Shareholders' Equity - Restricted share units (Details) shares in Millions	3 Months Ended
Apr. 30, 2022 shares
Restricted share units, Vesting based on service
Equity Compensation
Granted/issued (in shares)	0.1
Restricted share units, Vesting based on performance (TSR- based)
Equity Compensation
Granted/issued (in shares)	0.1
Comparative period	3 years
Restricted share units, Vesting based on performance (TSR- based) \| Minimum
Equity Compensation
Shares earned as a percent of share target	0.00%
Restricted share units, Vesting based on performance (TSR- based) \| Maximum
Equity Compensation
Shares earned as a percent of share target	200.00%

The comparative period for determining performance results, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. References

No definition available.

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- Definition

The number of shares earned as a percentage of share target.

+ References

No definition available.

+ Details

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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