Selected Quarterly Data (Scheduled Of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Selected Quarterly Data [Line Items]
After tax impact transaction and integration expenses	$ 22.4	$ 31.1
EPS Impact of Transaction and Integration Expenses - Basic		$ 0.25
EPS Impact of Transaction and Integration Expenses - Diluted	$ 0.17	$ 0.24
Net sales	$ 1,490.9	$ 1,185.2	$ 1,114.3	$ 1,043.7	$ 1,227.0	$ 1,091.0	$ 1,063.3	$ 1,030.2	$ 4,834.1	$ 4,411.5	$ 4,296.3
Gross profit	668.2	484.4	444.6	413.0	540.0	453.9	432.8	405.0	2,010.2	1,831.7	1,737.3
Operating income	266.9	168.7	132.6	134.2	219.1	167.8	125.0	129.1	702.4	641.0	548.4
Net income	$ 175.7	$ 108.2	$ 100.0	$ 93.5	$ 157.4	$ 127.7	$ 93.8	$ 93.4	$ 477.4	$ 472.3	$ 401.6
Basic earnings per share	$ 1.34	$ 0.86	$ 0.80	$ 0.75	$ 1.25	$ 1.01	$ 0.74	$ 0.73	$ 3.77	$ 3.73	$ 3.14
Diluted earnings per share	1.32	0.85	0.79	0.74	1.24	1.00	0.73	0.73	3.72	3.69	3.11
Dividends paid per share (usd per share)	0.47	0.47	0.47	0.47	0.43	0.43	0.43	0.43	1.88	1.72	1.60
Common Stock, Dividends, Per Share, Declared	$ 0.99	$ 0.47	$ 0.47	$ 0.00	$ 0.90	$ 0.43	$ 0.43	$ 0.00	$ 1.93	$ 1.76	$ 1.63
Special charges	$ 9.2	$ 4.7	$ 4.7	$ 3.6	$ 6.2	$ 4.3	$ 3.9	$ 1.6	$ 22.2	$ 15.7	$ 61.5
After tax impact of special charges	$ 6.7	$ 3.2	$ 3.4	$ 2.5	3.7	$ 3.4	$ 2.7	$ 1.3
Gross profit impact of special charges					$ 0.3
EPS impact of Special charges - Basic								$ 0.01
EPS impact of Special charges - Diluted	$ 0.05	$ 0.03	$ 0.03	$ 0.02	$ 0.03	$ 0.03	$ 0.02
Total	$ 31.3	$ 30.4							$ 40.8
Transaction expenses included in cost of goods sold	$ 15.0	5.9
Transaction expenses included in other debt costs		$ 15.4
Common Stock [Member]
Selected Quarterly Data [Line Items]
Common Stock, Market price, High	$ 102.72	$ 105.64	104.26	98.90	102.01	107.05	100.06	94.10
Common Stock, Market price, Low	93.70	92.15	97.33	89.23	91.06	96.92	91.32	79.53
Common Stock Non-Voting [Member]
Selected Quarterly Data [Line Items]
Common Stock, Market price, High	102.64	105.92	104.48	99.33	101.98	107.07	100.71	94.10
Common Stock, Market price, Low	$ 93.99	$ 92.07	$ 97.53	$ 88.78	$ 91.08	$ 97.18	$ 91.39	$ 79.78