Shareholders' Equity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
May 31, 2019	Feb. 28, 2019	May 31, 2018	Feb. 28, 2018	May 31, 2019	May 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent, beginning of period	$ 57.0	$ 57.6	$ 46.5	$ 38.2	$ 57.6	$ 38.2
Net income (loss)	5.6	(4.6)	8.4	7.3	1.0	15.7
Foreign currency translations	(5.5)	3.8	(5.7)	6.3	(1.7)	0.6
Adjustment for accounting change		(0.5)		(6.9)
Post-retirement benefit plans	0.9	0.6	1.1	1.1	1.5	2.2
Share-based compensation	1.5	0.3	0.4	0.5
Other	0.2	(0.2)	0.3	0.0
Stockholders' Equity Attributable to Parent, end of period	$ 59.7	$ 57.0	$ 51.0	$ 46.5	$ 59.7	$ 51.0
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, Outstanding, beginning of period	44.8	44.9	44.8	44.8	44.9	44.8
Stockholders' Equity Attributable to Parent, beginning of period	$ 4.8	$ 4.8	$ 4.8	$ 4.8	$ 4.8	$ 4.8
Stock Issued During Period, Shares, Other		(0.1)	0.1
Shares, Outstanding, end of period	44.8	44.8	44.9	44.8	44.8	44.9
Stockholders' Equity Attributable to Parent, end of period	$ 4.8	$ 4.8	$ 4.8	$ 4.8	$ 4.8	$ 4.8
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent, beginning of period	346.2	345.9	344.4	343.4	345.9	343.4
Share-based compensation	1.5	0.3	0.4	0.5
Other	0.3		0.3	0.5
Stockholders' Equity Attributable to Parent, end of period	348.0	346.2	345.1	344.4	348.0	345.1
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent, beginning of period	(150.5)	(145.4)	(158.8)	(159.2)	(145.4)	(159.2)
Net income (loss)	5.6	(4.6)	8.4	7.3
Adjustment for accounting change		(0.5)		(6.9)
Stockholders' Equity Attributable to Parent, end of period	(144.9)	(150.5)	(150.4)	(158.8)	(144.9)	(150.4)
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent, beginning of period	(25.5)	(25.3)	(26.0)	(25.5)	(25.3)	(25.5)
Other	(0.1)	(0.2)		(0.5)
Stockholders' Equity Attributable to Parent, end of period	(25.6)	(25.5)	(26.0)	(26.0)	(25.6)	(26.0)
AOCI Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent, beginning of period	(118.0)	(122.4)	(117.9)	(125.3)	(122.4)	(125.3)
Foreign currency translations	(5.5)	3.8	(5.7)	6.3
Post-retirement benefit plans	0.9	0.6	1.1	1.1
Stockholders' Equity Attributable to Parent, end of period	$ (122.6)	$ (118.0)	$ (122.5)	$ (117.9)	$ (122.6)	$ (122.5)

Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Number of shares issued which are neither cancelled nor held in the treasury.

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Number of shares of stock issued attributable to transactions classified as other.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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