Stock-Based Compensation, Employee Benefit Plans, and Stock Repurchase Program - Summary of ESPP Activity (Details) - Employee Stock - $ / shares shares in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Shares issued (in shares)	0.8	0.7	0.8
Weighted-Average Fair Values of Purchase Rights	$ 32.74	$ 34.07	$ 30.82
Minimum
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Exercise Prices for Purchase Rights	109.10	102.58	94.96
Maximum
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Exercise Prices for Purchase Rights	$ 143.79	$ 120.94	$ 102.58

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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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480489/718-40-50-1

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The weighted average fair value at grant date for nonvested equity-based awards issued 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
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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