, 2013
Fair Value [Member]
Assets [Abstract]
Cash and cash equivalents	$ 93.8	$ 63.0	$ 146.8
Insurance contracts	103.3	90.1	84.3
Bonds & other long-term investments	8.2	13.3	13.0
Interest rate derivatives	7.3	12.2	11.5
Foreign currency derivatives	1.6	1.1	1.4
Total assets	214.2	179.7	257.0
Liabilities [Abstract]
Foreign currency derivatives	0.8	1.6	1.0
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	93.8	63.0	146.8
Insurance contracts	0	0	0
Bonds & other long-term investments	8.2	13.3	13.0
Interest rate derivatives	0	0	0
Foreign currency derivatives	0	0	0
Total assets	102.0	76.3	159.8
Liabilities [Abstract]
Foreign currency derivatives	0	0	0
Level 2 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0	0
Insurance contracts	103.3	90.1	84.3
Bonds & other long-term investments	0	0	0
Interest rate derivatives	7.3	12.2	11.5
Foreign currency derivatives	1.6	1.1	1.4
Total assets	112.2	103.4	97.2
Liabilities [Abstract]
Foreign currency derivatives	0.8	1.6	1.0
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