Selected Quarterly Data (Scheduled Of Quarterly Financial Information) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Nov. 30, 2014	Aug. 31, 2014	May 31, 2014	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Selected Quarterly Data [Line Items]
Net sales	$ 1,173.6	$ 1,042.8	$ 1,033.4	$ 993.4	$ 1,170.1	$ 1,016.4	$ 1,002.6	$ 934.4	$ 4,243.2	$ 4,123.4	$ 4,014.2
Gross profit	506.1	420.1	412.5	391.5	502.2	407.6	394.4	361.7	1,730.2	1,665.8	1,617.8
Operating income	199.4	157.3	121.7	124.6	174.1	148.4	116.0	112.0	603.0	550.5	578.3
Net income	148.0	122.9	84.5	82.5	129.9	104.4	78.6	76.0	437.9	389.0	407.8
Basic earnings per share	$ 1.15	$ 0.95	$ 0.65	$ 0.63	$ 0.99	$ 0.79	$ 0.60	$ 0.57	$ 3.37	$ 2.94	$ 3.07
Diluted earnings per share	$ 1.14	$ 0.94	$ 0.64	$ 0.62	$ 0.98	$ 0.78	$ 0.59	$ 0.57	$ 3.34	$ 2.91	$ 3.04
Dividends paid per share (usd per share)	$ 0.37	$ 0.37	$ 0.37	$ 0.37	$ 0.34	$ 0.34	$ 0.34	$ 0.34	$ 1.48	$ 1.36	$ 1.24
Special charges	2.9	2.3							5.2	25.0	0
Loss on voluntary pension settlement									0	15.3	0
After tax impact of special charges and loss on voluntary pension settlement	$ 2.1	$ 1.6								$ 29.2
EPS impact of Special charges and loss on voluntary pension settlement	$ 0.02	$ 0.01								$ 0.22
Common Stock [Member]
Selected Quarterly Data [Line Items]
Common Stock, Market price, High	$ 73.18	$ 73.04	$ 72.00	$ 70.00	$ 70.00	$ 73.41	$ 74.60	$ 67.28
Common Stock, Market price, Low	$ 65.90	$ 66.00	$ 65.57	$ 62.80	$ 63.29	$ 66.85	$ 68.08	$ 61.03
Common Stock Non-Voting [Member]
Selected Quarterly Data [Line Items]
Common Stock, Market price, High	$ 74.33	$ 73.09	$ 72.31	$ 70.02	$ 70.20	$ 73.36	$ 74.76	$ 67.32
Common Stock, Market price, Low	$ 65.61	$ 65.78	$ 66.12	$ 63.03	$ 64.07	$ 67.09	$ 68.39	$ 61.23