Effective Income Tax Rate Reconciliation, Impact of Investment Liquidation, Amount

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Effective Income Tax Rate Reconciliation,Intellectual Property Transfer, Net Tax Benefit

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Effective Income Tax Reconciliation, Tax Expense (Benefit), Intra-Entity Transfers Of Assets Other Than Inventory, Amount

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Income Tax Examination, Estimate Of Possible Liability Adjustment

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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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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 sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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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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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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Amount of unrecognized tax benefits.

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Amount of interest expense accrued for an underpayment of income taxes.

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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	3 Months Ended				12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Income Tax Contingency [Line Items]
Liquidation of investment					$ (158)
Valuation allowance release						$ 0	$ (157)
Net tax benefit on intellectual property repatriation and sales						(258)	(104)
Tax expense (benefit), intra-entity transfers of assets other than inventory, amount	$ 214	$ 44	$ (43)	$ 147
Less: valuation allowance	(644)				(769)	(644)
Unrecognized tax benefits	1,532		$ 1,463		1,574	1,532	1,463	$ 1,399
Unrecognized tax benefits that would impact effective tax rate					1,500
Income tax expense (benefit), before any tax effect, related to accrued interest and penalties					74	80	$ 84
Accrued interest and penalties on unrecognized tax benefits	$ 302				376	$ 302
Undistributed earnings of foreign operations					3,700
Minimum
Income Tax Contingency [Line Items]
Tax liability increase due to proposed adjustment to taxable income					600
Maximum
Income Tax Contingency [Line Items]
Tax liability increase due to proposed adjustment to taxable income					700
Luxembourg
Income Tax Contingency [Line Items]
Valuation allowance release					(119)
Federal
Income Tax Contingency [Line Items]
Federal, state and foreign net operating loss carryforwards					53
Federal \| Capital Loss Carryforward
Income Tax Contingency [Line Items]
Federal, state and foreign net operating loss carryforwards					801
State
Income Tax Contingency [Line Items]
Federal, state and foreign net operating loss carryforwards					4,000
State \| Capital Loss Carryforward
Income Tax Contingency [Line Items]
Federal, state and foreign net operating loss carryforwards					1,400
Foreign Tax Jurisdiction
Income Tax Contingency [Line Items]
Federal, state and foreign net operating loss carryforwards					1,200
Foreign Tax Jurisdiction \| Capital Loss Carryforward
Income Tax Contingency [Line Items]
Federal, state and foreign net operating loss carryforwards					$ 1,200