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Capital Stock (Narrative - Equity) (Details) - shares shares in Millions | Mar. 31, 2023 | Mar. 31, 2022
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Class A Voting Common Shares |  |
Class of Stock [Line Items] |  |
Authorized common shares (in shares) | 500.0 | 500.0
Class B Non-Voting Common Shares |  |
Class of Stock [Line Items] |  |
Authorized common shares (in shares) | 500.0 | 500.0

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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + 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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