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Aggregate number of common shares reserved for future issuance.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made 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).

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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).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Disclosure of the weighted average expected dividend for an entity using a valuation technique with different dividend rates during the contractual term.

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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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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Percentage of vesting of award under share-based payment arrangement.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Purchase price of common stock expressed as a percentage of its fair value.

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

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Share-based Compensation - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jul. 31, 2019	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit recognized on shares-based compensation arrangements		$ 64,100,000	$ 38,100,000	$ 43,100,000
Aggregate intrinsic value of options exercised		46,100,000	37,900,000	52,600,000
Aggregate fair value of options vested		9,100,000	$ 16,700,000	$ 23,100,000
Total unrecognized compensation expense related to non-vested stock options		$ 1,400,000
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of options granted (in dollars per share)				$ 20.90
Options granted (in shares)		0	0
Weighted average period of recognition		6 months
Expected dividend yield		$ 0		$ 0
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of recognition		2 years 1 month 6 days
RSUs outstanding (in shares)		9,852,000	8,836,000
Weighted average grant-date fair value of units granted (in dollars per share)		$ 51.60	$ 40.42	$ 50.19
Awards granted (in shares)		6,193,000
Aggregate fair value of awards/units vested		$ 220,300,000	$ 82,100,000	$ 72,200,000
Total unrecognized compensation expense related to unvested awards/units		$ 375,400,000
Service Condition RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding (in shares)		8,900,000
Service and performance condition RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding (in shares)		900,000
Maximum percentage of shares issued based on performance target award		2
RSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of recognition		2 years 10 months 24 days
RSUs outstanding (in shares)		142,000	4,000
Weighted average grant-date fair value of units granted (in dollars per share)		$ 49.05
Awards granted (in shares)		142,000	0	0
Aggregate fair value of awards/units vested		$ 200,000	$ 6,800,000	$ 27,700,000
Total unrecognized compensation expense related to unvested awards/units		$ 8,700,000
Shares committed under ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved and available for issuance as a percentage of shares outstanding	1.00%
Increase In the number of shares reserved and available for issuance (in shares)	3,500,000
ESPP offering period	6 months
Purchase period	6 months
Shares committed under ESPP \| Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP, maximum percentage of the common stock available for purchase	85.00%
Share-based Payment Arrangement, Tranche One \| Service and performance condition RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		1 year
Vesting percentage		33.00%
Share-based Payment Arrangement, Tranche Two \| Service and performance condition RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		2 years
Vesting percentage		67.00%
Minimum \| Performance-based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Maximum \| Performance-based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	52,000,000	49,844,520
Annual increase percentage in shares reserved for future issuance based off of shares outstanding	4.00%
2019 Plan \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		1 year
Vesting percentage		33.00%
2019 Plan \| Share-based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		1 year
Vesting percentage		25.00%
2019 Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
2019 Plan \| Minimum \| Share-based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		2 years
2019 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
2019 Plan \| Maximum \| Share-based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield		$ 0	$ 0	$ 0
Total unrecognized compensation expense related to unvested awards/units		$ 1,200,000
ESPP \| Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)		15,865,787
Issuance of common stock related to employee stock purchase plan (in shares)		534,022