Business Segments - Additional Information (Detail) $ in Millions		12 Months Ended
May 01, 2024 USD ($)	Mar. 31, 2024 Plant Terminal Location Facility Segment Sector
Segment Reporting Information [Line Items]
Number of sectors \| Sector		2
Number of reportable business segments \| Segment		4
Cement plant locations \| Location		8
Slag grinding facility \| Facility		1
Cement distribution terminals \| Terminal		30
Readymix concrete batch plants		25
Aggregates processing plants		5
Gypsum wallboard plants		5
Proportionate consolidation of share of joint venture revenues and operating earnings		50.00%
Subsequent Event [Member]
Segment Reporting Information [Line Items]
Required percentage of purchase partnership interest	50.00%
Cost incurred in connection with purchase of partnership interest \| $	$ 550.0
Put option effective period	15 months
Put option expiration date	Aug. 01, 2025
HM Southeast Cement LLC [Member] \| Subsequent Event [Member]
Segment Reporting Information [Line Items]
Partnership interests	50.00%
Minimum [Member] \| Subsequent Event [Member]
Segment Reporting Information [Line Items]
Consideration for the purchase of assets or operations \| $	$ 1,000.0

Aggregates processing plants.

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Cement distribution terminals.

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Cement plant locations.

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Gypsum wallboard plants.

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Number of sectors.

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Put option effective period.

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Put option expiration date.

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Readymix plants.

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Required percentage of purchase partnership interest.

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Segment reporting information proportionate consolidation of joint ventures revenues and operating earnings.

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Slag grinding facility.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Costs incurred in connection with the offering and selling of additional partner interest.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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