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, 2012	Aug. 31, 2012	May 31, 2012	Feb. 29, 2012	Nov. 30, 2011	Aug. 31, 2011	May 31, 2011	Feb. 28, 2011	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Selected Quarterly Data [Line Items]
Net sales	$ 1,145.8	$ 977.7	$ 984.0	$ 906.7	$ 1,110.7	$ 920.4	$ 883.7	$ 782.8	$ 4,014.2	$ 3,697.6	$ 3,336.8
Gross profit	482.4	391.7	388.4	355.3	479.1	364.5	350.7	328.2	1,617.8	1,522.5	1,417.7
Operating income	200.2	144.2	121.3	112.5	192.0	128.4	109.3	110.6	578.3	540.3	509.8
Net income	$ 148.5	$ 104.4	$ 80.4	$ 74.5	$ 131.7	$ 92.0	$ 73.6	$ 76.8	$ 407.8	$ 374.2	$ 370.2
Basic earnings per share	$ 1.12	$ 0.79	$ 0.61	$ 0.56	$ 0.99	$ 0.69	$ 0.56	$ 0.58	$ 3.07	$ 2.82	$ 2.79
Diluted earnings per share	$ 1.11	$ 0.78	$ 0.60	$ 0.55	$ 0.98	$ 0.69	$ 0.55	$ 0.57	$ 3.04	$ 2.79	$ 2.75
Dividends paid per share (usd per share)	$ 0.31	$ 0.31	$ 0.31	$ 0.31	$ 0.28	$ 0.28	$ 0.28	$ 0.28	$ 1.24	$ 1.12	$ 1.04
Common Stock [Member]
Selected Quarterly Data [Line Items]
Common Stock, Market price, High	$ 66.00	$ 61.45	$ 57.26	$ 51.91	$ 49.85	$ 50.85	$ 50.21	$ 47.50
Common Stock, Market price, Low	$ 61.01	$ 55.08	$ 50.57	$ 48.52	$ 45.05	$ 44.00	$ 47.10	$ 44.30
Common Stock Non-Voting [Member]
Selected Quarterly Data [Line Items]
Common Stock, Market price, High	$ 66.37	$ 61.69	$ 57.40	$ 52.07	$ 50.03	$ 51.00	$ 50.50	$ 47.71
Common Stock, Market price, Low	$ 61.20	$ 55.18	$ 50.43	$ 48.54	$ 44.93	$ 43.98	$ 46.96	$ 44.20