ACQUISITIONS AND DIVESTITURES (Narrative) (Details)			3 Months Ended			12 Months Ended
		Aug. 26, 2021 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) item	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Significant Acquisitions and Disposals [Line Items]
Cash						$ 529,200,000	$ 1,639,400,000	$ 43,200,000
Goodwill	[1]					43,800,000	524,600,000
Loss on impairments						67,900,000	4,600,000	0.0
Gain (loss) on sale of property, plant & equipment and businesses						10,700,000	120,100,000	4,000,000.0
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Significant Acquisitions and Disposals [Line Items]
Assets held for sale			$ 0			0	$ 0	0
Acquisitions 2022 [Member]
Significant Acquisitions and Disposals [Line Items]
Total consideration						594,600,000
Cash						529,200,000
Noncash consideration amount						65,400,000
Amortizable intangible assets recognized						$ 72,300,000
Intangible assets amortization period, tax purposes						15 years
Goodwill						$ 12,500,000
Goodwill, deductible for income tax purposes			0			0
Acquisitions 2021 [Member]
Significant Acquisitions and Disposals [Line Items]
Amortizable intangible assets recognized						685,500,000
Goodwill						555,900,000
Changes in carrying amount of goodwill						31,300,000
Goodwill, deductible for income tax purposes			108,500,000			108,500,000
Acquisitions 2020 [Member]
Significant Acquisitions and Disposals [Line Items]
Total consideration								73,400,000
Cash								43,200,000
Noncash consideration amount								30,200,000
Amortizable intangible assets recognized								65,500,000
Intangible assets amortization period, tax purposes							15 years
Goodwill								5,100,000
Intangible assets, not deductible for income tax purposes								$ 25,700,000
Immaterial Business Acquisitions [Member]
Significant Acquisitions and Disposals [Line Items]
Total consideration							$ 4,900,000
U.S. Concrete [Member]
Significant Acquisitions and Disposals [Line Items]
Total consideration		$ 1,634,500,000				1,634,500,000
Cash		$ 1,268,500,000
Goodwill						555,900,000
New York, New Jersey And Pennsylvania [Member] | Concrete [Member]
Significant Acquisitions and Disposals [Line Items]
Loss on impairments			67,800,000	$ 16,900,000
Gain (loss) on sale of property, plant & equipment and businesses			$ (17,400,000)
California [Member]
Significant Acquisitions and Disposals [Line Items]
Consideration transferred, net of assets divested					$ 12,900,000
Gain (loss) on sale of property, plant & equipment and businesses					$ 114,700,000
California [Member] | Excess Real Estate [Member]
Significant Acquisitions and Disposals [Line Items]
Gain (loss) on sale of property, plant & equipment and businesses				$ 23,500,000
New Mexico [Member]
Significant Acquisitions and Disposals [Line Items]
Supply agreement period								20 years
Virginia [Member]
Significant Acquisitions and Disposals [Line Items]
Supply agreement period								20 years
Aggregates [Member]
Significant Acquisitions and Disposals [Line Items]
Goodwill	[1]					$ 13,700,000	$ 236,100,000
Aggregates [Member] | California [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | item						8
Aggregates [Member] | Texas [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | item						5
Asphalt Mix [Member] | California [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | item						4
Ready-Mixed Concrete Facilities [Member] | California [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | item						7
Ready-Mixed Concrete Facilities [Member] | Virginia [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | item						4
Idle Ready-Mixed Concrete Sites [Member] | Virginia [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | item						2
Amortizable Intangible Asset Straight-Line Method [Member] | Acquisitions 2022 [Member]
Significant Acquisitions and Disposals [Line Items]
Estimated weighted-average amortization period of intangible assets						15 years
Amortizable Intangible Asset Straight-Line Method [Member] | Acquisitions 2021 [Member]
Significant Acquisitions and Disposals [Line Items]
Estimated weighted-average amortization period of intangible assets						15 years
Amortizable Intangible Asset Straight-Line Method [Member] | Acquisitions 2020 [Member]
Significant Acquisitions and Disposals [Line Items]
Amortizable intangible assets recognized								$ 65,500,000
Estimated weighted-average amortization period of intangible assets							20 years

[1] See Note 19 for a summary of recent acquisitions.