Fair Value Measurements-Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) (Recurring [Member], USD $) In Millions, unless otherwise specified	Feb. 28, 2015	Nov. 30, 2014	Feb. 28, 2014
Assets [Abstract]
Cash and cash equivalents	$ 81.8	$ 77.3	$ 89.4
Insurance contracts	106.8	104.5	92.3
Bonds & other long-term investments	7.8	8.5	15.2
Interest rate derivatives	4.9	7.4	9.7
Foreign currency derivatives	8.4	4.9	2.4
Total assets	209.7	202.6	209.0
Liabilities [Abstract]
Foreign currency derivatives	3.4	1.4	1.9
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	81.8	77.3	89.4
Insurance contracts	0	0	0
Bonds & other long-term investments	7.8	8.5	15.2
Interest rate derivatives	0	0	0
Foreign currency derivatives	0	0	0
Total assets	89.6	85.8	104.6
Liabilities [Abstract]
Foreign currency derivatives	0	0	0
Level 2 [Member]
Assets [Abstract]
Cash and cash equivalents	0	0	0
Insurance contracts	106.8	104.5	92.3
Bonds & other long-term investments	0	0	0
Interest rate derivatives	4.9	7.4	9.7
Foreign currency derivatives	8.4	4.9	2.4
Total assets	120.1	116.8	104.4
Liabilities [Abstract]
Foreign currency derivatives	3.4	1.4	1.9
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