CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 1,478.7	$ 1,506.4	$ 1,336.0
Cost of goods sold before depreciation, depletion and amortization	1,187.6	1,212.2	1,056.6
Selling, general and administrative expenses	130.0	126.5	119.2
Depreciation, depletion and amortization	93.2	91.8	67.8
Change in value of contingent consideration	2.8	0.0	7.9
Impairment of goodwill and other assets	0.0	1.3	6.2
Gain on sale/disposal of assets and business, net	(0.1)	(15.3)	(0.7)
Operating income	65.2	89.9	79.0
Interest expense, net	46.1	46.4	42.1
Derivative loss	0.0	0.0	0.8
Other income, net	(9.5)	(4.6)	(2.5)
Income from continuing operations before income taxes	28.6	48.1	38.6
Income tax expense	12.3	16.8	12.4
Income from continuing operations	16.3	31.3	26.2
Loss from discontinued operations, net of taxes	0.0	0.0	(0.6)
Net income	16.3	31.3	25.6
Less: Net income attributable to non-controlling interest	(1.4)	(1.3)	(0.1)
Net income attributable to U.S. Concrete	$ 14.9	$ 30.0	$ 25.5
Basic income per share attributable to U.S. Concrete:
Income from continuing operations (in dollars per share)	$ 0.91	$ 1.82	$ 1.64
Loss from discontinued operations, net of taxes (in dollars per share)	0	0	(0.04)
Net income per share attributable to U.S. Concrete - basic (in dollars per share)	0.91	1.82	1.60
Diluted income per share attributable to U.S. Concrete:
Income from continuing operations (in dollars per share)	0.91	1.82	1.57
Loss from discontinued operations, net of taxes (in dollars per share)	0	0	(0.04)
Net income per share attributable to U.S. Concrete - diluted (in dollars per share)	$ 0.91	$ 1.82	$ 1.53
Weighted average shares outstanding:
Basic (in shares)	16.4	16.5	15.9
Diluted (in shares)	16.4	16.5	16.6