EQUITY (Changes in Total Equity) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
EQUITY [Abstract]
Balance at beginning of period	$ 6,545.0	$ 6,027.3
Net earnings attributable to Vulcan	91.8	160.6
Share-based compensation plans, net of shares withheld for taxes	(16.9)	(12.0)
Share-based compensation expense	7.5	7.9
Cash dividends on common stock ($0.37/$0.34/$1.11/$1.02 per share, respectively)	(53.2)	(49.1)
Other comprehensive income	1.1	1.6
Balance at end of period	6,575.3	6,136.3
Noncontrolling Interest, Balance at beginning of year	22.7	0.0
Earnings (loss) attributable to noncontrolling interest	0.3	0.0
Noncontrolling Interest, Balance at end of period	23.0	0.0
Balance at end of period	$ 6,598.3	$ 6,136.3	$ 6,567.7
Cash dividend on common stock, per share	$ 0.40	$ 0.37