XML 137 R121.htm IDEA: XBRL DOCUMENT v3.24.0.1
Telford Fire Safety Remediation - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]    
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other liabilities  
Environmental Loss Contingency, Statement Of Financial Position, Extensible Enumeration, Not Disclosed Flag liability  
Environmental Loss Contingency, Current, Statement of Financial Position [Extensible Enumeration] Other current liabilities  
Telford Fire Safety Remediation    
Restructuring Cost and Reserve [Line Items]    
Estimated environmental liability $ 192.1 $ 185.9
Current portion of estimated environmental liability $ 82.2 $ 51.6