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Capital Stock (Shares Reserved for Future Issuance) (Details) - shares shares in Millions | Mar. 31, 2023 | Mar. 31, 2022
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares reserved for future issuance (in shares) | 50.2 | 53.9
Stock options and SARs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares reserved for future issuance (in shares) | 24.8 | 27.6
Restricted Share Units (RSUs) and Restricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares reserved for future issuance (in shares) | 14.0 | 7.9
Common shares available for future issuance under plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares reserved for future issuance (in shares) | 11.4 | 18.4

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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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. + Details
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