GOODWILL AND INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2021
GOODWILL AND INTANGIBLE ASSETS [Abstract]
Changes in Carrying Amount of Goodwill by Reportable Segment	in millionsAggregates Asphalt Concrete Calcium Total Goodwill Totals at December 31, 2019$      3,075.4  $         91.6  $           0.0  $           0.0  $      3,167.0  Goodwill of acquired businesses 1 5.1  0.0  0.0  0.0  5.1  Totals at December 31, 2020$      3,080.5  $         91.6  $           0.0  $           0.0  $      3,172.1  Goodwill of acquired businesses 1 236.1  0.0  288.5  0.0  524.6  Totals at December 31, 2021$      3,316.6  $         91.6  $       288.5  $           0.0  $      3,696.7  1See Note 19 for a summary of recent acquisitions.
Gross Carrying Amount and Accumulated Amortization by Major Intangible Asset Class	in millions2021 2020 Gross Carrying Amount Contractual rights in place $       1,765.0  $      1,159.0  Permitting, permitting compliance and zoning rights 156.5  138.9  Other 1 115.0  57.6  Total gross carrying amount$       2,036.5  $      1,355.5  Accumulated Amortization Contractual rights in place $         (230.9) $        (188.9) Permitting, permitting compliance and zoning rights (39.1) (30.2) Other 1 (17.5) (12.9) Total accumulated amortization$         (287.5) $        (232.0) Total Intangible Assets Subject to Amortization, net$       1,749.0  $      1,123.5  Intangible Assets with Indefinite Lives 0.0  0.0  Total Intangible Assets, net 1,749.0  1,123.5  Amortization Expense for the Year$            68.2  $           46.6  1Includes noncompetition agreements, patents, customer relationships, tradenames and trademarks.
Estimated Amortization Expense	in millions Estimated Amortization Expense for Five Subsequent Years 2022$           79.5  2023 77.7  2024 75.9  2025 75.6  2026 75.1