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, after income tax refund received, of cash paid to federal (national) tax jurisdiction for tax on income.

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Amount, after income tax refund received, of cash paid to foreign tax jurisdiction for tax on income.

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Amount, after income tax refund received, of cash paid to state and local tax jurisdictions for tax on income.

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2A
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-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Topic 740
-SubTopic 10
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-Section 50
-Paragraph 22
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Income Taxes - Schedule of Cash Paid for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Income Tax Paid, by Individual Jurisdiction [Line Items]
U.S. Federal	$ 839
U.S. States	131
Total cash taxes paid, net of refunds	1,211	$ 1,124	$ 901
Canada
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	114
United Kingdom
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	103
Others
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	$ 24