Selected Quarterly Data (Scheduled Of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2015	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Selected Quarterly Data [Line Items]
Net sales	$ 1,227.0	$ 1,091.0	$ 1,063.3	$ 1,030.2	$ 1,201.9	$ 1,059.9	$ 1,024.1	$ 1,010.4	$ 4,411.5	$ 4,296.3	$ 4,243.2
Gross profit	540.0	453.9	432.8	405.0	521.7	421.9	404.0	389.7	1,831.7	1,737.3	1,730.2
Operating income	219.1	167.8	125.0	129.1	212.2	138.7	103.8	93.7	641.0	548.4	603.0
Net income	$ 157.4	$ 127.7	$ 93.8	$ 93.4	$ 149.2	$ 97.6	$ 84.3	$ 70.5	$ 472.3	$ 401.6	$ 437.9
Basic earnings per share	$ 1.25	$ 1.01	$ 0.74	$ 0.73	$ 1.17	$ 0.76	$ 0.66	$ 0.55	$ 3.73	$ 3.14	$ 3.37
Diluted earnings per share	1.24	1.00	0.73	0.73	1.16	0.76	0.65	0.55	3.69	3.11	3.34
Dividends paid per share (usd per share)	0.43	0.43	0.43	0.43	0.40	0.40	0.40	0.40	1.72	1.60	1.48
Common Stock, Dividends, Per Share, Declared	$ 0.90	$ 0.43	$ 0.43	$ 0.00	$ 0.83	$ 0.40	$ 0.40	$ 0.00	$ 1.76	$ 1.63	$ 1.51
Special charges	$ 6.2	$ 4.3	$ 3.9	$ 1.6	$ 3.0	$ 15.1	$ 19.0	$ 28.4	$ 15.7	$ 61.5	$ 5.2
After tax impact of special charges	3.7	$ 3.4	$ 2.7	$ 1.3	3.0	12.1	$ 12.9	$ 19.9
Gross profit impact of special charges	$ 0.3				$ 0.6	$ 3.4
EPS impact of Special charges - Basic								$ 0.16
EPS impact of Special charges - Diluted	$ 0.03	$ 0.03	$ 0.02	$ 0.01	$ 0.02	$ 0.09	$ 0.10	0.15
Common Stock [Member]
Selected Quarterly Data [Line Items]
Common Stock, Market price, High	102.01	107.05	100.06	94.10	86.04	84.89	79.53	76.37
Common Stock, Market price, Low	91.06	96.92	91.32	79.53	77.70	76.13	68.29	71.45
Common Stock Non-Voting [Member]
Selected Quarterly Data [Line Items]
Common Stock, Market price, High	101.98	107.07	100.71	94.10	86.03	85.20	79.61	76.78
Common Stock, Market price, Low	$ 91.08	$ 97.18	$ 91.39	$ 79.78	$ 77.61	$ 76.02	$ 71.98	$ 71.39