STOCKHOLDERS' EQUITY: Time-Vesting Restricted Stock Unit Activity (Details) - Restricted stock units - Time Based Vesting - $ / shares	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Non-vested restricted stock unit activity
Outstanding at the beginning of the period (in shares)	2,692,243
Granted (in shares)	3,191,809	2,228,445	1,697,506
Vested (in shares)	(642,656)
Forfeited or cancelled (in shares)	(1,064,714)
Outstanding at the end of the period (in shares)	4,176,682	2,692,243
Non-vested restricted stock units, Weighted average fair value per share at grant date
Outstanding at the beginning of the period (in dollars per share)	$ 45.96
Granted (in dollars per share)	47.22
Vested (in dollars per share)	44.15
Forfeited or cancelled (in dollars per share)	46.75
Outstanding at the end of the period (in dollars per share)	$ 47.00	$ 45.96
Weighted average remaining contractual term (in years)	2 years 10 months 6 days	2 years 9 months 3 days

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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