Fair Value Measurements-Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) (Recurring [Member], USD $) In Millions, unless otherwise specified	May 31, 2014	Nov. 30, 2013	May 31, 2013
Fair Value [Member]
Assets [Abstract]
Cash and cash equivalents	$ 81.4	$ 63.0	$ 72.1
Insurance contracts	96.5	90.1	80.5
Bonds & other long-term investments	12.6	13.3	13.4
Interest rate derivatives	9.8	12.2	18.4
Foreign currency derivatives	0.8	1.1	1.9
Total assets	201.1	179.7	186.3
Liabilities [Abstract]
Foreign currency derivatives	1.4	1.6	0.6
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	81.4	63.0	72.1
Insurance contracts	0	0	0
Bonds & other long-term investments	12.6	13.3	13.4
Interest rate derivatives	0	0	0
Foreign currency derivatives	0	0	0
Total assets	94.0	76.3	85.5
Liabilities [Abstract]
Foreign currency derivatives	0	0	0
Level 2 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0	0
Insurance contracts	96.5	90.1	80.5
Bonds & other long-term investments	0	0	0
Interest rate derivatives	9.8	12.2	18.4
Foreign currency derivatives	0.8	1.1	1.9
Total assets	107.1	103.4	100.8
Liabilities [Abstract]
Foreign currency derivatives	1.4	1.6	0.6
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