REVENUES (Revenues by Geographic Market) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	$ 5,552.2	$ 4,856.8	$ 4,929.1
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	5,896.5	5,128.2	5,249.9
Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	(344.3)	(271.4)	(320.8)
U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	514.0
East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	1,669.5	1,604.0	1,682.5
Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	2,612.4	2,422.5	2,386.7
West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	1,100.6	1,101.7	1,180.7
Aggregates [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	4,000.7	3,672.9	3,669.5
Aggregates [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1],[2]	4,345.0	3,944.3	3,990.3
Aggregates [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	(344.3)	(271.4)	(320.8)
Aggregates [Member] | U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	113.0
Aggregates [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	1,283.7	1,198.1	1,254.8
Aggregates [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	2,350.5	2,165.2	2,117.5
Aggregates [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	597.8	581.0	618.0
Asphalt [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	777.8	792.6	855.8
Asphalt [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1],[3]	777.8	792.6	855.8
Asphalt [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0	0.0	0.0
Asphalt [Member] | U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0
Asphalt [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	142.4	142.2	166.5
Asphalt [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	179.6	178.5	194.4
Asphalt [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	455.8	471.9	494.9
Concrete [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	766.8	383.6	395.6
Concrete [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	766.8	383.6	395.6
Concrete [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0	0.0	0.0
Concrete [Member] | U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	401.0
Concrete [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	243.4	263.7	261.2
Concrete [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	75.4	71.1	66.6
Concrete [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	47.0	48.8	67.8
Calcium [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	6.9	7.7	8.2
Calcium [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	6.9	7.7	8.2
Calcium [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0	0.0	0.0
Calcium [Member] | U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0
Calcium [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0	0.0	0.0
Calcium [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	6.9	7.7	8.2
Calcium [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	$ 0.0	$ 0.0	$ 0.0

[1] ¹ The geographic markets are defined by states as follows: East market — Arkansas, Delaware, Illinois, Kentucky, Maryland, North Carolina, Pennsylvania, Tennessee, Virginia, and Washington D.C. Gulf Coast market — Alabama, Florida, Georgia, Louisiana, Mississippi, Oklahoma, Quintana Roo (Mexico), South Carolina and Texas West market — Arizona, California and New Mexico U.S. Concrete — British Columbia (Canada), California, Hawaii, New Jersey, New York, Oklahoma, Pennsylvania, Texas, the U.S. Virgin Islands and Washington D.C.

[2] Includes product sales, as well as freight & delivery costs that we pass along to our customers, and service revenues (see Note 2) related to aggregates.

[3] Includes product sales, as well as service revenues (see Note 2) from our asphalt construction paving business.