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ACCRUED LIABILITIES
 12 Months Ended
Dec. 31, 2020
Payables and Accruals [Abstract]  
ACCRUED LIABILITIES ACCRUED LIABILITIES
Accrued liabilities consisted of the following at December 31:
In millions
20202019
Compensation$97.6 $68.6 
Self-insurance78.1 74.7 
Taxes51.2 50.7 
Interest19.4 21.3 
Professional fees11.2 22.1 
Disposal and landfill liabilities1.6 18.8 
Other30.3 40.4 
Total accrued liabilities$289.4 $296.6