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Consolidated Statement of Changes in Stockholders Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Statement of Stockholders' Equity [Abstract]
Pension and postretirement adjustments, tax portion	$ 2.2	$ 0.4	$ 0.5
Net effect			$ 16.0

X

- Definition

Amount of cumulative tax effect on beginning retained earnings from change in accounting principle.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
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X

- Definition

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

+ References

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- References

No definition available.

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