EQUITY (Changes in Total Equity) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
EQUITY [Abstract]
Balance at beginning of period	$ 6,575.3	$ 6,136.2	$ 6,545.0	$ 6,027.3
Net earnings attributable to Vulcan	187.3	195.3	279.1	356.0
Share-based compensation plans, net of shares withheld for taxes	(0.1)	(0.7)	(17.1)	(12.9)
Share-based compensation expense	10.7	9.8	18.2	17.7
Cash dividends on common stock ($0.40/$0.37/$0.80/$0.74 per share, respectively)	(53.2)	(49.1)	(106.3)	(98.2)
Other comprehensive income	1.1	1.6	2.2	3.2
Balance at end of period	6,721.1	6,293.1	6,721.1	6,293.1
Noncontrolling Interest, Balance at beginning of period	23.0	0.0	22.7	0.0
Earnings (loss) attributable to noncontrolling interest	0.1	0.0	0.4	0.0
Noncontrolling Interest, Balance at end of period	23.1	0.0	23.1	0.0
Balance at end of period	$ 6,744.2	$ 6,293.1	$ 6,744.2	$ 6,293.1	$ 6,567.7
Cash dividend on common stock, per share	$ 0.40	$ 0.37	$ 0.80	$ 0.74