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Share-based Payments - Monte Carlo Valuation Model Assumptions Used in Determining Fair Value of TSR Awards (Details) - Performance Stock Units [Member] - $ / shares	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Share-based Payments [Abstract]
Risk free interest rate			3.35%
Expected life in years	3 years		3 years
Expected volatility of MPA common stock			51.30%
Expected average volatility of peer companies	0.00%	0.00%	62.70%
Average correlation coefficient of peer companies		0.00%	27.50%
Expected dividend yield	0.00%	0.00%	0.00%
Grant date fair value (in Dollars per share)			$ 16.02
Minimum [Member]
Share-based Payments [Abstract]
Risk free interest rate	4.21%	4.32%
Expected life in years		2 months 12 days
Expected volatility of MPA common stock	59.80%	54.20%
Average correlation coefficient of peer companies	16.50%
Grant date fair value (in Dollars per share)	$ 8.65	$ 3.57
Maximum [Member]
Share-based Payments [Abstract]
Risk free interest rate	4.45%	4.35%
Expected life in years		1 year 9 months 18 days
Expected volatility of MPA common stock	62.80%	55.10%
Average correlation coefficient of peer companies	17.40%
Grant date fair value (in Dollars per share)	$ 8.88	$ 8.37

X

- Definition

Rate of Average correlation coefficient of peer companies for awards under share-based payment arrangement.

+ References

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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