Business Segments - Financial Information Related to Operations by Segment (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Depreciation, Depletion, and Amortization	$ 158,902	$ 149,832	$ 138,554
Corporate Assets [Member]
Segment Reporting Information [Line Items]
Depreciation, Depletion, and Amortization	$ 3,249,000	$ 3,117,000	$ 2,812,000

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Name:	us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration