Commitments and contingencies (Tables)

6 Months Ended

Jun. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Change in Accrued Environmental Remediation and Related Costs

The table below presents a summary of the activity in our accrued environmental costs during the first six months of 2024.

	Amount
	(In millions)
Balance at the beginning of the period	$	96.9
Additions charged to expense, net		1.7
Payments, net		(1.6)
Balance at the end of the period	$	97.0
Amounts recognized in the Condensed Consolidated Balance Sheet   at the end of the period:
Current liabilities	$	3.9
Noncurrent liabilities		93.1
Total	$	97.0