Other Noncurrent Assets (Tables)

6 Months Ended

Jun. 30, 2017

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Other Noncurrent Assets

	December 31,2016		June 30, 2017
	(In millions)
Other noncurrent assets:
Land held for development	$	138.1	$	131.1
Waste disposal site operating permits, net		42.9		—
Restricted cash		24.2		34.8
IBNR receivables		7.1		7.2
Capital lease deposit		6.2		6.2
Pension asset		1.6		2.1
Other		17.9		15.5
Total	$	238.0	$	196.9