Effective Income Tax Rate, Excluding Unrecognized Tax Benefits, Percent

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Income Tax Disclosure [Line Items]

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Net operating loss attributable to Switzerland

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- Definition

Net operating loss attributable to U.S. federal

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- Definition

Net operating loss attributable to various acquired companies

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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity.

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- Definition

Amount, after refund, of cash paid to foreign, federal, state, and local jurisdictions as income tax.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Line Items]
Income tax expense (benefit), continuing operations, adjustment of deferred tax (asset) liability	$ (24)	$ (51)	$ (92)
Income taxes paid, net	201	404	300
Net operating loss carryforwards	3,600
Net operating loss attributable to various acquired companies	40
Net operating loss attributable to Switzerland	3,600
Net operating loss attributable to U.S. federal	52
Tax credit carry forwards	15
Deferred tax assets, valuation allowance	(544)	(534)
Gross unrecognized tax benefits	677	688	$ 804	$ 867
Unrecognized tax benefits that would impact effective tax rate	556
Unrecognized tax benefits, income tax penalties and interest accrued	154	$ 127
Non-US
Income Tax Disclosure [Line Items]
Cash, cash equivalents, and short-term investments	$ 796
Pro Forma
Income Tax Disclosure [Line Items]
Effective income tax rate, excluding unrecognized tax benefits, percent	26.90%	27.00%	26.70%
State [Member]
Income Tax Disclosure [Line Items]
Tax credit carry forwards	$ 224