ACCRUED ENVIRONMENTAL REMEDIATION COSTS	12 Months Ended
	Dec. 31, 2021
ACCRUED ENVIRONMENTAL REMEDIATION COSTS [Abstract]
ACCRUED ENVIRONMENTAL REMEDIATION COSTS	NOTE 8: ACCRUED ENVIRONMENTAL REMEDIATION COSTSOur Consolidated Balance Sheets as of December 31 include accrued environmental remediation costs (measured on an undiscounted basis) as follows: in millions2021 2020 Accrued Environmental Remediation Costs Continuing operations$           23.2  $          25.5  Retained from former Chemicals business 10.7  11.0  Total$           33.9  $          36.5  The long-term portion of the accruals noted above is included in other noncurrent liabilities in the accompanying Consolidated Balance Sheets and amounted to $15.9 million at December 31, 2021 and $12.9 million at December 31, 2020. The short-term portion of these accruals is included in other current liabilities in the accompanying Consolidated Balance Sheets.The accrued environmental remediation costs in continuing operations relate primarily to the former Florida Rock, Tarmac, and CalMat facilities acquired in 2007, 2000 and 1999, respectively. The balances noted above for the former Chemicals business relate to retained environmental remediation costs from the 2003 sale of the Performance Chemicals business and the 2005 sale of the Chloralkali business. Refer to Note 12 for additional discussion of contingent environmental matters.