CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 334.4	$ 333.1
Cost of goods sold before depreciation, depletion and amortization	273.9	268.4
Selling, general and administrative expenses	33.7	32.1
Depreciation, depletion and amortization	23.4	22.8
Change in value of contingent consideration	0.3	1.0
Loss on sale/disposal of assets, net	0.0	0.9
Operating income	3.1	7.9
Interest expense, net	11.4	11.6
Other income, net	(0.6)	(0.4)
Income (loss) before income taxes, equity in earnings of subsidiaries and non-controlling interest	(7.7)	(3.3)
Income tax expense (benefit)	(4.9)	(0.7)
Net income (loss)	(2.8)	(2.6)
Less: Net income attributable to non-controlling interest	(0.3)	(0.1)
Net income (loss) attributable to U.S. Concrete	$ (3.1)	$ (2.7)
Earnings (loss) per share attributable to U.S. Concrete:
Basic earnings per share (in dollars per share)	$ (0.19)	$ (0.16)
Diluted earnings per share (in dollars per share)	$ (0.19)	$ (0.16)
Weighted average shares outstanding:
Basic (in shares)	16.5	16.3
Diluted (in shares)	16.5	16.3