Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Nov. 30, 2018	Nov. 30, 2017
Trade accounts receivable, allowances	$ 6.4	$ 6.6
Common Stock [Member]
Common stock, par value (usd per share)
Common stock, shares authorized	320,000,000.0	320,000,000.0
Common stock, shares issued	9,600,000	10,000,000
Common stock, shares outstanding	9,600,000	10,000,000
Common Stock Non-Voting [Member]
Common stock, par value (usd per share)
Common stock, shares authorized	320,000,000.0	320,000,000.0
Common stock, shares issued	122,500,000	121,000,000
Common stock, shares outstanding	122,500,000	121,000,000

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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