Capital Stock (Narrative - Equity) (Details) - shares shares in Millions	Mar. 31, 2024	Mar. 31, 2023
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