Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2018

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 2018.

	Amount
	(In millions)
Balance at the beginning of the year	$	117.5
Additions charged to expense, net		4.5
Payments, net		(1.1	)
Balance at the end of period	$	120.9
Amounts recognized in our Condensed Consolidated Balance Sheet at the    end of the period:
Current liabilities	$	19.6
Noncurrent liabilities		101.3
Total	$	120.9