Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, unless otherwise specified	Nov. 30, 2013	Nov. 30, 2012
Trade accounts receivable, allowances	$ 4.1	$ 4.0
Common Stock [Member]
Common stock, par value (usd per share)
Common stock, shares authorized	320.0	320.0
Common stock, shares issued	12.1	12.4
Common stock, shares outstanding	12.1	12.4
Common Stock Non-Voting [Member]
Common stock, par value (usd per share)
Common stock, shares authorized	320.0	320.0
Common stock, shares issued	119.0	120.1
Common stock, shares outstanding	119.0	120.1