Fair Value Measurements-Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) (Recurring [Member], USD $) In Millions, unless otherwise specified	May 31, 2013	Nov. 30, 2012	May 31, 2012
Fair Value [Member]
Assets [Abstract]
Cash and cash equivalents	$ 72.1	$ 79.0	$ 61.4
Insurance contracts	80.5	72.5	63.3
Bonds & other long-term investments	13.4	13.6	12.3
Interest rate derivatives	18.4	16.7	17.9
Foreign currency derivatives	1.9	0.9	1.7
Total assets	186.3	182.7	156.6
Liabilities [Abstract]
Foreign currency derivatives	0.6	1.9	2.7
Interest Rate Derivative Liabilities, at Fair Value		0.1
Liabilities, Fair Value Disclosure		2.0
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	72.1	79.0	61.4
Insurance contracts	0	0	0
Bonds & other long-term investments	13.4	13.6	12.3
Interest rate derivatives	0	0	0
Foreign currency derivatives	0	0	0
Total assets	85.5	92.6	73.7
Liabilities [Abstract]
Foreign currency derivatives	0	0	0
Level 2 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0	0
Insurance contracts	80.5	72.5	63.3
Bonds & other long-term investments	0	0	0
Interest rate derivatives	18.4	16.7	17.9
Foreign currency derivatives	1.9	0.9	1.7
Total assets	100.8	90.1	82.9
Liabilities [Abstract]
Foreign currency derivatives	0.6	1.9	2.7
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