Segment, Geographical Area, Major Customer and Major Supplier Information (Income From Reportable Segments) (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 1,802	$ 1,873	$ 1,811
Operating Segments \| North America Segment
Segment Reporting Information [Line Items]
Adjusted EBITDA	640	749	673
Operating Segments \| Europe Segment
Segment Reporting Information [Line Items]
Adjusted EBITDA	306	321	286
Operating Segments \| Asia Segment
Segment Reporting Information [Line Items]
Adjusted EBITDA	347	334	339
Operating Segments \| South America
Segment Reporting Information [Line Items]
Adjusted EBITDA	504	472	522
Intersegment eliminations
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 5	$ (3)	$ (9)

The net result for the period of deducting operating expenses from operating revenues.

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