Discontinued Operations and Assets and Liabilities Held for Sale - Additional Information (Detail) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2022 Plant
Business Acquisition [Line Items]
Cash used for operating and investing activities for discontinued operations	$ 5.4	$ 14.0
Proceeds from divestitures	$ 1.6	$ 8.6
Business combination number of California ready mix operations \| Plant			14

Business combination number of California ready mix operations.

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- Definition

Cash used for operating and investing activities for discontinued operations.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

Amount of capital expenditure attributable to discontinued operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (c)(2)
-URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

+ Details

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